/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_12-ptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:35:24,261 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:35:24,330 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 12:35:24,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:35:24,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:35:24,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:35:24,360 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:35:24,361 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:35:24,361 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:35:24,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:35:24,364 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:35:24,365 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:35:24,365 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:35:24,366 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:35:24,366 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:35:24,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:35:24,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:35:24,366 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:35:24,366 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:35:24,366 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:35:24,367 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:35:24,367 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:35:24,367 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:35:24,367 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:35:24,368 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:35:24,368 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:35:24,368 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:35:24,368 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:35:24,368 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:35:24,368 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:35:24,369 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:35:24,369 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:35:24,369 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:35:24,369 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:35:24,369 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:35:24,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:35:24,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:35:24,661 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:35:24,663 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:35:24,664 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:35:24,664 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:35:24,665 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-26 12:35:25,709 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:35:25,972 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:35:25,972 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-26 12:35:25,981 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0510bc748/039a8830111d49cb834bcfd5b5fcaf5d/FLAG54358b959 [2023-08-26 12:35:25,989 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0510bc748/039a8830111d49cb834bcfd5b5fcaf5d [2023-08-26 12:35:25,991 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:35:25,991 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:35:25,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:35:25,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:35:25,994 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:35:25,994 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:35:25" (1/1) ... [2023-08-26 12:35:25,995 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c03550 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:25, skipping insertion in model container [2023-08-26 12:35:25,995 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:35:25" (1/1) ... [2023-08-26 12:35:26,023 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:35:26,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:35:26,190 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:35:26,202 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:35:26,203 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:35:26,216 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:35:26,238 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:35:26,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26 WrapperNode [2023-08-26 12:35:26,239 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:35:26,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:35:26,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:35:26,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:35:26,243 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,252 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,265 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2023-08-26 12:35:26,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:35:26,266 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:35:26,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:35:26,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:35:26,271 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,279 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,280 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,288 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,291 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,292 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,293 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:35:26,294 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:35:26,294 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:35:26,294 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:35:26,295 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (1/1) ... [2023-08-26 12:35:26,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:35:26,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:35:26,330 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 12:35:26,343 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 12:35:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:35:26,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:35:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:35:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:35:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:35:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:35:26,369 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:35:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:35:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:35:26,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:35:26,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:35:26,371 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 12:35:26,507 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:35:26,509 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:35:26,733 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:35:26,738 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:35:26,739 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 12:35:26,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:35:26 BoogieIcfgContainer [2023-08-26 12:35:26,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:35:26,742 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:35:26,742 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:35:26,744 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:35:26,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:35:25" (1/3) ... [2023-08-26 12:35:26,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbf633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:35:26, skipping insertion in model container [2023-08-26 12:35:26,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:35:26" (2/3) ... [2023-08-26 12:35:26,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dbf633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:35:26, skipping insertion in model container [2023-08-26 12:35:26,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:35:26" (3/3) ... [2023-08-26 12:35:26,746 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-08-26 12:35:26,758 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:35:26,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-26 12:35:26,759 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:35:26,839 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:35:26,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 137 transitions, 282 flow [2023-08-26 12:35:26,908 INFO L124 PetriNetUnfolderBase]: 19/184 cut-off events. [2023-08-26 12:35:26,908 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:35:26,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 184 events. 19/184 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 552 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 12:35:26,917 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 137 transitions, 282 flow [2023-08-26 12:35:26,920 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 137 transitions, 282 flow [2023-08-26 12:35:26,923 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:35:26,929 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 137 transitions, 282 flow [2023-08-26 12:35:26,931 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 137 transitions, 282 flow [2023-08-26 12:35:26,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 137 transitions, 282 flow [2023-08-26 12:35:26,954 INFO L124 PetriNetUnfolderBase]: 19/184 cut-off events. [2023-08-26 12:35:26,954 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:35:26,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 184 events. 19/184 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 552 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 12:35:26,957 INFO L119 LiptonReduction]: Number of co-enabled transitions 4346 [2023-08-26 12:35:30,053 INFO L134 LiptonReduction]: Checked pairs total: 9598 [2023-08-26 12:35:30,053 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-26 12:35:30,071 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:35:30,084 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;@301874bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:35:30,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2023-08-26 12:35:30,086 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:35:30,086 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:35:30,086 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:35:30,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:30,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:35:30,087 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:35:30,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:30,095 INFO L85 PathProgramCache]: Analyzing trace with hash 16856, now seen corresponding path program 1 times [2023-08-26 12:35:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:30,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028413963] [2023-08-26 12:35:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:30,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:30,390 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 12:35:30,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:30,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028413963] [2023-08-26 12:35:30,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028413963] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:30,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:30,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:35:30,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970151087] [2023-08-26 12:35:30,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:30,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:35:30,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:35:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:35:30,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 262 [2023-08-26 12:35:30,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:30,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 262 [2023-08-26 12:35:30,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:30,546 INFO L124 PetriNetUnfolderBase]: 192/464 cut-off events. [2023-08-26 12:35:30,546 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:35:30,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 464 events. 