/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:31:21,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:31:21,582 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 17:31:21,586 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:31:21,586 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:31:21,606 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:31:21,607 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:31:21,607 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:31:21,608 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:31:21,608 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:31:21,609 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:31:21,609 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:31:21,609 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:31:21,610 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:31:21,610 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:31:21,610 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:31:21,611 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:31:21,611 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:31:21,611 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:31:21,611 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:31:21,612 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:31:21,612 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:31:21,613 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:31:21,613 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:31:21,613 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:31:21,614 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:31:21,614 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:31:21,614 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:31:21,615 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:31:21,615 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:31:21,615 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:31:21,616 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:31:21,616 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:31:21,616 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:31:21,617 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:31:21,617 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:31:21,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:31:21,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:31:21,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:31:21,925 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:31:21,926 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:31:21,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-26 17:31:23,164 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:31:23,392 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:31:23,409 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/singleton_with-uninit-problems.i [2023-08-26 17:31:23,426 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1161dc32/70f7f1a80d124d568607f3f838bbec3d/FLAGe0f9651c2 [2023-08-26 17:31:23,440 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1161dc32/70f7f1a80d124d568607f3f838bbec3d [2023-08-26 17:31:23,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:31:23,443 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:31:23,444 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:31:23,444 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:31:23,446 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:31:23,447 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:31:23" (1/1) ... [2023-08-26 17:31:23,448 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f8d46db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:23, skipping insertion in model container [2023-08-26 17:31:23,448 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:31:23" (1/1) ... [2023-08-26 17:31:23,491 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:31:23,655 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 17:31:23,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:31:23,963 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:31:23,986 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 17:31:23,989 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [283] [2023-08-26 17:31:23,990 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [283] [2023-08-26 17:31:24,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:31:24,074 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:31:24,075 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:31:24,075 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:31:24,081 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:31:24,082 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24 WrapperNode [2023-08-26 17:31:24,082 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:31:24,083 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:31:24,084 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:31:24,084 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:31:24,089 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,122 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,148 INFO L138 Inliner]: procedures = 325, calls = 54, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2023-08-26 17:31:24,148 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:31:24,149 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:31:24,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:31:24,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:31:24,158 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,166 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,171 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,189 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,193 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,196 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:31:24,196 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:31:24,196 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:31:24,197 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:31:24,197 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (1/1) ... [2023-08-26 17:31:24,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:31:24,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:31:24,234 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 17:31:24,251 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 17:31:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 17:31:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:31:24,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:31:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 17:31:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 17:31:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2023-08-26 17:31:24,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2023-08-26 17:31:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 17:31:24,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 17:31:24,267 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 17:31:24,267 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 17:31:24,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 17:31:24,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 17:31:24,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:31:24,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 17:31:24,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:31:24,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:31:24,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:31:24,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:31:24,271 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 17:31:24,417 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:31:24,419 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:31:24,622 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:31:24,628 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:31:24,628 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 17:31:24,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:31:24 BoogieIcfgContainer [2023-08-26 17:31:24,630 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:31:24,632 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:31:24,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:31:24,635 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:31:24,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:31:23" (1/3) ... [2023-08-26 17:31:24,636 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419e616f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:31:24, skipping insertion in model container [2023-08-26 17:31:24,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:31:24" (2/3) ... [2023-08-26 17:31:24,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419e616f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:31:24, skipping insertion in model container [2023-08-26 17:31:24,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:31:24" (3/3) ... [2023-08-26 17:31:24,638 INFO L112 eAbstractionObserver]: Analyzing ICFG singleton_with-uninit-problems.i [2023-08-26 17:31:24,653 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:31:24,653 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-08-26 17:31:24,653 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:31:24,794 INFO L144 ThreadInstanceAdder]: Constructed 21 joinOtherThreadTransitions. [2023-08-26 17:31:24,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 251 transitions, 609 flow [2023-08-26 17:31:24,885 INFO L124 PetriNetUnfolderBase]: 8/172 cut-off events. [2023-08-26 17:31:24,885 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 17:31:24,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 172 events. 8/172 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 195 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 147. Up to 3 conditions per place. [2023-08-26 17:31:24,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 251 transitions, 609 flow [2023-08-26 17:31:24,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 159 transitions, 369 flow [2023-08-26 17:31:24,898 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:31:24,906 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 159 transitions, 369 flow [2023-08-26 17:31:24,908 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 159 transitions, 369 flow [2023-08-26 17:31:24,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 159 transitions, 369 flow [2023-08-26 17:31:24,943 INFO L124 PetriNetUnfolderBase]: 6/159 cut-off events. [2023-08-26 17:31:24,943 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 17:31:24,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 159 events. 6/159 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 178 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2023-08-26 17:31:24,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 2920 [2023-08-26 17:31:28,445 INFO L134 LiptonReduction]: Checked pairs total: 6797 [2023-08-26 17:31:28,445 INFO L136 LiptonReduction]: Total number of compositions: 129 [2023-08-26 17:31:28,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:31:28,462 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;@2b58dfc5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:31:28,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2023-08-26 17:31:28,464 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:31:28,464 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 17:31:28,464 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:31:28,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:28,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:31:28,465 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:28,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:28,469 INFO L85 PathProgramCache]: Analyzing trace with hash 639, now seen corresponding path program 1 times [2023-08-26 17:31:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:28,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271213224] [2023-08-26 17:31:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:28,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:28,566 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 17:31:28,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:28,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271213224] [2023-08-26 17:31:28,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271213224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:28,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:28,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:31:28,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913940905] [2023-08-26 17:31:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:28,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:31:28,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:31:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:31:28,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 382 [2023-08-26 17:31:28,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 86 transitions, 223 flow. Second operand has 2 states, 2 states have (on average 219.5) internal successors, (439), 2 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:28,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:28,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 382 [2023-08-26 17:31:28,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:31,051 INFO L124 PetriNetUnfolderBase]: 19439/26680 cut-off events. [2023-08-26 17:31:31,052 INFO L125 PetriNetUnfolderBase]: For 961/961 co-relation queries the response was YES. [2023-08-26 17:31:31,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53375 conditions, 26680 events. 