/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:36:09,785 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:36:09,867 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 13:36:09,871 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:36:09,872 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:36:09,903 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:36:09,904 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:36:09,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:36:09,905 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:36:09,909 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:36:09,909 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:36:09,909 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:36:09,909 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:36:09,911 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:36:09,911 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:36:09,911 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:36:09,911 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:36:09,912 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:36:09,912 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:36:09,912 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:36:09,912 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:36:09,913 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:36:09,913 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:36:09,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:36:09,914 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:36:09,914 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:36:09,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:36:09,914 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:36:09,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:36:09,915 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:36:09,916 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:36:09,916 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:36:09,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:36:09,916 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:36:09,917 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:36:09,917 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:36:10,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:36:10,245 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:36:10,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:36:10,248 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:36:10,248 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:36:10,249 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-26 13:36:11,445 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:36:11,648 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:36:11,649 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-difference-det.wvr.c [2023-08-26 13:36:11,655 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be82e8700/455c22cedc5b4fff9ad48b76f781a766/FLAGe0ea41fe8 [2023-08-26 13:36:11,664 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be82e8700/455c22cedc5b4fff9ad48b76f781a766 [2023-08-26 13:36:11,666 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:36:11,667 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:36:11,668 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:36:11,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:36:11,671 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:36:11,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,672 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76deef83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11, skipping insertion in model container [2023-08-26 13:36:11,672 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,690 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:36:11,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:36:11,831 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:36:11,850 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:36:11,856 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:36:11,857 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:36:11,861 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:36:11,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11 WrapperNode [2023-08-26 13:36:11,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:36:11,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:36:11,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:36:11,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:36:11,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,892 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 126 [2023-08-26 13:36:11,892 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:36:11,893 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:36:11,893 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:36:11,893 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:36:11,899 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,899 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,902 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,902 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,907 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,910 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,913 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,915 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:36:11,916 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:36:11,916 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:36:11,916 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:36:11,916 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (1/1) ... [2023-08-26 13:36:11,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:36:11,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:36:11,950 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 13:36:11,973 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 13:36:11,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:36:11,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:36:11,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:36:11,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:36:11,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:36:11,994 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:36:11,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:36:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 13:36:11,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 13:36:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:36:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:36:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:36:11,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:36:11,996 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:36:11,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:36:11,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:36:11,996 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:36:11,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:36:11,998 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 13:36:12,078 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:36:12,080 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:36:12,465 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:36:12,510 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:36:12,510 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-26 13:36:12,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:36:12 BoogieIcfgContainer [2023-08-26 13:36:12,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:36:12,514 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:36:12,514 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:36:12,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:36:12,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:36:11" (1/3) ... [2023-08-26 13:36:12,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7147b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:36:12, skipping insertion in model container [2023-08-26 13:36:12,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:36:11" (2/3) ... [2023-08-26 13:36:12,518 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7147b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:36:12, skipping insertion in model container [2023-08-26 13:36:12,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:36:12" (3/3) ... [2023-08-26 13:36:12,519 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-difference-det.wvr.c [2023-08-26 13:36:12,535 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:36:12,535 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 13:36:12,535 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:36:12,604 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 13:36:12,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 146 transitions, 324 flow [2023-08-26 13:36:12,696 INFO L124 PetriNetUnfolderBase]: 9/142 cut-off events. [2023-08-26 13:36:12,696 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 13:36:12,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 142 events. 9/142 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 171 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-26 13:36:12,704 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 146 transitions, 324 flow [2023-08-26 13:36:12,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 129 transitions, 282 flow [2023-08-26 13:36:12,711 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:36:12,720 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 129 transitions, 282 flow [2023-08-26 13:36:12,742 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 129 transitions, 282 flow [2023-08-26 13:36:12,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 129 transitions, 282 flow [2023-08-26 13:36:12,786 INFO L124 PetriNetUnfolderBase]: 9/129 cut-off events. [2023-08-26 13:36:12,787 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 13:36:12,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146 conditions, 129 events. 9/129 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 170 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-26 13:36:12,790 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2023-08-26 13:36:17,099 INFO L134 LiptonReduction]: Checked pairs total: 3763 [2023-08-26 13:36:17,099 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-26 13:36:17,112 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:36:17,117 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;@1b8b1027, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:36:17,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-26 13:36:17,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:36:17,118 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:36:17,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:36:17,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:17,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:36:17,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:17,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:17,124 INFO L85 PathProgramCache]: Analyzing trace with hash 578, now seen corresponding path program 1 times [2023-08-26 13:36:17,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:17,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161946942] [2023-08-26 13:36:17,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:17,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:17,210 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 13:36:17,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:17,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161946942] [2023-08-26 13:36:17,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161946942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:17,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:17,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:36:17,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802929067] [2023-08-26 13:36:17,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:17,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:36:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:17,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:36:17,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:36:17,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 265 [2023-08-26 13:36:17,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 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 13:36:17,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:17,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 265 [2023-08-26 13:36:17,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:17,583 INFO L124 PetriNetUnfolderBase]: 2524/3163 cut-off events. [2023-08-26 13:36:17,583 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-26 13:36:17,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6422 conditions, 3163 events. 2524/3163 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11437 event pairs, 1182 based on Foata normal form. 0/1489 useless extension candidates. Maximal degree in co-relation 4966. Up to 3134 conditions per place. [2023-08-26 13:36:17,609 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 39 selfloop transitions, 0 changer transitions 0/43 dead transitions. [2023-08-26 13:36:17,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 43 transitions, 188 flow [2023-08-26 13:36:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:36:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:36:17,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 297 transitions. [2023-08-26 13:36:17,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.560377358490566 [2023-08-26 13:36:17,621 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 297 transitions. [2023-08-26 13:36:17,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 297 transitions. [2023-08-26 13:36:17,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:17,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 297 transitions. [2023-08-26 13:36:17,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.5) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 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 13:36:17,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 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 13:36:17,632 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 265.0) internal successors, (795), 3 states have internal predecessors, (795), 0 states have call successors, (0), 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 13:36:17,633 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 114 flow. Second operand 2 states and 297 transitions. [2023-08-26 13:36:17,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 43 transitions, 188 flow [2023-08-26 13:36:17,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 13:36:17,641 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 94 flow [2023-08-26 13:36:17,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=94, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-26 13:36:17,645 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-26 13:36:17,645 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 94 flow [2023-08-26 13:36:17,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 0 states have call successors, (0), 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 13:36:17,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:17,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:36:17,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:36:17,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:17,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:17,647 INFO L85 PathProgramCache]: Analyzing trace with hash 570083, now seen corresponding path program 1 times [2023-08-26 13:36:17,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:17,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337858658] [2023-08-26 13:36:17,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:17,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:17,951 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 13:36:17,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:17,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337858658] [2023-08-26 13:36:17,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337858658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:17,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:17,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:36:17,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023566978] [2023-08-26 13:36:17,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:17,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:36:17,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:36:17,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:36:17,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 265 [2023-08-26 13:36:17,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 13:36:17,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:17,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 265 [2023-08-26 13:36:17,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:18,189 INFO L124 PetriNetUnfolderBase]: 2413/3022 cut-off events. [2023-08-26 13:36:18,190 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:36:18,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6057 conditions, 3022 events. 2413/3022 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 10827 event pairs, 1127 based on Foata normal form. 0/1434 useless extension candidates. Maximal degree in co-relation 6054. Up to 2992 conditions per place. [2023-08-26 13:36:18,205 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 36 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 13:36:18,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 164 flow [2023-08-26 13:36:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:18,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:18,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-26 13:36:18,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43018867924528303 [2023-08-26 13:36:18,211 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-26 13:36:18,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-26 13:36:18,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:18,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-26 13:36:18,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 13:36:18,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:18,218 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:18,218 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 94 flow. Second operand 3 states and 342 transitions. [2023-08-26 13:36:18,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 164 flow [2023-08-26 13:36:18,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:36:18,223 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 92 flow [2023-08-26 13:36:18,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2023-08-26 13:36:18,225 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -9 predicate places. [2023-08-26 13:36:18,226 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 92 flow [2023-08-26 13:36:18,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 13:36:18,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:18,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:36:18,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:36:18,231 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:18,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:18,233 INFO L85 PathProgramCache]: Analyzing trace with hash 570085, now seen corresponding path program 1 times [2023-08-26 13:36:18,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:18,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755922727] [2023-08-26 13:36:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:18,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:18,355 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 13:36:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755922727] [2023-08-26 13:36:18,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755922727] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:18,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:18,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:36:18,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804986412] [2023-08-26 13:36:18,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:18,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:36:18,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:36:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:36:18,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 265 [2023-08-26 13:36:18,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 13:36:18,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:18,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 265 [2023-08-26 13:36:18,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:18,547 INFO L124 PetriNetUnfolderBase]: 2302/2881 cut-off events. [2023-08-26 13:36:18,548 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:36:18,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5777 conditions, 2881 events. 2302/2881 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 10223 event pairs, 1072 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 5773. Up to 2851 conditions per place. [2023-08-26 13:36:18,565 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 13:36:18,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 158 flow [2023-08-26 13:36:18,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:18,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-26 13:36:18,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125786163522013 [2023-08-26 13:36:18,567 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-26 13:36:18,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-26 13:36:18,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:18,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-26 13:36:18,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 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 13:36:18,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:18,571 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:18,571 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 92 flow. Second operand 3 states and 328 transitions. [2023-08-26 13:36:18,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 158 flow [2023-08-26 13:36:18,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:18,573 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 89 flow [2023-08-26 13:36:18,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-26 13:36:18,574 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -10 predicate places. [2023-08-26 13:36:18,574 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 89 flow [2023-08-26 13:36:18,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 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 13:36:18,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:18,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:36:18,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:36:18,578 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:18,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:18,579 INFO L85 PathProgramCache]: Analyzing trace with hash 547864277, now seen corresponding path program 1 times [2023-08-26 13:36:18,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:18,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833387107] [2023-08-26 13:36:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:18,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:18,705 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 13:36:18,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833387107] [2023-08-26 13:36:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833387107] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:18,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:18,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:36:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337128781] [2023-08-26 13:36:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:18,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:36:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:18,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:36:18,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:36:18,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 265 [2023-08-26 13:36:18,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 13:36:18,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:18,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 265 [2023-08-26 13:36:18,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:18,972 INFO L124 PetriNetUnfolderBase]: 2256/2817 cut-off events. [2023-08-26 13:36:18,972 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:36:18,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5650 conditions, 2817 events. 2256/2817 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9842 event pairs, 1050 based on Foata normal form. 0/1355 useless extension candidates. Maximal degree in co-relation 5646. Up to 2787 conditions per place. [2023-08-26 13:36:18,987 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 32 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 13:36:18,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 37 transitions, 151 flow [2023-08-26 13:36:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-26 13:36:18,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42515723270440253 [2023-08-26 13:36:18,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-26 13:36:18,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-26 13:36:18,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:18,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-26 13:36:18,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 13:36:18,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:18,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:18,993 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 89 flow. Second operand 3 states and 338 transitions. [2023-08-26 13:36:18,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 37 transitions, 151 flow [2023-08-26 13:36:18,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:18,995 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 86 flow [2023-08-26 13:36:18,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-26 13:36:18,996 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -11 predicate places. [2023-08-26 13:36:18,996 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 86 flow [2023-08-26 13:36:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 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 13:36:18,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:18,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:36:18,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:36:18,997 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:18,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:18,997 INFO L85 PathProgramCache]: Analyzing trace with hash 547864276, now seen corresponding path program 1 times [2023-08-26 13:36:18,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:18,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376934116] [2023-08-26 13:36:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:18,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:19,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:19,046 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 13:36:19,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:19,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376934116] [2023-08-26 13:36:19,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376934116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:19,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:19,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:36:19,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59707332] [2023-08-26 13:36:19,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:19,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:36:19,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:19,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:36:19,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:36:19,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 265 [2023-08-26 13:36:19,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 13:36:19,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:19,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 265 [2023-08-26 13:36:19,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:19,234 INFO L124 PetriNetUnfolderBase]: 2210/2753 cut-off events. [2023-08-26 13:36:19,234 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:36:19,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5523 conditions, 2753 events. 