192/464 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2347 event pairs, 165 based on Foata normal form. 17/322 useless extension candidates. Maximal degree in co-relation 862. Up to 407 conditions per place. [2023-08-26 12:35:30,550 INFO L140 encePairwiseOnDemand]: 247/262 looper letters, 44 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-26 12:35:30,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 204 flow [2023-08-26 12:35:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:35:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:35:30,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-26 12:35:30,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43256997455470736 [2023-08-26 12:35:30,561 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-26 12:35:30,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-26 12:35:30,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:30,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-26 12:35:30,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,572 INFO L175 Difference]: Start difference. First operand has 42 places, 49 transitions, 106 flow. Second operand 3 states and 340 transitions. [2023-08-26 12:35:30,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 204 flow [2023-08-26 12:35:30,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:35:30,576 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 94 flow [2023-08-26 12:35:30,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-26 12:35:30,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-26 12:35:30,580 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 94 flow [2023-08-26 12:35:30,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:30,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:35:30,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:35:30,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:35:30,581 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:30,581 INFO L85 PathProgramCache]: Analyzing trace with hash 16857, now seen corresponding path program 1 times [2023-08-26 12:35:30,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:30,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984773846] [2023-08-26 12:35:30,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:30,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:30,624 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 12:35:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984773846] [2023-08-26 12:35:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984773846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:30,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:30,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:35:30,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219568009] [2023-08-26 12:35:30,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:30,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:35:30,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:35:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:35:30,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 262 [2023-08-26 12:35:30,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:30,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 262 [2023-08-26 12:35:30,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:30,706 INFO L124 PetriNetUnfolderBase]: 210/464 cut-off events. [2023-08-26 12:35:30,707 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-26 12:35:30,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 999 conditions, 464 events. 210/464 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2200 event pairs, 195 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 964. Up to 425 conditions per place. [2023-08-26 12:35:30,709 INFO L140 encePairwiseOnDemand]: 258/262 looper letters, 43 selfloop transitions, 2 changer transitions 3/51 dead transitions. [2023-08-26 12:35:30,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 216 flow [2023-08-26 12:35:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:35:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:35:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-26 12:35:30,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300254452926209 [2023-08-26 12:35:30,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-26 12:35:30,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-26 12:35:30,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:30,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-26 12:35:30,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,715 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 94 flow. Second operand 3 states and 338 transitions. [2023-08-26 12:35:30,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 216 flow [2023-08-26 12:35:30,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:35:30,717 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 90 flow [2023-08-26 12:35:30,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 12:35:30,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-26 12:35:30,717 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 90 flow [2023-08-26 12:35:30,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:30,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:30,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:35:30,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:35:30,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:35:30,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash 502500134, now seen corresponding path program 1 times [2023-08-26 12:35:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:30,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029078281] [2023-08-26 12:35:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:30,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:30,792 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 12:35:30,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029078281] [2023-08-26 12:35:30,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029078281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:35:30,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971683018] [2023-08-26 12:35:30,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:30,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:35:30,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:35:30,796 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 12:35:30,827 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 12:35:30,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:30,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:35:30,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:35:30,949 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 12:35:30,984 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 12:35:30,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:35:31,015 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 12:35:31,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971683018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:35:31,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:35:31,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 12:35:31,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013717619] [2023-08-26 12:35:31,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:35:31,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:35:31,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:35:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:35:31,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 262 [2023-08-26 12:35:31,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:31,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 262 [2023-08-26 12:35:31,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:31,064 INFO L124 PetriNetUnfolderBase]: 24/83 cut-off events. [2023-08-26 12:35:31,064 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:35:31,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 83 events. 24/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 265 event pairs, 0 based on Foata normal form. 13/89 useless extension candidates. Maximal degree in co-relation 174. Up to 50 conditions per place. [2023-08-26 12:35:31,065 INFO L140 encePairwiseOnDemand]: 258/262 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-08-26 12:35:31,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 137 flow [2023-08-26 12:35:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:35:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:35:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 395 transitions. [2023-08-26 12:35:31,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37690839694656486 [2023-08-26 12:35:31,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 395 transitions. [2023-08-26 12:35:31,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 395 transitions. [2023-08-26 12:35:31,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:31,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 395 transitions. [2023-08-26 12:35:31,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,071 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,071 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 90 flow. Second operand 4 states and 395 transitions. [2023-08-26 12:35:31,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 137 flow [2023-08-26 12:35:31,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:35:31,073 INFO L231 Difference]: Finished difference. Result has 29 places, 22 transitions, 54 flow [2023-08-26 12:35:31,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=22} [2023-08-26 12:35:31,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -13 predicate places. [2023-08-26 12:35:31,074 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 22 transitions, 54 flow [2023-08-26 12:35:31,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:31,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:35:31,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 12:35:31,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:35:31,283 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:35:31,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:31,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1602394311, now seen corresponding path program 1 times [2023-08-26 12:35:31,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:31,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80389500] [2023-08-26 12:35:31,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:31,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:31,409 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 12:35:31,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:31,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80389500] [2023-08-26 12:35:31,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80389500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:31,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:31,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:35:31,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599592451] [2023-08-26 12:35:31,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:31,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:35:31,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:35:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:35:31,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 262 [2023-08-26 12:35:31,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 54 flow. Second operand has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:31,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 262 [2023-08-26 12:35:31,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:31,447 INFO L124 PetriNetUnfolderBase]: 26/77 cut-off events. [2023-08-26 12:35:31,448 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-26 12:35:31,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 77 events. 26/77 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 166 event pairs, 0 based on Foata normal form. 3/68 useless extension candidates. Maximal degree in co-relation 162. Up to 65 conditions per place. [2023-08-26 12:35:31,448 INFO L140 encePairwiseOnDemand]: 258/262 looper letters, 17 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2023-08-26 12:35:31,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 22 transitions, 94 flow [2023-08-26 12:35:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:35:31,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:35:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 377 transitions. [2023-08-26 12:35:31,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597328244274809 [2023-08-26 12:35:31,450 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 377 transitions. [2023-08-26 12:35:31,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 377 transitions. [2023-08-26 12:35:31,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:31,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 377 transitions. [2023-08-26 12:35:31,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.25) internal successors, (377), 4 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,453 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,453 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 54 flow. Second operand 4 states and 377 transitions. [2023-08-26 12:35:31,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 22 transitions, 94 flow [2023-08-26 12:35:31,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 90 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:35:31,454 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 51 flow [2023-08-26 12:35:31,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=51, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-08-26 12:35:31,454 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -14 predicate places. [2023-08-26 12:35:31,454 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 51 flow [2023-08-26 12:35:31,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:31,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:31,455 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 12:35:31,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:35:31,455 