/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 INSUFFICIENT_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-deagle/circular_buffer_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:15:32,180 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:15:32,242 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 17:15:32,248 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:15:32,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:15:32,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:15:32,273 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:15:32,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:15:32,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:15:32,277 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:15:32,277 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:15:32,277 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:15:32,277 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:15:32,278 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:15:32,278 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:15:32,278 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:15:32,278 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:15:32,278 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:15:32,278 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:15:32,279 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:15:32,279 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:15:32,279 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:15:32,279 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:15:32,280 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:15:32,280 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:15:32,280 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:15:32,280 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:15:32,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:15:32,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:15:32,281 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:15:32,281 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:15:32,281 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:15:32,281 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:15:32,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:15:32,282 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:15:32,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:15:32,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:15:32,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:15:32,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:15:32,523 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:15:32,524 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:15:32,524 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-26 17:15:33,456 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:15:33,677 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:15:33,678 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_bad.i [2023-08-26 17:15:33,687 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07053e819/6928cb6cf31c446bbd7dd846ea09a162/FLAGecd6520ec [2023-08-26 17:15:33,697 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07053e819/6928cb6cf31c446bbd7dd846ea09a162 [2023-08-26 17:15:33,698 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:15:33,699 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:15:33,700 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:15:33,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:15:33,701 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:15:33,702 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:15:33" (1/1) ... [2023-08-26 17:15:33,702 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74f45d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:33, skipping insertion in model container [2023-08-26 17:15:33,702 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:15:33" (1/1) ... [2023-08-26 17:15:33,726 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:15:33,929 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:15:33,942 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:15:33,966 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [208] [2023-08-26 17:15:33,967 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [209] [2023-08-26 17:15:33,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:15:34,025 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:15:34,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34 WrapperNode [2023-08-26 17:15:34,025 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:15:34,026 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:15:34,026 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:15:34,026 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:15:34,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,059 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,076 INFO L138 Inliner]: procedures = 168, calls = 38, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 141 [2023-08-26 17:15:34,078 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:15:34,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:15:34,079 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:15:34,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:15:34,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,105 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,126 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:15:34,126 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:15:34,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:15:34,127 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:15:34,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (1/1) ... [2023-08-26 17:15:34,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:15:34,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:15:34,154 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 17:15:34,172 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 17:15:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 17:15:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 17:15:34,185 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 17:15:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 17:15:34,185 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 17:15:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:15:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 17:15:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:15:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:15:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:15:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-08-26 17:15:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:15:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:15:34,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:15:34,187 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 17:15:34,271 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:15:34,272 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:15:34,470 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:15:34,476 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:15:34,476 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 17:15:34,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:15:34 BoogieIcfgContainer [2023-08-26 17:15:34,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:15:34,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:15:34,479 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:15:34,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:15:34,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:15:33" (1/3) ... [2023-08-26 17:15:34,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b740b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:15:34, skipping insertion in model container [2023-08-26 17:15:34,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:15:34" (2/3) ... [2023-08-26 17:15:34,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b740b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:15:34, skipping insertion in model container [2023-08-26 17:15:34,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:15:34" (3/3) ... [2023-08-26 17:15:34,482 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_bad.i [2023-08-26 17:15:34,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:15:34,493 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 17:15:34,493 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:15:34,562 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 17:15:34,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 160 transitions, 336 flow [2023-08-26 17:15:34,619 INFO L124 PetriNetUnfolderBase]: 12/158 cut-off events. [2023-08-26 17:15:34,620 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:15:34,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 158 events. 12/158 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 335 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-26 17:15:34,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 160 transitions, 336 flow [2023-08-26 17:15:34,629 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 149 transitions, 307 flow [2023-08-26 17:15:34,631 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:15:34,636 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 149 transitions, 307 flow [2023-08-26 17:15:34,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 149 transitions, 307 flow [2023-08-26 17:15:34,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 149 transitions, 307 flow [2023-08-26 17:15:34,665 INFO L124 PetriNetUnfolderBase]: 12/149 cut-off events. [2023-08-26 17:15:34,665 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 17:15:34,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 149 events. 