/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:34:49,569 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:34:49,659 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 18:34:49,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:34:49,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:34:49,696 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:34:49,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:34:49,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:34:49,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:34:49,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:34:49,702 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:34:49,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:34:49,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:34:49,704 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:34:49,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:34:49,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:34:49,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:34:49,704 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:34:49,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:34:49,705 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:34:49,705 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:34:49,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:34:49,706 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:34:49,706 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:34:49,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:34:49,707 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:34:49,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:34:49,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:34:49,707 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:34:49,708 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:34:49,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:34:49,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:34:49,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:34:49,709 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:34:49,709 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:34:49,710 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:34:50,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:34:50,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:34:50,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:34:50,041 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:34:50,041 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:34:50,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i [2023-08-26 18:34:51,285 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:34:51,613 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:34:51,614 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i [2023-08-26 18:34:51,643 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc334b0b4/01e58b1b7a074b33895294b8a0851206/FLAG71396e8d5 [2023-08-26 18:34:51,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc334b0b4/01e58b1b7a074b33895294b8a0851206 [2023-08-26 18:34:51,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:34:51,664 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:34:51,670 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:34:51,670 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:34:51,673 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:34:51,674 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:34:51" (1/1) ... [2023-08-26 18:34:51,675 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a57a2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:51, skipping insertion in model container [2023-08-26 18:34:51,675 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:34:51" (1/1) ... [2023-08-26 18:34:51,725 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:34:52,128 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:34:52,151 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:34:52,177 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 18:34:52,178 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 18:34:52,196 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [741] [2023-08-26 18:34:52,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:34:52,280 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:34:52,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52 WrapperNode [2023-08-26 18:34:52,281 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:34:52,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:34:52,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:34:52,282 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:34:52,287 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,317 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,342 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-08-26 18:34:52,343 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:34:52,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:34:52,344 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:34:52,344 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:34:52,351 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,352 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,362 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,362 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,371 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,373 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,374 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,375 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,382 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:34:52,383 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:34:52,383 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:34:52,383 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:34:52,383 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (1/1) ... [2023-08-26 18:34:52,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:34:52,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:34:52,408 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 18:34:52,434 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 18:34:52,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:34:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:34:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:34:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:34:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:34:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:34:52,448 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 18:34:52,448 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 18:34:52,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:34:52,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:34:52,450 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 18:34:52,561 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:34:52,562 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:34:52,741 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:34:52,746 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:34:52,746 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 18:34:52,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:34:52 BoogieIcfgContainer [2023-08-26 18:34:52,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:34:52,750 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:34:52,750 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:34:52,753 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:34:52,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:34:51" (1/3) ... [2023-08-26 18:34:52,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b4cbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:34:52, skipping insertion in model container [2023-08-26 18:34:52,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:34:52" (2/3) ... [2023-08-26 18:34:52,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14b4cbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:34:52, skipping insertion in model container [2023-08-26 18:34:52,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:34:52" (3/3) ... [2023-08-26 18:34:52,755 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_06-tricky_address1.i [2023-08-26 18:34:52,770 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:34:52,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 18:34:52,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:34:52,836 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 18:34:52,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 81 transitions, 167 flow [2023-08-26 18:34:52,919 INFO L124 PetriNetUnfolderBase]: 4/80 cut-off events. [2023-08-26 18:34:52,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:34:52,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-08-26 18:34:52,925 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 81 transitions, 167 flow [2023-08-26 18:34:52,930 