/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/28-race_reach_71-funloop_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:42:13,135 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:42:13,223 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 12:42:13,227 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:42:13,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:42:13,254 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:42:13,255 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:42:13,255 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:42:13,256 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:42:13,259 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:42:13,259 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:42:13,259 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:42:13,260 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:42:13,261 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:42:13,261 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:42:13,261 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:42:13,261 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:42:13,262 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:42:13,262 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:42:13,262 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:42:13,262 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:42:13,263 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:42:13,263 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:42:13,264 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:42:13,264 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:42:13,264 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:42:13,264 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:42:13,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:42:13,265 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:42:13,265 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:42:13,266 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:42:13,266 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:42:13,266 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:42:13,266 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:42:13,266 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:42:13,267 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:42:13,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:42:13,587 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:42:13,589 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:42:13,591 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:42:13,591 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:42:13,593 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-08-26 12:42:14,744 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:42:15,063 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:42:15,064 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_71-funloop_racing.i [2023-08-26 12:42:15,083 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9bfff19/76a50a2938e2490aa439eb2c93e9be70/FLAG161060f2a [2023-08-26 12:42:15,096 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9bfff19/76a50a2938e2490aa439eb2c93e9be70 [2023-08-26 12:42:15,099 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:42:15,100 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:42:15,101 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:42:15,101 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:42:15,103 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:42:15,104 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d87760e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15, skipping insertion in model container [2023-08-26 12:42:15,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,159 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:42:15,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:42:15,668 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:42:15,699 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:42:15,700 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:42:15,706 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-26 12:42:15,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:42:15,801 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:42:15,802 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15 WrapperNode [2023-08-26 12:42:15,802 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:42:15,803 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:42:15,803 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:42:15,804 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:42:15,810 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,839 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,887 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 259 [2023-08-26 12:42:15,888 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:42:15,888 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:42:15,888 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:42:15,888 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:42:15,897 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,917 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,917 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,925 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,933 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,934 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,938 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:42:15,939 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:42:15,939 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:42:15,939 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:42:15,940 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (1/1) ... [2023-08-26 12:42:15,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:42:15,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:42:15,970 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 12:42:15,997 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 12:42:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:42:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:42:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:42:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:42:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:42:16,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:42:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:42:16,008 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:42:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:42:16,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:42:16,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:42:16,009 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 12:42:16,186 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:42:16,188 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:42:16,558 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:42:16,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:42:16,565 INFO L302 CfgBuilder]: Removed 35 assume(true) statements. [2023-08-26 12:42:16,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:42:16 BoogieIcfgContainer [2023-08-26 12:42:16,568 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:42:16,569 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:42:16,570 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:42:16,572 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:42:16,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:42:15" (1/3) ... [2023-08-26 12:42:16,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4e65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:42:16, skipping insertion in model container [2023-08-26 12:42:16,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:42:15" (2/3) ... [2023-08-26 12:42:16,573 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a4e65f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:42:16, skipping insertion in model container [2023-08-26 12:42:16,573 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:42:16" (3/3) ... [2023-08-26 12:42:16,574 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_71-funloop_racing.i [2023-08-26 12:42:16,589 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:42:16,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2023-08-26 12:42:16,590 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:42:16,665 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:42:16,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 292 transitions, 592 flow [2023-08-26 12:42:16,832 INFO L124 PetriNetUnfolderBase]: 78/458 cut-off events. [2023-08-26 12:42:16,833 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:42:16,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 458 events. 78/458 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2327 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 254. Up to 8 conditions per place. [2023-08-26 12:42:16,842 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 292 transitions, 592 flow [2023-08-26 12:42:16,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 292 transitions, 592 flow [2023-08-26 12:42:16,859 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:42:16,868 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 292 transitions, 592 flow [2023-08-26 12:42:16,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 292 transitions, 592 flow [2023-08-26 12:42:16,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 292 transitions, 592 flow [2023-08-26 12:42:16,952 INFO L124 PetriNetUnfolderBase]: 78/458 cut-off events. [2023-08-26 12:42:16,953 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:42:16,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 458 events. 78/458 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2327 event pairs, 0 based on Foata normal form. 0/314 useless extension candidates. Maximal degree in co-relation 254. Up to 8 conditions per place. [2023-08-26 12:42:16,974 INFO L119 LiptonReduction]: Number of co-enabled transitions 28552 [2023-08-26 12:42:21,406 INFO L134 LiptonReduction]: Checked pairs total: 56362 [2023-08-26 12:42:21,406 INFO L136 LiptonReduction]: Total number of compositions: 274 [2023-08-26 12:42:21,420 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:42:21,426 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;@5ff8aa24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:42:21,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-26 12:42:21,428 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:42:21,428 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-26 12:42:21,428 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:42:21,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:21,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:42:21,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:42:21,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:21,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1149001, now seen corresponding path program 1 times [2023-08-26 12:42:21,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:21,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113002195] [2023-08-26 12:42:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:21,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:21,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:21,686 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 12:42:21,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113002195] [2023-08-26 12:42:21,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113002195] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:21,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:42:21,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:42:21,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435382295] [2023-08-26 12:42:21,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:21,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:42:21,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:21,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:42:21,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:42:21,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 566 [2023-08-26 12:42:21,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 133 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:21,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:21,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 566 [2023-08-26 12:42:21,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:22,067 INFO L124 PetriNetUnfolderBase]: 1102/2401 cut-off events. [2023-08-26 12:42:22,067 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:42:22,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4479 conditions, 2401 events. 