19439/26680 cut-off events. For 961/961 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 145183 event pairs, 19095 based on Foata normal form. 0/9506 useless extension candidates. Maximal degree in co-relation 53352. Up to 25309 conditions per place. [2023-08-26 17:31:31,257 INFO L140 encePairwiseOnDemand]: 378/382 looper letters, 63 selfloop transitions, 0 changer transitions 0/82 dead transitions. [2023-08-26 17:31:31,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 82 transitions, 341 flow [2023-08-26 17:31:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:31:31,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:31:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 505 transitions. [2023-08-26 17:31:31,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6609947643979057 [2023-08-26 17:31:31,277 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 505 transitions. [2023-08-26 17:31:31,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 505 transitions. [2023-08-26 17:31:31,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:31,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 505 transitions. [2023-08-26 17:31:31,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 252.5) internal successors, (505), 2 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:31,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:31,293 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 382.0) internal successors, (1146), 3 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:31,295 INFO L175 Difference]: Start difference. First operand has 100 places, 86 transitions, 223 flow. Second operand 2 states and 505 transitions. [2023-08-26 17:31:31,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 82 transitions, 341 flow [2023-08-26 17:31:31,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 82 transitions, 307 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-26 17:31:31,329 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 181 flow [2023-08-26 17:31:31,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=181, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-08-26 17:31:31,334 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -15 predicate places. [2023-08-26 17:31:31,334 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 181 flow [2023-08-26 17:31:31,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 219.5) internal successors, (439), 2 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:31,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:31,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:31:31,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:31:31,335 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:31,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:31,337 INFO L85 PathProgramCache]: Analyzing trace with hash 627459, now seen corresponding path program 1 times [2023-08-26 17:31:31,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:31,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203966162] [2023-08-26 17:31:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:31,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:31,549 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 17:31:31,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:31,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203966162] [2023-08-26 17:31:31,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203966162] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:31,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:31,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:31:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497563129] [2023-08-26 17:31:31,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:31,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:31,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:31,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 382 [2023-08-26 17:31:31,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:31,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:31,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 382 [2023-08-26 17:31:31,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:33,554 INFO L124 PetriNetUnfolderBase]: 21307/28535 cut-off events. [2023-08-26 17:31:33,554 INFO L125 PetriNetUnfolderBase]: For 193/193 co-relation queries the response was YES. [2023-08-26 17:31:33,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56733 conditions, 28535 events. 21307/28535 cut-off events. For 193/193 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 146943 event pairs, 17701 based on Foata normal form. 0/10458 useless extension candidates. Maximal degree in co-relation 56730. Up to 27788 conditions per place. [2023-08-26 17:31:33,689 INFO L140 encePairwiseOnDemand]: 379/382 looper letters, 76 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-26 17:31:33,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 347 flow [2023-08-26 17:31:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 538 transitions. [2023-08-26 17:31:33,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4694589877835951 [2023-08-26 17:31:33,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 538 transitions. [2023-08-26 17:31:33,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 538 transitions. [2023-08-26 17:31:33,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:33,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 538 transitions. [2023-08-26 17:31:33,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:33,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:33,699 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:33,700 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 181 flow. Second operand 3 states and 538 transitions. [2023-08-26 17:31:33,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 347 flow [2023-08-26 17:31:33,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 87 transitions, 347 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:31:33,704 INFO L231 Difference]: Finished difference. Result has 88 places, 82 transitions, 189 flow [2023-08-26 17:31:33,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=88, PETRI_TRANSITIONS=82} [2023-08-26 17:31:33,710 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -12 predicate places. [2023-08-26 17:31:33,710 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 82 transitions, 189 flow [2023-08-26 17:31:33,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:33,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:33,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:31:33,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:31:33,711 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:33,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:33,714 INFO L85 PathProgramCache]: Analyzing trace with hash 627458, now seen corresponding path program 1 times [2023-08-26 17:31:33,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:33,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050245761] [2023-08-26 17:31:33,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:33,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:33,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:33,782 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 17:31:33,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:33,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050245761] [2023-08-26 17:31:33,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050245761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:33,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:33,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:31:33,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938505553] [2023-08-26 17:31:33,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:33,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:33,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:33,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:33,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:33,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 382 [2023-08-26 17:31:33,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 82 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:33,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:33,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 382 [2023-08-26 17:31:33,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:35,159 INFO L124 PetriNetUnfolderBase]: 15572/21005 cut-off events. [2023-08-26 17:31:35,160 INFO L125 PetriNetUnfolderBase]: For 1773/1773 co-relation queries the response was YES. [2023-08-26 17:31:35,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43406 conditions, 21005 events. 15572/21005 cut-off events. For 1773/1773 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 105247 event pairs, 15305 based on Foata normal form. 0/9888 useless extension candidates. Maximal degree in co-relation 43401. Up to 20458 conditions per place. [2023-08-26 17:31:35,264 INFO L140 encePairwiseOnDemand]: 374/382 looper letters, 77 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2023-08-26 17:31:35,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 380 flow [2023-08-26 17:31:35,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:35,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-26 17:31:35,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44589877835951136 [2023-08-26 17:31:35,267 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-26 17:31:35,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-26 17:31:35,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:35,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-26 17:31:35,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:35,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:35,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:35,272 INFO L175 Difference]: Start difference. First operand has 88 places, 82 transitions, 189 flow. Second operand 3 states and 511 transitions. [2023-08-26 17:31:35,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 380 flow [2023-08-26 17:31:35,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 376 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:31:35,274 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 235 flow [2023-08-26 17:31:35,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-08-26 17:31:35,275 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -10 predicate places. [2023-08-26 17:31:35,275 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 235 flow [2023-08-26 17:31:35,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:35,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:35,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:35,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:31:35,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:35,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash -397105202, now seen corresponding path program 1 times [2023-08-26 17:31:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622830362] [2023-08-26 17:31:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:35,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:31:35,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:35,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622830362] [2023-08-26 17:31:35,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622830362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:35,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:35,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:31:35,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946193390] [2023-08-26 17:31:35,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:35,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:35,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:35,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:35,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:35,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 382 [2023-08-26 17:31:35,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 235 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:35,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:35,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 382 [2023-08-26 17:31:35,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:36,585 INFO L124 PetriNetUnfolderBase]: 15566/20992 cut-off events. [2023-08-26 17:31:36,585 INFO L125 PetriNetUnfolderBase]: For 3410/3410 co-relation queries the response was YES. [2023-08-26 17:31:36,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45047 conditions, 20992 events. 