12/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 316 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 101. Up to 2 conditions per place. [2023-08-26 17:15:34,668 INFO L119 LiptonReduction]: Number of co-enabled transitions 5668 [2023-08-26 17:15:39,744 INFO L134 LiptonReduction]: Checked pairs total: 14419 [2023-08-26 17:15:39,744 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-26 17:15:39,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:15:39,758 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;@2435cc0c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:15:39,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-26 17:15:39,759 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:15:39,759 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 17:15:39,759 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:15:39,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:39,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:15:39,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:39,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:39,762 INFO L85 PathProgramCache]: Analyzing trace with hash 647, now seen corresponding path program 1 times [2023-08-26 17:15:39,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:39,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98242555] [2023-08-26 17:15:39,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:39,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:39,831 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 17:15:39,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:39,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98242555] [2023-08-26 17:15:39,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98242555] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:39,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:39,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:15:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084753294] [2023-08-26 17:15:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:39,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:15:39,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:39,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:15:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:15:39,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 315 [2023-08-26 17:15:39,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 48 transitions, 105 flow. Second operand has 2 states, 2 states have (on average 148.5) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:39,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:39,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 315 [2023-08-26 17:15:39,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:40,040 INFO L124 PetriNetUnfolderBase]: 1377/2158 cut-off events. [2023-08-26 17:15:40,040 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2023-08-26 17:15:40,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4228 conditions, 2158 events. 1377/2158 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 10602 event pairs, 1085 based on Foata normal form. 0/1131 useless extension candidates. Maximal degree in co-relation 4002. Up to 2027 conditions per place. [2023-08-26 17:15:40,053 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 40 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2023-08-26 17:15:40,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2023-08-26 17:15:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:15:40,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:15:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 339 transitions. [2023-08-26 17:15:40,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2023-08-26 17:15:40,068 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 339 transitions. [2023-08-26 17:15:40,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 339 transitions. [2023-08-26 17:15:40,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:40,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 339 transitions. [2023-08-26 17:15:40,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 169.5) internal successors, (339), 2 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,079 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,080 INFO L175 Difference]: Start difference. First operand has 48 places, 48 transitions, 105 flow. Second operand 2 states and 339 transitions. [2023-08-26 17:15:40,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2023-08-26 17:15:40,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:15:40,084 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2023-08-26 17:15:40,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-26 17:15:40,088 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-26 17:15:40,088 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2023-08-26 17:15:40,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 148.5) internal successors, (297), 2 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:40,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:15:40,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:15:40,089 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:40,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:40,090 INFO L85 PathProgramCache]: Analyzing trace with hash 637603, now seen corresponding path program 1 times [2023-08-26 17:15:40,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:40,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845947081] [2023-08-26 17:15:40,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:40,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:40,238 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 17:15:40,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:40,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845947081] [2023-08-26 17:15:40,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845947081] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:40,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:40,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:15:40,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671124405] [2023-08-26 17:15:40,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:40,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:40,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:40,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 315 [2023-08-26 17:15:40,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:40,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 315 [2023-08-26 17:15:40,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:40,380 INFO L124 PetriNetUnfolderBase]: 1348/2103 cut-off events. [2023-08-26 17:15:40,380 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 17:15:40,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 2103 events. 1348/2103 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 10317 event pairs, 1062 based on Foata normal form. 0/1113 useless extension candidates. Maximal degree in co-relation 4104. Up to 1974 conditions per place. [2023-08-26 17:15:40,390 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 37 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-26 17:15:40,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 164 flow [2023-08-26 17:15:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:40,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-26 17:15:40,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328042328042328 [2023-08-26 17:15:40,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-26 17:15:40,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-26 17:15:40,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:40,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-26 17:15:40,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,398 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,398 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 409 transitions. [2023-08-26 17:15:40,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 164 flow [2023-08-26 17:15:40,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:15:40,399 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 90 flow [2023-08-26 17:15:40,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-26 17:15:40,400 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-26 17:15:40,402 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 90 flow [2023-08-26 17:15:40,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:40,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:15:40,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:15:40,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:40,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:40,406 INFO L85 PathProgramCache]: Analyzing trace with hash 637605, now seen corresponding path program 1 times [2023-08-26 17:15:40,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:40,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655875181] [2023-08-26 17:15:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:40,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:40,511 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 17:15:40,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:40,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655875181] [2023-08-26 17:15:40,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655875181] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:40,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:40,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:15:40,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142774620] [2023-08-26 17:15:40,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:40,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:40,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:40,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:40,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 315 [2023-08-26 17:15:40,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:40,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 315 [2023-08-26 17:15:40,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:40,635 INFO L124 PetriNetUnfolderBase]: 1319/2048 cut-off events. [2023-08-26 17:15:40,635 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 17:15:40,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 2048 events. 1319/2048 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 9923 event pairs, 1039 based on Foata normal form. 0/1095 useless extension candidates. Maximal degree in co-relation 3998. Up to 1922 conditions per place. [2023-08-26 17:15:40,644 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 35 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 17:15:40,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 158 flow [2023-08-26 17:15:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:40,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:40,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 413 transitions. [2023-08-26 17:15:40,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2023-08-26 17:15:40,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 413 transitions. [2023-08-26 17:15:40,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 413 transitions. [2023-08-26 17:15:40,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:40,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 413 transitions. [2023-08-26 17:15:40,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,648 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 90 flow. Second operand 3 states and 413 transitions. [2023-08-26 17:15:40,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 158 flow [2023-08-26 17:15:40,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:15:40,650 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 87 flow [2023-08-26 17:15:40,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-08-26 17:15:40,651 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-08-26 17:15:40,651 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 87 flow [2023-08-26 17:15:40,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:40,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:15:40,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:15:40,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:40,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:40,652 INFO L85 PathProgramCache]: Analyzing trace with hash 612752220, now seen corresponding path program 1 times [2023-08-26 17:15:40,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:40,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298710048] [2023-08-26 17:15:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:40,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:40,779 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 17:15:40,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:40,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298710048] [2023-08-26 17:15:40,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298710048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:40,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:40,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:15:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346357577] [2023-08-26 17:15:40,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:40,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:40,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:40,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:40,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:40,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 315 [2023-08-26 17:15:40,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:40,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 315 [2023-08-26 17:15:40,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:40,872 INFO L124 PetriNetUnfolderBase]: 965/1525 cut-off events. [2023-08-26 17:15:40,873 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 17:15:40,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2987 conditions, 1525 events. 