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 80 transitions, 163 flow [2023-08-26 18:34:52,935 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:34:52,947 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 80 transitions, 163 flow [2023-08-26 18:34:52,954 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 80 transitions, 163 flow [2023-08-26 18:34:52,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 80 transitions, 163 flow [2023-08-26 18:34:52,992 INFO L124 PetriNetUnfolderBase]: 4/80 cut-off events. [2023-08-26 18:34:52,992 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:34:52,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-08-26 18:34:52,994 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-08-26 18:34:54,985 INFO L134 LiptonReduction]: Checked pairs total: 1784 [2023-08-26 18:34:54,985 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-26 18:34:54,997 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:34:55,002 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;@7c10cfb3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:34:55,003 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-26 18:34:55,004 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:34:55,004 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-26 18:34:55,004 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:34:55,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:55,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:34:55,005 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:55,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:55,009 INFO L85 PathProgramCache]: Analyzing trace with hash 9959, now seen corresponding path program 1 times [2023-08-26 18:34:55,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:55,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558545915] [2023-08-26 18:34:55,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:55,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:55,127 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 18:34:55,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:55,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558545915] [2023-08-26 18:34:55,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558545915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:55,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:34:55,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:34:55,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448301640] [2023-08-26 18:34:55,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:55,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:34:55,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:55,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:34:55,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:34:55,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 163 [2023-08-26 18:34:55,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 49 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:55,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 163 [2023-08-26 18:34:55,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:55,196 INFO L124 PetriNetUnfolderBase]: 36/88 cut-off events. [2023-08-26 18:34:55,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:34:55,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 88 events. 36/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 316 event pairs, 35 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 166. Up to 87 conditions per place. [2023-08-26 18:34:55,198 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 16 selfloop transitions, 0 changer transitions 0/18 dead transitions. [2023-08-26 18:34:55,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 71 flow [2023-08-26 18:34:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:34:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:34:55,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 175 transitions. [2023-08-26 18:34:55,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368098159509203 [2023-08-26 18:34:55,209 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 175 transitions. [2023-08-26 18:34:55,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 175 transitions. [2023-08-26 18:34:55,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:55,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 175 transitions. [2023-08-26 18:34:55,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,218 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,220 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 49 flow. Second operand 2 states and 175 transitions. [2023-08-26 18:34:55,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 71 flow [2023-08-26 18:34:55,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 18 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:34:55,223 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 38 flow [2023-08-26 18:34:55,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-26 18:34:55,228 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 18:34:55,228 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 38 flow [2023-08-26 18:34:55,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:55,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:34:55,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:34:55,229 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:55,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:55,229 INFO L85 PathProgramCache]: Analyzing trace with hash 9578229, now seen corresponding path program 1 times [2023-08-26 18:34:55,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:55,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145495157] [2023-08-26 18:34:55,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:55,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:55,303 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 18:34:55,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:55,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145495157] [2023-08-26 18:34:55,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145495157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:55,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:34:55,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:34:55,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780413153] [2023-08-26 18:34:55,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:55,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:34:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:55,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:34:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:34:55,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 18:34:55,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:55,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 18:34:55,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:55,386 INFO L124 PetriNetUnfolderBase]: 36/89 cut-off events. [2023-08-26 18:34:55,386 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:34:55,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 89 events. 36/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 319 event pairs, 35 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 178. Up to 87 conditions per place. [2023-08-26 18:34:55,388 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 15 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 18:34:55,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 74 flow [2023-08-26 18:34:55,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:34:55,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:34:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-26 18:34:55,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601226993865031 [2023-08-26 18:34:55,394 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-26 18:34:55,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-26 18:34:55,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:55,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-26 18:34:55,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,400 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 38 flow. Second operand 3 states and 225 transitions. [2023-08-26 18:34:55,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 74 flow [2023-08-26 18:34:55,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:34:55,401 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 50 flow [2023-08-26 18:34:55,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-08-26 18:34:55,402 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-08-26 18:34:55,402 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 50 flow [2023-08-26 18:34:55,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:55,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:34:55,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:34:55,406 