1102/2401 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17269 event pairs, 940 based on Foata normal form. 184/1690 useless extension candidates. Maximal degree in co-relation 4352. Up to 2070 conditions per place. [2023-08-26 12:42:22,085 INFO L140 encePairwiseOnDemand]: 522/566 looper letters, 74 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2023-08-26 12:42:22,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 93 transitions, 346 flow [2023-08-26 12:42:22,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:42:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:42:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 832 transitions. [2023-08-26 12:42:22,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48998822143698467 [2023-08-26 12:42:22,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 832 transitions. [2023-08-26 12:42:22,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 832 transitions. [2023-08-26 12:42:22,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:22,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 832 transitions. [2023-08-26 12:42:22,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 566.0) internal successors, (2264), 4 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,127 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 566.0) internal successors, (2264), 4 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,129 INFO L175 Difference]: Start difference. First operand has 98 places, 133 transitions, 274 flow. Second operand 3 states and 832 transitions. [2023-08-26 12:42:22,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 93 transitions, 346 flow [2023-08-26 12:42:22,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 346 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:42:22,137 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 204 flow [2023-08-26 12:42:22,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=566, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2023-08-26 12:42:22,143 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, -7 predicate places. [2023-08-26 12:42:22,143 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 204 flow [2023-08-26 12:42:22,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.0) internal successors, (717), 3 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:22,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:42:22,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:42:22,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:42:22,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:22,147 INFO L85 PathProgramCache]: Analyzing trace with hash 35602774, now seen corresponding path program 1 times [2023-08-26 12:42:22,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:22,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763984044] [2023-08-26 12:42:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:22,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:22,204 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 12:42:22,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:22,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763984044] [2023-08-26 12:42:22,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763984044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:42:22,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893828841] [2023-08-26 12:42:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:22,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:42:22,208 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 12:42:22,285 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 12:42:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:22,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:42:22,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:42:22,385 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 12:42:22,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:42:22,408 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 12:42:22,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893828841] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:42:22,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:42:22,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-26 12:42:22,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893953223] [2023-08-26 12:42:22,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:42:22,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:42:22,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:22,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:42:22,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:42:22,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 566 [2023-08-26 12:42:22,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 204 flow. Second operand has 6 states, 6 states have (on average 239.16666666666666) internal successors, (1435), 6 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:22,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 566 [2023-08-26 12:42:22,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:22,782 INFO L124 PetriNetUnfolderBase]: 1102/2404 cut-off events. [2023-08-26 12:42:22,782 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:42:22,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4495 conditions, 2404 events. 1102/2404 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17247 event pairs, 940 based on Foata normal form. 0/1509 useless extension candidates. Maximal degree in co-relation 4483. Up to 2070 conditions per place. [2023-08-26 12:42:22,796 INFO L140 encePairwiseOnDemand]: 563/566 looper letters, 74 selfloop transitions, 5 changer transitions 0/96 dead transitions. [2023-08-26 12:42:22,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 96 transitions, 374 flow [2023-08-26 12:42:22,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:42:22,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:42:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1510 transitions. [2023-08-26 12:42:22,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444640753828033 [2023-08-26 12:42:22,801 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1510 transitions. [2023-08-26 12:42:22,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1510 transitions. [2023-08-26 12:42:22,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:22,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1510 transitions. [2023-08-26 12:42:22,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.66666666666666) internal successors, (1510), 6 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 566.0) internal successors, (3962), 7 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,812 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 566.0) internal successors, (3962), 7 states have internal predecessors, (3962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,812 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 204 flow. Second operand 6 states and 1510 transitions. [2023-08-26 12:42:22,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 96 transitions, 374 flow [2023-08-26 12:42:22,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 96 transitions, 370 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:42:22,816 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 236 flow [2023-08-26 12:42:22,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=566, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2023-08-26 12:42:22,817 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 0 predicate places. [2023-08-26 12:42:22,817 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 236 flow [2023-08-26 12:42:22,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.16666666666666) internal successors, (1435), 6 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:22,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:22,818 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 12:42:22,828 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 12:42:23,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:23,024 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:42:23,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash -230855862, now seen corresponding path program 2 times [2023-08-26 12:42:23,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:23,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162725281] [2023-08-26 12:42:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:23,161 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 12:42:23,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162725281] [2023-08-26 12:42:23,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162725281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:42:23,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025700288] [2023-08-26 12:42:23,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:42:23,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:23,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:42:23,164 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 12:42:23,167 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 12:42:23,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 12:42:23,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:42:23,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 12:42:23,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:42:23,273 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:42:23,285 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 12:42:23,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:42:23,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025700288] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:23,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:42:23,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 12:42:23,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939134191] [2023-08-26 12:42:23,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:23,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:42:23,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:23,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:42:23,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:42:23,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 566 [2023-08-26 12:42:23,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:23,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:23,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 566 [2023-08-26 12:42:23,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:23,641 INFO L124 PetriNetUnfolderBase]: 1176/2482 cut-off events. [2023-08-26 12:42:23,641 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 12:42:23,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4804 conditions, 2482 events. 