15566/20992 cut-off events. For 3410/3410 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 105178 event pairs, 13669 based on Foata normal form. 0/9887 useless extension candidates. Maximal degree in co-relation 45041. Up to 20433 conditions per place. [2023-08-26 17:31:36,669 INFO L140 encePairwiseOnDemand]: 378/382 looper letters, 77 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-26 17:31:36,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 87 transitions, 397 flow [2023-08-26 17:31:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:36,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-08-26 17:31:36,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406631762652705 [2023-08-26 17:31:36,671 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-08-26 17:31:36,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-08-26 17:31:36,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:36,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-08-26 17:31:36,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:36,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:36,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:36,676 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 235 flow. Second operand 3 states and 505 transitions. [2023-08-26 17:31:36,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 87 transitions, 397 flow [2023-08-26 17:31:36,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 87 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:31:36,679 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 221 flow [2023-08-26 17:31:36,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=221, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2023-08-26 17:31:36,680 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -12 predicate places. [2023-08-26 17:31:36,681 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 221 flow [2023-08-26 17:31:36,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:36,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:36,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:36,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:31:36,681 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:36,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:36,682 INFO L85 PathProgramCache]: Analyzing trace with hash -397105201, now seen corresponding path program 1 times [2023-08-26 17:31:36,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:36,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77747295] [2023-08-26 17:31:36,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:36,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:36,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:36,877 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 17:31:36,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77747295] [2023-08-26 17:31:36,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77747295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:36,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:36,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:31:36,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418991248] [2023-08-26 17:31:36,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:36,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:31:36,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:31:36,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:31:36,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 382 [2023-08-26 17:31:36,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 221 flow. Second operand has 4 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:36,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:36,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 382 [2023-08-26 17:31:36,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:38,193 INFO L124 PetriNetUnfolderBase]: 16241/21660 cut-off events. [2023-08-26 17:31:38,193 INFO L125 PetriNetUnfolderBase]: For 3572/3572 co-relation queries the response was YES. [2023-08-26 17:31:38,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46789 conditions, 21660 events. 16241/21660 cut-off events. For 3572/3572 co-relation queries the response was YES. Maximal size of possible extension queue 1284. Compared 105816 event pairs, 14263 based on Foata normal form. 0/9963 useless extension candidates. Maximal degree in co-relation 46783. Up to 21353 conditions per place. [2023-08-26 17:31:38,278 INFO L140 encePairwiseOnDemand]: 378/382 looper letters, 78 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-26 17:31:38,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 85 transitions, 385 flow [2023-08-26 17:31:38,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:38,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:38,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-08-26 17:31:38,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787085514834206 [2023-08-26 17:31:38,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-08-26 17:31:38,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-08-26 17:31:38,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:38,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-08-26 17:31:38,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:38,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:38,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:38,288 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 221 flow. Second operand 3 states and 434 transitions. [2023-08-26 17:31:38,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 85 transitions, 385 flow [2023-08-26 17:31:38,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 85 transitions, 381 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:31:38,293 INFO L231 Difference]: Finished difference. Result has 86 places, 83 transitions, 217 flow [2023-08-26 17:31:38,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=86, PETRI_TRANSITIONS=83} [2023-08-26 17:31:38,295 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -14 predicate places. [2023-08-26 17:31:38,296 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 83 transitions, 217 flow [2023-08-26 17:31:38,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:38,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:38,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:38,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:31:38,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:38,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:38,297 INFO L85 PathProgramCache]: Analyzing trace with hash -641748692, now seen corresponding path program 1 times [2023-08-26 17:31:38,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:38,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997260018] [2023-08-26 17:31:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:38,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:38,657 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 17:31:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:38,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997260018] [2023-08-26 17:31:38,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997260018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:38,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:38,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 17:31:38,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781204955] [2023-08-26 17:31:38,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:38,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 17:31:38,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 17:31:38,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:31:38,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 382 [2023-08-26 17:31:38,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 83 transitions, 217 flow. Second operand has 7 states, 7 states have (on average 117.57142857142857) internal successors, (823), 7 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:38,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:38,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 382 [2023-08-26 17:31:38,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:39,571 INFO L124 PetriNetUnfolderBase]: 10262/13886 cut-off events. [2023-08-26 17:31:39,572 INFO L125 PetriNetUnfolderBase]: For 3520/3520 co-relation queries the response was YES. [2023-08-26 17:31:39,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29526 conditions, 13886 events. 10262/13886 cut-off events. For 3520/3520 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 65900 event pairs, 8375 based on Foata normal form. 1708/7794 useless extension candidates. Maximal degree in co-relation 29520. Up to 13677 conditions per place. [2023-08-26 17:31:39,625 INFO L140 encePairwiseOnDemand]: 372/382 looper letters, 74 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2023-08-26 17:31:39,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 396 flow [2023-08-26 17:31:39,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:31:39,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:31:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2023-08-26 17:31:39,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3481675392670157 [2023-08-26 17:31:39,628 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2023-08-26 17:31:39,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2023-08-26 17:31:39,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:39,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2023-08-26 17:31:39,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:39,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:39,634 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 382.0) internal successors, (2292), 6 states have internal predecessors, (2292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:39,634 INFO L175 Difference]: Start difference. First operand has 86 places, 83 transitions, 217 flow. Second operand 5 states and 665 transitions. [2023-08-26 17:31:39,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 396 flow [2023-08-26 17:31:39,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 390 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:31:39,637 INFO L231 Difference]: Finished difference. Result has 88 places, 83 transitions, 248 flow [2023-08-26 17:31:39,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=88, PETRI_TRANSITIONS=83} [2023-08-26 17:31:39,638 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -12 predicate places. [2023-08-26 17:31:39,638 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 83 transitions, 248 flow [2023-08-26 17:31:39,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 117.57142857142857) internal successors, (823), 7 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:39,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:39,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:39,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:31:39,639 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:39,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:39,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1478134147, now seen corresponding path program 1 times [2023-08-26 17:31:39,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:39,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152338081] [2023-08-26 17:31:39,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:39,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:39,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:39,845 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 17:31:39,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152338081] [2023-08-26 17:31:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152338081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:39,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:39,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:31:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505509671] [2023-08-26 17:31:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:39,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:39,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:39,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:39,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:39,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 382 [2023-08-26 17:31:39,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 83 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:39,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:39,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 382 [2023-08-26 17:31:39,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:40,532 INFO L124 PetriNetUnfolderBase]: 8043/11153 cut-off events. [2023-08-26 17:31:40,532 INFO L125 PetriNetUnfolderBase]: For 1493/1493 co-relation queries the response was YES. [2023-08-26 17:31:40,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23576 conditions, 11153 events. 