2210/2753 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9573 event pairs, 1028 based on Foata normal form. 0/1331 useless extension candidates. Maximal degree in co-relation 5519. Up to 2723 conditions per place. [2023-08-26 13:36:19,250 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 30 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-26 13:36:19,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 35 transitions, 144 flow [2023-08-26 13:36:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:19,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-26 13:36:19,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075471698113208 [2023-08-26 13:36:19,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-26 13:36:19,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-26 13:36:19,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:19,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-26 13:36:19,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 13:36:19,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:19,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:19,256 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 86 flow. Second operand 3 states and 324 transitions. [2023-08-26 13:36:19,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 35 transitions, 144 flow [2023-08-26 13:36:19,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:19,257 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 83 flow [2023-08-26 13:36:19,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2023-08-26 13:36:19,258 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -12 predicate places. [2023-08-26 13:36:19,258 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 83 flow [2023-08-26 13:36:19,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 13:36:19,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:19,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:36:19,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:36:19,259 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:19,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1783395390, now seen corresponding path program 1 times [2023-08-26 13:36:19,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:19,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546685776] [2023-08-26 13:36:19,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:19,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:19,309 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 13:36:19,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546685776] [2023-08-26 13:36:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546685776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:19,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:19,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:36:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929365660] [2023-08-26 13:36:19,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:19,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:36:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:36:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:36:19,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 265 [2023-08-26 13:36:19,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 13:36:19,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:19,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 265 [2023-08-26 13:36:19,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:19,463 INFO L124 PetriNetUnfolderBase]: 2107/2620 cut-off events. [2023-08-26 13:36:19,464 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:36:19,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5258 conditions, 2620 events. 2107/2620 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8988 event pairs, 981 based on Foata normal form. 0/1284 useless extension candidates. Maximal degree in co-relation 5254. Up to 2590 conditions per place. [2023-08-26 13:36:19,477 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 28 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 13:36:19,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 33 transitions, 137 flow [2023-08-26 13:36:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:19,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-26 13:36:19,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42012578616352203 [2023-08-26 13:36:19,479 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-26 13:36:19,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-26 13:36:19,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:19,480 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-26 13:36:19,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 13:36:19,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:19,482 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:19,483 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 83 flow. Second operand 3 states and 334 transitions. [2023-08-26 13:36:19,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 33 transitions, 137 flow [2023-08-26 13:36:19,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:19,484 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 80 flow [2023-08-26 13:36:19,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-26 13:36:19,485 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -13 predicate places. [2023-08-26 13:36:19,485 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 80 flow [2023-08-26 13:36:19,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 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 13:36:19,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:19,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:36:19,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:36:19,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:19,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:19,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1783395392, now seen corresponding path program 1 times [2023-08-26 13:36:19,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:19,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445025115] [2023-08-26 13:36:19,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:19,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:19,547 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 13:36:19,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445025115] [2023-08-26 13:36:19,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445025115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:19,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:19,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:36:19,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593881892] [2023-08-26 13:36:19,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:19,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:36:19,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:36:19,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:36:19,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 265 [2023-08-26 13:36:19,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 13:36:19,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:19,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 265 [2023-08-26 13:36:19,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:19,717 INFO L124 PetriNetUnfolderBase]: 2004/2487 cut-off events. [2023-08-26 13:36:19,717 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:36:19,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4993 conditions, 2487 events. 2004/2487 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8442 event pairs, 934 based on Foata normal form. 0/1237 useless extension candidates. Maximal degree in co-relation 4989. Up to 2457 conditions per place. [2023-08-26 13:36:19,733 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 26 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-26 13:36:19,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 130 flow [2023-08-26 13:36:19,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-26 13:36:19,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025157232704403 [2023-08-26 13:36:19,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-26 13:36:19,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-26 13:36:19,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:19,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-26 13:36:19,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 13:36:19,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:19,739 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:19,739 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 80 flow. Second operand 3 states and 320 transitions. [2023-08-26 13:36:19,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 130 flow [2023-08-26 13:36:19,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:19,741 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 77 flow [2023-08-26 13:36:19,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-08-26 13:36:19,742 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 13:36:19,743 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 77 flow [2023-08-26 13:36:19,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 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 13:36:19,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:19,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:36:19,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:36:19,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:19,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash -151006053, now seen corresponding path program 1 times [2023-08-26 13:36:19,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:19,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487127686] [2023-08-26 13:36:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:19,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:20,020 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 13:36:20,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:20,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487127686] [2023-08-26 13:36:20,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487127686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:20,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:20,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:36:20,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20712267] [2023-08-26 13:36:20,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:20,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:20,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:20,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:20,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:20,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 265 [2023-08-26 13:36:20,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 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 13:36:20,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:20,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 265 [2023-08-26 13:36:20,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:20,155 INFO L124 PetriNetUnfolderBase]: 1590/1992 cut-off events. [2023-08-26 13:36:20,155 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:36:20,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4004 conditions, 1992 events. 1590/1992 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 6638 event pairs, 736 based on Foata normal form. 0/1039 useless extension candidates. Maximal degree in co-relation 4000. Up to 1962 conditions per place. [2023-08-26 13:36:20,165 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 25 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 13:36:20,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 30 transitions, 127 flow [2023-08-26 13:36:20,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:20,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-08-26 13:36:20,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849056603773585 [2023-08-26 13:36:20,167 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-08-26 13:36:20,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-08-26 13:36:20,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:20,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-08-26 13:36:20,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 13:36:20,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:20,169 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:20,169 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 77 flow. Second operand 3 states and 306 transitions. [2023-08-26 13:36:20,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 30 transitions, 127 flow [2023-08-26 13:36:20,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:20,171 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 76 flow [2023-08-26 13:36:20,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2023-08-26 13:36:20,171 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 13:36:20,171 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 76 flow [2023-08-26 13:36:20,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.8) internal successors, (474), 5 states have internal predecessors, (474), 0 states have call successors, (0), 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 13:36:20,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:20,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:36:20,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:36:20,172 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:20,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -151006054, now seen corresponding path program 1 times [2023-08-26 13:36:20,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:20,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693444065] [2023-08-26 13:36:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:20,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:20,272 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 13:36:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693444065] [2023-08-26 13:36:20,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693444065] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:20,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:20,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:36:20,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076187322] [2023-08-26 13:36:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:20,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:36:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:36:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:36:20,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 265 [2023-08-26 13:36:20,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 30 transitions, 76 flow. Second operand has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 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 13:36:20,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:20,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 265 [2023-08-26 13:36:20,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:20,378 INFO L124 PetriNetUnfolderBase]: 1176/1497 cut-off events. [2023-08-26 13:36:20,378 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 13:36:20,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3015 conditions, 1497 events. 1176/1497 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4879 event pairs, 538 based on Foata normal form. 0/841 useless extension candidates. Maximal degree in co-relation 3011. Up to 1467 conditions per place. [2023-08-26 13:36:20,385 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 24 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2023-08-26 13:36:20,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 29 transitions, 124 flow [2023-08-26 13:36:20,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:20,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:20,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 290 transitions. [2023-08-26 13:36:20,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36477987421383645 [2023-08-26 13:36:20,387 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 290 transitions. [2023-08-26 13:36:20,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 290 transitions. [2023-08-26 13:36:20,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:20,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 290 transitions. [2023-08-26 13:36:20,388 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 13:36:20,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:20,390 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:20,390 INFO L175 Difference]: Start difference. First operand has 40 places, 30 transitions, 76 flow. Second operand 3 states and 290 transitions. [2023-08-26 13:36:20,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 29 transitions, 124 flow [2023-08-26 13:36:20,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 29 transitions, 123 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:20,391 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 75 flow [2023-08-26 13:36:20,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-26 13:36:20,392 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -14 predicate places. [2023-08-26 13:36:20,392 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 75 flow [2023-08-26 13:36:20,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 0 states have call successors, (0), 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 13:36:20,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:20,392 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 13:36:20,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:36:20,392 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:20,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:20,393 INFO L85 PathProgramCache]: Analyzing trace with hash -2108249569, now seen corresponding path program 1 times [2023-08-26 13:36:20,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:20,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614378270] [2023-08-26 13:36:20,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:20,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:20,482 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 13:36:20,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:20,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614378270] [2023-08-26 13:36:20,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614378270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:20,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:20,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:36:20,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501812044] [2023-08-26 13:36:20,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:20,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:36:20,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:20,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:36:20,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:36:20,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 265 [2023-08-26 13:36:20,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 29 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 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 13:36:20,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:20,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 265 [2023-08-26 13:36:20,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:20,641 INFO L124 PetriNetUnfolderBase]: 1537/1954 cut-off events. [2023-08-26 13:36:20,641 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2023-08-26 13:36:20,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3956 conditions, 1954 events. 1537/1954 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 6391 event pairs, 141 based on Foata normal form. 1/1126 useless extension candidates. Maximal degree in co-relation 3952. Up to 1733 conditions per place. [2023-08-26 13:36:20,651 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 41 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-26 13:36:20,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 51 transitions, 220 flow [2023-08-26 13:36:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:36:20,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:36:20,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-26 13:36:20,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5320754716981132 [2023-08-26 13:36:20,653 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-26 13:36:20,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-26 13:36:20,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:20,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-26 13:36:20,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 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 13:36:20,656 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:20,656 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:36:20,656 INFO L175 Difference]: Start difference. First operand has 40 places, 29 transitions, 75 flow. Second operand 3 states and 423 transitions. [2023-08-26 13:36:20,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 51 transitions, 220 flow [2023-08-26 13:36:20,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 219 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:20,658 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 107 flow [2023-08-26 13:36:20,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-26 13:36:20,658 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -12 predicate places. [2023-08-26 13:36:20,659 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 107 flow [2023-08-26 13:36:20,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 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 13:36:20,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:20,659 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 13:36:20,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:36:20,659 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:20,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:20,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2088145847, now seen corresponding path program 1 times [2023-08-26 13:36:20,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:20,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011872638] [2023-08-26 13:36:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:20,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:20,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:20,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011872638] [2023-08-26 13:36:20,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011872638] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:20,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:20,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:20,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898277016] [2023-08-26 13:36:20,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:20,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:20,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:20,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:20,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:20,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:20,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:20,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:20,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:20,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:21,037 INFO L124 PetriNetUnfolderBase]: 2491/3264 cut-off events. [2023-08-26 13:36:21,037 INFO L125 PetriNetUnfolderBase]: For 928/933 co-relation queries the response was YES. [2023-08-26 13:36:21,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7998 conditions, 3264 events. 