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2023-08-26 12:35:31,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:31,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1602364690, now seen corresponding path program 1 times [2023-08-26 12:35:31,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:31,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398840377] [2023-08-26 12:35:31,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:31,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:35:31,464 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:35:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:35:31,480 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:35:31,481 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:35:31,481 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (23 of 24 remaining) [2023-08-26 12:35:31,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 24 remaining) [2023-08-26 12:35:31,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 24 remaining) [2023-08-26 12:35:31,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 24 remaining) [2023-08-26 12:35:31,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 24 remaining) [2023-08-26 12:35:31,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 24 remaining) [2023-08-26 12:35:31,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 24 remaining) [2023-08-26 12:35:31,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (16 of 24 remaining) [2023-08-26 12:35:31,483 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 24 remaining) [2023-08-26 12:35:31,484 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 24 remaining) [2023-08-26 12:35:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 24 remaining) [2023-08-26 12:35:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 24 remaining) [2023-08-26 12:35:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 24 remaining) [2023-08-26 12:35:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 24 remaining) [2023-08-26 12:35:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 24 remaining) [2023-08-26 12:35:31,485 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 24 remaining) [2023-08-26 12:35:31,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:35:31,485 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 12:35:31,487 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:35:31,487 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:35:31,506 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 12:35:31,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 12:35:31,548 INFO L124 PetriNetUnfolderBase]: 34/301 cut-off events. [2023-08-26 12:35:31,548 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:35:31,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 34/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1082 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2023-08-26 12:35:31,549 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 12:35:31,551 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 180 transitions, 378 flow [2023-08-26 12:35:31,551 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:35:31,551 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 180 transitions, 378 flow [2023-08-26 12:35:31,552 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 180 transitions, 378 flow [2023-08-26 12:35:31,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 12:35:31,570 INFO L124 PetriNetUnfolderBase]: 34/301 cut-off events. [2023-08-26 12:35:31,570 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:35:31,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 34/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1082 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2023-08-26 12:35:31,577 INFO L119 LiptonReduction]: Number of co-enabled transitions 12956 [2023-08-26 12:35:34,858 INFO L134 LiptonReduction]: Checked pairs total: 34574 [2023-08-26 12:35:34,865 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-26 12:35:34,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:35:34,870 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;@301874bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:35:34,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 32 error locations. [2023-08-26 12:35:34,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:35:34,875 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:35:34,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:35:34,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:34,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:35:34,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:35:34,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:34,875 INFO L85 PathProgramCache]: Analyzing trace with hash 29007, now seen corresponding path program 1 times [2023-08-26 12:35:34,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:34,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956786366] [2023-08-26 12:35:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:34,914 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 12:35:34,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:34,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956786366] [2023-08-26 12:35:34,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956786366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:34,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:34,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:35:34,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506096125] [2023-08-26 12:35:34,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:34,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:35:34,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:34,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:35:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:35:34,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 337 [2023-08-26 12:35:34,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 77 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:34,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:34,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 337 [2023-08-26 12:35:34,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:35,662 INFO L124 PetriNetUnfolderBase]: 7268/12052 cut-off events. [2023-08-26 12:35:35,662 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2023-08-26 12:35:35,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23627 conditions, 12052 events. 7268/12052 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 84595 event pairs, 3444 based on Foata normal form. 534/8211 useless extension candidates. Maximal degree in co-relation 2535. Up to 11445 conditions per place. [2023-08-26 12:35:35,709 INFO L140 encePairwiseOnDemand]: 315/337 looper letters, 65 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-26 12:35:35,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 76 transitions, 304 flow [2023-08-26 12:35:35,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:35:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:35:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-26 12:35:35,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44411473788328387 [2023-08-26 12:35:35,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-26 12:35:35,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-26 12:35:35,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:35,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-26 12:35:35,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:35,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:35,715 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:35,715 INFO L175 Difference]: Start difference. First operand has 66 places, 77 transitions, 172 flow. Second operand 3 states and 449 transitions. [2023-08-26 12:35:35,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 76 transitions, 304 flow [2023-08-26 12:35:35,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 76 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:35:35,718 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 150 flow [2023-08-26 12:35:35,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-26 12:35:35,720 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2023-08-26 12:35:35,721 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 150 flow [2023-08-26 12:35:35,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:35,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:35,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:35:35,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:35:35,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:35:35,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:35,721 INFO L85 PathProgramCache]: Analyzing trace with hash 29005, now seen corresponding path program 1 times [2023-08-26 12:35:35,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:35,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184262794] [2023-08-26 12:35:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:35,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:35,740 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 12:35:35,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:35,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184262794] [2023-08-26 12:35:35,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184262794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:35,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:35,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:35:35,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195945832] [2023-08-26 12:35:35,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:35,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:35:35,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:35,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:35:35,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:35:35,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 337 [2023-08-26 12:35:35,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:35,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:35,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 337 [2023-08-26 12:35:35,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:36,396 INFO L124 PetriNetUnfolderBase]: 7277/11804 cut-off events. [2023-08-26 12:35:36,397 INFO L125 PetriNetUnfolderBase]: For 631/631 co-relation queries the response was YES. [2023-08-26 12:35:36,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24195 conditions, 11804 events. 7277/11804 cut-off events. For 631/631 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 79532 event pairs, 6750 based on Foata normal form. 0/7586 useless extension candidates. Maximal degree in co-relation 24083. Up to 10661 conditions per place. [2023-08-26 12:35:36,435 INFO L140 encePairwiseOnDemand]: 333/337 looper letters, 79 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-26 12:35:36,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 88 transitions, 368 flow [2023-08-26 12:35:36,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:35:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:35:36,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 451 transitions. [2023-08-26 12:35:36,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44609297725024727 [2023-08-26 12:35:36,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 451 transitions. [2023-08-26 12:35:36,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 451 transitions. [2023-08-26 12:35:36,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:36,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 451 transitions. [2023-08-26 12:35:36,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.33333333333334) internal successors, (451), 3 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:36,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:36,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:36,440 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 150 flow. Second operand 3 states and 451 transitions. [2023-08-26 12:35:36,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 88 transitions, 368 flow [2023-08-26 12:35:36,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 88 transitions, 366 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:35:36,443 INFO L231 Difference]: Finished difference. Result has 64 places, 58 transitions, 148 flow [2023-08-26 12:35:36,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=58} [2023-08-26 12:35:36,444 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-26 12:35:36,444 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 58 transitions, 148 flow [2023-08-26 12:35:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:36,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:36,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:35:36,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:35:36,445 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:35:36,447 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:36,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1039815421, now seen corresponding path program 1 times [2023-08-26 