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:55,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:55,409 INFO L85 PathProgramCache]: Analyzing trace with hash 296346395, now seen corresponding path program 1 times [2023-08-26 18:34:55,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:55,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493950868] [2023-08-26 18:34:55,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:55,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:34:55,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:55,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493950868] [2023-08-26 18:34:55,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493950868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:34:55,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873018466] [2023-08-26 18:34:55,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:55,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:34:55,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:34:55,506 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 18:34:55,567 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 18:34:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:55,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 18:34:55,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:34:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:34:55,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:34:55,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:34:55,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873018466] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:34:55,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:34:55,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 18:34:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134665314] [2023-08-26 18:34:55,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:34:55,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:34:55,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:55,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:34:55,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:34:55,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 18:34:55,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:55,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 18:34:55,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:55,741 INFO L124 PetriNetUnfolderBase]: 36/92 cut-off events. [2023-08-26 18:34:55,741 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:34:55,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 92 events. 36/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 317 event pairs, 35 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 192. Up to 87 conditions per place. [2023-08-26 18:34:55,742 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 15 selfloop transitions, 5 changer transitions 0/22 dead transitions. [2023-08-26 18:34:55,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 102 flow [2023-08-26 18:34:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:34:55,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:34:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 437 transitions. [2023-08-26 18:34:55,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44683026584867075 [2023-08-26 18:34:55,744 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 437 transitions. [2023-08-26 18:34:55,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 437 transitions. [2023-08-26 18:34:55,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:55,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 437 transitions. [2023-08-26 18:34:55,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 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 18:34:55,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 163.0) internal successors, (1141), 7 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,748 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 163.0) internal successors, (1141), 7 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,748 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 6 states and 437 transitions. [2023-08-26 18:34:55,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 102 flow [2023-08-26 18:34:55,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 98 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 18:34:55,750 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 82 flow [2023-08-26 18:34:55,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-26 18:34:55,750 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 18:34:55,750 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 82 flow [2023-08-26 18:34:55,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:55,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:55,751 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 18:34:55,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 18:34:55,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:34:55,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:55,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:55,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1723007093, now seen corresponding path program 2 times [2023-08-26 18:34:55,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:55,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920085777] [2023-08-26 18:34:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:55,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:34:56,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:56,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920085777] [2023-08-26 18:34:56,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920085777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:34:56,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475450700] [2023-08-26 18:34:56,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 18:34:56,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:34:56,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:34:56,082 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 18:34:56,090 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 18:34:56,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 18:34:56,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 18:34:56,148 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 18:34:56,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:34:56,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 18:34:56,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-08-26 18:34:56,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 18:34:56,289 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:34:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475450700] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:56,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:34:56,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 18:34:56,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915294365] [2023-08-26 18:34:56,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:56,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:34:56,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:56,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:34:56,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:34:56,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 163 [2023-08-26 18:34:56,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:56,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 163 [2023-08-26 18:34:56,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:56,331 INFO L124 PetriNetUnfolderBase]: 36/91 cut-off events. [2023-08-26 18:34:56,331 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:34:56,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 91 events. 36/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 256 event pairs, 35 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 201. Up to 90 conditions per place. [2023-08-26 18:34:56,333 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 19 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-26 18:34:56,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 120 flow [2023-08-26 18:34:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:34:56,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:34:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 18:34:56,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783231083844581 [2023-08-26 18:34:56,335 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 18:34:56,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 18:34:56,335 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:56,335 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 18:34:56,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,337 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 82 flow. Second operand 3 states and 185 transitions. [2023-08-26 18:34:56,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 120 flow [2023-08-26 18:34:56,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 106 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 18:34:56,343 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 68 flow [2023-08-26 18:34:56,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=21} [2023-08-26 18:34:56,344 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 18:34:56,345 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 68 flow [2023-08-26 18:34:56,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:56,345 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 18:34:56,356 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 18:34:56,549 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,SelfDestructingSolverStorable3 [2023-08-26 18:34:56,550 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:56,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:56,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1723007079, now seen corresponding path program 1 times [2023-08-26 18:34:56,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:56,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29503048] [2023-08-26 18:34:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:56,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:56,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:56,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:34:56,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29503048] [2023-08-26 18:34:56,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29503048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:34:56,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829405272] [2023-08-26 18:34:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:56,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:34:56,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:34:56,624 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 18:34:56,677 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 18:34:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:56,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 18:34:56,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:34:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:34:56,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:34:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:34:56,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829405272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:34:56,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:34:56,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 18:34:56,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38077545] [2023-08-26 18:34:56,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:34:56,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 18:34:56,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 18:34:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 18:34:56,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 18:34:56,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 68 flow. Second operand has 13 states, 13 states have (on average 70.23076923076923) internal successors, (913), 13 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:56,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 18:34:56,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:56,861 INFO L124 PetriNetUnfolderBase]: 29/83 cut-off events. [2023-08-26 18:34:56,861 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-26 18:34:56,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 83 events. 29/83 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 248 event pairs, 28 based on Foata normal form. 6/67 useless extension candidates. Maximal degree in co-relation 190. Up to 72 conditions per place. [2023-08-26 18:34:56,862 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 14 selfloop transitions, 11 changer transitions 0/27 dead transitions. [2023-08-26 18:34:56,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 27 transitions, 154 flow [2023-08-26 18:34:56,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 18:34:56,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 18:34:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 859 transitions. [2023-08-26 18:34:56,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439161554192229 [2023-08-26 18:34:56,865 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 859 transitions. [2023-08-26 18:34:56,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 859 transitions. [2023-08-26 18:34:56,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:56,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 859 transitions. [2023-08-26 18:34:56,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 71.58333333333333) internal successors, (859), 12 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 163.0) internal successors, (2119), 13 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,871 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 163.0) internal successors, (2119), 13 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,871 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 68 flow. Second operand 12 states and 859 transitions. [2023-08-26 18:34:56,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 27 transitions, 154 flow [2023-08-26 18:34:56,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 27 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:34:56,874 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 151 flow [2023-08-26 18:34:56,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=151, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-08-26 18:34:56,876 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2023-08-26 18:34:56,876 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 151 flow [2023-08-26 18:34:56,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 70.23076923076923) internal successors, (913), 13 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:56,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:56,876 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 18:34:56,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 18:34:57,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:34:57,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:57,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:57,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1850859175, now seen corresponding path program 2 times [2023-08-26 18:34:57,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:57,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370420444] [2023-08-26 18:34:57,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:57,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:57,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 18:34:57,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:57,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370420444] [2023-08-26 18:34:57,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370420444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:57,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:34:57,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:34:57,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581961138] [2023-08-26 18:34:57,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:57,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:34:57,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:34:57,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:34:57,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 163 [2023-08-26 18:34:57,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:57,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 163 [2023-08-26 18:34:57,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:57,412 INFO L124 PetriNetUnfolderBase]: 31/86 cut-off events. [2023-08-26 18:34:57,413 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 18:34:57,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 86 events. 31/86 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 195 event pairs, 30 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 221. Up to 73 conditions per place. [2023-08-26 18:34:57,413 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 23 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-26 18:34:57,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 26 transitions, 199 flow [2023-08-26 18:34:57,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:34:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:34:57,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 228 transitions. [2023-08-26 18:34:57,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496932515337423 [2023-08-26 18:34:57,415 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 228 transitions. [2023-08-26 18:34:57,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 228 transitions. [2023-08-26 18:34:57,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:57,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 228 transitions. [2023-08-26 18:34:57,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,419 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,419 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 151 flow. Second operand 4 states and 228 transitions. [2023-08-26 18:34:57,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 26 transitions, 199 flow [2023-08-26 18:34:57,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 151 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 18:34:57,424 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 105 flow [2023-08-26 18:34:57,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-08-26 18:34:57,427 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-08-26 18:34:57,427 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 105 flow [2023-08-26 18:34:57,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:57,427 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 18:34:57,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:34:57,428 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:57,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1850859174, now seen corresponding path program 1 times [2023-08-26 18:34:57,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:57,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261545173] [2023-08-26 18:34:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:57,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 18:34:57,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:57,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261545173] [2023-08-26 18:34:57,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261545173] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:57,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:34:57,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:34:57,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583938588] [2023-08-26 18:34:57,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:57,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:34:57,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:34:57,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 18:34:57,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 163 [2023-08-26 18:34:57,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:57,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 163 [2023-08-26 18:34:57,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:57,602 INFO L124 PetriNetUnfolderBase]: 31/85 cut-off events. [2023-08-26 18:34:57,602 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 18:34:57,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 85 events. 31/85 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 189 event pairs, 24 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 198. Up to 72 conditions per place. [2023-08-26 18:34:57,605 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 25 selfloop transitions, 2 changer transitions 4/31 dead transitions. [2023-08-26 18:34:57,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 177 flow [2023-08-26 18:34:57,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:34:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:34:57,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-26 18:34:57,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37627811860940696 [2023-08-26 18:34:57,607 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-26 18:34:57,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-26 18:34:57,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:57,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-26 18:34:57,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,609 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 105 flow. Second operand 3 states and 184 transitions. [2023-08-26 18:34:57,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 177 flow [2023-08-26 18:34:57,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 31 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:34:57,613 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 100 flow [2023-08-26 18:34:57,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2023-08-26 18:34:57,614 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-26 18:34:57,614 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 100 flow [2023-08-26 18:34:57,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:57,614 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-26 18:34:57,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:34:57,616 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:57,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:57,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1542060112, now seen corresponding path program 1 times [2023-08-26 18:34:57,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:57,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561154332] [2023-08-26 18:34:57,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:57,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 18:34:57,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:57,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561154332] [2023-08-26 18:34:57,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561154332] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:57,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:34:57,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:34:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830158604] [2023-08-26 18:34:57,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:57,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:34:57,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:34:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:34:57,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 163 [2023-08-26 18:34:57,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:57,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 163 [2023-08-26 18:34:57,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:57,829 INFO L124 PetriNetUnfolderBase]: 10/43 cut-off events. [2023-08-26 18:34:57,829 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 18:34:57,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 43 events. 10/43 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 6/48 useless extension candidates. Maximal degree in co-relation 117. Up to 18 conditions per place. [2023-08-26 18:34:57,830 INFO L140 encePairwiseOnDemand]: 157/163 looper letters, 25 selfloop transitions, 4 changer transitions 1/30 dead transitions. [2023-08-26 18:34:57,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 30 transitions, 176 flow [2023-08-26 18:34:57,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:34:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:34:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 273 transitions. [2023-08-26 18:34:57,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33496932515337424 [2023-08-26 18:34:57,832 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 273 transitions. [2023-08-26 18:34:57,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 273 transitions. [2023-08-26 18:34:57,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:57,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 273 transitions. [2023-08-26 18:34:57,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,834 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,835 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 100 flow. Second operand 5 states and 273 transitions. [2023-08-26 18:34:57,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 30 transitions, 176 flow [2023-08-26 18:34:57,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:34:57,836 INFO L231 Difference]: Finished difference. Result has 47 places, 25 transitions, 126 flow [2023-08-26 18:34:57,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=47, PETRI_TRANSITIONS=25} [2023-08-26 18:34:57,838 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2023-08-26 18:34:57,838 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 25 transitions, 126 flow [2023-08-26 18:34:57,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:57,839 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:34:57,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:34:57,839 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:57,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash 964087520, now seen corresponding path program 1 times [2023-08-26 18:34:57,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:57,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939063843] [2023-08-26 18:34:57,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 18:34:57,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939063843] [2023-08-26 18:34:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939063843] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:57,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:34:57,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:34:57,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174890317] [2023-08-26 18:34:57,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:57,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:34:57,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:57,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:34:57,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:34:57,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 163 [2023-08-26 18:34:57,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 25 transitions, 126 flow. Second operand has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:57,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:57,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 163 [2023-08-26 18:34:57,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:58,056 INFO L124 PetriNetUnfolderBase]: 11/51 cut-off events. [2023-08-26 18:34:58,056 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-26 18:34:58,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 51 events. 11/51 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 99 event pairs, 1 based on Foata normal form. 2/53 useless extension candidates. Maximal degree in co-relation 163. Up to 18 conditions per place. [2023-08-26 18:34:58,057 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 22 selfloop transitions, 9 changer transitions 5/36 dead transitions. [2023-08-26 18:34:58,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 36 transitions, 236 flow [2023-08-26 18:34:58,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 18:34:58,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 18:34:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 450 transitions. [2023-08-26 18:34:58,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3067484662576687 [2023-08-26 18:34:58,059 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 450 transitions. [2023-08-26 18:34:58,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 450 transitions. [2023-08-26 18:34:58,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:58,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 450 transitions. [2023-08-26 18:34:58,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 163.0) internal successors, (1630), 10 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,064 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 163.0) internal successors, (1630), 10 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,064 INFO L175 Difference]: Start difference. First operand has 47 places, 25 transitions, 126 flow. Second operand 9 states and 450 transitions. [2023-08-26 18:34:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 36 transitions, 236 flow [2023-08-26 18:34:58,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 36 transitions, 229 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 18:34:58,066 INFO L231 Difference]: Finished difference. Result has 54 places, 28 transitions, 160 flow [2023-08-26 18:34:58,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=160, PETRI_PLACES=54, PETRI_TRANSITIONS=28} [2023-08-26 18:34:58,067 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-08-26 18:34:58,067 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 28 transitions, 160 flow [2023-08-26 18:34:58,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:58,068 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:34:58,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 18:34:58,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:58,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:58,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1816763600, now seen corresponding path program 2 times [2023-08-26 18:34:58,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:58,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477229748] [2023-08-26 18:34:58,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:58,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:58,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 18:34:58,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:58,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477229748] [2023-08-26 18:34:58,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477229748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:58,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:34:58,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 18:34:58,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259371524] [2023-08-26 18:34:58,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:58,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 18:34:58,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 18:34:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 18:34:58,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 163 [2023-08-26 18:34:58,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 28 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 48.375) internal successors, (387), 8 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:58,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 163 [2023-08-26 18:34:58,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:58,282 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-08-26 18:34:58,283 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-26 18:34:58,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 38 events. 6/38 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 2/40 useless extension candidates. Maximal degree in co-relation 140. Up to 15 conditions per place. [2023-08-26 18:34:58,283 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 18 selfloop transitions, 3 changer transitions 11/32 dead transitions. [2023-08-26 18:34:58,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 32 transitions, 231 flow [2023-08-26 18:34:58,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 18:34:58,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 18:34:58,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2023-08-26 18:34:58,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30850131463628394 [2023-08-26 18:34:58,285 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 352 transitions. [2023-08-26 18:34:58,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 352 transitions. [2023-08-26 18:34:58,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:58,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 352 transitions. [2023-08-26 18:34:58,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,288 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,289 INFO L175 Difference]: Start difference. First operand has 54 places, 28 transitions, 160 flow. Second operand 7 states and 352 transitions. [2023-08-26 18:34:58,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 32 transitions, 231 flow [2023-08-26 18:34:58,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 32 transitions, 215 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-26 18:34:58,292 INFO L231 Difference]: Finished difference. Result has 55 places, 21 transitions, 116 flow [2023-08-26 18:34:58,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=55, PETRI_TRANSITIONS=21} [2023-08-26 18:34:58,293 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2023-08-26 18:34:58,293 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 21 transitions, 116 flow [2023-08-26 18:34:58,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 48.375) internal successors, (387), 8 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:34:58,293 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:34:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:34:58,293 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 18:34:58,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:34:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 964061480, now seen corresponding path program 3 times [2023-08-26 18:34:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:34:58,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222896240] [2023-08-26 18:34:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:34:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:34:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:34:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 18:34:58,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:34:58,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222896240] [2023-08-26 18:34:58,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222896240] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:34:58,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:34:58,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 18:34:58,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327629240] [2023-08-26 18:34:58,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:34:58,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:34:58,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:34:58,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:34:58,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:34:58,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 163 [2023-08-26 18:34:58,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 21 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:34:58,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 163 [2023-08-26 18:34:58,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:34:58,453 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-26 18:34:58,453 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-26 18:34:58,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 20 events. 