8043/11153 cut-off events. For 1493/1493 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 53352 event pairs, 6498 based on Foata normal form. 0/5291 useless extension candidates. Maximal degree in co-relation 23569. Up to 10773 conditions per place. [2023-08-26 17:31:40,580 INFO L140 encePairwiseOnDemand]: 378/382 looper letters, 72 selfloop transitions, 2 changer transitions 0/82 dead transitions. [2023-08-26 17:31:40,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 82 transitions, 396 flow [2023-08-26 17:31:40,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-26 17:31:40,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354275741710297 [2023-08-26 17:31:40,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-26 17:31:40,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-26 17:31:40,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:40,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-26 17:31:40,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:40,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:40,586 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:40,586 INFO L175 Difference]: Start difference. First operand has 88 places, 83 transitions, 248 flow. Second operand 3 states and 499 transitions. [2023-08-26 17:31:40,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 82 transitions, 396 flow [2023-08-26 17:31:40,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 82 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:31:40,590 INFO L231 Difference]: Finished difference. Result has 86 places, 81 transitions, 245 flow [2023-08-26 17:31:40,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=245, PETRI_PLACES=86, PETRI_TRANSITIONS=81} [2023-08-26 17:31:40,591 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -14 predicate places. [2023-08-26 17:31:40,591 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 81 transitions, 245 flow [2023-08-26 17:31:40,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:40,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:40,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:40,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:31:40,592 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:40,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1478134146, now seen corresponding path program 1 times [2023-08-26 17:31:40,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:40,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635248023] [2023-08-26 17:31:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:40,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:40,910 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 17:31:40,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:40,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635248023] [2023-08-26 17:31:40,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635248023] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:40,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:40,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:31:40,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798083209] [2023-08-26 17:31:40,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:40,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:31:40,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:40,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:31:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:31:40,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 382 [2023-08-26 17:31:40,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 81 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:40,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:40,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 382 [2023-08-26 17:31:40,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:41,347 INFO L124 PetriNetUnfolderBase]: 6676/9272 cut-off events. [2023-08-26 17:31:41,348 INFO L125 PetriNetUnfolderBase]: For 1320/1320 co-relation queries the response was YES. [2023-08-26 17:31:41,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19811 conditions, 9272 events. 6676/9272 cut-off events. For 1320/1320 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 42637 event pairs, 5304 based on Foata normal form. 0/4552 useless extension candidates. Maximal degree in co-relation 19804. Up to 9060 conditions per place. [2023-08-26 17:31:41,382 INFO L140 encePairwiseOnDemand]: 377/382 looper letters, 71 selfloop transitions, 4 changer transitions 0/80 dead transitions. [2023-08-26 17:31:41,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 80 transitions, 395 flow [2023-08-26 17:31:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:31:41,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:31:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 544 transitions. [2023-08-26 17:31:41,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35602094240837695 [2023-08-26 17:31:41,384 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 544 transitions. [2023-08-26 17:31:41,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 544 transitions. [2023-08-26 17:31:41,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:41,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 544 transitions. [2023-08-26 17:31:41,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:41,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:41,388 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:41,388 INFO L175 Difference]: Start difference. First operand has 86 places, 81 transitions, 245 flow. Second operand 4 states and 544 transitions. [2023-08-26 17:31:41,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 80 transitions, 395 flow [2023-08-26 17:31:41,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 80 transitions, 391 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:31:41,392 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 245 flow [2023-08-26 17:31:41,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-26 17:31:41,393 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -15 predicate places. [2023-08-26 17:31:41,393 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 245 flow [2023-08-26 17:31:41,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:41,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:41,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:41,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:31:41,394 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:41,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:41,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1147276292, now seen corresponding path program 1 times [2023-08-26 17:31:41,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:41,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013165960] [2023-08-26 17:31:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:41,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:41,542 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 17:31:41,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:41,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013165960] [2023-08-26 17:31:41,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013165960] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:41,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:41,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:31:41,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374167953] [2023-08-26 17:31:41,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:41,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:41,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:41,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:41,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 382 [2023-08-26 17:31:41,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 245 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:41,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:41,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 382 [2023-08-26 17:31:41,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:41,992 INFO L124 PetriNetUnfolderBase]: 6240/8700 cut-off events. [2023-08-26 17:31:41,993 INFO L125 PetriNetUnfolderBase]: For 1234/1234 co-relation queries the response was YES. [2023-08-26 17:31:41,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18542 conditions, 8700 events. 6240/8700 cut-off events. For 1234/1234 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 40042 event pairs, 4957 based on Foata normal form. 0/4388 useless extension candidates. Maximal degree in co-relation 18535. Up to 8445 conditions per place. [2023-08-26 17:31:42,018 INFO L140 encePairwiseOnDemand]: 378/382 looper letters, 69 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-26 17:31:42,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 78 transitions, 387 flow [2023-08-26 17:31:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-26 17:31:42,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328097731239092 [2023-08-26 17:31:42,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-26 17:31:42,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-26 17:31:42,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:42,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-26 17:31:42,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,024 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 245 flow. Second operand 3 states and 496 transitions. [2023-08-26 17:31:42,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 78 transitions, 387 flow [2023-08-26 17:31:42,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 379 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:31:42,027 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 237 flow [2023-08-26 17:31:42,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2023-08-26 17:31:42,028 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -18 predicate places. [2023-08-26 17:31:42,028 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 237 flow [2023-08-26 17:31:42,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:42,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:42,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 17:31:42,029 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:42,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:42,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1147276291, now seen corresponding path program 1 times [2023-08-26 17:31:42,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:42,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226605328] [2023-08-26 17:31:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:42,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:42,240 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 17:31:42,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:42,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226605328] [2023-08-26 17:31:42,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226605328] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:42,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:42,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:31:42,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395872052] [2023-08-26 17:31:42,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:42,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:31:42,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:42,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:31:42,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:31:42,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 382 [2023-08-26 17:31:42,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 237 flow. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:42,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 382 [2023-08-26 17:31:42,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:42,689 INFO L124 PetriNetUnfolderBase]: 5952/8276 cut-off events. [2023-08-26 17:31:42,689 INFO L125 PetriNetUnfolderBase]: For 1184/1184 co-relation queries the response was YES. [2023-08-26 17:31:42,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17683 conditions, 8276 events. 5952/8276 cut-off events. For 1184/1184 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 37682 event pairs, 4714 based on Foata normal form. 0/4220 useless extension candidates. Maximal degree in co-relation 17676. Up to 8061 conditions per place. [2023-08-26 17:31:42,710 INFO L140 encePairwiseOnDemand]: 377/382 looper letters, 69 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2023-08-26 17:31:42,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 78 transitions, 397 flow [2023-08-26 17:31:42,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:31:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:31:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 541 transitions. [2023-08-26 17:31:42,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3540575916230366 [2023-08-26 17:31:42,712 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 541 transitions. [2023-08-26 17:31:42,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 541 transitions. [2023-08-26 17:31:42,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:42,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 541 transitions. [2023-08-26 17:31:42,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.25) internal successors, (541), 4 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,716 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,716 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 237 flow. Second operand 4 states and 541 transitions. [2023-08-26 17:31:42,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 78 transitions, 397 flow [2023-08-26 17:31:42,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 393 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:31:42,719 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 237 flow [2023-08-26 17:31:42,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=237, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-08-26 17:31:42,719 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -19 predicate places. [2023-08-26 17:31:42,719 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 237 flow [2023-08-26 17:31:42,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:42,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 17:31:42,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:42,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1147276229, now seen corresponding path program 1 times [2023-08-26 17:31:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:42,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836879520] [2023-08-26 17:31:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:42,766 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 17:31:42,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:42,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836879520] [2023-08-26 17:31:42,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836879520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:42,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:42,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:31:42,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035064057] [2023-08-26 17:31:42,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:42,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:42,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:42,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:42,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:42,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 382 [2023-08-26 17:31:42,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 237 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:42,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 382 [2023-08-26 17:31:42,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:42,980 INFO L124 PetriNetUnfolderBase]: 2046/3012 cut-off events. [2023-08-26 17:31:42,981 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2023-08-26 17:31:42,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6489 conditions, 3012 events. 