12:35:36,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:36,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057231617] [2023-08-26 12:35:36,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:36,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:36,512 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 12:35:36,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:36,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057231617] [2023-08-26 12:35:36,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057231617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:35:36,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414070999] [2023-08-26 12:35:36,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:36,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:35:36,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:35:36,514 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 12:35:36,557 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 12:35:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:36,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:35:36,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:35:36,620 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 12:35:36,649 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 12:35:36,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:35:36,683 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 12:35:36,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414070999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:35:36,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:35:36,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 12:35:36,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503431567] [2023-08-26 12:35:36,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:35:36,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:35:36,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:36,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:35:36,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:35:36,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 337 [2023-08-26 12:35:36,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 58 transitions, 148 flow. Second operand has 7 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:36,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:36,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 337 [2023-08-26 12:35:36,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:37,395 INFO L124 PetriNetUnfolderBase]: 5839/9511 cut-off events. [2023-08-26 12:35:37,396 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2023-08-26 12:35:37,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19960 conditions, 9511 events. 5839/9511 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 66584 event pairs, 1 based on Foata normal form. 15/6863 useless extension candidates. Maximal degree in co-relation 18286. Up to 7392 conditions per place. [2023-08-26 12:35:37,431 INFO L140 encePairwiseOnDemand]: 333/337 looper letters, 116 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2023-08-26 12:35:37,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 129 transitions, 528 flow [2023-08-26 12:35:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:35:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:35:37,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 713 transitions. [2023-08-26 12:35:37,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42314540059347183 [2023-08-26 12:35:37,434 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 713 transitions. [2023-08-26 12:35:37,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 713 transitions. [2023-08-26 12:35:37,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:37,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 713 transitions. [2023-08-26 12:35:37,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:37,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:37,438 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:37,438 INFO L175 Difference]: Start difference. First operand has 64 places, 58 transitions, 148 flow. Second operand 5 states and 713 transitions. [2023-08-26 12:35:37,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 129 transitions, 528 flow [2023-08-26 12:35:37,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 129 transitions, 524 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:35:37,451 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 148 flow [2023-08-26 12:35:37,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-08-26 12:35:37,452 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2023-08-26 12:35:37,452 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 148 flow [2023-08-26 12:35:37,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:37,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:37,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:35:37,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 12:35:37,659 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,SelfDestructingSolverStorable7 [2023-08-26 12:35:37,660 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:35:37,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:37,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1040049776, now seen corresponding path program 1 times [2023-08-26 12:35:37,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:37,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32290395] [2023-08-26 12:35:37,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:37,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:37,760 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 12:35:37,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:37,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32290395] [2023-08-26 12:35:37,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32290395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:37,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:37,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:35:37,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308845334] [2023-08-26 12:35:37,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:35:37,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:37,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:35:37,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:35:37,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 337 [2023-08-26 12:35:37,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:37,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:37,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 337 [2023-08-26 12:35:37,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:38,250 INFO L124 PetriNetUnfolderBase]: 5049/8327 cut-off events. [2023-08-26 12:35:38,251 INFO L125 PetriNetUnfolderBase]: For 1381/1381 co-relation queries the response was YES. [2023-08-26 12:35:38,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17253 conditions, 8327 events. 5049/8327 cut-off events. For 1381/1381 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 53575 event pairs, 2127 based on Foata normal form. 203/6069 useless extension candidates. Maximal degree in co-relation 16682. Up to 6972 conditions per place. [2023-08-26 12:35:38,277 INFO L140 encePairwiseOnDemand]: 331/337 looper letters, 112 selfloop transitions, 5 changer transitions 0/125 dead transitions. [2023-08-26 12:35:38,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 125 transitions, 538 flow [2023-08-26 12:35:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:35:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:35:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 811 transitions. [2023-08-26 12:35:38,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010880316518299 [2023-08-26 12:35:38,280 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 811 transitions. [2023-08-26 12:35:38,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 811 transitions. [2023-08-26 12:35:38,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:38,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 811 transitions. [2023-08-26 12:35:38,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.16666666666666) internal successors, (811), 6 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,285 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 337.0) internal successors, (2359), 7 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,285 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 148 flow. Second operand 6 states and 811 transitions. [2023-08-26 12:35:38,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 125 transitions, 538 flow [2023-08-26 12:35:38,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 125 transitions, 521 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 12:35:38,288 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 146 flow [2023-08-26 12:35:38,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2023-08-26 12:35:38,289 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-26 12:35:38,289 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 146 flow [2023-08-26 12:35:38,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:38,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:35:38,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:35:38,290 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:35:38,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:38,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2118196550, now seen corresponding path program 1 times [2023-08-26 12:35:38,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:38,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615527066] [2023-08-26 12:35:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:38,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:38,365 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 12:35:38,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:38,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615527066] [2023-08-26 12:35:38,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615527066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:38,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:38,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:35:38,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634396336] [2023-08-26 12:35:38,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:35:38,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:35:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:35:38,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 337 [2023-08-26 12:35:38,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:38,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 337 [2023-08-26 12:35:38,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:38,741 INFO L124 PetriNetUnfolderBase]: 3665/6135 cut-off events. [2023-08-26 12:35:38,741 INFO L125 PetriNetUnfolderBase]: For 725/725 co-relation queries the response was YES. [2023-08-26 12:35:38,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12700 conditions, 6135 events. 3665/6135 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 37798 event pairs, 1471 based on Foata normal form. 0/5039 useless extension candidates. Maximal degree in co-relation 12256. Up to 4764 conditions per place. [2023-08-26 12:35:38,758 INFO L140 encePairwiseOnDemand]: 325/337 looper letters, 110 selfloop transitions, 8 changer transitions 3/128 dead transitions. [2023-08-26 12:35:38,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 128 transitions, 545 flow [2023-08-26 12:35:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:35:38,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:35:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 698 transitions. [2023-08-26 12:35:38,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142433234421365 [2023-08-26 12:35:38,760 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 698 transitions. [2023-08-26 12:35:38,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 698 transitions. [2023-08-26 12:35:38,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:38,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 698 transitions. [2023-08-26 12:35:38,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,764 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 337.0) internal successors, (2022), 6 states have internal predecessors, (2022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,764 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 146 flow. Second operand 5 states and 698 transitions. [2023-08-26 12:35:38,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 128 transitions, 545 flow [2023-08-26 12:35:38,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 128 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:35:38,768 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 202 flow [2023-08-26 12:35:38,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2023-08-26 12:35:38,769 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-26 12:35:38,769 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 202 flow [2023-08-26 12:35:38,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:38,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:35:38,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:35:38,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:35:38,770 