1/20 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 77. Up to 13 conditions per place. [2023-08-26 18:34:58,453 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-26 18:34:58,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 20 transitions, 150 flow [2023-08-26 18:34:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:34:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:34:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2023-08-26 18:34:58,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.301840490797546 [2023-08-26 18:34:58,455 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 246 transitions. [2023-08-26 18:34:58,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 246 transitions. [2023-08-26 18:34:58,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:34:58,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 246 transitions. [2023-08-26 18:34:58,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,457 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,457 INFO L175 Difference]: Start difference. First operand has 55 places, 21 transitions, 116 flow. Second operand 5 states and 246 transitions. [2023-08-26 18:34:58,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 20 transitions, 150 flow [2023-08-26 18:34:58,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 20 transitions, 134 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-26 18:34:58,459 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-26 18:34:58,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-26 18:34:58,459 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-26 18:34:58,459 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-26 18:34:58,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:34:58,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2023-08-26 18:34:58,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2023-08-26 18:34:58,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-08-26 18:34:58,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-08-26 18:34:58,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-08-26 18:34:58,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-08-26 18:34:58,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 15 remaining) [2023-08-26 18:34:58,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-08-26 18:34:58,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-08-26 18:34:58,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-08-26 18:34:58,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2023-08-26 18:34:58,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2023-08-26 18:34:58,464 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2023-08-26 18:34:58,464 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2023-08-26 18:34:58,464 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 15 remaining) [2023-08-26 18:34:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:34:58,464 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1] [2023-08-26 18:34:58,468 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:34:58,469 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:34:58,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:34:58 BasicIcfg [2023-08-26 18:34:58,471 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:34:58,472 INFO L158 Benchmark]: Toolchain (without parser) took 6808.34ms. Allocated memory was 331.4MB in the beginning and 398.5MB in the end (delta: 67.1MB). Free memory was 305.9MB in the beginning and 235.4MB in the end (delta: 70.5MB). Peak memory consumption was 138.4MB. Max. memory is 16.0GB. [2023-08-26 18:34:58,472 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 331.4MB. Free memory was 308.5MB in the beginning and 308.5MB in the end (delta: 33.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:34:58,472 INFO L158 Benchmark]: CACSL2BoogieTranslator took 611.00ms. Allocated memory is still 331.4MB. Free memory was 305.3MB in the beginning and 277.4MB in the end (delta: 27.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 18:34:58,472 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.20ms. Allocated memory is still 331.4MB. Free memory was 277.4MB in the beginning and 275.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:34:58,473 INFO L158 Benchmark]: Boogie Preprocessor took 37.75ms. Allocated memory is still 331.4MB. Free memory was 275.3MB in the beginning and 273.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:34:58,473 INFO L158 Benchmark]: RCFGBuilder took 365.71ms. Allocated memory is still 331.4MB. Free memory was 273.4MB in the beginning and 258.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 18:34:58,473 INFO L158 Benchmark]: TraceAbstraction took 5721.00ms. Allocated memory was 331.4MB in the beginning and 398.5MB in the end (delta: 67.1MB). Free memory was 257.9MB in the beginning and 235.4MB in the end (delta: 22.4MB). Peak memory consumption was 90.2MB. Max. memory is 16.0GB. [2023-08-26 18:34:58,474 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 331.4MB. Free memory was 308.5MB in the beginning and 308.5MB in the end (delta: 33.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 611.00ms. Allocated memory is still 331.4MB. Free memory was 305.3MB in the beginning and 277.4MB in the end (delta: 27.9MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.20ms. Allocated memory is still 331.4MB. Free memory was 277.4MB in the beginning and 275.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 37.75ms. Allocated memory is still 331.4MB. Free memory was 275.3MB in the beginning and 273.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 365.71ms. Allocated memory is still 331.4MB. Free memory was 273.4MB in the beginning and 258.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5721.00ms. Allocated memory was 331.4MB in the beginning and 398.5MB in the end (delta: 67.1MB). Free memory was 257.9MB in the beginning and 235.4MB in the end (delta: 22.4MB). Peak memory consumption was 90.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 249]: Unsoundness Warning unspecified type, defaulting to int C: short [249] - GenericResultAtLocation [Line: 249]: Unsoundness Warning unspecified type, defaulting to int C: short [249] - GenericResultAtLocation [Line: 741]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [741] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 80 PlacesBefore, 26 PlacesAfterwards, 80 TransitionsBefore, 23 TransitionsAfterwards, 988 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 3 ConcurrentYvCompositions, 3 ChoiceCompositions, 82 TotalNumberOfCompositions, 1784 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1166, independent: 1064, independent conditional: 0, independent unconditional: 1064, dependent: 102, dependent conditional: 0, dependent unconditional: 102, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 574, independent: 554, independent conditional: 0, independent unconditional: 554, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1166, independent: 510, independent conditional: 0, independent unconditional: 510, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 574, unknown conditional: 0, unknown unconditional: 574] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 105 locations, 15 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: 5.6s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 119 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 424 IncrementalHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 4 mSDtfsCounter, 424 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=9, InterpolantAutomatonStates: 59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 151 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 966 SizeOfPredicates, 2 NumberOfNonLiveVariables, 247 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 9 PerfectInterpolantSequences, 340/383 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:34:58,496 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...