2046/3012 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12086 event pairs, 1551 based on Foata normal form. 0/1908 useless extension candidates. Maximal degree in co-relation 6482. Up to 2847 conditions per place. [2023-08-26 17:31:42,989 INFO L140 encePairwiseOnDemand]: 375/382 looper letters, 63 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-26 17:31:42,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 367 flow [2023-08-26 17:31:42,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:42,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:42,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-26 17:31:42,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41710296684118675 [2023-08-26 17:31:42,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-26 17:31:42,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-26 17:31:42,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:42,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-26 17:31:42,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,994 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 237 flow. Second operand 3 states and 478 transitions. [2023-08-26 17:31:42,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 367 flow [2023-08-26 17:31:42,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 73 transitions, 359 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:31:42,996 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 227 flow [2023-08-26 17:31:42,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=227, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2023-08-26 17:31:42,997 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -24 predicate places. [2023-08-26 17:31:42,997 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 227 flow [2023-08-26 17:31:42,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:42,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:42,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:42,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 17:31:42,998 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:42,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1147276227, now seen corresponding path program 1 times [2023-08-26 17:31:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:42,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212152776] [2023-08-26 17:31:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:42,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:43,073 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 17:31:43,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:43,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212152776] [2023-08-26 17:31:43,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212152776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:43,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:43,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:31:43,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883879642] [2023-08-26 17:31:43,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:43,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:43,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:43,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:43,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:43,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 382 [2023-08-26 17:31:43,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 227 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:43,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 382 [2023-08-26 17:31:43,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:43,180 INFO L124 PetriNetUnfolderBase]: 480/814 cut-off events. [2023-08-26 17:31:43,180 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2023-08-26 17:31:43,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1817 conditions, 814 events. 480/814 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2522 event pairs, 319 based on Foata normal form. 0/722 useless extension candidates. Maximal degree in co-relation 1810. Up to 739 conditions per place. [2023-08-26 17:31:43,182 INFO L140 encePairwiseOnDemand]: 376/382 looper letters, 58 selfloop transitions, 1 changer transitions 0/68 dead transitions. [2023-08-26 17:31:43,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 341 flow [2023-08-26 17:31:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:43,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-26 17:31:43,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44415357766143104 [2023-08-26 17:31:43,184 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-26 17:31:43,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-26 17:31:43,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:43,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-26 17:31:43,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,188 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,188 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 227 flow. Second operand 3 states and 509 transitions. [2023-08-26 17:31:43,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 341 flow [2023-08-26 17:31:43,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 335 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:31:43,190 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 213 flow [2023-08-26 17:31:43,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2023-08-26 17:31:43,190 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -29 predicate places. [2023-08-26 17:31:43,190 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 213 flow [2023-08-26 17:31:43,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:43,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:43,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 17:31:43,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:43,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:43,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1274062778, now seen corresponding path program 1 times [2023-08-26 17:31:43,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:43,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205992025] [2023-08-26 17:31:43,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:43,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:43,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:43,340 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 17:31:43,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:43,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205992025] [2023-08-26 17:31:43,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205992025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:43,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:43,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:31:43,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269417667] [2023-08-26 17:31:43,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:43,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:31:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:31:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:31:43,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 382 [2023-08-26 17:31:43,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:43,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 382 [2023-08-26 17:31:43,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:43,458 INFO L124 PetriNetUnfolderBase]: 448/750 cut-off events. [2023-08-26 17:31:43,459 INFO L125 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2023-08-26 17:31:43,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1691 conditions, 750 events. 448/750 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2215 event pairs, 293 based on Foata normal form. 0/676 useless extension candidates. Maximal degree in co-relation 1684. Up to 674 conditions per place. [2023-08-26 17:31:43,461 INFO L140 encePairwiseOnDemand]: 375/382 looper letters, 56 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-08-26 17:31:43,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 65 transitions, 343 flow [2023-08-26 17:31:43,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:31:43,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:31:43,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 530 transitions. [2023-08-26 17:31:43,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3468586387434555 [2023-08-26 17:31:43,463 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 530 transitions. [2023-08-26 17:31:43,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 530 transitions. [2023-08-26 17:31:43,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:43,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 530 transitions. [2023-08-26 17:31:43,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,467 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,467 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 213 flow. Second operand 4 states and 530 transitions. [2023-08-26 17:31:43,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 65 transitions, 343 flow [2023-08-26 17:31:43,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 65 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:31:43,469 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 212 flow [2023-08-26 17:31:43,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2023-08-26 17:31:43,469 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -31 predicate places. [2023-08-26 17:31:43,469 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 212 flow [2023-08-26 17:31:43,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:43,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:43,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 17:31:43,470 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:43,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:43,471 INFO L85 PathProgramCache]: Analyzing trace with hash -308637433, now seen corresponding path program 1 times [2023-08-26 17:31:43,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:43,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908066914] [2023-08-26 17:31:43,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:43,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:43,574 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 17:31:43,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:43,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908066914] [2023-08-26 17:31:43,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908066914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:43,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:43,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:31:43,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210545609] [2023-08-26 17:31:43,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:43,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:31:43,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:31:43,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:31:43,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 382 [2023-08-26 17:31:43,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:43,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 382 [2023-08-26 17:31:43,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:43,682 INFO L124 PetriNetUnfolderBase]: 376/638 cut-off events. [2023-08-26 17:31:43,682 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-08-26 17:31:43,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 638 events. 