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1135859835, now seen corresponding path program 1 times [2023-08-26 12:35:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987788356] [2023-08-26 12:35:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 12:35:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987788356] [2023-08-26 12:35:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987788356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:35:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889244025] [2023-08-26 12:35:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:35:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:35:38,868 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 12:35:38,870 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 12:35:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:38,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 12:35:38,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:35:38,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:35:38,938 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:35:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 12:35:38,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:35:38,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889244025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:38,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:35:38,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 12:35:38,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949848714] [2023-08-26 12:35:38,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:38,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:35:38,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:38,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:35:38,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:35:38,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 337 [2023-08-26 12:35:38,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:38,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:38,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 337 [2023-08-26 12:35:38,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:39,280 INFO L124 PetriNetUnfolderBase]: 3186/5475 cut-off events. [2023-08-26 12:35:39,280 INFO L125 PetriNetUnfolderBase]: For 3230/3230 co-relation queries the response was YES. [2023-08-26 12:35:39,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12591 conditions, 5475 events. 3186/5475 cut-off events. For 3230/3230 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 34547 event pairs, 121 based on Foata normal form. 135/4763 useless extension candidates. Maximal degree in co-relation 11657. Up to 4881 conditions per place. [2023-08-26 12:35:39,298 INFO L140 encePairwiseOnDemand]: 333/337 looper letters, 78 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-26 12:35:39,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 480 flow [2023-08-26 12:35:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:35:39,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:35:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-08-26 12:35:39,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072700296735905 [2023-08-26 12:35:39,300 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-08-26 12:35:39,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-08-26 12:35:39,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:39,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-08-26 12:35:39,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:39,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:39,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:39,304 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 202 flow. Second operand 4 states and 549 transitions. [2023-08-26 12:35:39,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 480 flow [2023-08-26 12:35:39,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:35:39,307 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 197 flow [2023-08-26 12:35:39,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-08-26 12:35:39,308 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2023-08-26 12:35:39,308 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 197 flow [2023-08-26 12:35:39,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:39,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:39,309 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 12:35:39,321 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 12:35:39,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:35:39,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 29 more)] === [2023-08-26 12:35:39,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:39,514 INFO L85 PathProgramCache]: Analyzing trace with hash 844374500, now seen corresponding path program 1 times [2023-08-26 12:35:39,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:39,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734674061] [2023-08-26 12:35:39,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:39,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:35:39,523 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:35:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:35:39,537 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:35:39,537 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:35:39,537 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (31 of 32 remaining) [2023-08-26 12:35:39,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 32 remaining) [2023-08-26 12:35:39,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 32 remaining) [2023-08-26 12:35:39,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (24 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 32 remaining) [2023-08-26 12:35:39,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 32 remaining) [2023-08-26 12:35:39,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 32 remaining) [2023-08-26 12:35:39,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:35:39,540 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:35:39,540 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:35:39,540 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 12:35:39,563 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 12:35:39,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 12:35:39,598 INFO L124 PetriNetUnfolderBase]: 54/455 cut-off events. [2023-08-26 12:35:39,598 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:35:39,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 455 events. 54/455 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1806 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2023-08-26 12:35:39,599 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 12:35:39,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 223 transitions, 476 flow [2023-08-26 12:35:39,601 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:35:39,601 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 223 transitions, 476 flow [2023-08-26 12:35:39,601 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 223 transitions, 476 flow [2023-08-26 12:35:39,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 12:35:39,626 INFO L124 PetriNetUnfolderBase]: 54/455 cut-off events. [2023-08-26 12:35:39,627 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:35:39,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 455 events. 54/455 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1806 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2023-08-26 12:35:39,639 INFO L119 LiptonReduction]: Number of co-enabled transitions 24846 [2023-08-26 12:35:42,635 INFO L134 LiptonReduction]: Checked pairs total: 71410 [2023-08-26 12:35:42,635 INFO L136 LiptonReduction]: Total number of compositions: 183 [2023-08-26 12:35:42,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:35:42,636 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;@301874bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:35:42,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2023-08-26 12:35:42,637 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:35:42,637 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:35:42,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:35:42,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:42,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:35:42,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:35:42,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:42,638 INFO L85 PathProgramCache]: Analyzing trace with hash 43375, now seen corresponding path program 1 times [2023-08-26 12:35:42,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:42,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620009912] [2023-08-26 12:35:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:42,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:42,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:42,661 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 12:35:42,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:42,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620009912] [2023-08-26 12:35:42,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620009912] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:42,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:42,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:35:42,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847871123] [2023-08-26 12:35:42,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:42,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:35:42,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:35:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:35:42,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 406 [2023-08-26 12:35:42,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:42,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:42,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 406 [2023-08-26 12:35:42,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:35:55,017 INFO L124 PetriNetUnfolderBase]: 148424/212748 cut-off events. [2023-08-26 12:35:55,018 INFO L125 PetriNetUnfolderBase]: For 2631/2631 co-relation queries the response was YES. [2023-08-26 12:35:55,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419383 conditions, 212748 events. 148424/212748 cut-off events. For 2631/2631 co-relation queries the response was YES. Maximal size of possible extension queue 6014. Compared 1677243 event pairs, 97107 based on Foata normal form. 11354/156510 useless extension candidates. Maximal degree in co-relation 30767. Up to 204871 conditions per place. [2023-08-26 12:35:56,183 INFO L140 encePairwiseOnDemand]: 375/406 looper letters, 78 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-26 12:35:56,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 94 transitions, 378 flow [2023-08-26 12:35:56,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:35:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:35:56,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 552 transitions. [2023-08-26 12:35:56,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45320197044334976 [2023-08-26 12:35:56,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 552 transitions. [2023-08-26 12:35:56,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 552 transitions. [2023-08-26 12:35:56,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:35:56,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 552 transitions. [2023-08-26 12:35:56,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:56,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:56,189 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:56,189 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 240 flow. Second operand 3 states and 552 transitions. [2023-08-26 12:35:56,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 94 transitions, 378 flow [2023-08-26 12:35:56,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 94 transitions, 378 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:35:56,191 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 200 flow [2023-08-26 12:35:56,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-26 12:35:56,192 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -3 predicate places. [2023-08-26 12:35:56,192 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 200 flow [2023-08-26 12:35:56,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:56,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:35:56,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:35:56,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:35:56,193 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:35:56,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:35:56,193 INFO L85 PathProgramCache]: Analyzing trace with hash 43374, now seen corresponding path program 1 times [2023-08-26 12:35:56,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:35:56,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765207870] [2023-08-26 12:35:56,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:35:56,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:35:56,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:35:56,209 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 12:35:56,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:35:56,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765207870] [2023-08-26 12:35:56,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765207870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:35:56,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:35:56,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:35:56,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486687707] [2023-08-26 12:35:56,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:35:56,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:35:56,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:35:56,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:35:56,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:35:56,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 406 [2023-08-26 12:35:56,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:35:56,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:35:56,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 406 [2023-08-26 12:35:56,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:10,948 INFO L124 PetriNetUnfolderBase]: 192997/267495 cut-off events. [2023-08-26 12:36:10,948 INFO L125 PetriNetUnfolderBase]: For 12502/12502 co-relation queries the response was YES. [2023-08-26 12:36:11,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549067 conditions, 267495 events. 