/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_07-tricky_address2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:23:35,020 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:23:35,103 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 12:23:35,108 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:23:35,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:23:35,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:23:35,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:23:35,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:23:35,145 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:23:35,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:23:35,149 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:23:35,149 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:23:35,149 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:23:35,150 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:23:35,150 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:23:35,151 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:23:35,151 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:23:35,151 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:23:35,151 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:23:35,151 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:23:35,152 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:23:35,152 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:23:35,153 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:23:35,153 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:23:35,153 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:23:35,153 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:23:35,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:23:35,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:23:35,154 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:23:35,154 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:23:35,155 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:23:35,155 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:23:35,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:23:35,156 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:23:35,156 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:23:35,156 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:23:35,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:23:35,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:23:35,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:23:35,482 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:23:35,482 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:23:35,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_07-tricky_address2.i [2023-08-26 12:23:36,728 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:23:37,070 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:23:37,071 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_07-tricky_address2.i [2023-08-26 12:23:37,083 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77d1379f7/e11a4c9f16664177b2050bb6d956e09a/FLAG0f5d7bc7c [2023-08-26 12:23:37,094 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77d1379f7/e11a4c9f16664177b2050bb6d956e09a [2023-08-26 12:23:37,096 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:23:37,097 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:23:37,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:23:37,102 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:23:37,104 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:23:37,105 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,106 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32a1894f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37, skipping insertion in model container [2023-08-26 12:23:37,106 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,152 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:23:37,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:23:37,617 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:23:37,650 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 12:23:37,652 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 12:23:37,658 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [741] [2023-08-26 12:23:37,670 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:23:37,737 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:23:37,737 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37 WrapperNode [2023-08-26 12:23:37,738 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:23:37,739 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:23:37,739 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:23:37,739 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:23:37,745 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,776 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,801 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-08-26 12:23:37,801 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:23:37,802 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:23:37,802 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:23:37,802 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:23:37,810 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,821 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,822 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,830 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,832 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,833 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,834 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,836 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:23:37,842 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:23:37,842 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:23:37,842 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:23:37,843 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (1/1) ... [2023-08-26 12:23:37,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:23:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:37,875 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 12:23:37,886 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 12:23:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:23:37,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:23:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:23:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:23:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:23:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:23:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:23:37,911 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:23:37,911 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:23:37,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:23:37,913 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 12:23:38,072 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:23:38,074 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:23:38,288 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:23:38,294 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:23:38,295 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 12:23:38,296 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:23:38 BoogieIcfgContainer [2023-08-26 12:23:38,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:23:38,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:23:38,299 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:23:38,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:23:38,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:23:37" (1/3) ... [2023-08-26 12:23:38,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206c376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:23:38, skipping insertion in model container [2023-08-26 12:23:38,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:23:37" (2/3) ... [2023-08-26 12:23:38,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206c376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:23:38, skipping insertion in model container [2023-08-26 12:23:38,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:23:38" (3/3) ... [2023-08-26 12:23:38,304 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_07-tricky_address2.i [2023-08-26 12:23:38,319 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:23:38,319 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 12:23:38,319 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:23:38,368 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:23:38,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 81 transitions, 167 flow [2023-08-26 12:23:38,430 INFO L124 PetriNetUnfolderBase]: 4/80 cut-off events. [2023-08-26 12:23:38,430 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:38,434 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 12:23:38,434 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 81 transitions, 167 flow [2023-08-26 12:23:38,438 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 80 transitions, 163 flow [2023-08-26 12:23:38,441 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:23:38,449 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 80 transitions, 163 flow [2023-08-26 12:23:38,452 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 80 transitions, 163 flow [2023-08-26 12:23:38,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 80 transitions, 163 flow [2023-08-26 12:23:38,471 INFO L124 PetriNetUnfolderBase]: 4/80 cut-off events. [2023-08-26 12:23:38,472 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:38,473 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 12:23:38,474 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-08-26 12:23:40,503 INFO L134 LiptonReduction]: Checked pairs total: 1784 [2023-08-26 12:23:40,504 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-26 12:23:40,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:23:40,521 