965/1525 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 7157 event pairs, 752 based on Foata normal form. 0/882 useless extension candidates. Maximal degree in co-relation 2983. Up to 1429 conditions per place. [2023-08-26 17:15:40,879 INFO L140 encePairwiseOnDemand]: 313/315 looper letters, 34 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 17:15:40,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 39 transitions, 155 flow [2023-08-26 17:15:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:40,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-26 17:15:40,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43492063492063493 [2023-08-26 17:15:40,880 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-26 17:15:40,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-26 17:15:40,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:40,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-26 17:15:40,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,883 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 87 flow. Second operand 3 states and 411 transitions. [2023-08-26 17:15:40,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 39 transitions, 155 flow [2023-08-26 17:15:40,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 39 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:15:40,884 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 86 flow [2023-08-26 17:15:40,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2023-08-26 17:15:40,885 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-08-26 17:15:40,885 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 86 flow [2023-08-26 17:15:40,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:40,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:15:40,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:15:40,885 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:40,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:40,886 INFO L85 PathProgramCache]: Analyzing trace with hash 612752218, now seen corresponding path program 1 times [2023-08-26 17:15:40,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:40,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019053868] [2023-08-26 17:15:40,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:40,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:40,929 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 17:15:40,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:40,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019053868] [2023-08-26 17:15:40,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019053868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:40,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:40,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:15:40,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309469236] [2023-08-26 17:15:40,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:40,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:15:40,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:15:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:15:40,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 315 [2023-08-26 17:15:40,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:40,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:40,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 315 [2023-08-26 17:15:40,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:41,002 INFO L124 PetriNetUnfolderBase]: 611/1002 cut-off events. [2023-08-26 17:15:41,003 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 17:15:41,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 1002 events. 611/1002 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 4498 event pairs, 465 based on Foata normal form. 0/669 useless extension candidates. Maximal degree in co-relation 1968. Up to 936 conditions per place. [2023-08-26 17:15:41,007 INFO L140 encePairwiseOnDemand]: 313/315 looper letters, 33 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 17:15:41,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 152 flow [2023-08-26 17:15:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:41,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-26 17:15:41,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2023-08-26 17:15:41,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-26 17:15:41,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-26 17:15:41,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:41,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-26 17:15:41,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,024 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 86 flow. Second operand 3 states and 395 transitions. [2023-08-26 17:15:41,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 152 flow [2023-08-26 17:15:41,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 38 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:15:41,025 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 85 flow [2023-08-26 17:15:41,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-08-26 17:15:41,025 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2023-08-26 17:15:41,026 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 85 flow [2023-08-26 17:15:41,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:41,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:15:41,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:15:41,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:41,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash 612734079, now seen corresponding path program 1 times [2023-08-26 17:15:41,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:41,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049419342] [2023-08-26 17:15:41,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:41,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:41,081 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 17:15:41,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:41,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049419342] [2023-08-26 17:15:41,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049419342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:41,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:41,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:15:41,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964400261] [2023-08-26 17:15:41,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:41,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:41,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:41,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:41,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 315 [2023-08-26 17:15:41,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:41,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 315 [2023-08-26 17:15:41,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:41,149 INFO L124 PetriNetUnfolderBase]: 529/866 cut-off events. [2023-08-26 17:15:41,149 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 17:15:41,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1703 conditions, 866 events. 529/866 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3714 event pairs, 393 based on Foata normal form. 0/607 useless extension candidates. Maximal degree in co-relation 1699. Up to 804 conditions per place. [2023-08-26 17:15:41,152 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 31 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 17:15:41,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 145 flow [2023-08-26 17:15:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-26 17:15:41,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264550264550265 [2023-08-26 17:15:41,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-26 17:15:41,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-26 17:15:41,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:41,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-26 17:15:41,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,156 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,156 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 85 flow. Second operand 3 states and 403 transitions. [2023-08-26 17:15:41,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 145 flow [2023-08-26 17:15:41,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 144 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:15:41,157 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 82 flow [2023-08-26 17:15:41,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 17:15:41,157 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2023-08-26 17:15:41,157 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 82 flow [2023-08-26 17:15:41,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:41,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:15:41,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:15:41,158 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:41,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:41,158 INFO L85 PathProgramCache]: Analyzing trace with hash 612734077, now seen corresponding path program 1 times [2023-08-26 17:15:41,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:41,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757861337] [2023-08-26 17:15:41,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:41,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:41,260 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 17:15:41,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:41,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757861337] [2023-08-26 17:15:41,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757861337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:41,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:41,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:15:41,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722715261] [2023-08-26 17:15:41,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:41,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:41,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:41,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:41,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:41,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 315 [2023-08-26 17:15:41,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:41,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 315 [2023-08-26 17:15:41,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:41,373 INFO L124 PetriNetUnfolderBase]: 796/1329 cut-off events. [2023-08-26 17:15:41,373 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-26 17:15:41,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2608 conditions, 1329 events. 