192997/267495 cut-off events. For 12502/12502 co-relation queries the response was YES. Maximal size of possible extension queue 7277. Compared 2019063 event pairs, 178887 based on Foata normal form. 0/169685 useless extension candidates. Maximal degree in co-relation 548954. Up to 246515 conditions per place. [2023-08-26 12:36:12,270 INFO L140 encePairwiseOnDemand]: 402/406 looper letters, 113 selfloop transitions, 2 changer transitions 0/123 dead transitions. [2023-08-26 12:36:12,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 123 transitions, 518 flow [2023-08-26 12:36:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:36:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:36:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2023-08-26 12:36:12,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46469622331691296 [2023-08-26 12:36:12,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2023-08-26 12:36:12,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2023-08-26 12:36:12,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:12,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2023-08-26 12:36:12,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:12,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:12,275 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 406.0) internal successors, (1624), 4 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:12,275 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 200 flow. Second operand 3 states and 566 transitions. [2023-08-26 12:36:12,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 123 transitions, 518 flow [2023-08-26 12:36:12,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 123 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:36:12,282 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 198 flow [2023-08-26 12:36:12,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2023-08-26 12:36:12,283 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-08-26 12:36:12,283 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 198 flow [2023-08-26 12:36:12,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:12,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:12,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:36:12,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:36:12,283 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:36:12,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:12,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1439140624, now seen corresponding path program 1 times [2023-08-26 12:36:12,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:12,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848145326] [2023-08-26 12:36:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:12,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:12,336 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 12:36:12,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:12,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848145326] [2023-08-26 12:36:12,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848145326] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:12,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:12,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:36:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956899865] [2023-08-26 12:36:12,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:12,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:36:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:12,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:36:12,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:36:12,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 406 [2023-08-26 12:36:12,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:12,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:12,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 406 [2023-08-26 12:36:12,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:21,701 INFO L124 PetriNetUnfolderBase]: 121872/173980 cut-off events. [2023-08-26 12:36:21,702 INFO L125 PetriNetUnfolderBase]: For 11834/11834 co-relation queries the response was YES. [2023-08-26 12:36:21,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357021 conditions, 173980 events. 121872/173980 cut-off events. For 11834/11834 co-relation queries the response was YES. Maximal size of possible extension queue 4893. Compared 1324957 event pairs, 71817 based on Foata normal form. 3240/129941 useless extension candidates. Maximal degree in co-relation 327430. Up to 147314 conditions per place. [2023-08-26 12:36:22,491 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 170 selfloop transitions, 5 changer transitions 0/187 dead transitions. [2023-08-26 12:36:22,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 187 transitions, 796 flow [2023-08-26 12:36:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:36:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:36:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1025 transitions. [2023-08-26 12:36:22,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42077175697865354 [2023-08-26 12:36:22,495 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1025 transitions. [2023-08-26 12:36:22,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1025 transitions. [2023-08-26 12:36:22,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:22,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1025 transitions. [2023-08-26 12:36:22,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.83333333333334) internal successors, (1025), 6 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:22,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:22,499 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:22,499 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 198 flow. Second operand 6 states and 1025 transitions. [2023-08-26 12:36:22,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 187 transitions, 796 flow [2023-08-26 12:36:22,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 187 transitions, 790 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:36:22,749 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 202 flow [2023-08-26 12:36:22,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2023-08-26 12:36:22,749 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-08-26 12:36:22,749 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 202 flow [2023-08-26 12:36:22,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:22,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:22,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:36:22,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:36:22,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:36:22,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1438832358, now seen corresponding path program 1 times [2023-08-26 12:36:22,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:22,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857823532] [2023-08-26 12:36:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:22,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:22,787 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 12:36:22,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857823532] [2023-08-26 12:36:22,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857823532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:36:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605052667] [2023-08-26 12:36:22,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:22,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:22,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:36:22,788 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 12:36:22,790 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 12:36:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:22,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:36:22,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:36:22,854 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 12:36:22,881 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 12:36:22,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:36:22,911 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 12:36:22,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605052667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:36:22,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:36:22,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:36:22,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733190580] [2023-08-26 12:36:22,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:36:22,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:36:22,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:22,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:36:22,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:36:22,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 406 [2023-08-26 12:36:22,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 202 flow. Second operand has 8 states, 8 states have (on average 146.875) internal successors, (1175), 8 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:22,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:22,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 406 [2023-08-26 12:36:22,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:24,670 INFO L124 PetriNetUnfolderBase]: 19450/30557 cut-off events. [2023-08-26 12:36:24,670 INFO L125 PetriNetUnfolderBase]: For 11906/11906 co-relation queries the response was YES. [2023-08-26 12:36:24,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69763 conditions, 30557 events. 19450/30557 cut-off events. For 11906/11906 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 230547 event pairs, 2112 based on Foata normal form. 2700/28162 useless extension candidates. Maximal degree in co-relation 63203. Up to 19044 conditions per place. [2023-08-26 12:36:24,805 INFO L140 encePairwiseOnDemand]: 402/406 looper letters, 118 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2023-08-26 12:36:24,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 135 transitions, 553 flow [2023-08-26 12:36:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:36:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:36:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 998 transitions. [2023-08-26 12:36:24,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409688013136289 [2023-08-26 12:36:24,807 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 998 transitions. [2023-08-26 12:36:24,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 998 transitions. [2023-08-26 12:36:24,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:24,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 998 transitions. [2023-08-26 12:36:24,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.33333333333334) internal successors, (998), 6 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:24,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:24,812 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 406.0) internal successors, (2842), 7 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:24,812 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 202 flow. Second operand 6 states and 998 transitions. [2023-08-26 12:36:24,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 135 transitions, 553 flow [2023-08-26 12:36:24,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 135 transitions, 541 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-26 12:36:24,823 INFO L231 Difference]: Finished difference. Result has 72 places, 59 transitions, 150 flow [2023-08-26 12:36:24,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=72, PETRI_TRANSITIONS=59} [2023-08-26 