376/638 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1758 event pairs, 242 based on Foata normal form. 0/604 useless extension candidates. Maximal degree in co-relation 1448. Up to 559 conditions per place. [2023-08-26 17:31:43,684 INFO L140 encePairwiseOnDemand]: 375/382 looper letters, 52 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2023-08-26 17:31:43,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 61 transitions, 334 flow [2023-08-26 17:31:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:31:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:31:43,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 530 transitions. [2023-08-26 17:31:43,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3468586387434555 [2023-08-26 17:31:43,686 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 530 transitions. [2023-08-26 17:31:43,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 530 transitions. [2023-08-26 17:31:43,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:43,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 530 transitions. [2023-08-26 17:31:43,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.5) internal successors, (530), 4 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,690 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 382.0) internal successors, (1910), 5 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,690 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 212 flow. Second operand 4 states and 530 transitions. [2023-08-26 17:31:43,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 61 transitions, 334 flow [2023-08-26 17:31:43,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 61 transitions, 326 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:31:43,692 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 204 flow [2023-08-26 17:31:43,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=204, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-08-26 17:31:43,692 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -35 predicate places. [2023-08-26 17:31:43,692 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 204 flow [2023-08-26 17:31:43,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:43,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:43,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:43,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 17:31:43,693 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:43,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:43,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1624965449, now seen corresponding path program 1 times [2023-08-26 17:31:43,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:43,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573020601] [2023-08-26 17:31:43,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:43,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:43,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:44,317 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 17:31:44,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:44,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573020601] [2023-08-26 17:31:44,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573020601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:44,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 17:31:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445914314] [2023-08-26 17:31:44,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:44,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 17:31:44,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:44,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 17:31:44,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-08-26 17:31:44,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 382 [2023-08-26 17:31:44,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 204 flow. Second operand has 15 states, 15 states have (on average 120.33333333333333) internal successors, (1805), 15 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:44,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:44,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 382 [2023-08-26 17:31:44,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:44,506 INFO L124 PetriNetUnfolderBase]: 375/636 cut-off events. [2023-08-26 17:31:44,506 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-26 17:31:44,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 636 events. 375/636 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1756 event pairs, 236 based on Foata normal form. 1/603 useless extension candidates. Maximal degree in co-relation 1441. Up to 547 conditions per place. [2023-08-26 17:31:44,508 INFO L140 encePairwiseOnDemand]: 368/382 looper letters, 49 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2023-08-26 17:31:44,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 373 flow [2023-08-26 17:31:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 17:31:44,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 17:31:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1360 transitions. [2023-08-26 17:31:44,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3236554021894336 [2023-08-26 17:31:44,512 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1360 transitions. [2023-08-26 17:31:44,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1360 transitions. [2023-08-26 17:31:44,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:44,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1360 transitions. [2023-08-26 17:31:44,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 123.63636363636364) internal successors, (1360), 11 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:44,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 382.0) internal successors, (4584), 12 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:44,521 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 382.0) internal successors, (4584), 12 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:44,521 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 204 flow. Second operand 11 states and 1360 transitions. [2023-08-26 17:31:44,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 373 flow [2023-08-26 17:31:44,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:31:44,523 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 250 flow [2023-08-26 17:31:44,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=250, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2023-08-26 17:31:44,524 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -26 predicate places. [2023-08-26 17:31:44,524 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 250 flow [2023-08-26 17:31:44,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.33333333333333) internal successors, (1805), 15 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:44,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:44,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:44,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 17:31:44,525 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:44,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:44,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1165677473, now seen corresponding path program 1 times [2023-08-26 17:31:44,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:44,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820755610] [2023-08-26 17:31:44,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:44,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:45,080 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 17:31:45,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:45,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820755610] [2023-08-26 17:31:45,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820755610] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:45,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:45,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 17:31:45,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550265689] [2023-08-26 17:31:45,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:45,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 17:31:45,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 17:31:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2023-08-26 17:31:45,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 382 [2023-08-26 17:31:45,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 250 flow. Second operand has 15 states, 15 states have (on average 120.4) internal successors, (1806), 15 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:45,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:45,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 382 [2023-08-26 17:31:45,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:45,259 INFO L124 PetriNetUnfolderBase]: 374/634 cut-off events. [2023-08-26 17:31:45,260 INFO L125 PetriNetUnfolderBase]: For 160/160 co-relation queries the response was YES. [2023-08-26 17:31:45,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1474 conditions, 634 events. 374/634 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1754 event pairs, 235 based on Foata normal form. 1/601 useless extension candidates. Maximal degree in co-relation 1466. Up to 547 conditions per place. [2023-08-26 17:31:45,262 INFO L140 encePairwiseOnDemand]: 368/382 looper letters, 49 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2023-08-26 17:31:45,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 70 transitions, 424 flow [2023-08-26 17:31:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 17:31:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 17:31:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1478 transitions. [2023-08-26 17:31:45,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32242582897033156 [2023-08-26 17:31:45,266 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1478 transitions. [2023-08-26 17:31:45,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1478 transitions. [2023-08-26 17:31:45,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:45,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1478 transitions. [2023-08-26 17:31:45,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 123.16666666666667) internal successors, (1478), 12 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:45,286 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 382.0) internal successors, (4966), 13 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:45,288 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 382.0) internal successors, (4966), 13 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:45,288 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 250 flow. Second operand 12 states and 1478 transitions. [2023-08-26 17:31:45,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 70 transitions, 424 flow [2023-08-26 17:31:45,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 70 transitions, 403 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 17:31:45,290 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 287 flow [2023-08-26 17:31:45,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=287, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2023-08-26 17:31:45,292 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -21 predicate places. [2023-08-26 17:31:45,292 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 287 flow [2023-08-26 17:31:45,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.4) internal successors, (1806), 15 states have internal predecessors, (1806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:45,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:45,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:45,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 17:31:45,293 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:45,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:45,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1776258539, now seen corresponding path program 1 times [2023-08-26 17:31:45,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:45,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509244087] [2023-08-26 17:31:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:45,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:45,864 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 17:31:45,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:45,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509244087] [2023-08-26 17:31:45,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509244087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:45,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:45,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 17:31:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879512383] [2023-08-26 17:31:45,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:45,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 17:31:45,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:45,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 17:31:45,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2023-08-26 17:31:45,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 382 [2023-08-26 17:31:45,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 287 flow. Second operand has 15 states, 15 states have (on average 120.46666666666667) internal successors, (1807), 15 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:45,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:45,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 382 [2023-08-26 17:31:45,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:46,073 INFO L124 PetriNetUnfolderBase]: 373/632 cut-off events. [2023-08-26 17:31:46,073 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-26 17:31:46,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 632 events. 