2491/3264 cut-off events. For 928/933 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 13537 event pairs, 471 based on Foata normal form. 67/3270 useless extension candidates. Maximal degree in co-relation 7993. Up to 1502 conditions per place. [2023-08-26 13:36:21,053 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 83 selfloop transitions, 6 changer transitions 0/91 dead transitions. [2023-08-26 13:36:21,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 91 transitions, 458 flow [2023-08-26 13:36:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 648 transitions. [2023-08-26 13:36:21,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890566037735849 [2023-08-26 13:36:21,056 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 648 transitions. [2023-08-26 13:36:21,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 648 transitions. [2023-08-26 13:36:21,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:21,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 648 transitions. [2023-08-26 13:36:21,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:36:21,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:21,061 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:21,061 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 107 flow. Second operand 5 states and 648 transitions. [2023-08-26 13:36:21,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 91 transitions, 458 flow [2023-08-26 13:36:21,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 91 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:21,064 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 145 flow [2023-08-26 13:36:21,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-08-26 13:36:21,065 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -6 predicate places. [2023-08-26 13:36:21,065 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 145 flow [2023-08-26 13:36:21,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:21,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:21,066 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 13:36:21,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:36:21,066 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:21,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:21,066 INFO L85 PathProgramCache]: Analyzing trace with hash -38187658, now seen corresponding path program 1 times [2023-08-26 13:36:21,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:21,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704330313] [2023-08-26 13:36:21,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:21,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:21,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:21,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:21,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704330313] [2023-08-26 13:36:21,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704330313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:36:21,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666558637] [2023-08-26 13:36:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:21,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:21,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:36:21,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:36:21,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 13:36:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:21,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:36:21,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:36:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:21,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:36:21,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:21,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666558637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:36:21,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:36:21,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 13:36:21,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382339239] [2023-08-26 13:36:21,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:36:21,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:36:21,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:36:21,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:36:21,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:21,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 145 flow. Second operand has 8 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 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 13:36:21,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:21,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:21,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:21,882 INFO L124 PetriNetUnfolderBase]: 3380/4453 cut-off events. [2023-08-26 13:36:21,883 INFO L125 PetriNetUnfolderBase]: For 4150/4682 co-relation queries the response was YES. [2023-08-26 13:36:21,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12945 conditions, 4453 events. 3380/4453 cut-off events. For 4150/4682 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 19844 event pairs, 775 based on Foata normal form. 620/5016 useless extension candidates. Maximal degree in co-relation 12937. Up to 1664 conditions per place. [2023-08-26 13:36:21,909 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 114 selfloop transitions, 10 changer transitions 0/127 dead transitions. [2023-08-26 13:36:21,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 127 transitions, 741 flow [2023-08-26 13:36:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:36:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:36:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 899 transitions. [2023-08-26 13:36:21,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48463611859838274 [2023-08-26 13:36:21,912 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 899 transitions. [2023-08-26 13:36:21,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 899 transitions. [2023-08-26 13:36:21,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:21,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 899 transitions. [2023-08-26 13:36:21,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 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 13:36:21,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:36:21,918 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:36:21,918 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 145 flow. Second operand 7 states and 899 transitions. [2023-08-26 13:36:21,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 127 transitions, 741 flow [2023-08-26 13:36:21,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 127 transitions, 716 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:21,924 INFO L231 Difference]: Finished difference. Result has 58 places, 44 transitions, 210 flow [2023-08-26 13:36:21,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=58, PETRI_TRANSITIONS=44} [2023-08-26 13:36:21,925 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 4 predicate places. [2023-08-26 13:36:21,925 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 44 transitions, 210 flow [2023-08-26 13:36:21,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 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 13:36:21,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:21,926 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 13:36:21,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 13:36:22,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 13:36:22,132 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:22,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:22,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1849307510, now seen corresponding path program 1 times [2023-08-26 13:36:22,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:22,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629894387] [2023-08-26 13:36:22,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:22,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:22,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:22,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629894387] [2023-08-26 13:36:22,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629894387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:36:22,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557628357] [2023-08-26 13:36:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:22,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:36:22,231 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:36:22,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 13:36:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:22,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:36:22,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:36:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:22,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:36:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557628357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:36:22,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:36:22,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-26 13:36:22,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386824149] [2023-08-26 13:36:22,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:36:22,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 13:36:22,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:22,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 13:36:22,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 13:36:22,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:22,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 44 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 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 13:36:22,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:22,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:22,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:22,974 INFO L124 PetriNetUnfolderBase]: 3487/4661 cut-off events. [2023-08-26 13:36:22,974 INFO L125 PetriNetUnfolderBase]: For 9496/9796 co-relation queries the response was YES. [2023-08-26 13:36:22,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16892 conditions, 4661 events. 3487/4661 cut-off events. For 9496/9796 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 20884 event pairs, 829 based on Foata normal form. 408/4951 useless extension candidates. Maximal degree in co-relation 16879. Up to 1949 conditions per place. [2023-08-26 13:36:23,007 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 130 selfloop transitions, 10 changer transitions 0/144 dead transitions. [2023-08-26 13:36:23,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 144 transitions, 974 flow [2023-08-26 13:36:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:36:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:36:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 901 transitions. [2023-08-26 13:36:23,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-08-26 13:36:23,010 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 901 transitions. [2023-08-26 13:36:23,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 901 transitions. [2023-08-26 13:36:23,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:23,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 901 transitions. [2023-08-26 13:36:23,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.71428571428572) internal successors, (901), 7 states have internal predecessors, (901), 0 states have call successors, (0), 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 13:36:23,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:36:23,016 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:36:23,016 INFO L175 Difference]: Start difference. First operand has 58 places, 44 transitions, 210 flow. Second operand 7 states and 901 transitions. [2023-08-26 13:36:23,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 144 transitions, 974 flow [2023-08-26 13:36:23,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 144 transitions, 927 flow, removed 20 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:23,063 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 270 flow [2023-08-26 13:36:23,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=270, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-26 13:36:23,064 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2023-08-26 13:36:23,064 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 270 flow [2023-08-26 13:36:23,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.75) internal successors, (942), 8 states have internal predecessors, (942), 0 states have call successors, (0), 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 13:36:23,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:23,065 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 13:36:23,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 13:36:23,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-26 13:36:23,270 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:23,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:23,271 INFO L85 PathProgramCache]: Analyzing trace with hash 861264108, now seen corresponding path program 2 times [2023-08-26 13:36:23,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:23,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021843764] [2023-08-26 13:36:23,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:23,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:23,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:23,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021843764] [2023-08-26 13:36:23,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021843764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:23,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:23,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:23,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221410374] [2023-08-26 13:36:23,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:23,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:23,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:23,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:23,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:23,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:23,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:23,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:23,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:23,988 INFO L124 PetriNetUnfolderBase]: 5023/6699 cut-off events. [2023-08-26 13:36:23,988 INFO L125 PetriNetUnfolderBase]: For 21127/21676 co-relation queries the response was YES. [2023-08-26 13:36:24,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26807 conditions, 6699 events. 5023/6699 cut-off events. For 21127/21676 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31471 event pairs, 1277 based on Foata normal form. 584/7145 useless extension candidates. Maximal degree in co-relation 26790. Up to 3534 conditions per place. [2023-08-26 13:36:24,033 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 102 selfloop transitions, 12 changer transitions 0/118 dead transitions. [2023-08-26 13:36:24,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 118 transitions, 853 flow [2023-08-26 13:36:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 640 transitions. [2023-08-26 13:36:24,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2023-08-26 13:36:24,035 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 640 transitions. [2023-08-26 13:36:24,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 640 transitions. [2023-08-26 13:36:24,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:24,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 640 transitions. [2023-08-26 13:36:24,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 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 13:36:24,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:24,040 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:24,040 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 270 flow. Second operand 5 states and 640 transitions. [2023-08-26 13:36:24,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 118 transitions, 853 flow [2023-08-26 13:36:24,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 821 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 13:36:24,091 INFO L231 Difference]: Finished difference. Result has 72 places, 53 transitions, 332 flow [2023-08-26 13:36:24,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=72, PETRI_TRANSITIONS=53} [2023-08-26 13:36:24,091 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 18 predicate places. [2023-08-26 13:36:24,092 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 53 transitions, 332 flow [2023-08-26 13:36:24,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:24,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:24,092 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 13:36:24,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 13:36:24,092 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:24,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:24,093 INFO L85 PathProgramCache]: Analyzing trace with hash -888955976, now seen corresponding path program 2 times [2023-08-26 13:36:24,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:24,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950202528] [2023-08-26 13:36:24,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:24,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:24,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:24,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950202528] [2023-08-26 13:36:24,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950202528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:36:24,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026727576] [2023-08-26 13:36:24,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:36:24,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:24,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:36:24,193 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:36:24,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 13:36:24,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:36:24,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:36:24,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:36:24,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:36:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:24,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:36:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:24,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026727576] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:36:24,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:36:24,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 13:36:24,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527266562] [2023-08-26 13:36:24,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:36:24,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:36:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:36:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:36:24,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:24,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 53 transitions, 332 flow. Second operand has 10 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 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 13:36:24,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:24,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:24,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:25,288 INFO L124 PetriNetUnfolderBase]: 6451/8542 cut-off events. [2023-08-26 13:36:25,289 INFO L125 PetriNetUnfolderBase]: For 42843/44373 co-relation queries the response was YES. [2023-08-26 13:36:25,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37426 conditions, 8542 events. 6451/8542 cut-off events. For 42843/44373 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 40374 event pairs, 1716 based on Foata normal form. 1688/10017 useless extension candidates. Maximal degree in co-relation 37406. Up to 4314 conditions per place. [2023-08-26 13:36:25,361 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 194 selfloop transitions, 22 changer transitions 0/222 dead transitions. [2023-08-26 13:36:25,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 222 transitions, 2008 flow [2023-08-26 13:36:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:36:25,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:36:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1264 transitions. [2023-08-26 13:36:25,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769811320754717 [2023-08-26 13:36:25,365 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1264 transitions. [2023-08-26 13:36:25,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1264 transitions. [2023-08-26 13:36:25,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:25,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1264 transitions. [2023-08-26 13:36:25,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.4) internal successors, (1264), 10 states have internal predecessors, (1264), 0 states have call successors, (0), 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 13:36:25,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 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 13:36:25,373 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 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 13:36:25,373 INFO L175 Difference]: Start difference. First operand has 72 places, 53 transitions, 332 flow. Second operand 10 states and 1264 transitions. [2023-08-26 13:36:25,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 222 transitions, 2008 flow [2023-08-26 13:36:25,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 222 transitions, 1842 flow, removed 66 selfloop flow, removed 1 redundant places. [2023-08-26 13:36:25,456 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 485 flow [2023-08-26 13:36:25,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=485, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2023-08-26 13:36:25,457 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 32 predicate places. [2023-08-26 13:36:25,457 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 485 flow [2023-08-26 13:36:25,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 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 13:36:25,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:25,458 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 13:36:25,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 13:36:25,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:25,664 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:25,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:25,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1250683940, now seen corresponding path program 3 times [2023-08-26 13:36:25,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:25,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326596660] [2023-08-26 13:36:25,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:25,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:25,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:25,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326596660] [2023-08-26 13:36:25,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326596660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:36:25,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198782929] [2023-08-26 13:36:25,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:36:25,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:25,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:36:25,747 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:36:25,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 13:36:25,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:36:25,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:36:25,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:36:25,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:36:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:25,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:36:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:25,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198782929] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:36:25,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:36:25,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 13:36:25,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092241261] [2023-08-26 13:36:25,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:36:25,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:36:25,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:36:25,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:36:25,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:25,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 485 flow. Second operand has 10 states, 10 states have (on average 117.7) internal successors, (1177), 10 states have internal predecessors, (1177), 0 states have call successors, (0), 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 13:36:25,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:25,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:25,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:27,178 INFO L124 PetriNetUnfolderBase]: 8995/11662 cut-off events. [2023-08-26 13:36:27,178 INFO L125 PetriNetUnfolderBase]: For 72036/74546 co-relation queries the response was YES. [2023-08-26 13:36:27,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58227 conditions, 11662 events. 