796/1329 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 5749 event pairs, 276 based on Foata normal form. 0/948 useless extension candidates. Maximal degree in co-relation 2604. Up to 753 conditions per place. [2023-08-26 17:15:41,378 INFO L140 encePairwiseOnDemand]: 309/315 looper letters, 53 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-26 17:15:41,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 60 transitions, 245 flow [2023-08-26 17:15:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-26 17:15:41,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4306878306878307 [2023-08-26 17:15:41,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-26 17:15:41,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-26 17:15:41,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:41,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-26 17:15:41,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,382 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 82 flow. Second operand 3 states and 407 transitions. [2023-08-26 17:15:41,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 60 transitions, 245 flow [2023-08-26 17:15:41,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:15:41,383 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 104 flow [2023-08-26 17:15:41,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-26 17:15:41,383 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-26 17:15:41,384 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 104 flow [2023-08-26 17:15:41,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:41,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:41,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:15:41,384 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:41,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash 426927818, now seen corresponding path program 1 times [2023-08-26 17:15:41,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:41,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474716828] [2023-08-26 17:15:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:41,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:41,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-26 17:15:41,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172015362] [2023-08-26 17:15:41,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:41,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:41,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:15:41,397 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:15:41,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 17:15:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:41,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 17:15:41,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:15:41,502 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 17:15:41,502 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:15:41,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474716828] [2023-08-26 17:15:41,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-26 17:15:41,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172015362] [2023-08-26 17:15:41,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172015362] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:41,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:41,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:15:41,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625565016] [2023-08-26 17:15:41,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:41,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:41,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:41,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:41,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:41,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 315 [2023-08-26 17:15:41,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:41,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 315 [2023-08-26 17:15:41,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:41,595 INFO L124 PetriNetUnfolderBase]: 759/1268 cut-off events. [2023-08-26 17:15:41,595 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-26 17:15:41,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2600 conditions, 1268 events. 759/1268 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5542 event pairs, 557 based on Foata normal form. 0/981 useless extension candidates. Maximal degree in co-relation 2595. Up to 1156 conditions per place. [2023-08-26 17:15:41,600 INFO L140 encePairwiseOnDemand]: 313/315 looper letters, 31 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 17:15:41,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 159 flow [2023-08-26 17:15:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:41,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:41,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-08-26 17:15:41,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45925925925925926 [2023-08-26 17:15:41,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-08-26 17:15:41,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-08-26 17:15:41,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:41,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-08-26 17:15:41,626 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 17:15:41,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,628 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,628 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 104 flow. Second operand 3 states and 434 transitions. [2023-08-26 17:15:41,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 159 flow [2023-08-26 17:15:41,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 36 transitions, 157 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:15:41,629 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 95 flow [2023-08-26 17:15:41,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=95, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-26 17:15:41,630 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2023-08-26 17:15:41,630 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 95 flow [2023-08-26 17:15:41,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:41,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:41,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 17:15:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:41,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:41,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1860296884, now seen corresponding path program 1 times [2023-08-26 17:15:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:41,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560557275] [2023-08-26 17:15:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:41,886 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 17:15:41,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:41,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560557275] [2023-08-26 17:15:41,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560557275] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:41,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:41,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:15:41,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688073564] [2023-08-26 17:15:41,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:41,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:41,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:41,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:41,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:41,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 315 [2023-08-26 17:15:41,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:41,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:41,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 315 [2023-08-26 17:15:41,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:42,040 INFO L124 PetriNetUnfolderBase]: 1117/1878 cut-off events. [2023-08-26 17:15:42,040 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-26 17:15:42,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3903 conditions, 1878 events. 1117/1878 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8605 event pairs, 419 based on Foata normal form. 0/1480 useless extension candidates. Maximal degree in co-relation 3898. Up to 1161 conditions per place. [2023-08-26 17:15:42,048 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 53 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-26 17:15:42,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 59 transitions, 262 flow [2023-08-26 17:15:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-26 17:15:42,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508994708994709 [2023-08-26 17:15:42,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-26 17:15:42,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-26 17:15:42,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:42,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-26 17:15:42,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,052 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 95 flow. Second operand 3 states and 481 transitions. [2023-08-26 17:15:42,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 59 transitions, 262 flow [2023-08-26 17:15:42,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:15:42,053 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 109 flow [2023-08-26 17:15:42,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-26 17:15:42,053 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2023-08-26 17:15:42,054 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 109 flow [2023-08-26 17:15:42,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:42,054 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:42,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 17:15:42,054 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:42,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:42,054 INFO L85 PathProgramCache]: Analyzing trace with hash -780043826, now seen corresponding path program 1 times [2023-08-26 17:15:42,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:42,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042259650] [2023-08-26 17:15:42,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:42,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:42,064 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-26 17:15:42,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975318866] [2023-08-26 17:15:42,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:42,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:42,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:15:42,065 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:15:42,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 17:15:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:42,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 17:15:42,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:15:42,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:15:42,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:15:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:15:42,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:42,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042259650] [2023-08-26 17:15:42,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-26 17:15:42,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975318866] [2023-08-26 17:15:42,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975318866] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 17:15:42,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 17:15:42,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-08-26 17:15:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608402710] [2023-08-26 17:15:42,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:42,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:42,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:15:42,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 315 [2023-08-26 17:15:42,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:42,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 315 [2023-08-26 17:15:42,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:42,299 INFO L124 PetriNetUnfolderBase]: 763/1352 cut-off events. [2023-08-26 17:15:42,299 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-26 17:15:42,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1352 events. 763/1352 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6150 event pairs, 275 based on Foata normal form. 32/1165 useless extension candidates. Maximal degree in co-relation 2801. Up to 806 conditions per place. [2023-08-26 17:15:42,304 INFO L140 encePairwiseOnDemand]: 308/315 looper letters, 39 selfloop transitions, 3 changer transitions 5/50 dead transitions. [2023-08-26 17:15:42,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 50 transitions, 230 flow [2023-08-26 17:15:42,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:42,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:42,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 475 transitions. [2023-08-26 17:15:42,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2023-08-26 17:15:42,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 475 transitions. [2023-08-26 17:15:42,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 475 transitions. [2023-08-26 17:15:42,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:42,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 475 transitions. [2023-08-26 17:15:42,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.33333333333334) internal successors, (475), 3 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,308 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,308 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 109 flow. Second operand 3 states and 475 transitions. [2023-08-26 17:15:42,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 50 transitions, 230 flow [2023-08-26 17:15:42,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 224 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:15:42,310 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 119 flow [2023-08-26 17:15:42,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-26 17:15:42,311 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-08-26 17:15:42,312 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 119 flow [2023-08-26 17:15:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:42,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:42,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 17:15:42,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 17:15:42,517 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:42,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:42,517 INFO L85 PathProgramCache]: Analyzing trace with hash 235347345, now seen corresponding path program 1 times [2023-08-26 17:15:42,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:42,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105568261] [2023-08-26 17:15:42,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:42,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:42,560 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 17:15:42,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:42,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105568261] [2023-08-26 17:15:42,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105568261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:42,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:42,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:15:42,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248213457] [2023-08-26 17:15:42,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:42,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:42,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:42,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:42,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:42,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 315 [2023-08-26 17:15:42,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:42,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 315 [2023-08-26 17:15:42,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:42,651 INFO L124 PetriNetUnfolderBase]: 532/965 cut-off events. [2023-08-26 17:15:42,652 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-26 17:15:42,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2161 conditions, 965 events. 532/965 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 4223 event pairs, 147 based on Foata normal form. 0/871 useless extension candidates. Maximal degree in co-relation 2154. Up to 607 conditions per place. [2023-08-26 17:15:42,658 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 41 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2023-08-26 17:15:42,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 234 flow [2023-08-26 17:15:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-26 17:15:42,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4740740740740741 [2023-08-26 17:15:42,660 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-26 17:15:42,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-26 17:15:42,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:42,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-26 17:15:42,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,663 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 119 flow. Second operand 3 states and 448 transitions. [2023-08-26 17:15:42,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 234 flow [2023-08-26 17:15:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 228 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:15:42,666 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 121 flow [2023-08-26 17:15:42,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-26 17:15:42,666 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2023-08-26 17:15:42,666 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 121 flow [2023-08-26 17:15:42,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:42,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:42,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 17:15:42,667 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:42,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:42,667 INFO L85 PathProgramCache]: Analyzing trace with hash -122543660, now seen corresponding path program 1 times [2023-08-26 17:15:42,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:42,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151925204] [2023-08-26 17:15:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:42,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:42,775 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 17:15:42,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:42,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151925204] [2023-08-26 17:15:42,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151925204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:42,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:42,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:15:42,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856210409] [2023-08-26 17:15:42,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:42,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:15:42,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:42,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:15:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:15:42,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 315 [2023-08-26 17:15:42,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:42,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 315 [2023-08-26 17:15:42,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:42,851 INFO L124 PetriNetUnfolderBase]: 330/625 cut-off events. [2023-08-26 17:15:42,851 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-26 17:15:42,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1437 conditions, 625 events. 330/625 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2299 event pairs, 158 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 1430. Up to 416 conditions per place. [2023-08-26 17:15:42,855 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 40 selfloop transitions, 2 changer transitions 4/50 dead transitions. [2023-08-26 17:15:42,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 250 flow [2023-08-26 17:15:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:15:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:15:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-26 17:15:42,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47513227513227513 [2023-08-26 17:15:42,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-26 17:15:42,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-26 17:15:42,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:42,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-26 17:15:42,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,860 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,860 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 121 flow. Second operand 3 states and 449 transitions. [2023-08-26 17:15:42,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 250 flow [2023-08-26 17:15:42,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 240 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 17:15:42,862 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 121 flow [2023-08-26 17:15:42,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2023-08-26 17:15:42,863 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2023-08-26 17:15:42,863 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 121 flow [2023-08-26 17:15:42,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:42,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:42,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:42,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 17:15:42,864 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:42,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:42,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1314295106, now seen corresponding path program 1 times [2023-08-26 17:15:42,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:42,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390862934] [2023-08-26 17:15:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:42,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:42,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-26 17:15:42,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920873815] [2023-08-26 17:15:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:42,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:42,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:15:42,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:15:42,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 17:15:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:42,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 17:15:42,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:15:43,080 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 17:15:43,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:15:43,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:43,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390862934] [2023-08-26 17:15:43,080 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-26 17:15:43,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920873815] [2023-08-26 17:15:43,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920873815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:43,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:43,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:15:43,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786109989] [2023-08-26 17:15:43,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:43,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:15:43,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:43,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:15:43,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:15:43,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 315 [2023-08-26 17:15:43,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:43,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 315 [2023-08-26 17:15:43,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:43,204 INFO L124 PetriNetUnfolderBase]: 521/982 cut-off events. [2023-08-26 17:15:43,204 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-26 17:15:43,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2176 conditions, 982 events. 521/982 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3909 event pairs, 214 based on Foata normal form. 0/956 useless extension candidates. Maximal degree in co-relation 2167. Up to 373 conditions per place. [2023-08-26 17:15:43,208 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 62 selfloop transitions, 3 changer transitions 4/73 dead transitions. [2023-08-26 17:15:43,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 73 transitions, 364 flow [2023-08-26 17:15:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:15:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:15:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 522 transitions. [2023-08-26 17:15:43,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2023-08-26 17:15:43,210 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 522 transitions. [2023-08-26 17:15:43,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 522 transitions. [2023-08-26 17:15:43,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:43,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 522 transitions. [2023-08-26 17:15:43,212 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,213 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,213 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 121 flow. Second operand 4 states and 522 transitions. [2023-08-26 17:15:43,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 73 transitions, 364 flow [2023-08-26 17:15:43,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 73 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:15:43,215 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 131 flow [2023-08-26 17:15:43,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-08-26 17:15:43,216 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2023-08-26 17:15:43,216 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 131 flow [2023-08-26 17:15:43,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:43,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:43,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 17:15:43,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:43,422 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:43,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:43,422 INFO L85 PathProgramCache]: Analyzing trace with hash -2088442694, now seen corresponding path program 1 times [2023-08-26 17:15:43,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:43,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535738167] [2023-08-26 17:15:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:43,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:43,436 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-26 17:15:43,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397617472] [2023-08-26 17:15:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:43,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:43,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:15:43,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:15:43,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 17:15:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:43,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 17:15:43,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:15:43,750 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 17:15:43,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:15:43,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:43,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535738167] [2023-08-26 17:15:43,750 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-26 17:15:43,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397617472] [2023-08-26 17:15:43,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397617472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:43,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:43,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:15:43,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642242574] [2023-08-26 17:15:43,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:43,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:15:43,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:43,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:15:43,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:15:43,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 315 [2023-08-26 17:15:43,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:43,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 315 [2023-08-26 17:15:43,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:43,852 INFO L124 PetriNetUnfolderBase]: 412/779 cut-off events. [2023-08-26 17:15:43,852 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2023-08-26 17:15:43,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1761 conditions, 779 events. 412/779 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2817 event pairs, 158 based on Foata normal form. 8/778 useless extension candidates. Maximal degree in co-relation 1751. Up to 364 conditions per place. [2023-08-26 17:15:43,854 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 52 selfloop transitions, 3 changer transitions 5/64 dead transitions. [2023-08-26 17:15:43,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 321 flow [2023-08-26 17:15:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:15:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:15:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 577 transitions. [2023-08-26 17:15:43,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4579365079365079 [2023-08-26 17:15:43,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 577 transitions. [2023-08-26 17:15:43,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 577 transitions. [2023-08-26 17:15:43,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:43,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 577 transitions. [2023-08-26 17:15:43,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.25) internal successors, (577), 4 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,860 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,860 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 131 flow. Second operand 4 states and 577 transitions. [2023-08-26 17:15:43,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 321 flow [2023-08-26 17:15:43,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 317 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:15:43,863 INFO L231 Difference]: Finished difference. Result has 53 places, 37 transitions, 137 flow [2023-08-26 17:15:43,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=53, PETRI_TRANSITIONS=37} [2023-08-26 17:15:43,863 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 5 predicate places. [2023-08-26 17:15:43,864 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 37 transitions, 137 flow [2023-08-26 17:15:43,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:43,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:43,864 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 17:15:43,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 17:15:44,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:44,070 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:44,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:44,070 INFO L85 PathProgramCache]: Analyzing trace with hash -317229367, now seen corresponding path program 1 times [2023-08-26 17:15:44,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:44,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196648745] [2023-08-26 17:15:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:44,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-26 17:15:44,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1806470552] [2023-08-26 17:15:44,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:44,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:44,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:15:44,081 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:15:44,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 17:15:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:15:44,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-26 17:15:44,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:15:44,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:15:44,354 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-26 17:15:44,366 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-26 17:15:44,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-26 17:15:44,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 17:15:44,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-26 17:15:44,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2023-08-26 17:15:44,682 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 17:15:44,682 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:15:44,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:44,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196648745] [2023-08-26 17:15:44,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-26 17:15:44,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806470552] [2023-08-26 17:15:44,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806470552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:44,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:44,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 17:15:44,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376533458] [2023-08-26 17:15:44,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:44,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 17:15:44,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 17:15:44,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 17:15:44,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 315 [2023-08-26 17:15:44,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 37 transitions, 137 flow. Second operand has 9 states, 9 states have (on average 97.77777777777777) internal successors, (880), 9 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:44,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:44,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 315 [2023-08-26 17:15:44,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:45,161 INFO L124 PetriNetUnfolderBase]: 885/1642 cut-off events. [2023-08-26 17:15:45,161 INFO L125 PetriNetUnfolderBase]: For 381/389 co-relation queries the response was YES. [2023-08-26 17:15:45,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3734 conditions, 1642 events. 885/1642 cut-off events. For 381/389 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 7779 event pairs, 311 based on Foata normal form. 59/1680 useless extension candidates. Maximal degree in co-relation 3723. Up to 578 conditions per place. [2023-08-26 17:15:45,166 INFO L140 encePairwiseOnDemand]: 301/315 looper letters, 108 selfloop transitions, 24 changer transitions 3/139 dead transitions. [2023-08-26 17:15:45,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 139 transitions, 722 flow [2023-08-26 17:15:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 17:15:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 17:15:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1100 transitions. [2023-08-26 17:15:45,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3492063492063492 [2023-08-26 17:15:45,169 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1100 transitions. [2023-08-26 17:15:45,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1100 transitions. [2023-08-26 17:15:45,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:45,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1100 transitions. [2023-08-26 17:15:45,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 110.0) internal successors, (1100), 10 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:45,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:45,175 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 315.0) internal successors, (3465), 11 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:45,175 INFO L175 Difference]: Start difference. First operand has 53 places, 37 transitions, 137 flow. Second operand 10 states and 1100 transitions. [2023-08-26 17:15:45,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 139 transitions, 722 flow [2023-08-26 17:15:45,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 139 transitions, 704 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:15:45,178 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 329 flow [2023-08-26 17:15:45,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=329, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-08-26 17:15:45,178 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 18 predicate places. [2023-08-26 17:15:45,178 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 329 flow [2023-08-26 17:15:45,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 97.77777777777777) internal successors, (880), 9 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:45,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:45,179 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 17:15:45,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 17:15:45,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 17:15:45,384 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:45,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:45,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1461527893, now seen corresponding path program 2 times [2023-08-26 17:15:45,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:45,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560537128] [2023-08-26 17:15:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:45,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:45,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-26 17:15:45,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1213557337] [2023-08-26 17:15:45,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:15:45,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:45,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:15:45,396 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:15:45,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 17:15:45,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 17:15:45,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:15:45,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-26 17:15:45,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:15:45,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:15:45,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 12 [2023-08-26 17:15:45,619 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-26 17:15:45,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-26 17:15:45,632 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 17:15:45,688 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-08-26 17:15:45,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2023-08-26 17:15:45,853 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 17:15:45,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:15:45,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:15:45,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560537128] [2023-08-26 17:15:45,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-08-26 17:15:45,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213557337] [2023-08-26 17:15:45,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213557337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:15:45,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:15:45,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 17:15:45,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921031083] [2023-08-26 17:15:45,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:15:45,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 17:15:45,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:15:45,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 17:15:45,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 17:15:45,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 315 [2023-08-26 17:15:45,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 329 flow. Second operand has 9 states, 9 states have (on average 97.77777777777777) internal successors, (880), 9 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:45,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:15:45,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 315 [2023-08-26 17:15:45,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:15:46,373 INFO L124 PetriNetUnfolderBase]: 1449/2710 cut-off events. [2023-08-26 17:15:46,375 INFO L125 PetriNetUnfolderBase]: For 4113/4137 co-relation queries the response was YES. [2023-08-26 17:15:46,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8680 conditions, 2710 events. 1449/2710 cut-off events. For 4113/4137 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14435 event pairs, 296 based on Foata normal form. 45/2727 useless extension candidates. Maximal degree in co-relation 8662. Up to 742 conditions per place. [2023-08-26 17:15:46,386 INFO L140 encePairwiseOnDemand]: 302/315 looper letters, 130 selfloop transitions, 44 changer transitions 4/182 dead transitions. [2023-08-26 17:15:46,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 182 transitions, 1240 flow [2023-08-26 17:15:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 17:15:46,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 17:15:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1314 transitions. [2023-08-26 17:15:46,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3476190476190476 [2023-08-26 17:15:46,389 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1314 transitions. [2023-08-26 17:15:46,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1314 transitions. [2023-08-26 17:15:46,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:15:46,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1314 transitions. [2023-08-26 17:15:46,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.5) internal successors, (1314), 12 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:46,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 315.0) internal successors, (4095), 13 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:46,396 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 315.0) internal successors, (4095), 13 states have internal predecessors, (4095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:46,396 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 329 flow. Second operand 12 states and 1314 transitions. [2023-08-26 17:15:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 182 transitions, 