1176/2482 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18005 event pairs, 0 based on Foata normal form. 0/1649 useless extension candidates. Maximal degree in co-relation 4770. Up to 2244 conditions per place. [2023-08-26 12:42:23,654 INFO L140 encePairwiseOnDemand]: 562/566 looper letters, 105 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2023-08-26 12:42:23,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 121 transitions, 500 flow [2023-08-26 12:42:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:42:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:42:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 693 transitions. [2023-08-26 12:42:23,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4081272084805654 [2023-08-26 12:42:23,657 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 693 transitions. [2023-08-26 12:42:23,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 693 transitions. [2023-08-26 12:42:23,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:23,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 693 transitions. [2023-08-26 12:42:23,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:23,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 566.0) internal successors, (2264), 4 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:23,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 566.0) internal successors, (2264), 4 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:23,663 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 236 flow. Second operand 3 states and 693 transitions. [2023-08-26 12:42:23,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 121 transitions, 500 flow [2023-08-26 12:42:23,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 121 transitions, 486 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 12:42:23,667 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 232 flow [2023-08-26 12:42:23,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=566, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2023-08-26 12:42:23,668 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 2 predicate places. [2023-08-26 12:42:23,668 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 232 flow [2023-08-26 12:42:23,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:23,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:23,669 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 12:42:23,679 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 12:42:23,874 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,SelfDestructingSolverStorable2 [2023-08-26 12:42:23,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:42:23,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:23,875 INFO L85 PathProgramCache]: Analyzing trace with hash -230855863, now seen corresponding path program 1 times [2023-08-26 12:42:23,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:23,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039898813] [2023-08-26 12:42:23,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:23,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:23,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:23,920 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 12:42:23,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:23,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039898813] [2023-08-26 12:42:23,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039898813] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:23,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:42:23,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:42:23,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011364715] [2023-08-26 12:42:23,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:23,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:42:23,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:42:23,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:42:23,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 566 [2023-08-26 12:42:23,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:23,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:23,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 566 [2023-08-26 12:42:23,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:24,228 INFO L124 PetriNetUnfolderBase]: 1269/2556 cut-off events. [2023-08-26 12:42:24,229 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-26 12:42:24,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5047 conditions, 2556 events. 1269/2556 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17319 event pairs, 1080 based on Foata normal form. 0/1673 useless extension candidates. Maximal degree in co-relation 5018. Up to 2307 conditions per place. [2023-08-26 12:42:24,247 INFO L140 encePairwiseOnDemand]: 562/566 looper letters, 104 selfloop transitions, 2 changer transitions 1/119 dead transitions. [2023-08-26 12:42:24,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 119 transitions, 492 flow [2023-08-26 12:42:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:42:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:42:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 708 transitions. [2023-08-26 12:42:24,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169611307420495 [2023-08-26 12:42:24,250 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 708 transitions. [2023-08-26 12:42:24,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 708 transitions. [2023-08-26 12:42:24,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:24,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 708 transitions. [2023-08-26 12:42:24,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 236.0) internal successors, (708), 3 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 566.0) internal successors, (2264), 4 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 566.0) internal successors, (2264), 4 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,256 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 232 flow. Second operand 3 states and 708 transitions. [2023-08-26 12:42:24,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 119 transitions, 492 flow [2023-08-26 12:42:24,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 119 transitions, 488 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:42:24,259 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 228 flow [2023-08-26 12:42:24,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=566, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=228, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2023-08-26 12:42:24,260 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 0 predicate places. [2023-08-26 12:42:24,260 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 228 flow [2023-08-26 12:42:24,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:24,261 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-08-26 12:42:24,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:42:24,262 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:42:24,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:24,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1183543849, now seen corresponding path program 1 times [2023-08-26 12:42:24,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:24,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741492090] [2023-08-26 12:42:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:24,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 12:42:24,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:24,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741492090] [2023-08-26 12:42:24,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741492090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:42:24,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123184073] [2023-08-26 12:42:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:24,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:24,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:42:24,350 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 12:42:24,380 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 12:42:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:24,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:42:24,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:42:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 12:42:24,444 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:42:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 12:42:24,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123184073] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:42:24,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:42:24,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-26 12:42:24,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878598140] [2023-08-26 12:42:24,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:42:24,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 12:42:24,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:24,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 12:42:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-26 12:42:24,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 566 [2023-08-26 12:42:24,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 228 flow. Second operand has 12 states, 12 states have (on average 239.33333333333334) internal successors, (2872), 12 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:24,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 566 [2023-08-26 12:42:24,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:24,836 INFO L124 PetriNetUnfolderBase]: 1052/2230 cut-off events. [2023-08-26 12:42:24,836 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2023-08-26 12:42:24,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4306 conditions, 2230 events. 1052/2230 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15765 event pairs, 900 based on Foata normal form. 6/1502 useless extension candidates. Maximal degree in co-relation 4253. Up to 1943 conditions per place. [2023-08-26 12:42:24,850 INFO L140 encePairwiseOnDemand]: 563/566 looper letters, 72 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2023-08-26 12:42:24,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 100 transitions, 430 flow [2023-08-26 12:42:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:42:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:42:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2945 transitions. [2023-08-26 12:42:24,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43359835100117783 [2023-08-26 12:42:24,858 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2945 transitions. [2023-08-26 12:42:24,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2945 transitions. [2023-08-26 12:42:24,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:24,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2945 transitions. [2023-08-26 12:42:24,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 245.41666666666666) internal successors, (2945), 12 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 566.0) internal successors, (7358), 13 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,876 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 566.0) internal successors, (7358), 13 states have internal predecessors, (7358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,876 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 228 flow. Second operand 12 states and 2945 transitions. [2023-08-26 12:42:24,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 100 transitions, 430 flow [2023-08-26 12:42:24,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 100 transitions, 426 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:42:24,880 INFO L231 Difference]: Finished difference. Result has 113 places, 100 transitions, 308 flow [2023-08-26 12:42:24,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=566, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=308, PETRI_PLACES=113, PETRI_TRANSITIONS=100} [2023-08-26 12:42:24,880 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 15 predicate places. [2023-08-26 12:42:24,881 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 100 transitions, 308 flow [2023-08-26 12:42:24,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 239.33333333333334) internal successors, (2872), 12 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:24,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:24,882 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-26 12:42:24,891 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 12:42:25,087 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 12:42:25,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:42:25,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash -792708777, now seen corresponding path program 2 times [2023-08-26 12:42:25,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:25,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868990062] [2023-08-26 12:42:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:25,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:42:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868990062] [2023-08-26 12:42:25,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868990062] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:42:25,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333742768] [2023-08-26 12:42:25,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:42:25,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:25,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:42:25,227 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:42:25,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 12:42:25,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 12:42:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:42:25,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 12:42:25,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:42:25,334 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:42:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:42:25,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:42:25,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333742768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:25,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:42:25,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-26 12:42:25,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78745075] [2023-08-26 12:42:25,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:25,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:42:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:25,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:42:25,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:42:25,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 566 [2023-08-26 12:42:25,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 100 transitions, 308 flow. Second operand has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:25,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:25,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 566 [2023-08-26 12:42:25,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:25,737 INFO L124 PetriNetUnfolderBase]: 1107/2348 cut-off events. [2023-08-26 12:42:25,737 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-26 12:42:25,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4619 conditions, 2348 events. 