8995/11662 cut-off events. For 72036/74546 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 55095 event pairs, 2056 based on Foata normal form. 785/12096 useless extension candidates. Maximal degree in co-relation 58201. Up to 7124 conditions per place. [2023-08-26 13:36:27,272 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 269 selfloop transitions, 24 changer transitions 0/298 dead transitions. [2023-08-26 13:36:27,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 298 transitions, 2933 flow [2023-08-26 13:36:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:36:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:36:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1264 transitions. [2023-08-26 13:36:27,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769811320754717 [2023-08-26 13:36:27,276 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1264 transitions. [2023-08-26 13:36:27,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1264 transitions. [2023-08-26 13:36:27,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:27,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1264 transitions. [2023-08-26 13:36:27,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 126.4) internal successors, (1264), 10 states have internal predecessors, (1264), 0 states have call successors, (0), 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 13:36:27,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 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 13:36:27,381 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 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 13:36:27,381 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 485 flow. Second operand 10 states and 1264 transitions. [2023-08-26 13:36:27,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 298 transitions, 2933 flow [2023-08-26 13:36:27,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 298 transitions, 2501 flow, removed 119 selfloop flow, removed 4 redundant places. [2023-08-26 13:36:27,633 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 642 flow [2023-08-26 13:36:27,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=642, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-08-26 13:36:27,634 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2023-08-26 13:36:27,634 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 642 flow [2023-08-26 13:36:27,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.7) internal successors, (1177), 10 states have internal predecessors, (1177), 0 states have call successors, (0), 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 13:36:27,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:27,635 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 13:36:27,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-26 13:36:27,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 13:36:27,841 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:27,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:27,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1217116808, now seen corresponding path program 4 times [2023-08-26 13:36:27,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:27,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558450881] [2023-08-26 13:36:27,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:27,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:27,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:27,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558450881] [2023-08-26 13:36:27,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558450881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:36:27,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236710401] [2023-08-26 13:36:27,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:36:27,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:27,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:36:27,925 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:36:27,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 13:36:28,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:36:28,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:36:28,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:36:28,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:36:28,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:28,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:36:28,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:28,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236710401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:36:28,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:36:28,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 13:36:28,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659624034] [2023-08-26 13:36:28,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:36:28,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:36:28,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:28,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:36:28,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:36:28,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:28,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 642 flow. Second operand has 10 states, 10 states have (on average 117.8) internal successors, (1178), 10 states have internal predecessors, (1178), 0 states have call successors, (0), 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 13:36:28,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:28,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:28,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:29,274 INFO L124 PetriNetUnfolderBase]: 8756/11434 cut-off events. [2023-08-26 13:36:29,274 INFO L125 PetriNetUnfolderBase]: For 80006/81460 co-relation queries the response was YES. [2023-08-26 13:36:29,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58208 conditions, 11434 events. 8756/11434 cut-off events. For 80006/81460 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 54536 event pairs, 1811 based on Foata normal form. 759/11849 useless extension candidates. Maximal degree in co-relation 58176. Up to 7453 conditions per place. [2023-08-26 13:36:29,364 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 166 selfloop transitions, 28 changer transitions 0/199 dead transitions. [2023-08-26 13:36:29,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 199 transitions, 1836 flow [2023-08-26 13:36:29,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:36:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:36:29,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 762 transitions. [2023-08-26 13:36:29,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 13:36:29,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 762 transitions. [2023-08-26 13:36:29,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 762 transitions. [2023-08-26 13:36:29,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:29,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 762 transitions. [2023-08-26 13:36:29,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.0) internal successors, (762), 6 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 13:36:29,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 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 13:36:29,371 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 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 13:36:29,371 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 642 flow. Second operand 6 states and 762 transitions. [2023-08-26 13:36:29,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 199 transitions, 1836 flow [2023-08-26 13:36:29,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 199 transitions, 1750 flow, removed 22 selfloop flow, removed 4 redundant places. [2023-08-26 13:36:29,631 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 779 flow [2023-08-26 13:36:29,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=566, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=779, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2023-08-26 13:36:29,631 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 47 predicate places. [2023-08-26 13:36:29,632 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 779 flow [2023-08-26 13:36:29,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.8) internal successors, (1178), 10 states have internal predecessors, (1178), 0 states have call successors, (0), 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 13:36:29,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:29,633 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 13:36:29,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-26 13:36:29,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 13:36:29,838 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:29,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1711543786, now seen corresponding path program 5 times [2023-08-26 13:36:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:29,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787250268] [2023-08-26 13:36:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:29,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787250268] [2023-08-26 13:36:29,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787250268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:29,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:29,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:29,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683157201] [2023-08-26 13:36:29,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:29,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:29,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:29,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:29,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:29,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:29,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 779 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:29,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:29,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:29,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:31,108 INFO L124 PetriNetUnfolderBase]: 9005/11722 cut-off events. [2023-08-26 13:36:31,109 INFO L125 PetriNetUnfolderBase]: For 81408/83122 co-relation queries the response was YES. [2023-08-26 13:36:31,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61042 conditions, 11722 events. 9005/11722 cut-off events. For 81408/83122 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 56072 event pairs, 2815 based on Foata normal form. 720/12110 useless extension candidates. Maximal degree in co-relation 61007. Up to 9874 conditions per place. [2023-08-26 13:36:31,180 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 152 selfloop transitions, 18 changer transitions 0/175 dead transitions. [2023-08-26 13:36:31,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 175 transitions, 1656 flow [2023-08-26 13:36:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:31,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-26 13:36:31,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47773584905660377 [2023-08-26 13:36:31,183 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-26 13:36:31,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-26 13:36:31,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:31,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-26 13:36:31,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 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 13:36:31,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:31,187 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:31,187 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 779 flow. Second operand 5 states and 633 transitions. [2023-08-26 13:36:31,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 175 transitions, 1656 flow [2023-08-26 13:36:31,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 175 transitions, 1550 flow, removed 30 selfloop flow, removed 2 redundant places. [2023-08-26 13:36:31,451 INFO L231 Difference]: Finished difference. Result has 103 places, 92 transitions, 720 flow [2023-08-26 13:36:31,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=720, PETRI_PLACES=103, PETRI_TRANSITIONS=92} [2023-08-26 13:36:31,451 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2023-08-26 13:36:31,451 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 92 transitions, 720 flow [2023-08-26 13:36:31,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:31,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:31,452 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 13:36:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 13:36:31,452 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:31,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash -955109672, now seen corresponding path program 3 times [2023-08-26 13:36:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:31,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726253175] [2023-08-26 13:36:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:31,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:31,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:31,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726253175] [2023-08-26 13:36:31,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726253175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:31,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:31,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:31,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556883256] [2023-08-26 13:36:31,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:31,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:31,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:31,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:31,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:31,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:31,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 92 transitions, 720 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:31,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:31,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:31,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:32,475 INFO L124 PetriNetUnfolderBase]: 8399/11102 cut-off events. [2023-08-26 13:36:32,476 INFO L125 PetriNetUnfolderBase]: For 75501/79567 co-relation queries the response was YES. [2023-08-26 13:36:32,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54858 conditions, 11102 events. 8399/11102 cut-off events. For 75501/79567 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 52717 event pairs, 2344 based on Foata normal form. 1505/12523 useless extension candidates. Maximal degree in co-relation 54823. Up to 8986 conditions per place. [2023-08-26 13:36:32,549 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 188 selfloop transitions, 12 changer transitions 5/213 dead transitions. [2023-08-26 13:36:32,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 213 transitions, 2220 flow [2023-08-26 13:36:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:32,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-26 13:36:32,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47773584905660377 [2023-08-26 13:36:32,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-26 13:36:32,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-26 13:36:32,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:32,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-26 13:36:32,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 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 13:36:32,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:32,556 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:32,556 INFO L175 Difference]: Start difference. First operand has 103 places, 92 transitions, 720 flow. Second operand 5 states and 633 transitions. [2023-08-26 13:36:32,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 213 transitions, 2220 flow [2023-08-26 13:36:32,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 213 transitions, 2096 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 13:36:32,782 INFO L231 Difference]: Finished difference. Result has 104 places, 93 transitions, 709 flow [2023-08-26 13:36:32,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=680, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=709, PETRI_PLACES=104, PETRI_TRANSITIONS=93} [2023-08-26 13:36:32,783 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2023-08-26 13:36:32,783 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 93 transitions, 709 flow [2023-08-26 13:36:32,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:32,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:32,784 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 13:36:32,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 13:36:32,784 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:32,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:32,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1440158920, now seen corresponding path program 4 times [2023-08-26 13:36:32,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:32,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333287135] [2023-08-26 13:36:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:32,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:32,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:32,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:32,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333287135] [2023-08-26 13:36:32,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333287135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:36:32,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862542121] [2023-08-26 13:36:32,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:36:32,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:32,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:36:32,857 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:36:32,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 13:36:32,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:36:32,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:36:32,956 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:36:32,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:36:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:33,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:36:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:33,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862542121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:36:33,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:36:33,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 13:36:33,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961197648] [2023-08-26 13:36:33,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:36:33,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:36:33,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:33,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:36:33,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:36:33,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:33,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 709 flow. Second operand has 10 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 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 13:36:33,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:33,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:33,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:34,285 INFO L124 PetriNetUnfolderBase]: 9861/12958 cut-off events. [2023-08-26 13:36:34,285 INFO L125 PetriNetUnfolderBase]: For 90030/94369 co-relation queries the response was YES. [2023-08-26 13:36:34,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65448 conditions, 12958 events. 9861/12958 cut-off events. For 90030/94369 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 62600 event pairs, 2635 based on Foata normal form. 1879/14756 useless extension candidates. Maximal degree in co-relation 65413. Up to 8770 conditions per place. [2023-08-26 13:36:34,358 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 228 selfloop transitions, 26 changer transitions 0/262 dead transitions. [2023-08-26 13:36:34,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 262 transitions, 2633 flow [2023-08-26 13:36:34,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:36:34,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:36:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 762 transitions. [2023-08-26 13:36:34,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 13:36:34,360 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 762 transitions. [2023-08-26 13:36:34,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 762 transitions. [2023-08-26 13:36:34,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:34,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 762 transitions. [2023-08-26 13:36:34,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.0) internal successors, (762), 6 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 13:36:34,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 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 13:36:34,364 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 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 13:36:34,364 INFO L175 Difference]: Start difference. First operand has 104 places, 93 transitions, 709 flow. Second operand 6 states and 762 transitions. [2023-08-26 13:36:34,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 262 transitions, 2633 flow [2023-08-26 13:36:34,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 262 transitions, 2601 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 13:36:34,559 INFO L231 Difference]: Finished difference. Result has 109 places, 105 transitions, 896 flow [2023-08-26 13:36:34,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=896, PETRI_PLACES=109, PETRI_TRANSITIONS=105} [2023-08-26 13:36:34,560 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 55 predicate places. [2023-08-26 13:36:34,560 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 105 transitions, 896 flow [2023-08-26 13:36:34,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 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 13:36:34,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:34,561 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 13:36:34,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 13:36:34,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:34,766 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:34,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:34,766 INFO L85 PathProgramCache]: Analyzing trace with hash -649437181, now seen corresponding path program 2 times [2023-08-26 13:36:34,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:34,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023760395] [2023-08-26 13:36:34,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:34,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:34,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:34,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:34,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023760395] [2023-08-26 13:36:34,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023760395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:34,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:34,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:34,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930231226] [2023-08-26 13:36:34,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:34,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:34,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:34,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:34,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:34,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:34,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 105 transitions, 896 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:34,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:34,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:34,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:36,195 INFO L124 PetriNetUnfolderBase]: 10510/13762 cut-off events. [2023-08-26 13:36:36,195 INFO L125 PetriNetUnfolderBase]: For 105642/109167 co-relation queries the response was YES. [2023-08-26 13:36:36,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76019 conditions, 13762 events. 10510/13762 cut-off events. For 105642/109167 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 68782 event pairs, 2681 based on Foata normal form. 1377/14840 useless extension candidates. Maximal degree in co-relation 75981. Up to 11387 conditions per place. [2023-08-26 13:36:36,279 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 195 selfloop transitions, 19 changer transitions 0/220 dead transitions. [2023-08-26 13:36:36,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 220 transitions, 2361 flow [2023-08-26 13:36:36,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:36,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:36,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-26 13:36:36,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 13:36:36,281 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-26 13:36:36,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-26 13:36:36,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:36,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-26 13:36:36,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 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 13:36:36,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:36,285 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:36,285 INFO L175 Difference]: Start difference. First operand has 109 places, 105 transitions, 896 flow. Second operand 5 states and 635 transitions. [2023-08-26 13:36:36,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 220 transitions, 2361 flow [2023-08-26 13:36:36,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 220 transitions, 2085 flow, removed 138 selfloop flow, removed 0 redundant places. [2023-08-26 13:36:36,808 INFO L231 Difference]: Finished difference. Result has 113 places, 106 transitions, 871 flow [2023-08-26 13:36:36,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=871, PETRI_PLACES=113, PETRI_TRANSITIONS=106} [2023-08-26 13:36:36,809 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 59 predicate places. [2023-08-26 13:36:36,809 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 106 transitions, 871 flow [2023-08-26 13:36:36,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:36,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:36,809 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 13:36:36,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 13:36:36,810 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:36,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:36,810 INFO L85 PathProgramCache]: Analyzing trace with hash 423940640, now seen corresponding path program 5 times [2023-08-26 13:36:36,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:36,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465606885] [2023-08-26 13:36:36,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:36,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:36,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:36,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:36,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465606885] [2023-08-26 13:36:36,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465606885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:36,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:36,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:36,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858826100] [2023-08-26 13:36:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:36,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:36,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:36,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:36,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 106 transitions, 871 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:36,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:36,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:36,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:38,292 INFO L124 PetriNetUnfolderBase]: 11668/15423 cut-off events. [2023-08-26 13:36:38,293 INFO L125 PetriNetUnfolderBase]: For 96127/101506 co-relation queries the response was YES. [2023-08-26 13:36:38,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76914 conditions, 15423 events. 11668/15423 cut-off events. For 96127/101506 co-relation queries the response was YES. Maximal size of possible extension queue 830. Compared 78523 event pairs, 2706 based on Foata normal form. 2157/17499 useless extension candidates. Maximal degree in co-relation 76875. Up to 8358 conditions per place. [2023-08-26 13:36:38,387 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 209 selfloop transitions, 23 changer transitions 5/245 dead transitions. [2023-08-26 13:36:38,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 245 transitions, 2561 flow [2023-08-26 13:36:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 638 transitions. [2023-08-26 13:36:38,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48150943396226414 [2023-08-26 13:36:38,389 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 638 transitions. [2023-08-26 13:36:38,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 638 transitions. [2023-08-26 13:36:38,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:38,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 638 transitions. [2023-08-26 13:36:38,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 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 13:36:38,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:38,393 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:38,393 INFO L175 Difference]: Start difference. First operand has 113 places, 106 transitions, 871 flow. Second operand 5 states and 638 transitions. [2023-08-26 13:36:38,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 245 transitions, 2561 flow [2023-08-26 13:36:38,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 245 transitions, 2473 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-26 13:36:38,629 INFO L231 Difference]: Finished difference. Result has 117 places, 108 transitions, 920 flow [2023-08-26 13:36:38,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=920, PETRI_PLACES=117, PETRI_TRANSITIONS=108} [2023-08-26 13:36:38,629 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2023-08-26 13:36:38,630 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 108 transitions, 920 flow [2023-08-26 13:36:38,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:38,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:38,630 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 13:36:38,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 13:36:38,630 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:38,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:38,631 INFO L85 PathProgramCache]: Analyzing trace with hash -49652703, now seen corresponding path program 3 times [2023-08-26 13:36:38,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:38,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943916210] [2023-08-26 13:36:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:38,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:38,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:38,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943916210] [2023-08-26 13:36:38,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943916210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:38,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135108813] [2023-08-26 13:36:38,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:38,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:38,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:38,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:38,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 108 transitions, 920 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:38,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:38,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:38,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:40,226 INFO L124 PetriNetUnfolderBase]: 11967/15844 cut-off events. [2023-08-26 13:36:40,226 INFO L125 PetriNetUnfolderBase]: For 99375/104059 co-relation queries the response was YES. [2023-08-26 13:36:40,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81852 conditions, 15844 events. 11967/15844 cut-off events. For 99375/104059 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 83205 event pairs, 1719 based on Foata normal form. 1813/17477 useless extension candidates. Maximal degree in co-relation 81811. Up to 7009 conditions per place. [2023-08-26 13:36:40,327 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 205 selfloop transitions, 25 changer transitions 0/237 dead transitions. [2023-08-26 13:36:40,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 237 transitions, 2433 flow [2023-08-26 13:36:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 642 transitions. [2023-08-26 13:36:40,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48452830188679247 [2023-08-26 13:36:40,328 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 642 transitions. [2023-08-26 13:36:40,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 642 transitions. [2023-08-26 13:36:40,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:40,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 642 transitions. [2023-08-26 13:36:40,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 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 13:36:40,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:40,330 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:40,330 INFO L175 Difference]: Start difference. First operand has 117 places, 108 transitions, 920 flow. Second operand 5 states and 642 transitions. [2023-08-26 13:36:40,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 237 transitions, 2433 flow [2023-08-26 13:36:40,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 237 transitions, 2303 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-26 13:36:40,592 INFO L231 Difference]: Finished difference. Result has 121 places, 110 transitions, 973 flow [2023-08-26 13:36:40,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=973, PETRI_PLACES=121, PETRI_TRANSITIONS=110} [2023-08-26 13:36:40,592 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 67 predicate places. [2023-08-26 13:36:40,592 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 110 transitions, 973 flow [2023-08-26 13:36:40,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:40,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:40,593 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 13:36:40,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 13:36:40,593 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:40,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:40,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1969234176, now seen corresponding path program 1 times [2023-08-26 13:36:40,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46632135] [2023-08-26 13:36:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:40,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:40,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:40,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46632135] [2023-08-26 13:36:40,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46632135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:40,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:40,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:40,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461124677] [2023-08-26 13:36:40,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:40,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:40,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:40,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:40,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:40,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:40,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 110 transitions, 973 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:40,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:40,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:40,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:42,321 INFO L124 PetriNetUnfolderBase]: 12155/16105 cut-off events. [2023-08-26 13:36:42,321 INFO L125 PetriNetUnfolderBase]: For 125812/132228 co-relation queries the response was YES. [2023-08-26 13:36:42,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83056 conditions, 16105 events. 12155/16105 cut-off events. For 125812/132228 co-relation queries the response was YES. Maximal size of possible extension queue 852. Compared 82900 event pairs, 1955 based on Foata normal form. 2620/18622 useless extension candidates. Maximal degree in co-relation 83013. Up to 7152 conditions per place. [2023-08-26 13:36:42,442 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 214 selfloop transitions, 23 changer transitions 0/246 dead transitions. [2023-08-26 13:36:42,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 246 transitions, 2744 flow [2023-08-26 13:36:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:42,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:42,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 640 transitions. [2023-08-26 13:36:42,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830188679245283 [2023-08-26 13:36:42,445 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 640 transitions. [2023-08-26 13:36:42,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 640 transitions. [2023-08-26 13:36:42,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:42,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 640 transitions. [2023-08-26 13:36:42,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 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 13:36:42,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:42,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:42,448 INFO L175 Difference]: Start difference. First operand has 121 places, 110 transitions, 973 flow. Second operand 5 states and 640 transitions. [2023-08-26 13:36:42,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 246 transitions, 2744 flow [2023-08-26 13:36:43,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 246 transitions, 2632 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-08-26 13:36:43,018 INFO L231 Difference]: Finished difference. Result has 125 places, 112 transitions, 1023 flow [2023-08-26 13:36:43,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1023, PETRI_PLACES=125, PETRI_TRANSITIONS=112} [2023-08-26 13:36:43,019 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 71 predicate places. [2023-08-26 13:36:43,019 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 112 transitions, 1023 flow [2023-08-26 13:36:43,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:43,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:43,019 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 13:36:43,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 13:36:43,019 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:43,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1523404586, now seen corresponding path program 2 times [2023-08-26 13:36:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:43,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182444960] [2023-08-26 13:36:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:43,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:43,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182444960] [2023-08-26 13:36:43,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182444960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:43,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:43,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:43,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585942638] [2023-08-26 13:36:43,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:43,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:43,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:43,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:43,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:43,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 112 transitions, 1023 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:43,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:43,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:43,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:44,814 INFO L124 PetriNetUnfolderBase]: 12422/16479 cut-off events. [2023-08-26 13:36:44,814 INFO L125 PetriNetUnfolderBase]: For 142002/148330 co-relation queries the response was YES. [2023-08-26 13:36:44,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88278 conditions, 16479 events. 12422/16479 cut-off events. For 142002/148330 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 85851 event pairs, 2847 based on Foata normal form. 2671/19081 useless extension candidates. Maximal degree in co-relation 88233. Up to 9613 conditions per place. [2023-08-26 13:36:44,908 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 231 selfloop transitions, 18 changer transitions 5/263 dead transitions. [2023-08-26 13:36:44,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 263 transitions, 2867 flow [2023-08-26 13:36:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 646 transitions. [2023-08-26 13:36:44,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48754716981132074 [2023-08-26 13:36:44,909 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 646 transitions. [2023-08-26 13:36:44,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 646 transitions. [2023-08-26 13:36:44,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:44,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 646 transitions. [2023-08-26 13:36:44,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.2) internal successors, (646), 5 states have internal predecessors, (646), 0 states have call successors, (0), 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 13:36:44,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:44,912 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:44,912 INFO L175 Difference]: Start difference. First operand has 125 places, 112 transitions, 1023 flow. Second operand 5 states and 646 transitions. [2023-08-26 13:36:44,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 263 transitions, 2867 flow [2023-08-26 13:36:45,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 263 transitions, 2823 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 13:36:45,304 INFO L231 Difference]: Finished difference. Result has 129 places, 114 transitions, 1068 flow [2023-08-26 13:36:45,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1068, PETRI_PLACES=129, PETRI_TRANSITIONS=114} [2023-08-26 13:36:45,304 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2023-08-26 13:36:45,304 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 114 transitions, 1068 flow [2023-08-26 13:36:45,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:45,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:45,304 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 13:36:45,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 13:36:45,305 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:45,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash -125081020, now seen corresponding path program 3 times [2023-08-26 13:36:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:45,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197470241] [2023-08-26 13:36:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:45,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:45,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197470241] [2023-08-26 13:36:45,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197470241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:36:45,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769209792] [2023-08-26 13:36:45,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:36:45,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:45,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:36:45,369 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:36:45,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 13:36:45,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:36:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:36:45,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 13:36:45,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:36:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:45,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:36:45,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:45,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769209792] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:36:45,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:36:45,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 13:36:45,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269041250] [2023-08-26 13:36:45,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:36:45,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 13:36:45,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 13:36:45,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-08-26 13:36:45,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:45,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 114 transitions, 1068 flow. Second operand has 10 states, 10 states have (on average 117.3) internal successors, (1173), 10 states have internal predecessors, (1173), 0 states have call successors, (0), 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 13:36:45,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:45,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:45,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:47,479 INFO L124 PetriNetUnfolderBase]: 13009/17245 cut-off events. [2023-08-26 13:36:47,480 INFO L125 PetriNetUnfolderBase]: For 153560/160090 co-relation queries the response was YES. [2023-08-26 13:36:47,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93860 conditions, 17245 events. 13009/17245 cut-off events. For 153560/160090 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 89439 event pairs, 3833 based on Foata normal form. 2817/19972 useless extension candidates. Maximal degree in co-relation 93813. Up to 13074 conditions per place. [2023-08-26 13:36:47,589 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 247 selfloop transitions, 23 changer transitions 0/279 dead transitions. [2023-08-26 13:36:47,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 279 transitions, 3150 flow [2023-08-26 13:36:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:36:47,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:36:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 758 transitions. [2023-08-26 13:36:47,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767295597484277 [2023-08-26 13:36:47,591 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 758 transitions. [2023-08-26 13:36:47,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 758 transitions. [2023-08-26 13:36:47,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:47,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 758 transitions. [2023-08-26 13:36:47,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 126.33333333333333) internal successors, (758), 6 states have internal predecessors, (758), 0 states have call successors, (0), 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 13:36:47,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 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 13:36:47,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 265.0) internal successors, (1855), 7 states have internal predecessors, (1855), 0 states have call successors, (0), 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 13:36:47,595 INFO L175 Difference]: Start difference. First operand has 129 places, 114 transitions, 1068 flow. Second operand 6 states and 758 transitions. [2023-08-26 13:36:47,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 279 transitions, 3150 flow [2023-08-26 13:36:48,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 279 transitions, 3103 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-26 13:36:48,193 INFO L231 Difference]: Finished difference. Result has 133 places, 117 transitions, 1107 flow [2023-08-26 13:36:48,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1107, PETRI_PLACES=133, PETRI_TRANSITIONS=117} [2023-08-26 13:36:48,193 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2023-08-26 13:36:48,194 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 117 transitions, 1107 flow [2023-08-26 13:36:48,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 117.3) internal successors, (1173), 10 states have internal predecessors, (1173), 0 states have call successors, (0), 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 13:36:48,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:48,194 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 13:36:48,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-26 13:36:48,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:36:48,395 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:48,395 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:48,395 INFO L85 PathProgramCache]: Analyzing trace with hash 23300422, now seen corresponding path program 4 times [2023-08-26 13:36:48,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:48,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352572707] [2023-08-26 13:36:48,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:48,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:48,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:48,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:48,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352572707] [2023-08-26 13:36:48,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352572707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:48,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:48,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:48,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667852710] [2023-08-26 13:36:48,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:48,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:48,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:48,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:48,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:48,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:48,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 117 transitions, 1107 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:48,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:48,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:48,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:50,197 INFO L124 PetriNetUnfolderBase]: 13275/17631 cut-off events. [2023-08-26 13:36:50,197 INFO L125 PetriNetUnfolderBase]: For 154014/160710 co-relation queries the response was YES. [2023-08-26 13:36:50,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97313 conditions, 17631 events. 13275/17631 cut-off events. For 154014/160710 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 92054 event pairs, 3799 based on Foata normal form. 2833/20374 useless extension candidates. Maximal degree in co-relation 97265. Up to 13108 conditions per place. [2023-08-26 13:36:50,324 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 210 selfloop transitions, 23 changer transitions 5/247 dead transitions. [2023-08-26 13:36:50,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 247 transitions, 2766 flow [2023-08-26 13:36:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-26 13:36:50,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807547169811321 [2023-08-26 13:36:50,326 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-26 13:36:50,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-26 13:36:50,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:50,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-26 13:36:50,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 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 13:36:50,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:50,329 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:50,329 INFO L175 Difference]: Start difference. First operand has 133 places, 117 transitions, 1107 flow. Second operand 5 states and 637 transitions. [2023-08-26 13:36:50,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 247 transitions, 2766 flow [2023-08-26 13:36:51,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 247 transitions, 2729 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-26 13:36:51,223 INFO L231 Difference]: Finished difference. Result has 136 places, 118 transitions, 1143 flow [2023-08-26 13:36:51,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1143, PETRI_PLACES=136, PETRI_TRANSITIONS=118} [2023-08-26 13:36:51,224 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 82 predicate places. [2023-08-26 13:36:51,224 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 118 transitions, 1143 flow [2023-08-26 13:36:51,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:51,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:51,224 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 13:36:51,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 13:36:51,224 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:51,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1834484034, now seen corresponding path program 6 times [2023-08-26 13:36:51,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:51,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243069257] [2023-08-26 13:36:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:51,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:51,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243069257] [2023-08-26 13:36:51,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243069257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:51,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:51,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:51,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309778062] [2023-08-26 13:36:51,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:51,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:51,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:51,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:51,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:51,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:51,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 118 transitions, 1143 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:51,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:51,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:51,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:53,233 INFO L124 PetriNetUnfolderBase]: 12749/16893 cut-off events. [2023-08-26 13:36:53,233 INFO L125 PetriNetUnfolderBase]: For 158959/165280 co-relation queries the response was YES. [2023-08-26 13:36:53,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94164 conditions, 16893 events. 12749/16893 cut-off events. For 158959/165280 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 87145 event pairs, 3509 based on Foata normal form. 2666/19456 useless extension candidates. Maximal degree in co-relation 94115. Up to 11635 conditions per place. [2023-08-26 13:36:53,333 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 200 selfloop transitions, 29 changer transitions 5/243 dead transitions. [2023-08-26 13:36:53,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 243 transitions, 2777 flow [2023-08-26 13:36:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-26 13:36:53,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47773584905660377 [2023-08-26 13:36:53,334 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-26 13:36:53,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-26 13:36:53,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:53,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-26 13:36:53,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 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 13:36:53,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:53,337 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:53,337 INFO L175 Difference]: Start difference. First operand has 136 places, 118 transitions, 1143 flow. Second operand 5 states and 633 transitions. [2023-08-26 13:36:53,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 243 transitions, 2777 flow [2023-08-26 13:36:53,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 243 transitions, 2719 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-26 13:36:53,975 INFO L231 Difference]: Finished difference. Result has 138 places, 119 transitions, 1167 flow [2023-08-26 13:36:53,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1087, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1167, PETRI_PLACES=138, PETRI_TRANSITIONS=119} [2023-08-26 13:36:53,975 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2023-08-26 13:36:53,975 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 119 transitions, 1167 flow [2023-08-26 13:36:53,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:53,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:53,976 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 13:36:53,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 13:36:53,976 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:53,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:53,976 INFO L85 PathProgramCache]: Analyzing trace with hash -800415612, now seen corresponding path program 5 times [2023-08-26 13:36:53,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:53,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523024090] [2023-08-26 13:36:53,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:53,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:54,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:54,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523024090] [2023-08-26 13:36:54,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523024090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:54,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:54,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:54,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476709064] [2023-08-26 13:36:54,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:54,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:54,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:54,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:54,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:54,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:54,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 119 transitions, 1167 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:54,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:54,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:54,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:55,829 INFO L124 PetriNetUnfolderBase]: 12577/16721 cut-off events. [2023-08-26 13:36:55,830 INFO L125 PetriNetUnfolderBase]: For 152518/158839 co-relation queries the response was YES. [2023-08-26 13:36:55,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92910 conditions, 16721 events. 12577/16721 cut-off events. For 152518/158839 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 87058 event pairs, 3335 based on Foata normal form. 2752/19370 useless extension candidates. Maximal degree in co-relation 92860. Up to 11083 conditions per place. [2023-08-26 13:36:55,946 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 207 selfloop transitions, 29 changer transitions 0/245 dead transitions. [2023-08-26 13:36:55,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 245 transitions, 2813 flow [2023-08-26 13:36:55,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-26 13:36:55,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 13:36:55,948 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-26 13:36:55,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-26 13:36:55,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:55,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-26 13:36:55,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 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 13:36:55,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:55,951 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:55,951 INFO L175 Difference]: Start difference. First operand has 138 places, 119 transitions, 1167 flow. Second operand 5 states and 635 transitions. [2023-08-26 13:36:55,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 245 transitions, 2813 flow [2023-08-26 13:36:56,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 245 transitions, 2751 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 13:36:56,573 INFO L231 Difference]: Finished difference. Result has 140 places, 120 transitions, 1186 flow [2023-08-26 13:36:56,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1105, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1186, PETRI_PLACES=140, PETRI_TRANSITIONS=120} [2023-08-26 13:36:56,573 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2023-08-26 13:36:56,573 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 120 transitions, 1186 flow [2023-08-26 13:36:56,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:56,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:56,574 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 13:36:56,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 13:36:56,574 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:56,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:56,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1414080088, now seen corresponding path program 6 times [2023-08-26 13:36:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:56,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043983146] [2023-08-26 13:36:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:56,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:56,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043983146] [2023-08-26 13:36:56,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043983146] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:56,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:56,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290566696] [2023-08-26 13:36:56,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:56,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:56,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:56,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 120 transitions, 1186 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:56,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:56,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:56,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:36:58,468 INFO L124 PetriNetUnfolderBase]: 11925/15821 cut-off events. [2023-08-26 13:36:58,468 INFO L125 PetriNetUnfolderBase]: For 146060/152017 co-relation queries the response was YES. [2023-08-26 13:36:58,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88293 conditions, 15821 events. 11925/15821 cut-off events. For 146060/152017 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 81676 event pairs, 3289 based on Foata normal form. 2540/18258 useless extension candidates. Maximal degree in co-relation 88242. Up to 10857 conditions per place. [2023-08-26 13:36:58,581 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 206 selfloop transitions, 29 changer transitions 5/249 dead transitions. [2023-08-26 13:36:58,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 249 transitions, 2849 flow [2023-08-26 13:36:58,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:36:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:36:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-26 13:36:58,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807547169811321 [2023-08-26 13:36:58,582 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-26 13:36:58,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-26 13:36:58,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:36:58,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-26 13:36:58,583 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 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 13:36:58,584 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:58,584 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:36:58,584 INFO L175 Difference]: Start difference. First operand has 140 places, 120 transitions, 1186 flow. Second operand 5 states and 637 transitions. [2023-08-26 13:36:58,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 249 transitions, 2849 flow [2023-08-26 13:36:59,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 249 transitions, 2784 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 13:36:59,098 INFO L231 Difference]: Finished difference. Result has 141 places, 121 transitions, 1202 flow [2023-08-26 13:36:59,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1202, PETRI_PLACES=141, PETRI_TRANSITIONS=121} [2023-08-26 13:36:59,098 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 87 predicate places. [2023-08-26 13:36:59,098 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 121 transitions, 1202 flow [2023-08-26 13:36:59,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:59,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:36:59,099 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 13:36:59,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 13:36:59,099 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:36:59,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:36:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1775956197, now seen corresponding path program 4 times [2023-08-26 13:36:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:36:59,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515063274] [2023-08-26 13:36:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:36:59,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:36:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:36:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:36:59,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:36:59,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515063274] [2023-08-26 13:36:59,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515063274] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:36:59,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:36:59,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:36:59,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496422555] [2023-08-26 13:36:59,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:36:59,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:36:59,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:36:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:36:59,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:36:59,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:36:59,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 121 transitions, 1202 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:36:59,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:36:59,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:36:59,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:00,848 INFO L124 PetriNetUnfolderBase]: 11734/15579 cut-off events. [2023-08-26 13:37:00,848 INFO L125 PetriNetUnfolderBase]: For 162405/169019 co-relation queries the response was YES. [2023-08-26 13:37:00,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87225 conditions, 15579 events. 11734/15579 cut-off events. For 162405/169019 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 82928 event pairs, 3596 based on Foata normal form. 2431/17704 useless extension candidates. Maximal degree in co-relation 87174. Up to 12170 conditions per place. [2023-08-26 13:37:00,949 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 224 selfloop transitions, 22 changer transitions 12/267 dead transitions. [2023-08-26 13:37:00,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 267 transitions, 3233 flow [2023-08-26 13:37:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:37:00,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:37:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-26 13:37:00,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807547169811321 [2023-08-26 13:37:00,950 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-26 13:37:00,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-26 13:37:00,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:00,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-26 13:37:00,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 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 13:37:00,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:37:00,953 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:37:00,953 INFO L175 Difference]: Start difference. First operand has 141 places, 121 transitions, 1202 flow. Second operand 5 states and 637 transitions. [2023-08-26 13:37:00,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 267 transitions, 3233 flow [2023-08-26 13:37:01,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 267 transitions, 3077 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-26 13:37:01,393 INFO L231 Difference]: Finished difference. Result has 144 places, 122 transitions, 1227 flow [2023-08-26 13:37:01,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1227, PETRI_PLACES=144, PETRI_TRANSITIONS=122} [2023-08-26 13:37:01,393 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2023-08-26 13:37:01,393 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 122 transitions, 1227 flow [2023-08-26 13:37:01,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:37:01,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:01,394 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 13:37:01,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 13:37:01,394 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:01,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:01,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2006623494, now seen corresponding path program 6 times [2023-08-26 13:37:01,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:01,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846372166] [2023-08-26 13:37:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:01,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:01,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:01,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:01,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846372166] [2023-08-26 13:37:01,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846372166] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:37:01,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:37:01,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:37:01,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862632297] [2023-08-26 13:37:01,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:37:01,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:37:01,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:01,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:37:01,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:37:01,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:37:01,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 122 transitions, 1227 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:37:01,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:01,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:37:01,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:03,141 INFO L124 PetriNetUnfolderBase]: 11192/14869 cut-off events. [2023-08-26 13:37:03,141 INFO L125 PetriNetUnfolderBase]: For 152781/158288 co-relation queries the response was YES. [2023-08-26 13:37:03,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82469 conditions, 14869 events. 11192/14869 cut-off events. For 152781/158288 co-relation queries the response was YES. Maximal size of possible extension queue 1052. Compared 77794 event pairs, 2656 based on Foata normal form. 1989/16567 useless extension candidates. Maximal degree in co-relation 82417. Up to 9580 conditions per place. [2023-08-26 13:37:03,227 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 213 selfloop transitions, 29 changer transitions 12/263 dead transitions. [2023-08-26 13:37:03,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 263 transitions, 3125 flow [2023-08-26 13:37:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:37:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:37:03,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 633 transitions. [2023-08-26 13:37:03,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47773584905660377 [2023-08-26 13:37:03,229 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 633 transitions. [2023-08-26 13:37:03,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 633 transitions. [2023-08-26 13:37:03,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:03,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 633 transitions. [2023-08-26 13:37:03,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 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 13:37:03,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:37:03,232 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:37:03,232 INFO L175 Difference]: Start difference. First operand has 144 places, 122 transitions, 1227 flow. Second operand 5 states and 633 transitions. [2023-08-26 13:37:03,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 263 transitions, 3125 flow [2023-08-26 13:37:03,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 263 transitions, 3069 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-26 13:37:03,599 INFO L231 Difference]: Finished difference. Result has 146 places, 123 transitions, 1253 flow [2023-08-26 13:37:03,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1173, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1253, PETRI_PLACES=146, PETRI_TRANSITIONS=123} [2023-08-26 13:37:03,600 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 92 predicate places. [2023-08-26 13:37:03,600 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 123 transitions, 1253 flow [2023-08-26 13:37:03,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:37:03,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:03,601 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 13:37:03,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 13:37:03,601 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:03,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:03,601 INFO L85 PathProgramCache]: Analyzing trace with hash -238213431, now seen corresponding path program 5 times [2023-08-26 13:37:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:03,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365619033] [2023-08-26 13:37:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:03,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:03,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365619033] [2023-08-26 13:37:03,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365619033] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:37:03,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:37:03,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:37:03,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287567828] [2023-08-26 13:37:03,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:37:03,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:37:03,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:03,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:37:03,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:37:03,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:37:03,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 123 transitions, 1253 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:37:03,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:03,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:37:03,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:05,127 INFO L124 PetriNetUnfolderBase]: 11071/14749 cut-off events. [2023-08-26 13:37:05,127 INFO L125 PetriNetUnfolderBase]: For 152272/157847 co-relation queries the response was YES. [2023-08-26 13:37:05,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81777 conditions, 14749 events. 11071/14749 cut-off events. For 152272/157847 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 77495 event pairs, 2488 based on Foata normal form. 2064/16537 useless extension candidates. Maximal degree in co-relation 81724. Up to 9178 conditions per place. [2023-08-26 13:37:05,247 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 228 selfloop transitions, 29 changer transitions 0/266 dead transitions. [2023-08-26 13:37:05,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 266 transitions, 3179 flow [2023-08-26 13:37:05,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:37:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:37:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 635 transitions. [2023-08-26 13:37:05,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2023-08-26 13:37:05,248 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 635 transitions. [2023-08-26 13:37:05,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 635 transitions. [2023-08-26 13:37:05,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:05,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 635 transitions. [2023-08-26 13:37:05,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 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 13:37:05,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:37:05,250 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:37:05,251 INFO L175 Difference]: Start difference. First operand has 146 places, 123 transitions, 1253 flow. Second operand 5 states and 635 transitions. [2023-08-26 13:37:05,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 266 transitions, 3179 flow [2023-08-26 13:37:05,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 266 transitions, 3117 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 13:37:05,925 INFO L231 Difference]: Finished difference. Result has 148 places, 124 transitions, 1272 flow [2023-08-26 13:37:05,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1272, PETRI_PLACES=148, PETRI_TRANSITIONS=124} [2023-08-26 13:37:05,926 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 94 predicate places. [2023-08-26 13:37:05,926 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 124 transitions, 1272 flow [2023-08-26 13:37:05,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:37:05,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:05,926 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 13:37:05,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 13:37:05,927 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:05,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash 967319865, now seen corresponding path program 6 times [2023-08-26 13:37:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508937355] [2023-08-26 13:37:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:05,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:05,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:05,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:05,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:05,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508937355] [2023-08-26 13:37:05,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508937355] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:37:05,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:37:05,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:37:05,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543978754] [2023-08-26 13:37:05,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:37:05,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:37:05,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:05,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:37:05,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:37:05,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:37:05,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 124 transitions, 1272 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:37:05,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:05,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:37:05,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:07,548 INFO L124 PetriNetUnfolderBase]: 10178/13511 cut-off events. [2023-08-26 13:37:07,548 INFO L125 PetriNetUnfolderBase]: For 137107/142115 co-relation queries the response was YES. [2023-08-26 13:37:07,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75404 conditions, 13511 events. 10178/13511 cut-off events. For 137107/142115 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 70833 event pairs, 2561 based on Foata normal form. 1929/15152 useless extension candidates. Maximal degree in co-relation 75350. Up to 8483 conditions per place. [2023-08-26 13:37:07,656 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 219 selfloop transitions, 29 changer transitions 12/269 dead transitions. [2023-08-26 13:37:07,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 269 transitions, 3199 flow [2023-08-26 13:37:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:37:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:37:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-26 13:37:07,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807547169811321 [2023-08-26 13:37:07,657 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-26 13:37:07,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-26 13:37:07,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:07,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-26 13:37:07,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 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 13:37:07,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:37:07,660 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 265.0) internal successors, (1590), 6 states have internal predecessors, (1590), 0 states have call successors, (0), 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 13:37:07,660 INFO L175 Difference]: Start difference. First operand has 148 places, 124 transitions, 1272 flow. Second operand 5 states and 637 transitions. [2023-08-26 13:37:07,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 269 transitions, 3199 flow [2023-08-26 13:37:08,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 269 transitions, 3134 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 13:37:08,045 INFO L231 Difference]: Finished difference. Result has 149 places, 125 transitions, 1288 flow [2023-08-26 13:37:08,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1288, PETRI_PLACES=149, PETRI_TRANSITIONS=125} [2023-08-26 13:37:08,045 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2023-08-26 13:37:08,045 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 125 transitions, 1288 flow [2023-08-26 13:37:08,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 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 13:37:08,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:08,046 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 13:37:08,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 13:37:08,046 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:08,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash -243980241, now seen corresponding path program 1 times [2023-08-26 13:37:08,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:08,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303538826] [2023-08-26 13:37:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:08,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:08,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:37:08,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:08,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303538826] [2023-08-26 13:37:08,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303538826] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:37:08,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:37:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:37:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797129524] [2023-08-26 13:37:08,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:37:08,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:37:08,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:37:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:37:08,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 265 [2023-08-26 13:37:08,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 125 transitions, 1288 flow. Second operand has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 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 13:37:08,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:08,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 265 [2023-08-26 13:37:08,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:08,950 INFO L124 PetriNetUnfolderBase]: 5996/8111 cut-off events. [2023-08-26 13:37:08,950 INFO L125 PetriNetUnfolderBase]: For 100352/106255 co-relation queries the response was YES. [2023-08-26 13:37:08,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44931 conditions, 8111 events. 5996/8111 cut-off events. For 100352/106255 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 41945 event pairs, 1692 based on Foata normal form. 2552/10467 useless extension candidates. Maximal degree in co-relation 44877. Up to 5934 conditions per place. [2023-08-26 13:37:09,005 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 109 selfloop transitions, 10 changer transitions 21/156 dead transitions. [2023-08-26 13:37:09,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 156 transitions, 1782 flow [2023-08-26 13:37:09,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:37:09,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:37:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-26 13:37:09,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345911949685535 [2023-08-26 13:37:09,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-26 13:37:09,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-26 13:37:09,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:09,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-26 13:37:09,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 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 13:37:09,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:37:09,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 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 13:37:09,009 INFO L175 Difference]: Start difference. First operand has 149 places, 125 transitions, 1288 flow. Second operand 3 states and 425 transitions. [2023-08-26 13:37:09,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 156 transitions, 1782 flow [2023-08-26 13:37:09,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 156 transitions, 1736 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-26 13:37:09,208 INFO L231 Difference]: Finished difference. Result has 150 places, 108 transitions, 1087 flow [2023-08-26 13:37:09,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1087, PETRI_PLACES=150, PETRI_TRANSITIONS=108} [2023-08-26 13:37:09,209 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 96 predicate places. [2023-08-26 13:37:09,209 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 108 transitions, 1087 flow [2023-08-26 13:37:09,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 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 13:37:09,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:09,210 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 13:37:09,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 13:37:09,210 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:09,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:09,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1319085534, now seen corresponding path program 1 times [2023-08-26 13:37:09,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:09,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533394440] [2023-08-26 13:37:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:09,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:09,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:09,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533394440] [2023-08-26 13:37:09,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533394440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:37:09,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36640716] [2023-08-26 13:37:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:09,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:37:09,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:37:09,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:37:09,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 13:37:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:09,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 13:37:09,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:37:09,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:09,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:37:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 13:37:09,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36640716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:37:09,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:37:09,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-26 13:37:09,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760645530] [2023-08-26 13:37:09,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:37:09,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:37:09,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:09,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:37:09,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:37:09,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 265 [2023-08-26 13:37:09,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 108 transitions, 1087 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 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 13:37:09,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:09,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 265 [2023-08-26 13:37:09,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:11,374 INFO L124 PetriNetUnfolderBase]: 11429/15539 cut-off events. [2023-08-26 13:37:11,374 INFO L125 PetriNetUnfolderBase]: For 150969/159772 co-relation queries the response was YES. [2023-08-26 13:37:11,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78859 conditions, 15539 events. 11429/15539 cut-off events. For 150969/159772 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 84426 event pairs, 1079 based on Foata normal form. 4189/19637 useless extension candidates. Maximal degree in co-relation 78804. Up to 8189 conditions per place. [2023-08-26 13:37:11,496 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 243 selfloop transitions, 107 changer transitions 5/371 dead transitions. [2023-08-26 13:37:11,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 371 transitions, 4050 flow [2023-08-26 13:37:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:37:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:37:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1003 transitions. [2023-08-26 13:37:11,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540700808625337 [2023-08-26 13:37:11,499 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1003 transitions. [2023-08-26 13:37:11,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1003 transitions. [2023-08-26 13:37:11,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:11,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1003 transitions. [2023-08-26 13:37:11,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.28571428571428) internal successors, (1003), 7 states have internal predecessors, (1003), 0 states have call successors, (0), 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 13:37:11,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:37:11,501 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:37:11,501 INFO L175 Difference]: Start difference. First operand has 150 places, 108 transitions, 1087 flow. Second operand 7 states and 1003 transitions. [2023-08-26 13:37:11,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 371 transitions, 4050 flow [2023-08-26 13:37:12,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 371 transitions, 3933 flow, removed 9 selfloop flow, removed 16 redundant places. [2023-08-26 13:37:12,147 INFO L231 Difference]: Finished difference. Result has 135 places, 199 transitions, 2331 flow [2023-08-26 13:37:12,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2331, PETRI_PLACES=135, PETRI_TRANSITIONS=199} [2023-08-26 13:37:12,148 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 81 predicate places. [2023-08-26 13:37:12,148 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 199 transitions, 2331 flow [2023-08-26 13:37:12,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 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 13:37:12,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:12,148 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 13:37:12,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 13:37:12,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-26 13:37:12,349 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:12,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:12,349 INFO L85 PathProgramCache]: Analyzing trace with hash -779538940, now seen corresponding path program 2 times [2023-08-26 13:37:12,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:12,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988684165] [2023-08-26 13:37:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:12,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:12,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:12,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988684165] [2023-08-26 13:37:12,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988684165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:37:12,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107122168] [2023-08-26 13:37:12,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:37:12,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:37:12,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:37:12,471 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:37:12,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 13:37:12,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:37:12,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:37:12,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 13:37:12,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:37:12,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:12,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:37:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:12,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107122168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:37:12,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:37:12,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 5 [2023-08-26 13:37:12,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471113104] [2023-08-26 13:37:12,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:37:12,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:37:12,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:12,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:37:12,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:37:12,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 265 [2023-08-26 13:37:12,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 199 transitions, 2331 flow. Second operand has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 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 13:37:12,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:12,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 265 [2023-08-26 13:37:12,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:14,988 INFO L124 PetriNetUnfolderBase]: 16677/22639 cut-off events. [2023-08-26 13:37:14,988 INFO L125 PetriNetUnfolderBase]: For 223118/234689 co-relation queries the response was YES. [2023-08-26 13:37:15,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121850 conditions, 22639 events. 16677/22639 cut-off events. For 223118/234689 co-relation queries the response was YES. Maximal size of possible extension queue 1242. Compared 128458 event pairs, 2606 based on Foata normal form. 4108/26676 useless extension candidates. Maximal degree in co-relation 121804. Up to 16543 conditions per place. [2023-08-26 13:37:15,275 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 328 selfloop transitions, 98 changer transitions 5/447 dead transitions. [2023-08-26 13:37:15,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 447 transitions, 5542 flow [2023-08-26 13:37:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:37:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:37:15,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 999 transitions. [2023-08-26 13:37:15,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538544474393531 [2023-08-26 13:37:15,277 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 999 transitions. [2023-08-26 13:37:15,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 999 transitions. [2023-08-26 13:37:15,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:15,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 999 transitions. [2023-08-26 13:37:15,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.71428571428572) internal successors, (999), 7 states have internal predecessors, (999), 0 states have call successors, (0), 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 13:37:15,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:37:15,279 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:37:15,280 INFO L175 Difference]: Start difference. First operand has 135 places, 199 transitions, 2331 flow. Second operand 7 states and 999 transitions. [2023-08-26 13:37:15,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 447 transitions, 5542 flow [2023-08-26 13:37:16,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 447 transitions, 5302 flow, removed 120 selfloop flow, removed 0 redundant places. [2023-08-26 13:37:16,694 INFO L231 Difference]: Finished difference. Result has 144 places, 290 transitions, 3603 flow [2023-08-26 13:37:16,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3603, PETRI_PLACES=144, PETRI_TRANSITIONS=290} [2023-08-26 13:37:16,694 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2023-08-26 13:37:16,695 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 290 transitions, 3603 flow [2023-08-26 13:37:16,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.71428571428572) internal successors, (922), 7 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 13:37:16,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:16,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:37:16,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 13:37:16,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-26 13:37:16,896 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:16,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash -523257333, now seen corresponding path program 3 times [2023-08-26 13:37:16,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:16,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147898394] [2023-08-26 13:37:16,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:16,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:16,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:16,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:16,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147898394] [2023-08-26 13:37:16,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147898394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:37:16,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42578922] [2023-08-26 13:37:16,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:37:16,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:37:16,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:37:16,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:37:16,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 13:37:17,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 13:37:17,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:37:17,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 13:37:17,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:37:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:17,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:37:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:17,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42578922] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:37:17,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:37:17,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-26 13:37:17,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069943785] [2023-08-26 13:37:17,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:37:17,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 13:37:17,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:17,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 13:37:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-08-26 13:37:17,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:37:17,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 290 transitions, 3603 flow. Second operand has 11 states, 11 states have (on average 117.0909090909091) internal successors, (1288), 11 states have internal predecessors, (1288), 0 states have call successors, (0), 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 13:37:17,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:17,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:37:17,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:21,007 INFO L124 PetriNetUnfolderBase]: 24190/32811 cut-off events. [2023-08-26 13:37:21,007 INFO L125 PetriNetUnfolderBase]: For 346526/360324 co-relation queries the response was YES. [2023-08-26 13:37:21,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180470 conditions, 32811 events. 24190/32811 cut-off events. For 346526/360324 co-relation queries the response was YES. Maximal size of possible extension queue 1712. Compared 195911 event pairs, 1872 based on Foata normal form. 5292/37889 useless extension candidates. Maximal degree in co-relation 180420. Up to 11624 conditions per place. [2023-08-26 13:37:21,524 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 938 selfloop transitions, 63 changer transitions 0/1010 dead transitions. [2023-08-26 13:37:21,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 1010 transitions, 14213 flow [2023-08-26 13:37:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 13:37:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 13:37:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1279 transitions. [2023-08-26 13:37:21,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826415094339623 [2023-08-26 13:37:21,526 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1279 transitions. [2023-08-26 13:37:21,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1279 transitions. [2023-08-26 13:37:21,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:21,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1279 transitions. [2023-08-26 13:37:21,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 127.9) internal successors, (1279), 10 states have internal predecessors, (1279), 0 states have call successors, (0), 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 13:37:21,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 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 13:37:21,530 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 265.0) internal successors, (2915), 11 states have internal predecessors, (2915), 0 states have call successors, (0), 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 13:37:21,530 INFO L175 Difference]: Start difference. First operand has 144 places, 290 transitions, 3603 flow. Second operand 10 states and 1279 transitions. [2023-08-26 13:37:21,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 1010 transitions, 14213 flow [2023-08-26 13:37:23,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 1010 transitions, 13147 flow, removed 533 selfloop flow, removed 0 redundant places. [2023-08-26 13:37:23,813 INFO L231 Difference]: Finished difference. Result has 160 places, 331 transitions, 3903 flow [2023-08-26 13:37:23,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3903, PETRI_PLACES=160, PETRI_TRANSITIONS=331} [2023-08-26 13:37:23,814 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 106 predicate places. [2023-08-26 13:37:23,814 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 331 transitions, 3903 flow [2023-08-26 13:37:23,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 117.0909090909091) internal successors, (1288), 11 states have internal predecessors, (1288), 0 states have call successors, (0), 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 13:37:23,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:23,814 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:37:23,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 13:37:24,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 13:37:24,015 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:24,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:24,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1825158242, now seen corresponding path program 4 times [2023-08-26 13:37:24,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:24,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625382260] [2023-08-26 13:37:24,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:24,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:24,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:24,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625382260] [2023-08-26 13:37:24,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625382260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:37:24,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276466034] [2023-08-26 13:37:24,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:37:24,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:37:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:37:24,092 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:37:24,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 13:37:24,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:37:24,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:37:24,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 13:37:24,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:37:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:24,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:37:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:24,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276466034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:37:24,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:37:24,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-26 13:37:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466298499] [2023-08-26 13:37:24,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:37:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:37:24,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:37:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:37:24,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:37:24,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 331 transitions, 3903 flow. Second operand has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 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 13:37:24,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:24,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:37:24,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:30,721 INFO L124 PetriNetUnfolderBase]: 30166/40307 cut-off events. [2023-08-26 13:37:30,721 INFO L125 PetriNetUnfolderBase]: For 442927/456552 co-relation queries the response was YES. [2023-08-26 13:37:31,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234448 conditions, 40307 events. 30166/40307 cut-off events. For 442927/456552 co-relation queries the response was YES. Maximal size of possible extension queue 1962. Compared 233832 event pairs, 7020 based on Foata normal form. 5613/45348 useless extension candidates. Maximal degree in co-relation 234390. Up to 30085 conditions per place. [2023-08-26 13:37:31,175 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 1132 selfloop transitions, 150 changer transitions 0/1291 dead transitions. [2023-08-26 13:37:31,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 1291 transitions, 17266 flow [2023-08-26 13:37:31,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:37:31,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:37:31,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2116 transitions. [2023-08-26 13:37:31,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46970033296337405 [2023-08-26 13:37:31,179 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2116 transitions. [2023-08-26 13:37:31,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2116 transitions. [2023-08-26 13:37:31,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:31,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2116 transitions. [2023-08-26 13:37:31,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 124.47058823529412) internal successors, (2116), 17 states have internal predecessors, (2116), 0 states have call successors, (0), 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 13:37:31,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 265.0) internal successors, (4770), 18 states have internal predecessors, (4770), 0 states have call successors, (0), 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 13:37:31,184 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 265.0) internal successors, (4770), 18 states have internal predecessors, (4770), 0 states have call successors, (0), 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 13:37:31,184 INFO L175 Difference]: Start difference. First operand has 160 places, 331 transitions, 3903 flow. Second operand 17 states and 2116 transitions. [2023-08-26 13:37:31,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 1291 transitions, 17266 flow [2023-08-26 13:37:35,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1291 transitions, 17034 flow, removed 101 selfloop flow, removed 2 redundant places. [2023-08-26 13:37:35,052 INFO L231 Difference]: Finished difference. Result has 179 places, 448 transitions, 5447 flow [2023-08-26 13:37:35,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=3789, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5447, PETRI_PLACES=179, PETRI_TRANSITIONS=448} [2023-08-26 13:37:35,053 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 125 predicate places. [2023-08-26 13:37:35,053 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 448 transitions, 5447 flow [2023-08-26 13:37:35,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 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 13:37:35,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:35,053 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:37:35,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-26 13:37:35,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-26 13:37:35,259 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:35,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:35,259 INFO L85 PathProgramCache]: Analyzing trace with hash -810352, now seen corresponding path program 5 times [2023-08-26 13:37:35,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:35,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115437813] [2023-08-26 13:37:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:35,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:35,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:35,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:35,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115437813] [2023-08-26 13:37:35,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115437813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:37:35,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629196102] [2023-08-26 13:37:35,327 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:37:35,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:37:35,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:37:35,328 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:37:35,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 13:37:35,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:37:35,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:37:35,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 13:37:35,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:37:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:35,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:37:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:35,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629196102] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:37:35,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:37:35,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-08-26 13:37:35,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036324931] [2023-08-26 13:37:35,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:37:35,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 13:37:35,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:35,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 13:37:35,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-26 13:37:35,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:37:35,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 448 transitions, 5447 flow. Second operand has 11 states, 11 states have (on average 117.0) internal successors, (1287), 11 states have internal predecessors, (1287), 0 states have call successors, (0), 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 13:37:35,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:35,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:37:35,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:41,481 INFO L124 PetriNetUnfolderBase]: 30724/41060 cut-off events. [2023-08-26 13:37:41,481 INFO L125 PetriNetUnfolderBase]: For 507892/523303 co-relation queries the response was YES. [2023-08-26 13:37:41,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254796 conditions, 41060 events. 30724/41060 cut-off events. For 507892/523303 co-relation queries the response was YES. Maximal size of possible extension queue 2089. Compared 239976 event pairs, 7702 based on Foata normal form. 5519/46116 useless extension candidates. Maximal degree in co-relation 254733. Up to 28271 conditions per place. [2023-08-26 13:37:41,994 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 654 selfloop transitions, 69 changer transitions 32/764 dead transitions. [2023-08-26 13:37:41,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 764 transitions, 10471 flow [2023-08-26 13:37:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:37:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:37:41,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 901 transitions. [2023-08-26 13:37:41,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2023-08-26 13:37:41,996 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 901 transitions. [2023-08-26 13:37:41,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 901 transitions. [2023-08-26 13:37:41,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:41,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 901 transitions. [2023-08-26 13:37:41,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.71428571428572) internal successors, (901), 7 states have internal predecessors, (901), 0 states have call successors, (0), 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 13:37:41,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:37:41,998 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 265.0) internal successors, (2120), 8 states have internal predecessors, (2120), 0 states have call successors, (0), 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 13:37:41,998 INFO L175 Difference]: Start difference. First operand has 179 places, 448 transitions, 5447 flow. Second operand 7 states and 901 transitions. [2023-08-26 13:37:41,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 764 transitions, 10471 flow [2023-08-26 13:37:45,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 764 transitions, 9828 flow, removed 252 selfloop flow, removed 5 redundant places. [2023-08-26 13:37:45,911 INFO L231 Difference]: Finished difference. Result has 182 places, 451 transitions, 5004 flow [2023-08-26 13:37:45,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=4804, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5004, PETRI_PLACES=182, PETRI_TRANSITIONS=451} [2023-08-26 13:37:45,911 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 128 predicate places. [2023-08-26 13:37:45,911 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 451 transitions, 5004 flow [2023-08-26 13:37:45,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 117.0) internal successors, (1287), 11 states have internal predecessors, (1287), 0 states have call successors, (0), 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 13:37:45,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:37:45,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:37:45,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 13:37:46,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-26 13:37:46,117 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:37:46,117 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:37:46,117 INFO L85 PathProgramCache]: Analyzing trace with hash -886827053, now seen corresponding path program 6 times [2023-08-26 13:37:46,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:37:46,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147432478] [2023-08-26 13:37:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:37:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:37:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:37:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:46,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:37:46,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147432478] [2023-08-26 13:37:46,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147432478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:37:46,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788284344] [2023-08-26 13:37:46,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 13:37:46,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:37:46,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:37:46,200 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:37:46,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 13:37:46,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 13:37:46,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:37:46,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 13:37:46,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:37:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:46,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:37:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:37:46,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788284344] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:37:46,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:37:46,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-08-26 13:37:46,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104717335] [2023-08-26 13:37:46,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:37:46,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 13:37:46,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:37:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 13:37:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-26 13:37:46,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:37:46,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 451 transitions, 5004 flow. Second operand has 13 states, 13 states have (on average 117.38461538461539) internal successors, (1526), 13 states have internal predecessors, (1526), 0 states have call successors, (0), 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 13:37:46,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:37:46,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:37:46,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:37:54,083 INFO L124 PetriNetUnfolderBase]: 39006/52018 cut-off events. [2023-08-26 13:37:54,083 INFO L125 PetriNetUnfolderBase]: For 629393/647414 co-relation queries the response was YES. [2023-08-26 13:37:54,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318832 conditions, 52018 events. 39006/52018 cut-off events. For 629393/647414 co-relation queries the response was YES. Maximal size of possible extension queue 2373. Compared 307696 event pairs, 5032 based on Foata normal form. 8007/59594 useless extension candidates. Maximal degree in co-relation 318767. Up to 21449 conditions per place. [2023-08-26 13:37:54,762 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 1249 selfloop transitions, 138 changer transitions 0/1396 dead transitions. [2023-08-26 13:37:54,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 1396 transitions, 18966 flow [2023-08-26 13:37:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 13:37:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 13:37:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1766 transitions. [2023-08-26 13:37:54,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.476010781671159 [2023-08-26 13:37:54,765 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1766 transitions. [2023-08-26 13:37:54,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1766 transitions. [2023-08-26 13:37:54,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:37:54,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1766 transitions. [2023-08-26 13:37:54,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.14285714285714) internal successors, (1766), 14 states have internal predecessors, (1766), 0 states have call successors, (0), 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 13:37:54,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 265.0) internal successors, (3975), 15 states have internal predecessors, (3975), 0 states have call successors, (0), 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 13:37:54,768 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 265.0) internal successors, (3975), 15 states have internal predecessors, (3975), 0 states have call successors, (0), 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 13:37:54,768 INFO L175 Difference]: Start difference. First operand has 182 places, 451 transitions, 5004 flow. Second operand 14 states and 1766 transitions. [2023-08-26 13:37:54,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 1396 transitions, 18966 flow [2023-08-26 13:38:01,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 1396 transitions, 18793 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-26 13:38:01,076 INFO L231 Difference]: Finished difference. Result has 198 places, 536 transitions, 6524 flow [2023-08-26 13:38:01,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=4846, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6524, PETRI_PLACES=198, PETRI_TRANSITIONS=536} [2023-08-26 13:38:01,077 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 144 predicate places. [2023-08-26 13:38:01,077 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 536 transitions, 6524 flow [2023-08-26 13:38:01,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 117.38461538461539) internal successors, (1526), 13 states have internal predecessors, (1526), 0 states have call successors, (0), 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 13:38:01,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:38:01,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:38:01,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 13:38:01,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-26 13:38:01,285 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:38:01,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:38:01,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1366224351, now seen corresponding path program 7 times [2023-08-26 13:38:01,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:38:01,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195243344] [2023-08-26 13:38:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:38:01,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:38:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:38:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:38:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:38:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195243344] [2023-08-26 13:38:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195243344] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:38:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382266019] [2023-08-26 13:38:01,350 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 13:38:01,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:38:01,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:38:01,351 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:38:01,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 13:38:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:38:01,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 13:38:01,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:38:01,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:38:01,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:38:01,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:38:01,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382266019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:38:01,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:38:01,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-26 13:38:01,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249091835] [2023-08-26 13:38:01,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:38:01,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:38:01,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:38:01,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:38:01,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:38:01,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:38:01,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 536 transitions, 6524 flow. Second operand has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 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 13:38:01,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:38:01,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:38:01,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:38:11,718 INFO L124 PetriNetUnfolderBase]: 47777/63466 cut-off events. [2023-08-26 13:38:11,719 INFO L125 PetriNetUnfolderBase]: For 1060338/1081954 co-relation queries the response was YES. [2023-08-26 13:38:12,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428118 conditions, 63466 events. 47777/63466 cut-off events. For 1060338/1081954 co-relation queries the response was YES. Maximal size of possible extension queue 2871. Compared 381104 event pairs, 4989 based on Foata normal form. 9105/72124 useless extension candidates. Maximal degree in co-relation 428047. Up to 25178 conditions per place. [2023-08-26 13:38:12,647 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 1308 selfloop transitions, 253 changer transitions 0/1570 dead transitions. [2023-08-26 13:38:12,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 1570 transitions, 22239 flow [2023-08-26 13:38:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 13:38:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 13:38:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2006 transitions. [2023-08-26 13:38:12,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731132075471698 [2023-08-26 13:38:12,649 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2006 transitions. [2023-08-26 13:38:12,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2006 transitions. [2023-08-26 13:38:12,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:38:12,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2006 transitions. [2023-08-26 13:38:12,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 125.375) internal successors, (2006), 16 states have internal predecessors, (2006), 0 states have call successors, (0), 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 13:38:12,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 265.0) internal successors, (4505), 17 states have internal predecessors, (4505), 0 states have call successors, (0), 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 13:38:12,654 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 265.0) internal successors, (4505), 17 states have internal predecessors, (4505), 0 states have call successors, (0), 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 13:38:12,654 INFO L175 Difference]: Start difference. First operand has 198 places, 536 transitions, 6524 flow. Second operand 16 states and 2006 transitions. [2023-08-26 13:38:12,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 1570 transitions, 22239 flow [2023-08-26 13:38:25,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 1570 transitions, 21416 flow, removed 394 selfloop flow, removed 3 redundant places. [2023-08-26 13:38:25,891 INFO L231 Difference]: Finished difference. Result has 217 places, 644 transitions, 8302 flow [2023-08-26 13:38:25,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=5901, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8302, PETRI_PLACES=217, PETRI_TRANSITIONS=644} [2023-08-26 13:38:25,891 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 163 predicate places. [2023-08-26 13:38:25,892 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 644 transitions, 8302 flow [2023-08-26 13:38:25,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 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 13:38:25,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:38:25,892 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:38:25,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 13:38:26,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:38:26,096 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 13:38:26,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:38:26,097 INFO L85 PathProgramCache]: Analyzing trace with hash 278766449, now seen corresponding path program 8 times [2023-08-26 13:38:26,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:38:26,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877600969] [2023-08-26 13:38:26,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:38:26,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:38:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:38:26,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:38:26,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:38:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877600969] [2023-08-26 13:38:26,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877600969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:38:26,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509220572] [2023-08-26 13:38:26,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:38:26,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:38:26,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:38:26,163 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 13:38:26,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 13:38:26,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:38:26,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:38:26,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 13:38:26,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:38:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:38:26,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:38:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:38:26,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509220572] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:38:26,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:38:26,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-26 13:38:26,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014727854] [2023-08-26 13:38:26,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:38:26,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 13:38:26,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:38:26,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 13:38:26,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-26 13:38:26,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 265 [2023-08-26 13:38:26,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 644 transitions, 8302 flow. Second operand has 12 states, 12 states have (on average 116.91666666666667) internal successors, (1403), 12 states have internal predecessors, (1403), 0 states have call successors, (0), 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 13:38:26,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:38:26,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 265 [2023-08-26 13:38:26,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:38:37,382 INFO L124 PetriNetUnfolderBase]: 48273/64251 cut-off events. [2023-08-26 13:38:37,382 INFO L125 PetriNetUnfolderBase]: For 1180923/1202071 co-relation queries the response was YES. [2023-08-26 13:38:38,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456951 conditions, 64251 events. 48273/64251 cut-off events. For 1180923/1202071 co-relation queries the response was YES. Maximal size of possible extension queue 2911. Compared 388311 event pairs, 8027 based on Foata normal form. 7850/71408 useless extension candidates. Maximal degree in co-relation 456872. Up to 36045 conditions per place. [2023-08-26 13:38:38,414 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 1176 selfloop transitions, 194 changer transitions 21/1400 dead transitions. [2023-08-26 13:38:38,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 1400 transitions, 20178 flow [2023-08-26 13:38:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 13:38:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 13:38:38,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1624 transitions. [2023-08-26 13:38:38,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714078374455733 [2023-08-26 13:38:38,417 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1624 transitions. [2023-08-26 13:38:38,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1624 transitions. [2023-08-26 13:38:38,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:38:38,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1624 transitions. [2023-08-26 13:38:38,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 124.92307692307692) internal successors, (1624), 13 states have internal predecessors, (1624), 0 states have call successors, (0), 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 13:38:38,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 265.0) internal successors, (3710), 14 states have internal predecessors, (3710), 0 states have call successors, (0), 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 13:38:38,421 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 265.0) internal successors, (3710), 14 states have internal predecessors, (3710), 0 states have call successors, (0), 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 13:38:38,421 INFO L175 Difference]: Start difference. First operand has 217 places, 644 transitions, 8302 flow. Second operand 13 states and 1624 transitions. [2023-08-26 13:38:38,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 1400 transitions, 20178 flow