1240 flow [2023-08-26 17:15:46,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 182 transitions, 1234 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-26 17:15:46,407 INFO L231 Difference]: Finished difference. Result has 84 places, 84 transitions, 662 flow [2023-08-26 17:15:46,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=662, PETRI_PLACES=84, PETRI_TRANSITIONS=84} [2023-08-26 17:15:46,408 INFO L281 CegarLoopForPetriNet]: 48 programPoint places, 36 predicate places. [2023-08-26 17:15:46,408 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 84 transitions, 662 flow [2023-08-26 17:15:46,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 97.77777777777777) internal successors, (880), 9 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:15:46,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:15:46,408 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:46,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 17:15:46,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 17:15:46,614 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:15:46,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:15:46,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1899533698, now seen corresponding path program 1 times [2023-08-26 17:15:46,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:15:46,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531426441] [2023-08-26 17:15:46,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:46,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:15:46,629 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-08-26 17:15:46,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710328394] [2023-08-26 17:15:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:15:46,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:46,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:15:46,630 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:15:46,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 17:15:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 17:15:46,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 17:15:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 17:15:46,855 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 17:15:46,855 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 17:15:46,856 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONASSERT (21 of 22 remaining) [2023-08-26 17:15:46,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-26 17:15:46,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-26 17:15:46,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-26 17:15:46,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-26 17:15:46,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-26 17:15:46,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-26 17:15:46,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-26 17:15:46,857 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONASSERT (8 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONASSERT (5 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONASSERT (2 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-26 17:15:46,858 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-26 17:15:46,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 17:15:47,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:15:47,059 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:15:47,063 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:15:47,063 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:15:47,097 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:15:47 BasicIcfg [2023-08-26 17:15:47,098 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:15:47,098 INFO L158 Benchmark]: Toolchain (without parser) took 13399.07ms. Allocated memory was 369.1MB in the beginning and 534.8MB in the end (delta: 165.7MB). Free memory was 344.0MB in the beginning and 392.2MB in the end (delta: -48.2MB). Peak memory consumption was 120.3MB. Max. memory is 16.0GB. [2023-08-26 17:15:47,098 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 369.1MB. Free memory is still 345.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:15:47,098 INFO L158 Benchmark]: CACSL2BoogieTranslator took 325.94ms. Allocated memory is still 369.1MB. Free memory was 344.0MB in the beginning and 323.2MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 17:15:47,098 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.81ms. Allocated memory is still 369.1MB. Free memory was 323.2MB in the beginning and 321.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:15:47,098 INFO L158 Benchmark]: Boogie Preprocessor took 47.54ms. Allocated memory is still 369.1MB. Free memory was 321.1MB in the beginning and 319.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:15:47,099 INFO L158 Benchmark]: RCFGBuilder took 351.08ms. Allocated memory is still 369.1MB. Free memory was 319.0MB in the beginning and 299.6MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 17:15:47,099 INFO L158 Benchmark]: TraceAbstraction took 12618.81ms. Allocated memory was 369.1MB in the beginning and 534.8MB in the end (delta: 165.7MB). Free memory was 299.1MB in the beginning and 392.2MB in the end (delta: -93.1MB). Peak memory consumption was 76.3MB. Max. memory is 16.0GB. [2023-08-26 17:15:47,100 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 369.1MB. Free memory is still 345.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 325.94ms. Allocated memory is still 369.1MB. Free memory was 344.0MB in the beginning and 323.2MB in the end (delta: 20.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.81ms. Allocated memory is still 369.1MB. Free memory was 323.2MB in the beginning and 321.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 47.54ms. Allocated memory is still 369.1MB. Free memory was 321.1MB in the beginning and 319.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 351.08ms. Allocated memory is still 369.1MB. Free memory was 319.0MB in the beginning and 299.6MB in the end (delta: 19.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 12618.81ms. Allocated memory was 369.1MB in the beginning and 534.8MB in the end (delta: 165.7MB). Free memory was 299.1MB in the beginning and 392.2MB in the end (delta: -93.1MB). Peak memory consumption was 76.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 208]: Unsoundness Warning unspecified type, defaulting to int C: short [208] - GenericResultAtLocation [Line: 209]: Unsoundness Warning unspecified type, defaulting to int C: short [209] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.1s, 144 PlacesBefore, 48 PlacesAfterwards, 149 TransitionsBefore, 48 TransitionsAfterwards, 5668 CoEnabledTransitionPairs, 7 FixpointIterations, 51 TrivialSequentialCompositions, 81 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 18 ConcurrentYvCompositions, 5 ChoiceCompositions, 155 TotalNumberOfCompositions, 14419 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7622, independent: 7265, independent conditional: 0, independent unconditional: 7265, dependent: 357, dependent conditional: 0, dependent unconditional: 357, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3161, independent: 3112, independent conditional: 0, independent unconditional: 3112, dependent: 49, dependent conditional: 0, dependent unconditional: 49, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7622, independent: 4153, independent conditional: 0, independent unconditional: 4153, dependent: 308, dependent conditional: 0, dependent unconditional: 308, unknown: 3161, unknown conditional: 0, unknown unconditional: 3161] , Statistics on independence cache: Total cache size (in pairs): 297, Positive cache size: 274, Positive conditional cache size: 0, Positive unconditional cache size: 274, Negative cache size: 23, Negative conditional cache size: 0, Negative unconditional cache size: 23, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 681]: assertion can be violated assertion can be violated We found a FailurePath: [L682] 0 static char buffer[10]; [L683] 0 static unsigned int first; [L684] 0 static unsigned int next; [L685] 0 static int buffer_size; [L686] 0 _Bool send, receive; [L687] 0 pthread_mutex_t m; [L756] 0 pthread_t id1, id2; [L758] CALL 0 initLog(10) [L690] 0 buffer_size = max [L691] EXPR 0 next = 0 [L691] 0 first = next = 0 [L758] RET 0 initLog(10) [L759] 0 send=1 [L760] 0 receive=0 [L761] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-1, receive=0, send=1] [L762] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [buffer={3:0}, buffer_size=10, first=0, id1={5:0}, id2={6:0}, m={4:0}, next=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=0, receive=0, send=1] [L739] 2 int i; [L740] 2 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] COND TRUE 2 i<7 [L743] COND FALSE 2 !(\read(receive)) VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L740] 2 i++ VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=1, m={4:0}, next=0, receive=0, send=1] [L723] 1 int i; [L724] 1 i=0 VAL [arg={0:0}, arg={0:0}, buffer={3:0}, buffer_size=10, first=0, i=0, m={4:0}, next=0, receive=0, send=1] [L724] COND TRUE 1 i<7 [L727] COND TRUE 1 \read(send) [L729] CALL 1 insertLogElement(i) [L707] COND TRUE 1 next < buffer_size && buffer_size > 0 [L709] 1 buffer[next] = b VAL [\old(b)=0, b=0, buffer={3:0}, buffer_size=10, first=0, m={4:0}, next=0, receive=0, send=1] [L710] 1 next = (next+1)%buffer_size [L712] COND TRUE 1 next 0 && first < buffer_size [L697] 2 first++ [L698] EXPR 2 buffer[first-1] [L698] 2 return buffer[first-1]; [L745] RET, EXPR 2 removeLogElement() [L745] COND FALSE 2 !(removeLogElement()==i) [L746] CALL 2 reach_error() [L681] COND FALSE 2 !(0) [L681] 2 __assert_fail ("0", "", 0, __extension__ __PRETTY_FUNCTION__) VAL [\read(__PRETTY_FUNCTION__)={121:120}, buffer={3:0}, buffer_size=10, first=1, m={4:0}, next=1, receive=1, send=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 762]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 761]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 681]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 227 locations, 22 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: 12.5s, OverallIterations: 17, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 685 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 685 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 37 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1536 IncrementalHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 37 mSolverCounterUnsat, 2 mSDtfsCounter, 1536 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=662occurred in iteration=16, InterpolantAutomatonStates: 65, 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, 0.8s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 150 ConstructedInterpolants, 18 QuantifiedInterpolants, 1377 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1320 ConjunctsInSsa, 102 ConjunctsInUnsatCore, 17 InterpolantComputations, 16 PerfectInterpolantSequences, 2/4 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-26 17:15:47,119 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...