1107/2348 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 16781 event pairs, 0 based on Foata normal form. 0/1633 useless extension candidates. Maximal degree in co-relation 4542. Up to 2019 conditions per place. [2023-08-26 12:42:25,750 INFO L140 encePairwiseOnDemand]: 562/566 looper letters, 129 selfloop transitions, 3 changer transitions 0/146 dead transitions. [2023-08-26 12:42:25,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 146 transitions, 662 flow [2023-08-26 12:42:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:42:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:42:25,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 907 transitions. [2023-08-26 12:42:25,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006183745583039 [2023-08-26 12:42:25,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 907 transitions. [2023-08-26 12:42:25,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 907 transitions. [2023-08-26 12:42:25,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:25,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 907 transitions. [2023-08-26 12:42:25,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 226.75) internal successors, (907), 4 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:25,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 566.0) internal successors, (2830), 5 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:25,759 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 566.0) internal successors, (2830), 5 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:25,759 INFO L175 Difference]: Start difference. First operand has 113 places, 100 transitions, 308 flow. Second operand 4 states and 907 transitions. [2023-08-26 12:42:25,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 146 transitions, 662 flow [2023-08-26 12:42:25,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 146 transitions, 614 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 12:42:25,763 INFO L231 Difference]: Finished difference. Result has 110 places, 99 transitions, 262 flow [2023-08-26 12:42:25,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=566, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2023-08-26 12:42:25,764 INFO L281 CegarLoopForPetriNet]: 98 programPoint places, 12 predicate places. [2023-08-26 12:42:25,764 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 262 flow [2023-08-26 12:42:25,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:25,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:25,765 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-26 12:42:25,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 12:42:25,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:25,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:42:25,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:25,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1195832484, now seen corresponding path program 1 times [2023-08-26 12:42:25,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:25,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919465566] [2023-08-26 12:42:25,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:25,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:26,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:42:26,006 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:42:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:42:26,045 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:42:26,045 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:42:26,047 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-08-26 12:42:26,049 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-08-26 12:42:26,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-08-26 12:42:26,050 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-08-26 12:42:26,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-08-26 12:42:26,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-08-26 12:42:26,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONASSERT (27 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-08-26 12:42:26,053 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-08-26 12:42:26,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-08-26 12:42:26,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-08-26 12:42:26,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (22 of 49 remaining) [2023-08-26 12:42:26,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 49 remaining) [2023-08-26 12:42:26,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-08-26 12:42:26,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-08-26 12:42:26,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 49 remaining) [2023-08-26 12:42:26,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-08-26 12:42:26,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-08-26 12:42:26,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-08-26 12:42:26,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-08-26 12:42:26,055 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (11 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-08-26 12:42:26,056 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 49 remaining) [2023-08-26 12:42:26,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 49 remaining) [2023-08-26 12:42:26,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-08-26 12:42:26,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (0 of 49 remaining) [2023-08-26 12:42:26,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:42:26,057 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-26 12:42:26,060 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:42:26,060 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:42:26,109 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 12:42:26,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 377 transitions, 772 flow [2023-08-26 12:42:26,198 INFO L124 PetriNetUnfolderBase]: 126/736 cut-off events. [2023-08-26 12:42:26,198 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:42:26,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 736 events. 126/736 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4257 event pairs, 0 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 460. Up to 12 conditions per place. [2023-08-26 12:42:26,206 INFO L82 GeneralOperation]: Start removeDead. Operand has 318 places, 377 transitions, 772 flow [2023-08-26 12:42:26,222 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 318 places, 377 transitions, 772 flow [2023-08-26 12:42:26,222 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:42:26,222 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 318 places, 377 transitions, 772 flow [2023-08-26 12:42:26,223 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 318 places, 377 transitions, 772 flow [2023-08-26 12:42:26,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 318 places, 377 transitions, 772 flow [2023-08-26 12:42:26,297 INFO L124 PetriNetUnfolderBase]: 126/736 cut-off events. [2023-08-26 12:42:26,298 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:42:26,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 736 events. 126/736 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4257 event pairs, 0 based on Foata normal form. 0/504 useless extension candidates. Maximal degree in co-relation 460. Up to 12 conditions per place. [2023-08-26 12:42:26,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 72708 [2023-08-26 12:42:31,254 INFO L134 LiptonReduction]: Checked pairs total: 147660 [2023-08-26 12:42:31,254 INFO L136 LiptonReduction]: Total number of compositions: 346 [2023-08-26 12:42:31,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:42:31,256 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;@5ff8aa24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:42:31,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-08-26 12:42:31,258 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:42:31,258 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-08-26 12:42:31,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:42:31,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:31,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:42:31,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:42:31,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:31,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1955713, now seen corresponding path program 1 times [2023-08-26 12:42:31,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:31,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758098500] [2023-08-26 12:42:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:31,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:31,275 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 12:42:31,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:31,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758098500] [2023-08-26 12:42:31,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758098500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:31,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:42:31,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:42:31,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780276123] [2023-08-26 12:42:31,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:31,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:42:31,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:42:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:42:31,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 723 [2023-08-26 12:42:31,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 178 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:31,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:31,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 723 [2023-08-26 12:42:31,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:36,783 INFO L124 PetriNetUnfolderBase]: 50296/80331 cut-off events. [2023-08-26 12:42:36,783 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-26 12:42:36,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152629 conditions, 80331 events. 50296/80331 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 2994. Compared 697371 event pairs, 44972 based on Foata normal form. 6362/59697 useless extension candidates. Maximal degree in co-relation 61748. Up to 72159 conditions per place. [2023-08-26 12:42:37,216 INFO L140 encePairwiseOnDemand]: 666/723 looper letters, 99 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2023-08-26 12:42:37,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 125 transitions, 470 flow [2023-08-26 12:42:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:42:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:42:37,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1077 transitions. [2023-08-26 12:42:37,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49654218533886585 [2023-08-26 12:42:37,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1077 transitions. [2023-08-26 12:42:37,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1077 transitions. [2023-08-26 12:42:37,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:37,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1077 transitions. [2023-08-26 12:42:37,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:37,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:37,232 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:37,232 INFO L175 Difference]: Start difference. First operand has 131 places, 178 transitions, 374 flow. Second operand 3 states and 1077 transitions. [2023-08-26 12:42:37,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 125 transitions, 470 flow [2023-08-26 12:42:37,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 125 transitions, 470 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:42:37,235 INFO L231 Difference]: Finished difference. Result has 122 places, 125 transitions, 278 flow [2023-08-26 12:42:37,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=122, PETRI_TRANSITIONS=125} [2023-08-26 12:42:37,237 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -9 predicate places. [2023-08-26 12:42:37,237 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 125 transitions, 278 flow [2023-08-26 12:42:37,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 308.0) internal successors, (924), 3 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:37,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:37,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:42:37,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:42:37,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:42:37,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:37,239 INFO L85 PathProgramCache]: Analyzing trace with hash 60624763, now seen corresponding path program 1 times [2023-08-26 12:42:37,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:37,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984744978] [2023-08-26 12:42:37,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:37,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:37,267 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 12:42:37,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984744978] [2023-08-26 12:42:37,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984744978] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:42:37,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636521183] [2023-08-26 12:42:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:37,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:37,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:42:37,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:42:37,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 12:42:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:37,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:42:37,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:42:37,354 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 12:42:37,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:42:37,366 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 12:42:37,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636521183] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:42:37,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:42:37,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 12:42:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74572730] [2023-08-26 12:42:37,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:42:37,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:42:37,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:37,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:42:37,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:42:37,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 723 [2023-08-26 12:42:37,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 125 transitions, 278 flow. Second operand has 7 states, 7 states have (on average 308.2857142857143) internal successors, (2158), 7 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:37,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:37,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 723 [2023-08-26 12:42:37,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:42,428 INFO L124 PetriNetUnfolderBase]: 50296/80334 cut-off events. [2023-08-26 12:42:42,428 INFO L125 PetriNetUnfolderBase]: For 180/180 co-relation queries the response was YES. [2023-08-26 12:42:42,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152645 conditions, 80334 events. 50296/80334 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 2994. Compared 697502 event pairs, 44972 based on Foata normal form. 0/53338 useless extension candidates. Maximal degree in co-relation 152632. Up to 72159 conditions per place. [2023-08-26 12:42:42,855 INFO L140 encePairwiseOnDemand]: 720/723 looper letters, 99 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2023-08-26 12:42:42,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 128 transitions, 498 flow [2023-08-26 12:42:42,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:42:42,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:42:42,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1949 transitions. [2023-08-26 12:42:42,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4492853849700323 [2023-08-26 12:42:42,862 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1949 transitions. [2023-08-26 12:42:42,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1949 transitions. [2023-08-26 12:42:42,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:42,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1949 transitions. [2023-08-26 12:42:42,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 324.8333333333333) internal successors, (1949), 6 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:42,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 723.0) internal successors, (5061), 7 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:42,874 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 723.0) internal successors, (5061), 7 states have internal predecessors, (5061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:42,874 INFO L175 Difference]: Start difference. First operand has 122 places, 125 transitions, 278 flow. Second operand 6 states and 1949 transitions. [2023-08-26 12:42:42,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 128 transitions, 498 flow [2023-08-26 12:42:42,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 128 transitions, 494 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:42:42,877 INFO L231 Difference]: Finished difference. Result has 129 places, 128 transitions, 310 flow [2023-08-26 12:42:42,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=129, PETRI_TRANSITIONS=128} [2023-08-26 12:42:42,880 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -2 predicate places. [2023-08-26 12:42:42,880 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 128 transitions, 310 flow [2023-08-26 12:42:42,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 308.2857142857143) internal successors, (2158), 7 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:42,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:42,893 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 12:42:42,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 12:42:43,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:43,098 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:42:43,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:43,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2111240703, now seen corresponding path program 2 times [2023-08-26 12:42:43,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:43,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510292247] [2023-08-26 12:42:43,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:43,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:43,130 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 12:42:43,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:43,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510292247] [2023-08-26 12:42:43,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510292247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:43,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:42:43,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:42:43,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817476790] [2023-08-26 12:42:43,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:43,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:42:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:43,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:42:43,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:42:43,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 260 out of 723 [2023-08-26 12:42:43,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 128 transitions, 310 flow. Second operand has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:43,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:43,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 260 of 723 [2023-08-26 12:42:43,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:48,729 INFO L124 PetriNetUnfolderBase]: 60440/92366 cut-off events. [2023-08-26 12:42:48,729 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-08-26 12:42:48,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179795 conditions, 92366 events. 60440/92366 cut-off events. For 198/198 co-relation queries the response was YES. Maximal size of possible extension queue 3234. Compared 758425 event pairs, 53524 based on Foata normal form. 0/58980 useless extension candidates. Maximal degree in co-relation 179760. Up to 85354 conditions per place. [2023-08-26 12:42:49,168 INFO L140 encePairwiseOnDemand]: 719/723 looper letters, 155 selfloop transitions, 2 changer transitions 0/175 dead transitions. [2023-08-26 12:42:49,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 175 transitions, 718 flow [2023-08-26 12:42:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:42:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:42:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 935 transitions. [2023-08-26 12:42:49,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4310742277547257 [2023-08-26 12:42:49,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 935 transitions. [2023-08-26 12:42:49,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 935 transitions. [2023-08-26 12:42:49,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:49,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 935 transitions. [2023-08-26 12:42:49,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:49,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:49,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:49,186 INFO L175 Difference]: Start difference. First operand has 129 places, 128 transitions, 310 flow. Second operand 3 states and 935 transitions. [2023-08-26 12:42:49,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 175 transitions, 718 flow [2023-08-26 12:42:49,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 175 transitions, 704 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 12:42:49,189 INFO L231 Difference]: Finished difference. Result has 128 places, 126 transitions, 296 flow [2023-08-26 12:42:49,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=128, PETRI_TRANSITIONS=126} [2023-08-26 12:42:49,191 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, -3 predicate places. [2023-08-26 12:42:49,191 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 126 transitions, 296 flow [2023-08-26 12:42:49,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:49,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:49,191 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 12:42:49,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:42:49,192 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:42:49,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:49,192 INFO L85 PathProgramCache]: Analyzing trace with hash -2111240702, now seen corresponding path program 1 times [2023-08-26 12:42:49,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:49,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654661049] [2023-08-26 12:42:49,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:49,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:49,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:49,242 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 12:42:49,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:49,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654661049] [2023-08-26 12:42:49,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654661049] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:42:49,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355779584] [2023-08-26 12:42:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:49,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:49,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:42:49,244 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:42:49,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 12:42:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:49,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:42:49,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:42:49,340 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 12:42:49,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:42:49,384 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 12:42:49,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355779584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:42:49,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:42:49,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 12:42:49,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385509120] [2023-08-26 12:42:49,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:42:49,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 12:42:49,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:49,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 12:42:49,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 12:42:49,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 723 [2023-08-26 12:42:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 126 transitions, 296 flow. Second operand has 13 states, 13 states have (on average 308.15384615384613) internal successors, (4006), 13 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:49,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:49,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 723 [2023-08-26 12:42:49,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:42:54,680 INFO L124 PetriNetUnfolderBase]: 48212/76987 cut-off events. [2023-08-26 12:42:54,680 INFO L125 PetriNetUnfolderBase]: For 714/714 co-relation queries the response was YES. [2023-08-26 12:42:54,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146818 conditions, 76987 events. 48212/76987 cut-off events. For 714/714 co-relation queries the response was YES. Maximal size of possible extension queue 2885. Compared 665631 event pairs, 43064 based on Foata normal form. 6/52284 useless extension candidates. Maximal degree in co-relation 146765. Up to 69125 conditions per place. [2023-08-26 12:42:55,056 INFO L140 encePairwiseOnDemand]: 720/723 looper letters, 97 selfloop transitions, 11 changer transitions 0/132 dead transitions. [2023-08-26 12:42:55,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 132 transitions, 548 flow [2023-08-26 12:42:55,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:42:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:42:55,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3798 transitions. [2023-08-26 12:42:55,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43775933609958506 [2023-08-26 12:42:55,069 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3798 transitions. [2023-08-26 12:42:55,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3798 transitions. [2023-08-26 12:42:55,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:42:55,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3798 transitions. [2023-08-26 12:42:55,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 316.5) internal successors, (3798), 12 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:55,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:55,093 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 723.0) internal successors, (9399), 13 states have internal predecessors, (9399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:55,093 INFO L175 Difference]: Start difference. First operand has 128 places, 126 transitions, 296 flow. Second operand 12 states and 3798 transitions. [2023-08-26 12:42:55,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 132 transitions, 548 flow [2023-08-26 12:42:55,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 132 transitions, 544 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:42:55,102 INFO L231 Difference]: Finished difference. Result has 143 places, 132 transitions, 376 flow [2023-08-26 12:42:55,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=376, PETRI_PLACES=143, PETRI_TRANSITIONS=132} [2023-08-26 12:42:55,103 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 12 predicate places. [2023-08-26 12:42:55,103 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 132 transitions, 376 flow [2023-08-26 12:42:55,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 308.15384615384613) internal successors, (4006), 13 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:55,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:42:55,105 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-26 12:42:55,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-26 12:42:55,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:42:55,309 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:42:55,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:42:55,310 INFO L85 PathProgramCache]: Analyzing trace with hash -74665022, now seen corresponding path program 2 times [2023-08-26 12:42:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:42:55,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201563243] [2023-08-26 12:42:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:42:55,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:42:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:42:55,418 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 12:42:55,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:42:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201563243] [2023-08-26 12:42:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201563243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:42:55,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:42:55,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:42:55,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301655948] [2023-08-26 12:42:55,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:42:55,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:42:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:42:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:42:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:42:55,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 723 [2023-08-26 12:42:55,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 132 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:42:55,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:42:55,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 723 [2023-08-26 12:42:55,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:43:00,776 INFO L124 PetriNetUnfolderBase]: 50880/80611 cut-off events. [2023-08-26 12:43:00,776 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2023-08-26 12:43:01,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154679 conditions, 80611 events. 50880/80611 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 2992. Compared 693318 event pairs, 22323 based on Foata normal form. 0/54966 useless extension candidates. Maximal degree in co-relation 154602. Up to 73816 conditions per place. [2023-08-26 12:43:01,442 INFO L140 encePairwiseOnDemand]: 719/723 looper letters, 133 selfloop transitions, 2 changer transitions 0/157 dead transitions. [2023-08-26 12:43:01,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 157 transitions, 696 flow [2023-08-26 12:43:01,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:43:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:43:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 892 transitions. [2023-08-26 12:43:01,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41124942369755646 [2023-08-26 12:43:01,445 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 892 transitions. [2023-08-26 12:43:01,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 892 transitions. [2023-08-26 12:43:01,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:43:01,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 892 transitions. [2023-08-26 12:43:01,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.3333333333333) internal successors, (892), 3 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:01,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:01,450 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 723.0) internal successors, (2892), 4 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:01,450 INFO L175 Difference]: Start difference. First operand has 143 places, 132 transitions, 376 flow. Second operand 3 states and 892 transitions. [2023-08-26 12:43:01,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 157 transitions, 696 flow [2023-08-26 12:43:01,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 157 transitions, 648 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 12:43:01,454 INFO L231 Difference]: Finished difference. Result has 141 places, 133 transitions, 342 flow [2023-08-26 12:43:01,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=342, PETRI_PLACES=141, PETRI_TRANSITIONS=133} [2023-08-26 12:43:01,455 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 10 predicate places. [2023-08-26 12:43:01,455 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 133 transitions, 342 flow [2023-08-26 12:43:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 256.3333333333333) internal successors, (769), 3 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:01,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:43:01,456 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:43:01,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:43:01,456 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:43:01,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:43:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1030972461, now seen corresponding path program 1 times [2023-08-26 12:43:01,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:43:01,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117864044] [2023-08-26 12:43:01,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:43:01,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:43:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:43:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:43:01,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:43:01,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117864044] [2023-08-26 12:43:01,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117864044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:43:01,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005577694] [2023-08-26 12:43:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:43:01,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:43:01,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:43:01,582 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:43:01,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 12:43:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:43:01,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:43:01,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:43:01,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:43:01,720 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:43:01,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:43:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:43:01,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005577694] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:43:01,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:43:01,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 12:43:01,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094152180] [2023-08-26 12:43:01,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:43:01,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:43:01,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:43:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:43:01,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:43:01,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 723 [2023-08-26 12:43:01,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 133 transitions, 342 flow. Second operand has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:01,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:43:01,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 723 [2023-08-26 12:43:01,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:43:06,820 INFO L124 PetriNetUnfolderBase]: 47907/75198 cut-off events. [2023-08-26 12:43:06,820 INFO L125 PetriNetUnfolderBase]: For 1201/1201 co-relation queries the response was YES. [2023-08-26 12:43:07,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147864 conditions, 75198 events. 