373/632 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1744 event pairs, 234 based on Foata normal form. 1/599 useless extension candidates. Maximal degree in co-relation 1477. Up to 547 conditions per place. [2023-08-26 17:31:46,075 INFO L140 encePairwiseOnDemand]: 369/382 looper letters, 51 selfloop transitions, 15 changer transitions 0/71 dead transitions. [2023-08-26 17:31:46,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 71 transitions, 466 flow [2023-08-26 17:31:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 17:31:46,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 17:31:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1596 transitions. [2023-08-26 17:31:46,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32138542086186067 [2023-08-26 17:31:46,079 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1596 transitions. [2023-08-26 17:31:46,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1596 transitions. [2023-08-26 17:31:46,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:46,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1596 transitions. [2023-08-26 17:31:46,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 122.76923076923077) internal successors, (1596), 13 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 382.0) internal successors, (5348), 14 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,088 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 382.0) internal successors, (5348), 14 states have internal predecessors, (5348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,088 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 287 flow. Second operand 13 states and 1596 transitions. [2023-08-26 17:31:46,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 71 transitions, 466 flow [2023-08-26 17:31:46,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 71 transitions, 441 flow, removed 0 selfloop flow, removed 9 redundant places. [2023-08-26 17:31:46,091 INFO L231 Difference]: Finished difference. Result has 84 places, 61 transitions, 318 flow [2023-08-26 17:31:46,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=318, PETRI_PLACES=84, PETRI_TRANSITIONS=61} [2023-08-26 17:31:46,091 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -16 predicate places. [2023-08-26 17:31:46,091 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 61 transitions, 318 flow [2023-08-26 17:31:46,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.46666666666667) internal successors, (1807), 15 states have internal predecessors, (1807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:46,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:46,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 17:31:46,092 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:46,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:46,093 INFO L85 PathProgramCache]: Analyzing trace with hash -770559625, now seen corresponding path program 1 times [2023-08-26 17:31:46,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:46,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789650552] [2023-08-26 17:31:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:46,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:46,636 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 17:31:46,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:46,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789650552] [2023-08-26 17:31:46,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789650552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:46,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:46,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 17:31:46,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680557190] [2023-08-26 17:31:46,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:46,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 17:31:46,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:46,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 17:31:46,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-08-26 17:31:46,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 382 [2023-08-26 17:31:46,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 61 transitions, 318 flow. Second operand has 15 states, 15 states have (on average 120.53333333333333) internal successors, (1808), 15 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:46,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 382 [2023-08-26 17:31:46,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:46,853 INFO L124 PetriNetUnfolderBase]: 373/631 cut-off events. [2023-08-26 17:31:46,853 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2023-08-26 17:31:46,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493 conditions, 631 events. 373/631 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1741 event pairs, 234 based on Foata normal form. 1/598 useless extension candidates. Maximal degree in co-relation 1481. Up to 547 conditions per place. [2023-08-26 17:31:46,856 INFO L140 encePairwiseOnDemand]: 370/382 looper letters, 48 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2023-08-26 17:31:46,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 67 transitions, 456 flow [2023-08-26 17:31:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 17:31:46,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 17:31:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1473 transitions. [2023-08-26 17:31:46,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213350785340314 [2023-08-26 17:31:46,860 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1473 transitions. [2023-08-26 17:31:46,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1473 transitions. [2023-08-26 17:31:46,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:46,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1473 transitions. [2023-08-26 17:31:46,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 122.75) internal successors, (1473), 12 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 382.0) internal successors, (4966), 13 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,869 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 382.0) internal successors, (4966), 13 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,870 INFO L175 Difference]: Start difference. First operand has 84 places, 61 transitions, 318 flow. Second operand 12 states and 1473 transitions. [2023-08-26 17:31:46,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 67 transitions, 456 flow [2023-08-26 17:31:46,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 67 transitions, 403 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-26 17:31:46,872 INFO L231 Difference]: Finished difference. Result has 80 places, 60 transitions, 281 flow [2023-08-26 17:31:46,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=281, PETRI_PLACES=80, PETRI_TRANSITIONS=60} [2023-08-26 17:31:46,873 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -20 predicate places. [2023-08-26 17:31:46,873 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 60 transitions, 281 flow [2023-08-26 17:31:46,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.53333333333333) internal successors, (1808), 15 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:46,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:46,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:46,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 17:31:46,874 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:46,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:46,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1714193239, now seen corresponding path program 1 times [2023-08-26 17:31:46,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:46,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603769436] [2023-08-26 17:31:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:46,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:46,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:47,016 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 17:31:47,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:47,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603769436] [2023-08-26 17:31:47,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603769436] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:47,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:47,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:31:47,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670334753] [2023-08-26 17:31:47,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:47,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:47,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:47,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:47,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:47,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 382 [2023-08-26 17:31:47,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 60 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:47,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 382 [2023-08-26 17:31:47,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:47,185 INFO L124 PetriNetUnfolderBase]: 590/1006 cut-off events. [2023-08-26 17:31:47,186 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2023-08-26 17:31:47,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2337 conditions, 1006 events. 590/1006 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3548 event pairs, 193 based on Foata normal form. 0/945 useless extension candidates. Maximal degree in co-relation 2328. Up to 539 conditions per place. [2023-08-26 17:31:47,189 INFO L140 encePairwiseOnDemand]: 374/382 looper letters, 80 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2023-08-26 17:31:47,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 646 flow [2023-08-26 17:31:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:47,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-08-26 17:31:47,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261780104712042 [2023-08-26 17:31:47,192 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-08-26 17:31:47,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-08-26 17:31:47,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:47,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-08-26 17:31:47,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,208 INFO L175 Difference]: Start difference. First operand has 80 places, 60 transitions, 281 flow. Second operand 3 states and 603 transitions. [2023-08-26 17:31:47,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 646 flow [2023-08-26 17:31:47,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 97 transitions, 604 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-08-26 17:31:47,211 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 311 flow [2023-08-26 17:31:47,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=311, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-08-26 17:31:47,212 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -27 predicate places. [2023-08-26 17:31:47,212 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 311 flow [2023-08-26 17:31:47,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:47,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:47,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 17:31:47,212 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:47,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:47,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1917564654, now seen corresponding path program 1 times [2023-08-26 17:31:47,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:47,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843223530] [2023-08-26 17:31:47,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:47,675 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 17:31:47,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:47,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843223530] [2023-08-26 17:31:47,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843223530] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:47,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:47,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-08-26 17:31:47,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809599671] [2023-08-26 17:31:47,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:47,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 17:31:47,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 17:31:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-26 17:31:47,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 382 [2023-08-26 17:31:47,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 311 flow. Second operand has 13 states, 13 states have (on average 125.07692307692308) internal successors, (1626), 13 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:47,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 382 [2023-08-26 17:31:47,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:47,880 INFO L124 PetriNetUnfolderBase]: 593/1012 cut-off events. [2023-08-26 17:31:47,880 INFO L125 PetriNetUnfolderBase]: For 814/814 co-relation queries the response was YES. [2023-08-26 17:31:47,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3028 conditions, 1012 events. 593/1012 cut-off events. For 814/814 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3523 event pairs, 154 based on Foata normal form. 4/958 useless extension candidates. Maximal degree in co-relation 3018. Up to 883 conditions per place. [2023-08-26 17:31:47,883 INFO L140 encePairwiseOnDemand]: 371/382 looper letters, 54 selfloop transitions, 13 changer transitions 1/73 dead transitions. [2023-08-26 17:31:47,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 471 flow [2023-08-26 17:31:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 17:31:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 17:31:47,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1521 transitions. [2023-08-26 17:31:47,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3318062827225131 [2023-08-26 17:31:47,887 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1521 transitions. [2023-08-26 17:31:47,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1521 transitions. [2023-08-26 17:31:47,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:47,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1521 transitions. [2023-08-26 17:31:47,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 126.75) internal successors, (1521), 12 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 382.0) internal successors, (4966), 13 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,895 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 382.0) internal successors, (4966), 13 states have internal predecessors, (4966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,895 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 311 flow. Second operand 12 states and 1521 transitions. [2023-08-26 17:31:47,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 471 flow [2023-08-26 17:31:47,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 73 transitions, 457 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:31:47,899 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 317 flow [2023-08-26 17:31:47,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=317, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2023-08-26 17:31:47,900 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -19 predicate places. [2023-08-26 17:31:47,900 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 317 flow [2023-08-26 17:31:47,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 125.07692307692308) internal successors, (1626), 13 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:47,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:31:47,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:47,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 17:31:47,901 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2023-08-26 17:31:47,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:31:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -2131039466, now seen corresponding path program 1 times [2023-08-26 17:31:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:31:47,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975439494] [2023-08-26 17:31:47,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:31:47,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:31:47,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:31:48,017 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 17:31:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:31:48,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975439494] [2023-08-26 17:31:48,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975439494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:31:48,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:31:48,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:31:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367975917] [2023-08-26 17:31:48,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:31:48,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:31:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:31:48,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:31:48,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:31:48,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 382 [2023-08-26 17:31:48,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 317 flow. Second operand has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:48,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:31:48,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 382 [2023-08-26 17:31:48,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:31:48,150 INFO L124 PetriNetUnfolderBase]: 535/944 cut-off events. [2023-08-26 17:31:48,150 INFO L125 PetriNetUnfolderBase]: For 437/437 co-relation queries the response was YES. [2023-08-26 17:31:48,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2596 conditions, 944 events. 535/944 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3481 event pairs, 190 based on Foata normal form. 2/882 useless extension candidates. Maximal degree in co-relation 2586. Up to 674 conditions per place. [2023-08-26 17:31:48,153 INFO L140 encePairwiseOnDemand]: 375/382 looper letters, 0 selfloop transitions, 0 changer transitions 97/97 dead transitions. [2023-08-26 17:31:48,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 97 transitions, 679 flow [2023-08-26 17:31:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:31:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:31:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-26 17:31:48,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5209424083769634 [2023-08-26 17:31:48,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-26 17:31:48,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-26 17:31:48,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:31:48,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-26 17:31:48,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:48,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:48,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 382.0) internal successors, (1528), 4 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:48,157 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 317 flow. Second operand 3 states and 597 transitions. [2023-08-26 17:31:48,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 97 transitions, 679 flow [2023-08-26 17:31:48,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 643 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-26 17:31:48,160 INFO L231 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2023-08-26 17:31:48,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=382, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2023-08-26 17:31:48,160 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -28 predicate places. [2023-08-26 17:31:48,160 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2023-08-26 17:31:48,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:31:48,163 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 72 remaining) [2023-08-26 17:31:48,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 72 remaining) [2023-08-26 17:31:48,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 72 remaining) [2023-08-26 17:31:48,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 72 remaining) [2023-08-26 17:31:48,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 72 remaining) [2023-08-26 17:31:48,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 72 remaining) [2023-08-26 17:31:48,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 72 remaining) [2023-08-26 17:31:48,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 72 remaining) [2023-08-26 17:31:48,165 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 72 remaining) [2023-08-26 17:31:48,166 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (51 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err6INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err7INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err10INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (47 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 72 remaining) [2023-08-26 17:31:48,167 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (34 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (33 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 72 remaining) [2023-08-26 17:31:48,168 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 72 remaining) [2023-08-26 17:31:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Thread1of1ForFork2Err0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Thread1of1ForFork2Err2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Thread1of1ForFork2Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Thread1of1ForFork2Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread0Thread1of1ForFork2Err9INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 72 remaining) [2023-08-26 17:31:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 72 remaining) [2023-08-26 17:31:48,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 17:31:48,171 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:31:48,175 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:31:48,175 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:31:48,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:31:48 BasicIcfg [2023-08-26 17:31:48,178 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:31:48,178 INFO L158 Benchmark]: Toolchain (without parser) took 24735.39ms. Allocated memory was 373.3MB in the beginning and 9.6GB in the end (delta: 9.2GB). Free memory was 329.0MB in the beginning and 8.5GB in the end (delta: -8.2GB). Peak memory consumption was 1.1GB. Max. memory is 16.0GB. [2023-08-26 17:31:48,178 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 373.3MB. Free memory was 351.0MB in the beginning and 350.8MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:31:48,179 INFO L158 Benchmark]: CACSL2BoogieTranslator took 638.64ms. Allocated memory is still 373.3MB. Free memory was 329.0MB in the beginning and 295.3MB in the end (delta: 33.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-08-26 17:31:48,179 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.96ms. Allocated memory is still 373.3MB. Free memory was 295.3MB in the beginning and 293.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:31:48,179 INFO L158 Benchmark]: Boogie Preprocessor took 46.33ms. Allocated memory is still 373.3MB. Free memory was 293.4MB in the beginning and 291.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:31:48,179 INFO L158 Benchmark]: RCFGBuilder took 433.91ms. Allocated memory is still 373.3MB. Free memory was 291.3MB in the beginning and 269.3MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 17:31:48,180 INFO L158 Benchmark]: TraceAbstraction took 23545.95ms. Allocated memory was 373.3MB in the beginning and 9.6GB in the end (delta: 9.2GB). Free memory was 268.2MB in the beginning and 8.5GB in the end (delta: -8.2GB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. [2023-08-26 17:31:48,181 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 373.3MB. Free memory was 351.0MB in the beginning and 350.8MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 638.64ms. Allocated memory is still 373.3MB. Free memory was 329.0MB in the beginning and 295.3MB in the end (delta: 33.7MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 64.96ms. Allocated memory is still 373.3MB. Free memory was 295.3MB in the beginning and 293.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 46.33ms. Allocated memory is still 373.3MB. Free memory was 293.4MB in the beginning and 291.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 433.91ms. Allocated memory is still 373.3MB. Free memory was 291.3MB in the beginning and 269.3MB in the end (delta: 22.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 23545.95ms. Allocated memory was 373.3MB in the beginning and 9.6GB in the end (delta: 9.2GB). Free memory was 268.2MB in the beginning and 8.5GB in the end (delta: -8.2GB). Peak memory consumption was 1.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 283]: Unsoundness Warning unspecified type, defaulting to int C: short [283] - GenericResultAtLocation [Line: 283]: Unsoundness Warning unspecified type, defaulting to int C: short [283] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 172 PlacesBefore, 100 PlacesAfterwards, 159 TransitionsBefore, 86 TransitionsAfterwards, 2920 CoEnabledTransitionPairs, 5 FixpointIterations, 39 TrivialSequentialCompositions, 83 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 129 TotalNumberOfCompositions, 6797 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4695, independent: 4451, independent conditional: 0, independent unconditional: 4451, dependent: 244, dependent conditional: 0, dependent unconditional: 244, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1289, independent: 1225, independent conditional: 0, independent unconditional: 1225, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4695, independent: 3226, independent conditional: 0, independent unconditional: 3226, dependent: 180, dependent conditional: 0, dependent unconditional: 180, unknown: 1289, unknown conditional: 0, unknown unconditional: 1289] , Statistics on independence cache: Total cache size (in pairs): 182, Positive cache size: 155, Positive conditional cache size: 0, Positive unconditional cache size: 155, Negative cache size: 27, Negative conditional cache size: 0, Negative unconditional cache size: 27, 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: -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: -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: 20]: 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 11 procedures, 287 locations, 72 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: 23.4s, OverallIterations: 21, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 14.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1420 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1420 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 97 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2149 IncrementalHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 97 mSolverCounterUnsat, 41 mSDtfsCounter, 2149 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=318occurred in iteration=17, InterpolantAutomatonStates: 113, 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 463 NumberOfCodeBlocks, 463 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 442 ConstructedInterpolants, 0 QuantifiedInterpolants, 6320 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 21 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 33 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 17:31:48,197 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...