12:36:24,823 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -16 predicate places. [2023-08-26 12:36:24,823 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 59 transitions, 150 flow [2023-08-26 12:36:24,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 146.875) internal successors, (1175), 8 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:24,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:24,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:36:24,837 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 12:36:25,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 12:36:25,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:36:25,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:25,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1663686104, now seen corresponding path program 1 times [2023-08-26 12:36:25,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:25,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53746746] [2023-08-26 12:36:25,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:25,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:25,087 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 12:36:25,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:25,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53746746] [2023-08-26 12:36:25,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53746746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:25,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:25,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:36:25,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995308504] [2023-08-26 12:36:25,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:25,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:36:25,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:25,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:36:25,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:36:25,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 406 [2023-08-26 12:36:25,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 59 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:25,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:25,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 406 [2023-08-26 12:36:25,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:26,685 INFO L124 PetriNetUnfolderBase]: 20864/29600 cut-off events. [2023-08-26 12:36:26,686 INFO L125 PetriNetUnfolderBase]: For 9176/9176 co-relation queries the response was YES. [2023-08-26 12:36:26,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66309 conditions, 29600 events. 20864/29600 cut-off events. For 9176/9176 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 187349 event pairs, 16339 based on Foata normal form. 0/24012 useless extension candidates. Maximal degree in co-relation 66119. Up to 27360 conditions per place. [2023-08-26 12:36:26,847 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 83 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-26 12:36:26,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 408 flow [2023-08-26 12:36:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:36:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:36:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 645 transitions. [2023-08-26 12:36:26,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39716748768472904 [2023-08-26 12:36:26,849 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 645 transitions. [2023-08-26 12:36:26,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 645 transitions. [2023-08-26 12:36:26,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:26,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 645 transitions. [2023-08-26 12:36:26,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.25) internal successors, (645), 4 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:26,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:26,852 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:26,852 INFO L175 Difference]: Start difference. First operand has 72 places, 59 transitions, 150 flow. Second operand 4 states and 645 transitions. [2023-08-26 12:36:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 408 flow [2023-08-26 12:36:26,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 393 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 12:36:26,859 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 137 flow [2023-08-26 12:36:26,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=137, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-08-26 12:36:26,859 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -20 predicate places. [2023-08-26 12:36:26,860 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 137 flow [2023-08-26 12:36:26,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.2) internal successors, (706), 5 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:26,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:26,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:36:26,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:36:26,860 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:36:26,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2067303328, now seen corresponding path program 1 times [2023-08-26 12:36:26,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:26,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255835513] [2023-08-26 12:36:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:26,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 12:36:26,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:26,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255835513] [2023-08-26 12:36:26,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255835513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:36:26,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809352209] [2023-08-26 12:36:26,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:26,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:26,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:36:26,926 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 12:36:26,942 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 12:36:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:27,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 12:36:27,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:36:27,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:36:27,016 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:36:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 12:36:27,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:36:27,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809352209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:27,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:36:27,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 12:36:27,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716863433] [2023-08-26 12:36:27,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:27,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:36:27,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:27,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:36:27,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:36:27,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 406 [2023-08-26 12:36:27,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 137 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:27,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:27,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 406 [2023-08-26 12:36:27,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:28,192 INFO L124 PetriNetUnfolderBase]: 16096/23907 cut-off events. [2023-08-26 12:36:28,193 INFO L125 PetriNetUnfolderBase]: For 3366/3366 co-relation queries the response was YES. [2023-08-26 12:36:28,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50822 conditions, 23907 events. 16096/23907 cut-off events. For 3366/3366 co-relation queries the response was YES. Maximal size of possible extension queue 719. Compared 163167 event pairs, 730 based on Foata normal form. 480/20784 useless extension candidates. Maximal degree in co-relation 44291. Up to 21606 conditions per place. [2023-08-26 12:36:28,336 INFO L140 encePairwiseOnDemand]: 402/406 looper letters, 69 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-26 12:36:28,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 80 transitions, 341 flow [2023-08-26 12:36:28,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:36:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:36:28,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 654 transitions. [2023-08-26 12:36:28,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027093596059113 [2023-08-26 12:36:28,338 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 654 transitions. [2023-08-26 12:36:28,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 654 transitions. [2023-08-26 12:36:28,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:28,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 654 transitions. [2023-08-26 12:36:28,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 163.5) internal successors, (654), 4 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:28,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:28,341 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:28,341 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 137 flow. Second operand 4 states and 654 transitions. [2023-08-26 12:36:28,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 80 transitions, 341 flow [2023-08-26 12:36:28,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 80 transitions, 337 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:36:28,343 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 134 flow [2023-08-26 12:36:28,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-08-26 12:36:28,344 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -21 predicate places. [2023-08-26 12:36:28,344 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 134 flow [2023-08-26 12:36:28,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:28,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:28,344 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:36:28,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-26 12:36:28,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 12:36:28,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:36:28,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:28,549 INFO L85 PathProgramCache]: Analyzing trace with hash -338112296, now seen corresponding path program 1 times [2023-08-26 12:36:28,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:28,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009513860] [2023-08-26 12:36:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:28,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:36:28,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009513860] [2023-08-26 12:36:28,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009513860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:36:28,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062840515] [2023-08-26 12:36:28,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:28,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:28,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:36:28,621 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 12:36:28,623 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 12:36:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:28,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 12:36:28,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:36:28,697 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 12:36:28,697 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 12:36:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 12:36:28,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:36:28,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062840515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:28,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:36:28,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-26 12:36:28,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416472530] [2023-08-26 12:36:28,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:28,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:36:28,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:28,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:36:28,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:36:28,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 406 [2023-08-26 12:36:28,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:28,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:28,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 406 [2023-08-26 12:36:28,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:29,590 INFO L124 PetriNetUnfolderBase]: 12848/19408 cut-off events. [2023-08-26 12:36:29,590 INFO L125 PetriNetUnfolderBase]: For 2669/2669 co-relation queries the response was YES. [2023-08-26 12:36:29,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41471 conditions, 19408 events. 