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;@579a2f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:23:40,522 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-26 12:23:40,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:23:40,524 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-26 12:23:40,524 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:40,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:40,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:23:40,525 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 12:23:40,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:40,530 INFO L85 PathProgramCache]: Analyzing trace with hash 9959, now seen corresponding path program 1 times [2023-08-26 12:23:40,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:40,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831006184] [2023-08-26 12:23:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:40,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:40,653 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 12:23:40,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:40,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831006184] [2023-08-26 12:23:40,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831006184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:40,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:40,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:23:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386016228] [2023-08-26 12:23:40,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:40,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:23:40,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:23:40,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:23:40,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 163 [2023-08-26 12:23:40,689 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 12:23:40,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:40,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 163 [2023-08-26 12:23:40,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:40,771 INFO L124 PetriNetUnfolderBase]: 36/88 cut-off events. [2023-08-26 12:23:40,772 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:40,772 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 12:23:40,775 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 16 selfloop transitions, 0 changer transitions 0/18 dead transitions. [2023-08-26 12:23:40,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 71 flow [2023-08-26 12:23:40,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:23:40,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:23:40,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 175 transitions. [2023-08-26 12:23:40,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368098159509203 [2023-08-26 12:23:40,789 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 175 transitions. [2023-08-26 12:23:40,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 175 transitions. [2023-08-26 12:23:40,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:40,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 175 transitions. [2023-08-26 12:23:40,799 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 12:23:40,805 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 12:23:40,805 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 12:23:40,807 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 49 flow. Second operand 2 states and 175 transitions. [2023-08-26 12:23:40,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 71 flow [2023-08-26 12:23:40,810 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 12:23:40,812 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 38 flow [2023-08-26 12:23:40,813 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 12:23:40,817 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 12:23:40,817 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 38 flow [2023-08-26 12:23:40,818 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 12:23:40,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:40,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:23:40,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:23:40,818 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 12:23:40,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:40,820 INFO L85 PathProgramCache]: Analyzing trace with hash 9578229, now seen corresponding path program 1 times [2023-08-26 12:23:40,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:40,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941667440] [2023-08-26 12:23:40,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:40,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:40,922 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 12:23:40,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:40,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941667440] [2023-08-26 12:23:40,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941667440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:40,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:40,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:23:40,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420323592] [2023-08-26 12:23:40,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:40,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:23:40,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:40,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:23:40,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:23:40,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 12:23:40,926 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 12:23:40,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:40,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 12:23:40,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:40,970 INFO L124 PetriNetUnfolderBase]: 36/89 cut-off events. [2023-08-26 12:23:40,970 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:40,971 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 12:23:40,971 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 15 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 12:23:40,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 74 flow [2023-08-26 12:23:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:23:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:23:40,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-26 12:23:40,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601226993865031 [2023-08-26 12:23:40,974 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-26 12:23:40,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-26 12:23:40,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:40,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-26 12:23:40,976 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 12:23:40,977 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 12:23:40,977 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 12:23:40,977 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 38 flow. Second operand 3 states and 225 transitions. [2023-08-26 12:23:40,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 74 flow [2023-08-26 12:23:40,978 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 12:23:40,978 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 50 flow [2023-08-26 12:23:40,979 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 12:23:40,979 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-08-26 12:23:40,979 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 50 flow [2023-08-26 12:23:40,980 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 12:23:40,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:40,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:23:40,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:23:40,980 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 12:23:40,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:40,981 INFO L85 PathProgramCache]: Analyzing trace with hash 296346395, now seen corresponding path program 1 times [2023-08-26 12:23:40,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:40,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344874667] [2023-08-26 12:23:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:40,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:41,046 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 12:23:41,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:41,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344874667] [2023-08-26 12:23:41,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344874667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:23:41,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638472514] [2023-08-26 12:23:41,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:41,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:23:41,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:41,053 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 12:23:41,092 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 12:23:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:41,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:23:41,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:23:41,183 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 12:23:41,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:23:41,199 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 12:23:41,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638472514] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:23:41,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:23:41,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 12:23:41,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436954155] [2023-08-26 12:23:41,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:23:41,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:23:41,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:41,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:23:41,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:23:41,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 12:23:41,206 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 12:23:41,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:41,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 12:23:41,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:41,278 INFO L124 PetriNetUnfolderBase]: 36/92 cut-off events. [2023-08-26 12:23:41,278 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:23:41,279 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 12:23:41,280 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 15 selfloop transitions, 5 changer transitions 0/22 dead transitions. [2023-08-26 12:23:41,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 102 flow [2023-08-26 12:23:41,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:23:41,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:23:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 437 transitions. [2023-08-26 12:23:41,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44683026584867075 [2023-08-26 12:23:41,284 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 437 transitions. [2023-08-26 12:23:41,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 437 transitions. [2023-08-26 12:23:41,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:41,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 437 transitions. [2023-08-26 12:23:41,287 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 12:23:41,290 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 12:23:41,291 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 12:23:41,291 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 6 states and 437 transitions. [2023-08-26 12:23:41,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 102 flow [2023-08-26 12:23:41,292 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 12:23:41,292 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 82 flow [2023-08-26 12:23:41,293 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 12:23:41,294 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 12:23:41,294 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 82 flow [2023-08-26 12:23:41,294 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 12:23:41,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:41,295 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 12:23:41,304 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 12:23:41,500 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 12:23:41,500 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 12:23:41,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1723007093, now seen corresponding path program 2 times [2023-08-26 12:23:41,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:41,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890426260] [2023-08-26 12:23:41,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:41,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:41,674 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 12:23:41,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890426260] [2023-08-26 12:23:41,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890426260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:23:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384767943] [2023-08-26 12:23:41,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:23:41,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:23:41,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:41,679 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 12:23:41,691 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 12:23:41,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 12:23:41,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:23:41,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 12:23:41,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:23:41,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:23:41,869 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 12:23:41,900 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 12:23:41,900 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:23:41,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384767943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:41,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:23:41,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 12:23:41,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861948721] [2023-08-26 12:23:41,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:41,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:23:41,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:41,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:23:41,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 12:23:41,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 163 [2023-08-26 12:23:41,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 82 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 12:23:41,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:41,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 163 [2023-08-26 12:23:41,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:41,945 INFO L124 PetriNetUnfolderBase]: 43/105 cut-off events. [2023-08-26 12:23:41,946 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 12:23:41,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 105 events. 43/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 322 event pairs, 42 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 230. Up to 105 conditions per place. [2023-08-26 12:23:41,947 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 20 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-26 12:23:41,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 122 flow [2023-08-26 12:23:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:23:41,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:23:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2023-08-26 12:23:41,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36809815950920244 [2023-08-26 12:23:41,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2023-08-26 12:23:41,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2023-08-26 12:23:41,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:41,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2023-08-26 12:23:41,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:41,950 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 12:23:41,951 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 12:23:41,951 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 82 flow. Second operand 3 states and 180 transitions. [2023-08-26 12:23:41,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 122 flow [2023-08-26 12:23:41,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 108 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 12:23:41,952 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 68 flow [2023-08-26 12:23:41,953 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 12:23:41,953 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 12:23:41,954 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 68 flow [2023-08-26 12:23:41,954 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 12:23:41,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:41,954 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 12:23:41,963 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 12:23:42,159 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 12:23:42,160 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 12:23:42,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1723007079, now seen corresponding path program 1 times [2023-08-26 12:23:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:42,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270242697] [2023-08-26 12:23:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:42,228 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 12:23:42,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270242697] [2023-08-26 12:23:42,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270242697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:23:42,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163262032] [2023-08-26 12:23:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:23:42,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:23:42,231 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 12:23:42,256 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 12:23:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:42,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:23:42,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:23:42,324 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 12:23:42,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:23:42,379 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 12:23:42,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163262032] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:23:42,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:23:42,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 12:23:42,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828046411] [2023-08-26 12:23:42,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:23:42,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 12:23:42,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:42,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 12:23:42,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 12:23:42,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 12:23:42,385 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 12:23:42,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:42,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 12:23:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:42,451 INFO L124 PetriNetUnfolderBase]: 29/83 cut-off events. [2023-08-26 12:23:42,451 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-26 12:23:42,451 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 254 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 12:23:42,452 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 14 selfloop transitions, 11 changer transitions 0/27 dead transitions. [2023-08-26 12:23:42,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 27 transitions, 154 flow [2023-08-26 12:23:42,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:23:42,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:23:42,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 859 transitions. [2023-08-26 12:23:42,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439161554192229 [2023-08-26 12:23:42,455 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 859 transitions. [2023-08-26 12:23:42,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 859 transitions. [2023-08-26 12:23:42,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:42,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 859 transitions. [2023-08-26 12:23:42,458 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 12:23:42,461 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 12:23:42,462 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 12:23:42,462 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 68 flow. Second operand 12 states and 859 transitions. [2023-08-26 12:23:42,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 27 transitions, 154 flow [2023-08-26 12:23:42,464 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 12:23:42,465 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 151 flow [2023-08-26 12:23:42,465 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 12:23:42,467 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2023-08-26 12:23:42,467 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 151 flow [2023-08-26 12:23:42,468 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 12:23:42,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:42,469 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 12:23:42,482 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 12:23:42,679 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 12:23:42,680 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 12:23:42,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1850859175, now seen corresponding path program 2 times [2023-08-26 12:23:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:42,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291725689] [2023-08-26 12:23:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:42,879 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 12:23:42,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:42,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291725689] [2023-08-26 12:23:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291725689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:42,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:42,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:23:42,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421249023] [2023-08-26 12:23:42,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:42,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:23:42,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:42,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:23:42,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:23:42,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 163 [2023-08-26 12:23:42,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:42,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:42,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 163 [2023-08-26 12:23:42,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:42,944 INFO L124 PetriNetUnfolderBase]: 37/98 cut-off events. [2023-08-26 12:23:42,944 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 12:23:42,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 98 events. 37/98 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 244 event pairs, 36 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 246. Up to 86 conditions per place. [2023-08-26 12:23:42,945 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 24 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-26 12:23:42,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 26 transitions, 201 flow [2023-08-26 12:23:42,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:23:42,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:23:42,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2023-08-26 12:23:42,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3389570552147239 [2023-08-26 12:23:42,947 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 221 transitions. [2023-08-26 12:23:42,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 221 transitions. [2023-08-26 12:23:42,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:42,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 221 transitions. [2023-08-26 12:23:42,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 12:23:42,949 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 12:23:42,950 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 12:23:42,950 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 151 flow. Second operand 4 states and 221 transitions. [2023-08-26 12:23:42,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 26 transitions, 201 flow [2023-08-26 12:23:42,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 153 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 12:23:42,953 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 105 flow [2023-08-26 12:23:42,953 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 12:23:42,954 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-08-26 12:23:42,954 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 105 flow [2023-08-26 12:23:42,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.25) internal successors, (209), 4 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:42,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:42,955 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 12:23:42,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:23:42,955 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 12:23:42,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1850859174, now seen corresponding path program 1 times [2023-08-26 12:23:42,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:42,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736664191] [2023-08-26 12:23:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:42,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:43,091 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 12:23:43,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:43,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736664191] [2023-08-26 12:23:43,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736664191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:43,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:43,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:23:43,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915033688] [2023-08-26 12:23:43,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:43,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:23:43,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:43,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:23:43,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:23:43,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 163 [2023-08-26 12:23:43,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 105 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 12:23:43,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:43,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 163 [2023-08-26 12:23:43,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:43,147 INFO L124 PetriNetUnfolderBase]: 20/67 cut-off events. [2023-08-26 12:23:43,147 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 12:23:43,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 67 events. 20/67 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 16 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 162. Up to 54 conditions per place. [2023-08-26 12:23:43,148 INFO L140 encePairwiseOnDemand]: 156/163 looper letters, 22 selfloop transitions, 2 changer transitions 7/31 dead transitions. [2023-08-26 12:23:43,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 177 flow [2023-08-26 12:23:43,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:23:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:23:43,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2023-08-26 12:23:43,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36349693251533743 [2023-08-26 12:23:43,154 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 237 transitions. [2023-08-26 12:23:43,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 237 transitions. [2023-08-26 12:23:43,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:43,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 237 transitions. [2023-08-26 12:23:43,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:43,156 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 12:23:43,157 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 12:23:43,157 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 105 flow. Second operand 4 states and 237 transitions. [2023-08-26 12:23:43,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 177 flow [2023-08-26 12:23:43,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 31 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:23:43,161 INFO L231 Difference]: Finished difference. Result has 47 places, 23 transitions, 112 flow [2023-08-26 12:23:43,161 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=4, PETRI_FLOW=112, PETRI_PLACES=47, PETRI_TRANSITIONS=23} [2023-08-26 12:23:43,162 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2023-08-26 12:23:43,162 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 23 transitions, 112 flow [2023-08-26 12:23:43,162 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 12:23:43,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:23:43,162 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:23:43,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:23:43,164 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 12:23:43,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:23:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash -764022512, now seen corresponding path program 1 times [2023-08-26 12:23:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:23:43,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938284246] [2023-08-26 12:23:43,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:23:43,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:23:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:23:43,301 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 12:23:43,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:23:43,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938284246] [2023-08-26 12:23:43,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938284246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:23:43,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:23:43,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:23:43,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439516672] [2023-08-26 12:23:43,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:23:43,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:23:43,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:23:43,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:23:43,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:23:43,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 163 [2023-08-26 12:23:43,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 23 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:43,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:23:43,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 163 [2023-08-26 12:23:43,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:23:43,352 INFO L124 PetriNetUnfolderBase]: 10/40 cut-off events. [2023-08-26 12:23:43,352 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2023-08-26 12:23:43,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 40 events. 10/40 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 8 based on Foata normal form. 2/42 useless extension candidates. Maximal degree in co-relation 120. Up to 24 conditions per place. [2023-08-26 12:23:43,353 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-26 12:23:43,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 22 transitions, 148 flow [2023-08-26 12:23:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:23:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:23:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 210 transitions. [2023-08-26 12:23:43,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3220858895705521 [2023-08-26 12:23:43,355 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 210 transitions. [2023-08-26 12:23:43,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 210 transitions. [2023-08-26 12:23:43,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:23:43,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 210 transitions. [2023-08-26 12:23:43,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:43,357 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 12:23:43,357 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 12:23:43,357 INFO L175 Difference]: Start difference. First operand has 47 places, 23 transitions, 112 flow. Second operand 4 states and 210 transitions. [2023-08-26 12:23:43,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 22 transitions, 148 flow [2023-08-26 12:23:43,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 22 transitions, 142 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:23:43,358 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-26 12:23:43,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-26 12:23:43,359 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-26 12:23:43,359 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-26 12:23:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.833333333333336) internal successors, (305), 6 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:23:43,361 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2023-08-26 12:23:43,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2023-08-26 12:23:43,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-08-26 12:23:43,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-08-26 12:23:43,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-08-26 12:23:43,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-08-26 12:23:43,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 15 remaining) [2023-08-26 12:23:43,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-08-26 12:23:43,362 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-08-26 12:23:43,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-08-26 12:23:43,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2023-08-26 12:23:43,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2023-08-26 12:23:43,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2023-08-26 12:23:43,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2023-08-26 12:23:43,363 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 15 remaining) [2023-08-26 12:23:43,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:23:43,364 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-26 12:23:43,368 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:23:43,368 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:23:43,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:23:43 BasicIcfg [2023-08-26 12:23:43,371 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:23:43,372 INFO L158 Benchmark]: Toolchain (without parser) took 6274.21ms. Allocated memory was 352.3MB in the beginning and 425.7MB in the end (delta: 73.4MB). Free memory was 326.0MB in the beginning and 393.3MB in the end (delta: -67.3MB). Peak memory consumption was 247.9MB. Max. memory is 16.0GB. [2023-08-26 12:23:43,372 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 352.3MB. Free memory was 329.1MB in the beginning and 329.0MB in the end (delta: 122.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:23:43,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 636.68ms. Allocated memory is still 352.3MB. Free memory was 326.0MB in the beginning and 298.3MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 12:23:43,372 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.54ms. Allocated memory is still 352.3MB. Free memory was 298.3MB in the beginning and 295.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 12:23:43,373 INFO L158 Benchmark]: Boogie Preprocessor took 34.05ms. Allocated memory is still 352.3MB. Free memory was 295.6MB in the beginning and 294.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:23:43,373 INFO L158 Benchmark]: RCFGBuilder took 454.58ms. Allocated memory is still 352.3MB. Free memory was 294.4MB in the beginning and 278.8MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 12:23:43,373 INFO L158 Benchmark]: TraceAbstraction took 5072.73ms. Allocated memory was 352.3MB in the beginning and 425.7MB in the end (delta: 73.4MB). Free memory was 278.2MB in the beginning and 393.3MB in the end (delta: -115.1MB). Peak memory consumption was 199.7MB. Max. memory is 16.0GB. [2023-08-26 12:23:43,374 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 352.3MB. Free memory was 329.1MB in the beginning and 329.0MB in the end (delta: 122.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 636.68ms. Allocated memory is still 352.3MB. Free memory was 326.0MB in the beginning and 298.3MB in the end (delta: 27.7MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 62.54ms. Allocated memory is still 352.3MB. Free memory was 298.3MB in the beginning and 295.6MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.05ms. Allocated memory is still 352.3MB. Free memory was 295.6MB in the beginning and 294.4MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 454.58ms. Allocated memory is still 352.3MB. Free memory was 294.4MB in the beginning and 278.8MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 5072.73ms. Allocated memory was 352.3MB in the beginning and 425.7MB in the end (delta: 73.4MB). Free memory was 278.2MB in the beginning and 393.3MB in the end (delta: -115.1MB). Peak memory consumption was 199.7MB. 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: 2.1s, 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: 5.0s, OverallIterations: 8, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 70 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 70 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 252 IncrementalHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 1 mSDtfsCounter, 252 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=5, InterpolantAutomatonStates: 38, 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, 1.0s InterpolantComputationTime, 96 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 672 SizeOfPredicates, 2 NumberOfNonLiveVariables, 247 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 175/218 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 12:23:43,390 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...