47907/75198 cut-off events. For 1201/1201 co-relation queries the response was YES. Maximal size of possible extension queue 2743. Compared 637741 event pairs, 254 based on Foata normal form. 23/51935 useless extension candidates. Maximal degree in co-relation 147810. Up to 66249 conditions per place. [2023-08-26 12:43:07,268 INFO L140 encePairwiseOnDemand]: 719/723 looper letters, 221 selfloop transitions, 4 changer transitions 0/247 dead transitions. [2023-08-26 12:43:07,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 247 transitions, 1018 flow [2023-08-26 12:43:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:43:07,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:43:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1493 transitions. [2023-08-26 12:43:07,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41300138312586443 [2023-08-26 12:43:07,272 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1493 transitions. [2023-08-26 12:43:07,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1493 transitions. [2023-08-26 12:43:07,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:43:07,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1493 transitions. [2023-08-26 12:43:07,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 298.6) internal successors, (1493), 5 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:07,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:07,280 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:07,281 INFO L175 Difference]: Start difference. First operand has 141 places, 133 transitions, 342 flow. Second operand 5 states and 1493 transitions. [2023-08-26 12:43:07,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 247 transitions, 1018 flow [2023-08-26 12:43:07,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 247 transitions, 1016 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:43:07,290 INFO L231 Difference]: Finished difference. Result has 143 places, 132 transitions, 344 flow [2023-08-26 12:43:07,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=344, PETRI_PLACES=143, PETRI_TRANSITIONS=132} [2023-08-26 12:43:07,291 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 12 predicate places. [2023-08-26 12:43:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 132 transitions, 344 flow [2023-08-26 12:43:07,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 257.0) internal successors, (1799), 7 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:07,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:43:07,292 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:43:07,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 12:43:07,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:43:07,500 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:43:07,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:43:07,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1913747053, now seen corresponding path program 1 times [2023-08-26 12:43:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:43:07,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484853421] [2023-08-26 12:43:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:43:07,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:43:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:43:07,901 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 12:43:07,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:43:07,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484853421] [2023-08-26 12:43:07,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484853421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:43:07,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:43:07,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:43:07,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512284763] [2023-08-26 12:43:07,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:43:07,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:43:07,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:43:07,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:43:07,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:43:07,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 723 [2023-08-26 12:43:07,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 132 transitions, 344 flow. Second operand has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:07,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:43:07,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 723 [2023-08-26 12:43:07,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:43:20,210 INFO L124 PetriNetUnfolderBase]: 117228/175428 cut-off events. [2023-08-26 12:43:20,211 INFO L125 PetriNetUnfolderBase]: For 8134/8134 co-relation queries the response was YES. [2023-08-26 12:43:20,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350421 conditions, 175428 events. 117228/175428 cut-off events. For 8134/8134 co-relation queries the response was YES. Maximal size of possible extension queue 4572. Compared 1464406 event pairs, 54927 based on Foata normal form. 0/112888 useless extension candidates. Maximal degree in co-relation 350367. Up to 87784 conditions per place. [2023-08-26 12:43:21,210 INFO L140 encePairwiseOnDemand]: 707/723 looper letters, 500 selfloop transitions, 14 changer transitions 0/525 dead transitions. [2023-08-26 12:43:21,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 525 transitions, 2221 flow [2023-08-26 12:43:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 12:43:21,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 12:43:21,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2472 transitions. [2023-08-26 12:43:21,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34190871369294606 [2023-08-26 12:43:21,217 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2472 transitions. [2023-08-26 12:43:21,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2472 transitions. [2023-08-26 12:43:21,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:43:21,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2472 transitions. [2023-08-26 12:43:21,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 247.2) internal successors, (2472), 10 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:21,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 723.0) internal successors, (7953), 11 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:21,232 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 723.0) internal successors, (7953), 11 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:21,232 INFO L175 Difference]: Start difference. First operand has 143 places, 132 transitions, 344 flow. Second operand 10 states and 2472 transitions. [2023-08-26 12:43:21,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 525 transitions, 2221 flow [2023-08-26 12:43:21,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 525 transitions, 2190 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 12:43:21,242 INFO L231 Difference]: Finished difference. Result has 147 places, 137 transitions, 408 flow [2023-08-26 12:43:21,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=408, PETRI_PLACES=147, PETRI_TRANSITIONS=137} [2023-08-26 12:43:21,243 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 16 predicate places. [2023-08-26 12:43:21,243 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 137 transitions, 408 flow [2023-08-26 12:43:21,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 195.28571428571428) internal successors, (1367), 7 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:21,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:43:21,243 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:43:21,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:43:21,243 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:43:21,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:43:21,244 INFO L85 PathProgramCache]: Analyzing trace with hash -803387370, now seen corresponding path program 1 times [2023-08-26 12:43:21,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:43:21,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837724655] [2023-08-26 12:43:21,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:43:21,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:43:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:43:21,423 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 12:43:21,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:43:21,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837724655] [2023-08-26 12:43:21,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837724655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:43:21,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:43:21,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:43:21,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989221739] [2023-08-26 12:43:21,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:43:21,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:43:21,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:43:21,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:43:21,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:43:21,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 210 out of 723 [2023-08-26 12:43:21,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 137 transitions, 408 flow. Second operand has 6 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:21,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:43:21,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 210 of 723 [2023-08-26 12:43:21,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:43:31,973 INFO L124 PetriNetUnfolderBase]: 93096/141611 cut-off events. [2023-08-26 12:43:31,973 INFO L125 PetriNetUnfolderBase]: For 20543/20543 co-relation queries the response was YES. [2023-08-26 12:43:32,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303445 conditions, 141611 events. 93096/141611 cut-off events. For 20543/20543 co-relation queries the response was YES. Maximal size of possible extension queue 3641. Compared 1217504 event pairs, 3224 based on Foata normal form. 0/105085 useless extension candidates. Maximal degree in co-relation 303387. Up to 126167 conditions per place. [2023-08-26 12:43:33,035 INFO L140 encePairwiseOnDemand]: 709/723 looper letters, 269 selfloop transitions, 15 changer transitions 0/295 dead transitions. [2023-08-26 12:43:33,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 295 transitions, 1346 flow [2023-08-26 12:43:33,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:43:33,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:43:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1320 transitions. [2023-08-26 12:43:33,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3651452282157676 [2023-08-26 12:43:33,038 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1320 transitions. [2023-08-26 12:43:33,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1320 transitions. [2023-08-26 12:43:33,039 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:43:33,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1320 transitions. [2023-08-26 12:43:33,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 264.0) internal successors, (1320), 5 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:33,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:33,045 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 723.0) internal successors, (4338), 6 states have internal predecessors, (4338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:33,045 INFO L175 Difference]: Start difference. First operand has 147 places, 137 transitions, 408 flow. Second operand 5 states and 1320 transitions. [2023-08-26 12:43:33,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 295 transitions, 1346 flow [2023-08-26 12:43:35,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 295 transitions, 1345 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:43:35,141 INFO L231 Difference]: Finished difference. Result has 153 places, 146 transitions, 519 flow [2023-08-26 12:43:35,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=519, PETRI_PLACES=153, PETRI_TRANSITIONS=146} [2023-08-26 12:43:35,141 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 22 predicate places. [2023-08-26 12:43:35,141 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 146 transitions, 519 flow [2023-08-26 12:43:35,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 211.66666666666666) internal successors, (1270), 6 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:35,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:43:35,142 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:43:35,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:43:35,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:43:35,142 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:43:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash -803386906, now seen corresponding path program 1 times [2023-08-26 12:43:35,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:43:35,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261966853] [2023-08-26 12:43:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:43:35,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:43:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:43:35,413 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 12:43:35,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:43:35,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261966853] [2023-08-26 12:43:35,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261966853] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:43:35,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:43:35,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:43:35,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806281643] [2023-08-26 12:43:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:43:35,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:43:35,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:43:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:43:35,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:43:35,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 723 [2023-08-26 12:43:35,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 146 transitions, 519 flow. Second operand has 6 states, 6 states have (on average 234.66666666666666) internal successors, (1408), 6 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:35,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:43:35,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 723 [2023-08-26 12:43:35,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:43:52,448 INFO L124 PetriNetUnfolderBase]: 134620/208369 cut-off events. [2023-08-26 12:43:52,448 INFO L125 PetriNetUnfolderBase]: For 79534/79646 co-relation queries the response was YES. [2023-08-26 12:43:53,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481522 conditions, 208369 events. 134620/208369 cut-off events. For 79534/79646 co-relation queries the response was YES. Maximal size of possible extension queue 6344. Compared 1899946 event pairs, 22637 based on Foata normal form. 112/159739 useless extension candidates. Maximal degree in co-relation 481460. Up to 110718 conditions per place. [2023-08-26 12:43:53,869 INFO L140 encePairwiseOnDemand]: 708/723 looper letters, 381 selfloop transitions, 48 changer transitions 0/447 dead transitions. [2023-08-26 12:43:53,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 447 transitions, 2328 flow [2023-08-26 12:43:53,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 12:43:53,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 12:43:53,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2001 transitions. [2023-08-26 12:43:53,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953764078245406 [2023-08-26 12:43:53,873 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2001 transitions. [2023-08-26 12:43:53,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2001 transitions. [2023-08-26 12:43:53,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:43:53,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2001 transitions. [2023-08-26 12:43:53,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 285.85714285714283) internal successors, (2001), 7 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:53,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:53,883 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 723.0) internal successors, (5784), 8 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:43:53,883 INFO L175 Difference]: Start difference. First operand has 153 places, 146 transitions, 519 flow. Second operand 7 states and 2001 transitions. [2023-08-26 12:43:53,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 447 transitions, 2328 flow [2023-08-26 12:44:03,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 447 transitions, 2328 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:44:03,154 INFO L231 Difference]: Finished difference. Result has 164 places, 192 transitions, 972 flow [2023-08-26 12:44:03,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=723, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=972, PETRI_PLACES=164, PETRI_TRANSITIONS=192} [2023-08-26 12:44:03,154 INFO L281 CegarLoopForPetriNet]: 131 programPoint places, 33 predicate places. [2023-08-26 12:44:03,155 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 192 transitions, 972 flow [2023-08-26 12:44:03,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 234.66666666666666) internal successors, (1408), 6 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:44:03,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:44:03,155 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 12:44:03,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:44:03,155 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:44:03,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:44:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2053445986, now seen corresponding path program 1 times [2023-08-26 12:44:03,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:44:03,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578899129] [2023-08-26 12:44:03,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:44:03,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:44:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:44:03,171 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:44:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:44:03,186 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:44:03,186 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:44:03,186 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (59 of 60 remaining) [2023-08-26 12:44:03,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 60 remaining) [2023-08-26 12:44:03,186 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 60 remaining) [2023-08-26 12:44:03,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 60 remaining) [2023-08-26 12:44:03,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 60 remaining) [2023-08-26 12:44:03,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 60 remaining) [2023-08-26 12:44:03,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 60 remaining) [2023-08-26 12:44:03,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 60 remaining) [2023-08-26 12:44:03,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 60 remaining) [2023-08-26 12:44:03,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 60 remaining) [2023-08-26 12:44:03,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 60 remaining) [2023-08-26 12:44:03,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 60 remaining) [2023-08-26 12:44:03,194 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONASSERT (38 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (33 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 60 remaining) [2023-08-26 12:44:03,195 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (22 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 60 remaining) [2023-08-26 12:44:03,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (11 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 60 remaining) [2023-08-26 12:44:03,197 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 60 remaining) [2023-08-26 12:44:03,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 60 remaining) [2023-08-26 12:44:03,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 60 remaining) [2023-08-26 12:44:03,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 60 remaining) [2023-08-26 12:44:03,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 60 remaining) [2023-08-26 12:44:03,198 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (0 of 60 remaining) [2023-08-26 12:44:03,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:44:03,198 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 12:44:03,199 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:44:03,199 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 12:44:03,234 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 12:44:03,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 389 places, 462 transitions, 954 flow [2023-08-26 12:44:03,367 INFO L124 PetriNetUnfolderBase]: 179/1051 cut-off events. [2023-08-26 12:44:03,367 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:44:03,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 1051 events. 179/1051 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6387 event pairs, 1 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 744. Up to 16 conditions per place. [2023-08-26 12:44:03,383 INFO L82 GeneralOperation]: Start removeDead. Operand has 389 places, 462 transitions, 954 flow [2023-08-26 12:44:03,396 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 389 places, 462 transitions, 954 flow [2023-08-26 12:44:03,397 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:44:03,397 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 389 places, 462 transitions, 954 flow [2023-08-26 12:44:03,397 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 389 places, 462 transitions, 954 flow [2023-08-26 12:44:03,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 389 places, 462 transitions, 954 flow [2023-08-26 12:44:03,527 INFO L124 PetriNetUnfolderBase]: 179/1051 cut-off events. [2023-08-26 12:44:03,528 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:44:03,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1079 conditions, 1051 events. 179/1051 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 6387 event pairs, 1 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 744. Up to 16 conditions per place. [2023-08-26 12:44:03,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 130476 [2023-08-26 12:44:09,025 INFO L134 LiptonReduction]: Checked pairs total: 272865 [2023-08-26 12:44:09,025 INFO L136 LiptonReduction]: Total number of compositions: 423 [2023-08-26 12:44:09,026 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:44:09,026 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;@5ff8aa24, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:44:09,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-08-26 12:44:09,027 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:44:09,027 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-26 12:44:09,027 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:44:09,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:44:09,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:44:09,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-08-26 12:44:09,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:44:09,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2918571, now seen corresponding path program 1 times [2023-08-26 12:44:09,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:44:09,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656913494] [2023-08-26 12:44:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:44:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:44:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:44:09,052 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 12:44:09,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:44:09,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656913494] [2023-08-26 12:44:09,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656913494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:44:09,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:44:09,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:44:09,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903386491] [2023-08-26 12:44:09,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:44:09,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:44:09,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:44:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:44:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:44:09,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 376 out of 885 [2023-08-26 12:44:09,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 220 transitions, 470 flow. Second operand has 3 states, 3 states have (on average 377.0) internal successors, (1131), 3 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:44:09,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:44:09,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 376 of 885 [2023-08-26 12:44:09,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand