/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/chl-collitem-subst.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:05:22,295 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:05:22,361 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 13:05:22,365 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:05:22,365 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:05:22,389 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:05:22,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:05:22,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:05:22,393 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:05:22,396 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:05:22,396 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:05:22,396 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:05:22,396 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:05:22,397 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:05:22,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:05:22,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:05:22,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:05:22,398 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:05:22,398 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:05:22,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:05:22,398 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:05:22,399 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:05:22,399 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:05:22,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:05:22,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:05:22,400 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:05:22,400 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:05:22,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:05:22,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:05:22,400 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:05:22,401 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:05:22,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:05:22,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:05:22,401 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:05:22,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:05:22,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:05:22,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:05:22,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:05:22,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:05:22,678 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:05:22,678 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:05:22,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-collitem-subst.wvr.c [2023-08-26 13:05:23,564 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:05:23,751 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:05:23,751 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-collitem-subst.wvr.c [2023-08-26 13:05:23,756 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7674d96f7/444717774ed344a2a781525f32f23dce/FLAG221d37f8e [2023-08-26 13:05:23,764 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7674d96f7/444717774ed344a2a781525f32f23dce [2023-08-26 13:05:23,765 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:05:23,766 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:05:23,767 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:05:23,767 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:05:23,768 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:05:23,769 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,769 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@199fb321 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23, skipping insertion in model container [2023-08-26 13:05:23,769 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,784 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:05:23,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:05:23,888 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:05:23,905 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:05:23,913 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:05:23,913 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:05:23,918 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:05:23,918 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23 WrapperNode [2023-08-26 13:05:23,918 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:05:23,919 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:05:23,919 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:05:23,919 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:05:23,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,928 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,954 INFO L138 Inliner]: procedures = 23, calls = 47, calls flagged for inlining = 19, calls inlined = 41, statements flattened = 367 [2023-08-26 13:05:23,954 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:05:23,955 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:05:23,955 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:05:23,955 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:05:23,960 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,960 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,963 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,963 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,973 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:05:23,977 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:05:23,977 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:05:23,977 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:05:23,978 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (1/1) ... [2023-08-26 13:05:23,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:05:23,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:05:23,999 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 13:05:24,008 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 13:05:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:05:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:05:24,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:05:24,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:05:24,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:05:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:05:24,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:05:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:05:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:05:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:05:24,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:05:24,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:05:24,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:05:24,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:05:24,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:05:24,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:05:24,029 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 13:05:24,131 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:05:24,133 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:05:24,518 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:05:24,904 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:05:24,904 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:05:24,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:05:24 BoogieIcfgContainer [2023-08-26 13:05:24,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:05:24,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:05:24,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:05:24,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:05:24,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:05:23" (1/3) ... [2023-08-26 13:05:24,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bec12e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:05:24, skipping insertion in model container [2023-08-26 13:05:24,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:05:23" (2/3) ... [2023-08-26 13:05:24,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6bec12e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:05:24, skipping insertion in model container [2023-08-26 13:05:24,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:05:24" (3/3) ... [2023-08-26 13:05:24,913 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-collitem-subst.wvr.c [2023-08-26 13:05:24,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:05:24,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:05:24,926 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:05:25,014 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:05:25,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 151 transitions, 326 flow [2023-08-26 13:05:25,112 INFO L124 PetriNetUnfolderBase]: 2/148 cut-off events. [2023-08-26 13:05:25,113 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:05:25,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 148 events. 2/148 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2023-08-26 13:05:25,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 151 transitions, 326 flow [2023-08-26 13:05:25,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 137 transitions, 292 flow [2023-08-26 13:05:25,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:05:25,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 137 transitions, 292 flow [2023-08-26 13:05:25,137 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 137 transitions, 292 flow [2023-08-26 13:05:25,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 137 transitions, 292 flow [2023-08-26 13:05:25,175 INFO L124 PetriNetUnfolderBase]: 2/137 cut-off events. [2023-08-26 13:05:25,175 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:05:25,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 137 events. 2/137 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 55 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-08-26 13:05:25,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 378 [2023-08-26 13:05:34,755 INFO L134 LiptonReduction]: Checked pairs total: 703 [2023-08-26 13:05:34,756 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-08-26 13:05:34,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:05:34,768 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;@361d544c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:05:34,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:05:34,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:05:34,769 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:05:34,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:05:34,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:34,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:05:34,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:34,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:34,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1251, now seen corresponding path program 1 times [2023-08-26 13:05:34,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:34,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121326627] [2023-08-26 13:05:34,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:34,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:34,837 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 13:05:34,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:34,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121326627] [2023-08-26 13:05:34,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121326627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:34,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:34,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:05:34,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27145102] [2023-08-26 13:05:34,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:34,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:05:34,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:34,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:05:34,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:05:34,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 292 [2023-08-26 13:05:34,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:34,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:34,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 292 [2023-08-26 13:05:34,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:34,952 INFO L124 PetriNetUnfolderBase]: 81/164 cut-off events. [2023-08-26 13:05:34,952 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 13:05:34,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 164 events. 81/164 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 460 event pairs, 81 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 244. Up to 165 conditions per place. [2023-08-26 13:05:34,955 INFO L140 encePairwiseOnDemand]: 290/292 looper letters, 26 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-08-26 13:05:34,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 122 flow [2023-08-26 13:05:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:05:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:05:34,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 306 transitions. [2023-08-26 13:05:34,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523972602739726 [2023-08-26 13:05:34,970 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 306 transitions. [2023-08-26 13:05:34,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 306 transitions. [2023-08-26 13:05:34,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:34,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 306 transitions. [2023-08-26 13:05:34,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 153.0) internal successors, (306), 2 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 13:05:34,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:34,982 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 292.0) internal successors, (876), 3 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:34,983 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 74 flow. Second operand 2 states and 306 transitions. [2023-08-26 13:05:34,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 122 flow [2023-08-26 13:05:34,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 110 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:05:34,986 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 58 flow [2023-08-26 13:05:34,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-26 13:05:34,989 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-26 13:05:34,990 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 58 flow [2023-08-26 13:05:34,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 139.5) internal successors, (279), 2 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:34,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:34,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:05:34,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:05:34,991 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:34,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:34,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1237680, now seen corresponding path program 1 times [2023-08-26 13:05:34,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:34,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522471852] [2023-08-26 13:05:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:34,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:35,274 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 13:05:35,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:35,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522471852] [2023-08-26 13:05:35,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522471852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:35,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:35,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:05:35,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997699217] [2023-08-26 13:05:35,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:35,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:05:35,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:35,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:05:35,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:05:35,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 292 [2023-08-26 13:05:35,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:35,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 292 [2023-08-26 13:05:35,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:35,347 INFO L124 PetriNetUnfolderBase]: 76/153 cut-off events. [2023-08-26 13:05:35,348 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:05:35,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 153 events. 76/153 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 421 event pairs, 76 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-08-26 13:05:35,349 INFO L140 encePairwiseOnDemand]: 289/292 looper letters, 23 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 13:05:35,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 102 flow [2023-08-26 13:05:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:05:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:05:35,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2023-08-26 13:05:35,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430365296803653 [2023-08-26 13:05:35,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 377 transitions. [2023-08-26 13:05:35,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 377 transitions. [2023-08-26 13:05:35,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:35,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 377 transitions. [2023-08-26 13:05:35,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,357 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,357 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 58 flow. Second operand 3 states and 377 transitions. [2023-08-26 13:05:35,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 102 flow [2023-08-26 13:05:35,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:05:35,359 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 56 flow [2023-08-26 13:05:35,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-26 13:05:35,362 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-26 13:05:35,362 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 56 flow [2023-08-26 13:05:35,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:35,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:05:35,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:05:35,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:35,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1237679, now seen corresponding path program 1 times [2023-08-26 13:05:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:35,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701307522] [2023-08-26 13:05:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:35,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:35,455 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 13:05:35,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:35,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701307522] [2023-08-26 13:05:35,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701307522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:35,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:35,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:05:35,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683175791] [2023-08-26 13:05:35,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:35,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:05:35,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:35,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:05:35,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:05:35,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 292 [2023-08-26 13:05:35,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:35,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 292 [2023-08-26 13:05:35,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:35,524 INFO L124 PetriNetUnfolderBase]: 71/142 cut-off events. [2023-08-26 13:05:35,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:05:35,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 142 events. 71/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 382 event pairs, 71 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 292. Up to 142 conditions per place. [2023-08-26 13:05:35,525 INFO L140 encePairwiseOnDemand]: 289/292 looper letters, 21 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 13:05:35,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 22 transitions, 96 flow [2023-08-26 13:05:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:05:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:05:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-26 13:05:35,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178082191780822 [2023-08-26 13:05:35,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-26 13:05:35,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-26 13:05:35,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:35,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-26 13:05:35,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,529 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 56 flow. Second operand 3 states and 366 transitions. [2023-08-26 13:05:35,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 22 transitions, 96 flow [2023-08-26 13:05:35,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:05:35,529 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 53 flow [2023-08-26 13:05:35,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-08-26 13:05:35,530 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-08-26 13:05:35,530 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 53 flow [2023-08-26 13:05:35,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:35,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:05:35,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:05:35,531 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:35,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:35,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1189443012, now seen corresponding path program 1 times [2023-08-26 13:05:35,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:35,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939815598] [2023-08-26 13:05:35,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:35,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:35,565 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 13:05:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939815598] [2023-08-26 13:05:35,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939815598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:35,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:35,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:05:35,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785092011] [2023-08-26 13:05:35,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:05:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:35,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:05:35,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:05:35,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 292 [2023-08-26 13:05:35,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:35,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 292 [2023-08-26 13:05:35,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:35,622 INFO L124 PetriNetUnfolderBase]: 66/131 cut-off events. [2023-08-26 13:05:35,622 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:05:35,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 131 events. 66/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 341 event pairs, 66 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 271. Up to 131 conditions per place. [2023-08-26 13:05:35,623 INFO L140 encePairwiseOnDemand]: 289/292 looper letters, 19 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 13:05:35,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 20 transitions, 89 flow [2023-08-26 13:05:35,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:05:35,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:05:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-08-26 13:05:35,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257990867579909 [2023-08-26 13:05:35,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-08-26 13:05:35,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-08-26 13:05:35,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:35,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-08-26 13:05:35,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,628 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 53 flow. Second operand 3 states and 373 transitions. [2023-08-26 13:05:35,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 20 transitions, 89 flow [2023-08-26 13:05:35,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:05:35,628 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 50 flow [2023-08-26 13:05:35,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2023-08-26 13:05:35,629 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-08-26 13:05:35,629 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 50 flow [2023-08-26 13:05:35,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:35,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:05:35,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:05:35,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:35,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1189443014, now seen corresponding path program 1 times [2023-08-26 13:05:35,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:35,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203813542] [2023-08-26 13:05:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:35,655 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 13:05:35,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:35,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203813542] [2023-08-26 13:05:35,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203813542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:35,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:35,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:05:35,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076452733] [2023-08-26 13:05:35,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:35,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:05:35,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:35,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:05:35,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:05:35,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 292 [2023-08-26 13:05:35,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:35,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 292 [2023-08-26 13:05:35,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:35,712 INFO L124 PetriNetUnfolderBase]: 61/120 cut-off events. [2023-08-26 13:05:35,712 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:05:35,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 120 events. 61/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 298 event pairs, 61 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 250. Up to 120 conditions per place. [2023-08-26 13:05:35,713 INFO L140 encePairwiseOnDemand]: 289/292 looper letters, 17 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-26 13:05:35,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 18 transitions, 82 flow [2023-08-26 13:05:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:05:35,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:05:35,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-26 13:05:35,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132420091324201 [2023-08-26 13:05:35,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-26 13:05:35,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-26 13:05:35,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:35,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-26 13:05:35,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,717 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 50 flow. Second operand 3 states and 362 transitions. [2023-08-26 13:05:35,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 18 transitions, 82 flow [2023-08-26 13:05:35,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 18 transitions, 81 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:05:35,718 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 47 flow [2023-08-26 13:05:35,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-08-26 13:05:35,719 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:05:35,719 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 47 flow [2023-08-26 13:05:35,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:35,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:35,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:05:35,720 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:35,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash 593469319, now seen corresponding path program 1 times [2023-08-26 13:05:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:35,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036578243] [2023-08-26 13:05:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:35,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:35,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:35,749 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 13:05:35,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:35,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036578243] [2023-08-26 13:05:35,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036578243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:35,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:35,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:05:35,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131778259] [2023-08-26 13:05:35,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:35,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:05:35,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:35,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:05:35,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:05:35,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 292 [2023-08-26 13:05:35,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:35,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 292 [2023-08-26 13:05:35,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:35,794 INFO L124 PetriNetUnfolderBase]: 49/100 cut-off events. [2023-08-26 13:05:35,794 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:05:35,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 100 events. 49/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 222 event pairs, 49 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 211. Up to 100 conditions per place. [2023-08-26 13:05:35,795 INFO L140 encePairwiseOnDemand]: 290/292 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 13:05:35,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 79 flow [2023-08-26 13:05:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:05:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:05:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-26 13:05:35,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212328767123288 [2023-08-26 13:05:35,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-26 13:05:35,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-26 13:05:35,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:35,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-26 13:05:35,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,799 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 47 flow. Second operand 3 states and 369 transitions. [2023-08-26 13:05:35,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 79 flow [2023-08-26 13:05:35,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 17 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:05:35,799 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 46 flow [2023-08-26 13:05:35,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-08-26 13:05:35,800 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:05:35,800 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 46 flow [2023-08-26 13:05:35,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:35,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:35,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:05:35,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:35,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:35,801 INFO L85 PathProgramCache]: Analyzing trace with hash 593469318, now seen corresponding path program 1 times [2023-08-26 13:05:35,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:35,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535361191] [2023-08-26 13:05:35,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:35,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:35,856 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 13:05:35,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:35,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535361191] [2023-08-26 13:05:35,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535361191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:35,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:35,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:05:35,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156406267] [2023-08-26 13:05:35,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:35,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:05:35,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:35,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:05:35,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:05:35,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 292 [2023-08-26 13:05:35,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:35,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 292 [2023-08-26 13:05:35,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:35,898 INFO L124 PetriNetUnfolderBase]: 37/80 cut-off events. [2023-08-26 13:05:35,898 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:05:35,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 80 events. 37/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 149 event pairs, 37 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 172. Up to 80 conditions per place. [2023-08-26 13:05:35,898 INFO L140 encePairwiseOnDemand]: 290/292 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 13:05:35,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 16 transitions, 76 flow [2023-08-26 13:05:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:05:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:05:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 341 transitions. [2023-08-26 13:05:35,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892694063926941 [2023-08-26 13:05:35,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 341 transitions. [2023-08-26 13:05:35,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 341 transitions. [2023-08-26 13:05:35,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:35,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 341 transitions. [2023-08-26 13:05:35,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 292.0) internal successors, (1168), 4 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,902 INFO L175 Difference]: Start difference. First operand has 28 places, 17 transitions, 46 flow. Second operand 3 states and 341 transitions. [2023-08-26 13:05:35,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 16 transitions, 76 flow [2023-08-26 13:05:35,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 16 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:05:35,903 INFO L231 Difference]: Finished difference. Result has 28 places, 16 transitions, 45 flow [2023-08-26 13:05:35,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=28, PETRI_TRANSITIONS=16} [2023-08-26 13:05:35,903 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:05:35,904 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 16 transitions, 45 flow [2023-08-26 13:05:35,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.4) internal successors, (547), 5 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:35,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:35,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:35,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:05:35,904 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:35,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:35,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1439788172, now seen corresponding path program 1 times [2023-08-26 13:05:35,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:35,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805640952] [2023-08-26 13:05:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:35,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:38,366 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 13:05:38,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:38,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805640952] [2023-08-26 13:05:38,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805640952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:38,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:38,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:05:38,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409935788] [2023-08-26 13:05:38,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:38,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:05:38,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:38,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:05:38,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:05:38,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 292 [2023-08-26 13:05:38,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 16 transitions, 45 flow. Second operand has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:38,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:38,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 292 [2023-08-26 13:05:38,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:38,590 INFO L124 PetriNetUnfolderBase]: 40/106 cut-off events. [2023-08-26 13:05:38,591 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 13:05:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 106 events. 40/106 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 324 event pairs, 6 based on Foata normal form. 1/107 useless extension candidates. Maximal degree in co-relation 226. Up to 48 conditions per place. [2023-08-26 13:05:38,591 INFO L140 encePairwiseOnDemand]: 287/292 looper letters, 30 selfloop transitions, 6 changer transitions 9/45 dead transitions. [2023-08-26 13:05:38,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 45 transitions, 203 flow [2023-08-26 13:05:38,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:05:38,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:05:38,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 706 transitions. [2023-08-26 13:05:38,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029680365296804 [2023-08-26 13:05:38,593 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 706 transitions. [2023-08-26 13:05:38,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 706 transitions. [2023-08-26 13:05:38,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:38,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 706 transitions. [2023-08-26 13:05:38,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.66666666666667) internal successors, (706), 6 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:38,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:38,596 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:38,596 INFO L175 Difference]: Start difference. First operand has 28 places, 16 transitions, 45 flow. Second operand 6 states and 706 transitions. [2023-08-26 13:05:38,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 45 transitions, 203 flow [2023-08-26 13:05:38,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 45 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:05:38,597 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 77 flow [2023-08-26 13:05:38,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=77, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-08-26 13:05:38,598 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-26 13:05:38,598 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 77 flow [2023-08-26 13:05:38,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:38,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:38,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:38,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:05:38,598 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:38,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:38,599 INFO L85 PathProgramCache]: Analyzing trace with hash 689878036, now seen corresponding path program 2 times [2023-08-26 13:05:38,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:38,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807550915] [2023-08-26 13:05:38,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:38,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:40,349 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 13:05:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:40,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807550915] [2023-08-26 13:05:40,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807550915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:40,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:40,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:05:40,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174415441] [2023-08-26 13:05:40,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:40,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:05:40,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:05:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:05:40,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 292 [2023-08-26 13:05:40,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:40,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:40,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 292 [2023-08-26 13:05:40,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:40,623 INFO L124 PetriNetUnfolderBase]: 36/114 cut-off events. [2023-08-26 13:05:40,623 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-08-26 13:05:40,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 114 events. 36/114 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 400 event pairs, 4 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 318. Up to 62 conditions per place. [2023-08-26 13:05:40,624 INFO L140 encePairwiseOnDemand]: 287/292 looper letters, 28 selfloop transitions, 5 changer transitions 10/43 dead transitions. [2023-08-26 13:05:40,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 43 transitions, 227 flow [2023-08-26 13:05:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:05:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:05:40,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 704 transitions. [2023-08-26 13:05:40,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4018264840182648 [2023-08-26 13:05:40,625 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 704 transitions. [2023-08-26 13:05:40,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 704 transitions. [2023-08-26 13:05:40,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:40,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 704 transitions. [2023-08-26 13:05:40,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.33333333333333) internal successors, (704), 6 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:40,628 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:40,629 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:40,629 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 77 flow. Second operand 6 states and 704 transitions. [2023-08-26 13:05:40,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 43 transitions, 227 flow [2023-08-26 13:05:40,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 223 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 13:05:40,630 INFO L231 Difference]: Finished difference. Result has 41 places, 20 transitions, 95 flow [2023-08-26 13:05:40,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=95, PETRI_PLACES=41, PETRI_TRANSITIONS=20} [2023-08-26 13:05:40,631 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-26 13:05:40,631 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 20 transitions, 95 flow [2023-08-26 13:05:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:40,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:40,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:05:40,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:40,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:40,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1014309684, now seen corresponding path program 3 times [2023-08-26 13:05:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117952823] [2023-08-26 13:05:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:40,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:43,172 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 13:05:43,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:43,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117952823] [2023-08-26 13:05:43,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117952823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:43,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:43,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:05:43,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981193942] [2023-08-26 13:05:43,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:43,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:05:43,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:43,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:05:43,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:05:43,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 292 [2023-08-26 13:05:43,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 20 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:43,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:43,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 292 [2023-08-26 13:05:43,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:43,519 INFO L124 PetriNetUnfolderBase]: 20/70 cut-off events. [2023-08-26 13:05:43,519 INFO L125 PetriNetUnfolderBase]: For 105/105 co-relation queries the response was YES. [2023-08-26 13:05:43,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 239 conditions, 70 events. 20/70 cut-off events. For 105/105 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 188 event pairs, 0 based on Foata normal form. 1/71 useless extension candidates. Maximal degree in co-relation 229. Up to 23 conditions per place. [2023-08-26 13:05:43,520 INFO L140 encePairwiseOnDemand]: 287/292 looper letters, 27 selfloop transitions, 6 changer transitions 9/42 dead transitions. [2023-08-26 13:05:43,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 239 flow [2023-08-26 13:05:43,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:05:43,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:05:43,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 702 transitions. [2023-08-26 13:05:43,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006849315068493 [2023-08-26 13:05:43,522 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 702 transitions. [2023-08-26 13:05:43,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 702 transitions. [2023-08-26 13:05:43,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:43,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 702 transitions. [2023-08-26 13:05:43,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:43,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:43,526 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:43,526 INFO L175 Difference]: Start difference. First operand has 41 places, 20 transitions, 95 flow. Second operand 6 states and 702 transitions. [2023-08-26 13:05:43,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 239 flow [2023-08-26 13:05:43,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 217 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-08-26 13:05:43,527 INFO L231 Difference]: Finished difference. Result has 42 places, 20 transitions, 97 flow [2023-08-26 13:05:43,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=97, PETRI_PLACES=42, PETRI_TRANSITIONS=20} [2023-08-26 13:05:43,528 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-26 13:05:43,528 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 20 transitions, 97 flow [2023-08-26 13:05:43,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:43,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:43,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:43,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:05:43,528 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:43,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:43,529 INFO L85 PathProgramCache]: Analyzing trace with hash -741288678, now seen corresponding path program 4 times [2023-08-26 13:05:43,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:43,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122779666] [2023-08-26 13:05:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:43,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:46,945 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 13:05:46,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:46,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122779666] [2023-08-26 13:05:46,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122779666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:46,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:46,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:05:46,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402681301] [2023-08-26 13:05:46,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:46,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:05:46,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:05:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:05:46,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 292 [2023-08-26 13:05:46,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 20 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:46,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:46,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 292 [2023-08-26 13:05:46,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:47,319 INFO L124 PetriNetUnfolderBase]: 15/67 cut-off events. [2023-08-26 13:05:47,319 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-08-26 13:05:47,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 67 events. 15/67 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 0 based on Foata normal form. 1/68 useless extension candidates. Maximal degree in co-relation 221. Up to 41 conditions per place. [2023-08-26 13:05:47,319 INFO L140 encePairwiseOnDemand]: 287/292 looper letters, 18 selfloop transitions, 4 changer transitions 12/34 dead transitions. [2023-08-26 13:05:47,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 34 transitions, 205 flow [2023-08-26 13:05:47,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:05:47,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:05:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 694 transitions. [2023-08-26 13:05:47,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961187214611872 [2023-08-26 13:05:47,322 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 694 transitions. [2023-08-26 13:05:47,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 694 transitions. [2023-08-26 13:05:47,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:47,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 694 transitions. [2023-08-26 13:05:47,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 115.66666666666667) internal successors, (694), 6 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:47,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:47,325 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:47,325 INFO L175 Difference]: Start difference. First operand has 42 places, 20 transitions, 97 flow. Second operand 6 states and 694 transitions. [2023-08-26 13:05:47,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 34 transitions, 205 flow [2023-08-26 13:05:47,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 34 transitions, 200 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 13:05:47,326 INFO L231 Difference]: Finished difference. Result has 45 places, 18 transitions, 91 flow [2023-08-26 13:05:47,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=91, PETRI_PLACES=45, PETRI_TRANSITIONS=18} [2023-08-26 13:05:47,327 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-08-26 13:05:47,327 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 18 transitions, 91 flow [2023-08-26 13:05:47,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:47,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:47,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:47,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:05:47,327 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:47,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash 921364010, now seen corresponding path program 5 times [2023-08-26 13:05:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780763345] [2023-08-26 13:05:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:49,559 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 13:05:49,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:49,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780763345] [2023-08-26 13:05:49,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780763345] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:49,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:49,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:05:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104662746] [2023-08-26 13:05:49,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:49,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:05:49,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:49,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:05:49,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:05:49,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 292 [2023-08-26 13:05:49,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 18 transitions, 91 flow. Second operand has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:49,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:49,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 292 [2023-08-26 13:05:49,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:49,845 INFO L124 PetriNetUnfolderBase]: 7/37 cut-off events. [2023-08-26 13:05:49,845 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 13:05:49,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 37 events. 7/37 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 128. Up to 14 conditions per place. [2023-08-26 13:05:49,846 INFO L140 encePairwiseOnDemand]: 287/292 looper letters, 17 selfloop transitions, 3 changer transitions 8/28 dead transitions. [2023-08-26 13:05:49,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 28 transitions, 171 flow [2023-08-26 13:05:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:05:49,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:05:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 688 transitions. [2023-08-26 13:05:49,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3926940639269406 [2023-08-26 13:05:49,848 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 688 transitions. [2023-08-26 13:05:49,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 688 transitions. [2023-08-26 13:05:49,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:49,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 688 transitions. [2023-08-26 13:05:49,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 114.66666666666667) internal successors, (688), 6 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:49,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:49,854 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:49,854 INFO L175 Difference]: Start difference. First operand has 45 places, 18 transitions, 91 flow. Second operand 6 states and 688 transitions. [2023-08-26 13:05:49,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 28 transitions, 171 flow [2023-08-26 13:05:49,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 152 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-26 13:05:49,857 INFO L231 Difference]: Finished difference. Result has 41 places, 16 transitions, 65 flow [2023-08-26 13:05:49,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=65, PETRI_PLACES=41, PETRI_TRANSITIONS=16} [2023-08-26 13:05:49,858 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-26 13:05:49,858 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 16 transitions, 65 flow [2023-08-26 13:05:49,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:49,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:05:49,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:49,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:05:49,859 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:05:49,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:05:49,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1781075918, now seen corresponding path program 6 times [2023-08-26 13:05:49,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:05:49,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321731886] [2023-08-26 13:05:49,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:05:49,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:05:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:05:52,018 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 13:05:52,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:05:52,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321731886] [2023-08-26 13:05:52,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321731886] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:05:52,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:05:52,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:05:52,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381483483] [2023-08-26 13:05:52,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:05:52,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:05:52,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:05:52,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:05:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:05:52,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 292 [2023-08-26 13:05:52,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 16 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:52,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:05:52,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 292 [2023-08-26 13:05:52,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:05:52,327 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-08-26 13:05:52,327 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 13:05:52,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 25 events. 5/25 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 86. Up to 10 conditions per place. [2023-08-26 13:05:52,327 INFO L140 encePairwiseOnDemand]: 287/292 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-26 13:05:52,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 20 transitions, 112 flow [2023-08-26 13:05:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:05:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:05:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 681 transitions. [2023-08-26 13:05:52,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3886986301369863 [2023-08-26 13:05:52,329 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 681 transitions. [2023-08-26 13:05:52,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 681 transitions. [2023-08-26 13:05:52,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:05:52,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 681 transitions. [2023-08-26 13:05:52,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.5) internal successors, (681), 6 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:52,333 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:52,333 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 292.0) internal successors, (2044), 7 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:52,333 INFO L175 Difference]: Start difference. First operand has 41 places, 16 transitions, 65 flow. Second operand 6 states and 681 transitions. [2023-08-26 13:05:52,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 20 transitions, 112 flow [2023-08-26 13:05:52,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 20 transitions, 99 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-26 13:05:52,335 INFO L231 Difference]: Finished difference. Result has 37 places, 0 transitions, 0 flow [2023-08-26 13:05:52,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=292, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=37, PETRI_TRANSITIONS=0} [2023-08-26 13:05:52,336 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2023-08-26 13:05:52,336 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 0 transitions, 0 flow [2023-08-26 13:05:52,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.2) internal successors, (566), 5 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:05:52,338 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-08-26 13:05:52,338 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 13:05:52,338 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 13:05:52,338 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 13:05:52,338 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (3 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 13:05:52,339 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 13:05:52,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:05:52,339 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:05:52,341 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:05:52,341 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:05:52,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:05:52 BasicIcfg [2023-08-26 13:05:52,344 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:05:52,344 INFO L158 Benchmark]: Toolchain (without parser) took 28577.93ms. Allocated memory was 362.8MB in the beginning and 1.0GB in the end (delta: 654.3MB). Free memory was 339.3MB in the beginning and 474.5MB in the end (delta: -135.2MB). Peak memory consumption was 522.5MB. Max. memory is 16.0GB. [2023-08-26 13:05:52,344 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 362.8MB. Free memory is still 339.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 13:05:52,344 INFO L158 Benchmark]: CACSL2BoogieTranslator took 151.65ms. Allocated memory is still 362.8MB. Free memory was 338.8MB in the beginning and 327.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 13:05:52,344 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.52ms. Allocated memory is still 362.8MB. Free memory was 327.5MB in the beginning and 324.4MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:05:52,346 INFO L158 Benchmark]: Boogie Preprocessor took 22.09ms. Allocated memory is still 362.8MB. Free memory was 324.4MB in the beginning and 322.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:05:52,346 INFO L158 Benchmark]: RCFGBuilder took 928.62ms. Allocated memory was 362.8MB in the beginning and 436.2MB in the end (delta: 73.4MB). Free memory was 322.3MB in the beginning and 378.2MB in the end (delta: -56.0MB). Peak memory consumption was 64.1MB. Max. memory is 16.0GB. [2023-08-26 13:05:52,346 INFO L158 Benchmark]: TraceAbstraction took 27435.60ms. Allocated memory was 436.2MB in the beginning and 1.0GB in the end (delta: 580.9MB). Free memory was 377.2MB in the beginning and 474.5MB in the end (delta: -97.4MB). Peak memory consumption was 485.6MB. Max. memory is 16.0GB. [2023-08-26 13:05:52,347 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 362.8MB. Free memory is still 339.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 151.65ms. Allocated memory is still 362.8MB. Free memory was 338.8MB in the beginning and 327.5MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.52ms. Allocated memory is still 362.8MB. Free memory was 327.5MB in the beginning and 324.4MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.09ms. Allocated memory is still 362.8MB. Free memory was 324.4MB in the beginning and 322.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 928.62ms. Allocated memory was 362.8MB in the beginning and 436.2MB in the end (delta: 73.4MB). Free memory was 322.3MB in the beginning and 378.2MB in the end (delta: -56.0MB). Peak memory consumption was 64.1MB. Max. memory is 16.0GB. * TraceAbstraction took 27435.60ms. Allocated memory was 436.2MB in the beginning and 1.0GB in the end (delta: 580.9MB). Free memory was 377.2MB in the beginning and 474.5MB in the end (delta: -97.4MB). Peak memory consumption was 485.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9.6s, 145 PlacesBefore, 38 PlacesAfterwards, 137 TransitionsBefore, 28 TransitionsAfterwards, 378 CoEnabledTransitionPairs, 8 FixpointIterations, 101 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 141 TotalNumberOfCompositions, 703 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 703, independent: 703, independent conditional: 0, independent unconditional: 703, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 230, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 703, independent: 473, independent conditional: 0, independent unconditional: 473, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 230, unknown conditional: 0, unknown unconditional: 230] , Statistics on independence cache: Total cache size (in pairs): 36, Positive cache size: 36, Positive conditional cache size: 0, Positive unconditional cache size: 36, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 165 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 27.3s, OverallIterations: 13, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 9.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 279 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 279 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 546 IncrementalHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 0 mSDtfsCounter, 546 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=97occurred in iteration=10, InterpolantAutomatonStates: 56, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 14.2s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 4149 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 13:05:52,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...