12848/19408 cut-off events. For 2669/2669 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 131204 event pairs, 824 based on Foata normal form. 0/17604 useless extension candidates. Maximal degree in co-relation 36140. Up to 16884 conditions per place. [2023-08-26 12:36:29,668 INFO L140 encePairwiseOnDemand]: 400/406 looper letters, 69 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-26 12:36:29,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 337 flow [2023-08-26 12:36:29,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:36:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:36:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 648 transitions. [2023-08-26 12:36:29,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39901477832512317 [2023-08-26 12:36:29,670 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 648 transitions. [2023-08-26 12:36:29,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 648 transitions. [2023-08-26 12:36:29,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:29,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 648 transitions. [2023-08-26 12:36:29,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 162.0) internal successors, (648), 4 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:29,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:29,673 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:29,673 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 134 flow. Second operand 4 states and 648 transitions. [2023-08-26 12:36:29,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 337 flow [2023-08-26 12:36:29,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 78 transitions, 334 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:36:29,676 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 127 flow [2023-08-26 12:36:29,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-26 12:36:29,676 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -24 predicate places. [2023-08-26 12:36:29,676 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 127 flow [2023-08-26 12:36:29,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:29,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:29,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:36:29,681 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 12:36:29,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:29,881 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:36:29,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:29,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1244621051, now seen corresponding path program 1 times [2023-08-26 12:36:29,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:29,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295444970] [2023-08-26 12:36:29,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:29,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-26 12:36:29,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:29,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295444970] [2023-08-26 12:36:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295444970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:36:29,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125184066] [2023-08-26 12:36:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:29,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:36:29,951 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 12:36:29,953 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 12:36:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:30,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 12:36:30,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:36:30,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:36:30,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:36:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 12:36:30,084 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:36:30,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125184066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:30,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:36:30,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 12:36:30,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356298981] [2023-08-26 12:36:30,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:30,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:36:30,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:30,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:36:30,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:36:30,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 406 [2023-08-26 12:36:30,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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 12:36:30,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:30,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 406 [2023-08-26 12:36:30,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:36:30,824 INFO L124 PetriNetUnfolderBase]: 11368/16585 cut-off events. [2023-08-26 12:36:30,825 INFO L125 PetriNetUnfolderBase]: For 2409/2409 co-relation queries the response was YES. [2023-08-26 12:36:30,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36682 conditions, 16585 events. 11368/16585 cut-off events. For 2409/2409 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 101301 event pairs, 1008 based on Foata normal form. 0/15373 useless extension candidates. Maximal degree in co-relation 31946. Up to 14560 conditions per place. [2023-08-26 12:36:30,893 INFO L140 encePairwiseOnDemand]: 402/406 looper letters, 58 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2023-08-26 12:36:30,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 67 transitions, 290 flow [2023-08-26 12:36:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:36:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:36:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 644 transitions. [2023-08-26 12:36:30,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39655172413793105 [2023-08-26 12:36:30,895 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 644 transitions. [2023-08-26 12:36:30,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 644 transitions. [2023-08-26 12:36:30,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:36:30,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 644 transitions. [2023-08-26 12:36:30,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:30,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:30,899 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 406.0) internal successors, (2030), 5 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:30,899 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 127 flow. Second operand 4 states and 644 transitions. [2023-08-26 12:36:30,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 67 transitions, 290 flow [2023-08-26 12:36:30,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:36:30,902 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 124 flow [2023-08-26 12:36:30,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=406, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-08-26 12:36:30,902 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -25 predicate places. [2023-08-26 12:36:30,902 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 124 flow [2023-08-26 12:36:30,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 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 12:36:30,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:30,902 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 12:36:30,914 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 12:36:31,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:36:31,106 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2023-08-26 12:36:31,107 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:31,107 INFO L85 PathProgramCache]: Analyzing trace with hash -81832512, now seen corresponding path program 1 times [2023-08-26 12:36:31,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:31,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528978630] [2023-08-26 12:36:31,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:31,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:36:31,117 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:36:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:36:31,124 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:36:31,125 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (39 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (32 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 40 remaining) [2023-08-26 12:36:31,125 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 40 remaining) [2023-08-26 12:36:31,126 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 40 remaining) [2023-08-26 12:36:31,127 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 40 remaining) [2023-08-26 12:36:31,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 12:36:31,127 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:36:31,128 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:36:31,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 12:36:31,146 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 12:36:31,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 266 transitions, 576 flow [2023-08-26 12:36:31,192 INFO L124 PetriNetUnfolderBase]: 86/685 cut-off events. [2023-08-26 12:36:31,192 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:36:31,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 685 events. 86/685 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3050 event pairs, 6 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 475. Up to 32 conditions per place. [2023-08-26 12:36:31,195 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 266 transitions, 576 flow [2023-08-26 12:36:31,198 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 266 transitions, 576 flow [2023-08-26 12:36:31,198 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:36:31,198 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 266 transitions, 576 flow [2023-08-26 12:36:31,198 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 266 transitions, 576 flow [2023-08-26 12:36:31,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 266 transitions, 576 flow [2023-08-26 12:36:31,242 INFO L124 PetriNetUnfolderBase]: 86/685 cut-off events. [2023-08-26 12:36:31,242 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:36:31,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 685 events. 86/685 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3050 event pairs, 6 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 475. Up to 32 conditions per place. [2023-08-26 12:36:31,255 INFO L119 LiptonReduction]: Number of co-enabled transitions 40344 [2023-08-26 12:36:34,229 INFO L134 LiptonReduction]: Checked pairs total: 125542 [2023-08-26 12:36:34,229 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-08-26 12:36:34,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:36:34,233 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;@301874bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:36:34,233 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-26 12:36:34,233 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:36:34,233 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 12:36:34,233 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:36:34,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:36:34,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:36:34,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 12:36:34,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:36:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash 60365, now seen corresponding path program 1 times [2023-08-26 12:36:34,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:36:34,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107103926] [2023-08-26 12:36:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:36:34,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:36:34,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:36:34,277 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 12:36:34,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:36:34,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107103926] [2023-08-26 12:36:34,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107103926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:36:34,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:36:34,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:36:34,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852995240] [2023-08-26 12:36:34,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:36:34,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:36:34,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:36:34,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:36:34,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:36:34,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 488 [2023-08-26 12:36:34,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:36:34,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:36:34,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 488 [2023-08-26 12:36:34,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand