/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/pthread-ext/35_double_lock_p3_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:52:27,811 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:52:27,894 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 11:52:27,899 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:52:27,900 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:52:27,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:52:27,931 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:52:27,931 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:52:27,932 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:52:27,935 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:52:27,936 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:52:27,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:52:27,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:52:27,937 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:52:27,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:52:27,938 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:52:27,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:52:27,938 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:52:27,938 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:52:27,939 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:52:27,939 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:52:27,940 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:52:27,940 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:52:27,940 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:52:27,941 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:52:27,941 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:52:27,941 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:52:27,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:52:27,942 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:52:27,942 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:52:27,943 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:52:27,943 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:52:27,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:52:27,943 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:52:27,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:52:27,944 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:52:28,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:52:28,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:52:28,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:52:28,290 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:52:28,290 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:52:28,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-26 11:52:29,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:52:29,766 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:52:29,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-26 11:52:29,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c3c90f5/b9308911f7f24abca011c426bd20a7b9/FLAG90f85bf32 [2023-08-26 11:52:29,791 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c3c90f5/b9308911f7f24abca011c426bd20a7b9 [2023-08-26 11:52:29,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:52:29,794 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:52:29,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:52:29,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:52:29,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:52:29,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:52:29" (1/1) ... [2023-08-26 11:52:29,799 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a50bb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:29, skipping insertion in model container [2023-08-26 11:52:29,799 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:52:29" (1/1) ... [2023-08-26 11:52:29,833 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:52:30,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:52:30,182 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:52:30,211 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 11:52:30,212 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-26 11:52:30,232 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:52:30,269 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:52:30,270 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30 WrapperNode [2023-08-26 11:52:30,270 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:52:30,271 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:52:30,271 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:52:30,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:52:30,278 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,304 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,334 INFO L138 Inliner]: procedures = 172, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 129 [2023-08-26 11:52:30,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:52:30,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:52:30,336 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:52:30,336 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:52:30,343 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,365 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,370 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,372 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,382 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,383 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,386 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:52:30,387 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:52:30,387 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:52:30,387 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:52:30,395 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (1/1) ... [2023-08-26 11:52:30,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:52:30,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:52:30,426 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 11:52:30,456 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 11:52:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:52:30,473 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-26 11:52:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-26 11:52:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 11:52:30,474 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 11:52:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:52:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:52:30,474 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:52:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:52:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:52:30,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:52:30,475 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:52:30,477 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 11:52:30,606 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:52:30,607 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:52:30,962 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:52:31,130 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:52:31,131 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:52:31,133 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:52:31 BoogieIcfgContainer [2023-08-26 11:52:31,133 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:52:31,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:52:31,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:52:31,138 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:52:31,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:52:29" (1/3) ... [2023-08-26 11:52:31,139 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4207d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:52:31, skipping insertion in model container [2023-08-26 11:52:31,139 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:52:30" (2/3) ... [2023-08-26 11:52:31,140 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d4207d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:52:31, skipping insertion in model container [2023-08-26 11:52:31,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:52:31" (3/3) ... [2023-08-26 11:52:31,141 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-08-26 11:52:31,157 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:52:31,158 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2023-08-26 11:52:31,158 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:52:31,230 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:52:31,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 108 transitions, 226 flow [2023-08-26 11:52:31,327 INFO L124 PetriNetUnfolderBase]: 7/119 cut-off events. [2023-08-26 11:52:31,328 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:52:31,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 119 events. 7/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 267 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 101. Up to 4 conditions per place. [2023-08-26 11:52:31,335 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 108 transitions, 226 flow [2023-08-26 11:52:31,340 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 107 transitions, 222 flow [2023-08-26 11:52:31,344 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:52:31,356 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 107 transitions, 222 flow [2023-08-26 11:52:31,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 107 transitions, 222 flow [2023-08-26 11:52:31,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 107 transitions, 222 flow [2023-08-26 11:52:31,391 INFO L124 PetriNetUnfolderBase]: 7/119 cut-off events. [2023-08-26 11:52:31,391 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:52:31,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 119 events. 7/119 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 267 event pairs, 0 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 101. Up to 4 conditions per place. [2023-08-26 11:52:31,396 INFO L119 LiptonReduction]: Number of co-enabled transitions 4340 [2023-08-26 11:52:34,348 INFO L134 LiptonReduction]: Checked pairs total: 9685 [2023-08-26 11:52:34,348 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-26 11:52:34,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:52:34,372 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;@52145046, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:52:34,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 56 error locations. [2023-08-26 11:52:34,373 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:52:34,373 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:52:34,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:52:34,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:34,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:52:34,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-26 11:52:34,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:34,379 INFO L85 PathProgramCache]: Analyzing trace with hash 647, now seen corresponding path program 1 times [2023-08-26 11:52:34,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:34,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392845350] [2023-08-26 11:52:34,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:34,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:34,480 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 11:52:34,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:34,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392845350] [2023-08-26 11:52:34,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392845350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:34,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:34,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:52:34,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485382217] [2023-08-26 11:52:34,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:34,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:52:34,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:34,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:52:34,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:52:34,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 204 [2023-08-26 11:52:34,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 114 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:34,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:34,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 204 [2023-08-26 11:52:34,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:34,824 INFO L124 PetriNetUnfolderBase]: 1600/2441 cut-off events. [2023-08-26 11:52:34,824 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 11:52:34,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4905 conditions, 2441 events. 1600/2441 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12202 event pairs, 1287 based on Foata normal form. 0/1128 useless extension candidates. Maximal degree in co-relation 4895. Up to 2411 conditions per place. [2023-08-26 11:52:34,843 INFO L140 encePairwiseOnDemand]: 186/204 looper letters, 33 selfloop transitions, 0 changer transitions 0/35 dead transitions. [2023-08-26 11:52:34,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 144 flow [2023-08-26 11:52:34,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:52:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:52:34,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 189 transitions. [2023-08-26 11:52:34,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4632352941176471 [2023-08-26 11:52:34,861 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 189 transitions. [2023-08-26 11:52:34,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 189 transitions. [2023-08-26 11:52:34,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:34,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 189 transitions. [2023-08-26 11:52:34,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 94.5) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:34,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:34,872 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 204.0) internal successors, (612), 3 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:34,874 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 114 flow. Second operand 2 states and 189 transitions. [2023-08-26 11:52:34,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 144 flow [2023-08-26 11:52:34,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 143 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:34,878 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 77 flow [2023-08-26 11:52:34,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=77, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-08-26 11:52:34,883 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -17 predicate places. [2023-08-26 11:52:34,884 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 77 flow [2023-08-26 11:52:34,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:34,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:34,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:52:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:52:34,885 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-26 11:52:34,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:34,893 INFO L85 PathProgramCache]: Analyzing trace with hash 19821035, now seen corresponding path program 1 times [2023-08-26 11:52:34,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:34,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969982059] [2023-08-26 11:52:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:34,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:35,138 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 11:52:35,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:35,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969982059] [2023-08-26 11:52:35,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969982059] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:35,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:35,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:35,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475804404] [2023-08-26 11:52:35,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:35,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:35,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:35,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:35,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 204 [2023-08-26 11:52:35,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:35,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 204 [2023-08-26 11:52:35,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:35,320 INFO L124 PetriNetUnfolderBase]: 1249/1928 cut-off events. [2023-08-26 11:52:35,321 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 11:52:35,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 1928 events. 1249/1928 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9349 event pairs, 999 based on Foata normal form. 0/975 useless extension candidates. Maximal degree in co-relation 3875. Up to 1897 conditions per place. [2023-08-26 11:52:35,334 INFO L140 encePairwiseOnDemand]: 202/204 looper letters, 31 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-26 11:52:35,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 139 flow [2023-08-26 11:52:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2023-08-26 11:52:35,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284313725490196 [2023-08-26 11:52:35,336 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2023-08-26 11:52:35,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2023-08-26 11:52:35,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:35,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2023-08-26 11:52:35,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,340 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,341 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 77 flow. Second operand 3 states and 201 transitions. [2023-08-26 11:52:35,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 139 flow [2023-08-26 11:52:35,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 139 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:52:35,342 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 77 flow [2023-08-26 11:52:35,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-08-26 11:52:35,343 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -16 predicate places. [2023-08-26 11:52:35,343 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 77 flow [2023-08-26 11:52:35,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:35,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:52:35,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:52:35,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-26 11:52:35,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:35,345 INFO L85 PathProgramCache]: Analyzing trace with hash 19821034, now seen corresponding path program 1 times [2023-08-26 11:52:35,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:35,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946878896] [2023-08-26 11:52:35,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:35,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:35,389 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 11:52:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946878896] [2023-08-26 11:52:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946878896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:35,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:35,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:35,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793708660] [2023-08-26 11:52:35,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:35,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:35,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:35,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:35,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:35,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 204 [2023-08-26 11:52:35,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:35,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 204 [2023-08-26 11:52:35,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:35,561 INFO L124 PetriNetUnfolderBase]: 898/1391 cut-off events. [2023-08-26 11:52:35,561 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 11:52:35,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2807 conditions, 1391 events. 898/1391 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6232 event pairs, 711 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 2802. Up to 1384 conditions per place. [2023-08-26 11:52:35,569 INFO L140 encePairwiseOnDemand]: 202/204 looper letters, 30 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 11:52:35,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 137 flow [2023-08-26 11:52:35,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:35,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 197 transitions. [2023-08-26 11:52:35,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32189542483660133 [2023-08-26 11:52:35,571 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 197 transitions. [2023-08-26 11:52:35,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 197 transitions. [2023-08-26 11:52:35,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:35,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 197 transitions. [2023-08-26 11:52:35,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,574 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,574 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 77 flow. Second operand 3 states and 197 transitions. [2023-08-26 11:52:35,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 137 flow [2023-08-26 11:52:35,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:35,575 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 76 flow [2023-08-26 11:52:35,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-26 11:52:35,576 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -16 predicate places. [2023-08-26 11:52:35,576 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 76 flow [2023-08-26 11:52:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:35,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:52:35,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:52:35,577 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-26 11:52:35,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash 19819154, now seen corresponding path program 1 times [2023-08-26 11:52:35,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:35,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424758896] [2023-08-26 11:52:35,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:35,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:35,676 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 11:52:35,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:35,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424758896] [2023-08-26 11:52:35,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424758896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:35,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:35,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:35,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253439351] [2023-08-26 11:52:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:35,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:35,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:35,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:35,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 204 [2023-08-26 11:52:35,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:35,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 204 [2023-08-26 11:52:35,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:35,782 INFO L124 PetriNetUnfolderBase]: 517/817 cut-off events. [2023-08-26 11:52:35,782 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 11:52:35,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1656 conditions, 817 events. 517/817 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3264 event pairs, 413 based on Foata normal form. 21/565 useless extension candidates. Maximal degree in co-relation 1651. Up to 811 conditions per place. [2023-08-26 11:52:35,786 INFO L140 encePairwiseOnDemand]: 197/204 looper letters, 24 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-26 11:52:35,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 27 transitions, 114 flow [2023-08-26 11:52:35,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:35,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-26 11:52:35,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3300653594771242 [2023-08-26 11:52:35,788 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-26 11:52:35,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-26 11:52:35,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:35,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-26 11:52:35,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,792 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 76 flow. Second operand 3 states and 202 transitions. [2023-08-26 11:52:35,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 27 transitions, 114 flow [2023-08-26 11:52:35,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 27 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:35,794 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 65 flow [2023-08-26 11:52:35,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-08-26 11:52:35,796 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -21 predicate places. [2023-08-26 11:52:35,796 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 65 flow [2023-08-26 11:52:35,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:35,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:52:35,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:52:35,797 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-26 11:52:35,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash 19819155, now seen corresponding path program 1 times [2023-08-26 11:52:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:35,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451255599] [2023-08-26 11:52:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:35,883 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 11:52:35,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:35,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451255599] [2023-08-26 11:52:35,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451255599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:35,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:35,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:35,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471341982] [2023-08-26 11:52:35,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:35,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:35,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:35,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:35,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:35,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 204 [2023-08-26 11:52:35,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:35,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 204 [2023-08-26 11:52:35,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:35,947 INFO L124 PetriNetUnfolderBase]: 265/435 cut-off events. [2023-08-26 11:52:35,947 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 11:52:35,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 435 events. 265/435 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1491 event pairs, 217 based on Foata normal form. 0/371 useless extension candidates. Maximal degree in co-relation 884. Up to 430 conditions per place. [2023-08-26 11:52:35,950 INFO L140 encePairwiseOnDemand]: 198/204 looper letters, 19 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 11:52:35,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 95 flow [2023-08-26 11:52:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-26 11:52:35,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3300653594771242 [2023-08-26 11:52:35,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-26 11:52:35,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-26 11:52:35,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:35,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-26 11:52:35,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,954 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,954 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 65 flow. Second operand 3 states and 202 transitions. [2023-08-26 11:52:35,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 95 flow [2023-08-26 11:52:35,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:35,955 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 56 flow [2023-08-26 11:52:35,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-26 11:52:35,956 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -25 predicate places. [2023-08-26 11:52:35,956 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 56 flow [2023-08-26 11:52:35,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:35,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:52:35,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:52:35,957 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-26 11:52:35,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:35,957 INFO L85 PathProgramCache]: Analyzing trace with hash 614394481, now seen corresponding path program 1 times [2023-08-26 11:52:35,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:35,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204042986] [2023-08-26 11:52:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:35,982 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 11:52:35,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204042986] [2023-08-26 11:52:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204042986] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:35,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:35,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:35,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131773482] [2023-08-26 11:52:35,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:35,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:35,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:35,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:35,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:35,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 204 [2023-08-26 11:52:35,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:35,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:35,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 204 [2023-08-26 11:52:35,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:36,048 INFO L124 PetriNetUnfolderBase]: 257/429 cut-off events. [2023-08-26 11:52:36,049 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:52:36,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 429 events. 257/429 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1474 event pairs, 69 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 871. Up to 318 conditions per place. [2023-08-26 11:52:36,051 INFO L140 encePairwiseOnDemand]: 201/204 looper letters, 23 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-26 11:52:36,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 116 flow [2023-08-26 11:52:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-08-26 11:52:36,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32679738562091504 [2023-08-26 11:52:36,053 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-08-26 11:52:36,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-08-26 11:52:36,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:36,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-08-26 11:52:36,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:36,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:36,055 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:36,055 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 56 flow. Second operand 3 states and 200 transitions. [2023-08-26 11:52:36,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 116 flow [2023-08-26 11:52:36,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:36,057 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 63 flow [2023-08-26 11:52:36,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=3, PETRI_FLOW=63, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-26 11:52:36,057 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -23 predicate places. [2023-08-26 11:52:36,058 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 63 flow [2023-08-26 11:52:36,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:36,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:36,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-26 11:52:36,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:52:36,058 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 53 more)] === [2023-08-26 11:52:36,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:36,059 INFO L85 PathProgramCache]: Analyzing trace with hash 8441853, now seen corresponding path program 1 times [2023-08-26 11:52:36,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:36,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909305446] [2023-08-26 11:52:36,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:36,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:36,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:52:36,069 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:52:36,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:52:36,091 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:52:36,091 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:52:36,092 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (55 of 56 remaining) [2023-08-26 11:52:36,093 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 56 remaining) [2023-08-26 11:52:36,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 56 remaining) [2023-08-26 11:52:36,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 56 remaining) [2023-08-26 11:52:36,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 56 remaining) [2023-08-26 11:52:36,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 56 remaining) [2023-08-26 11:52:36,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 56 remaining) [2023-08-26 11:52:36,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 56 remaining) [2023-08-26 11:52:36,094 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 56 remaining) [2023-08-26 11:52:36,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 56 remaining) [2023-08-26 11:52:36,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 56 remaining) [2023-08-26 11:52:36,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 56 remaining) [2023-08-26 11:52:36,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 56 remaining) [2023-08-26 11:52:36,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 56 remaining) [2023-08-26 11:52:36,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 56 remaining) [2023-08-26 11:52:36,095 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 56 remaining) [2023-08-26 11:52:36,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 56 remaining) [2023-08-26 11:52:36,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 56 remaining) [2023-08-26 11:52:36,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 56 remaining) [2023-08-26 11:52:36,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 56 remaining) [2023-08-26 11:52:36,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 56 remaining) [2023-08-26 11:52:36,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 56 remaining) [2023-08-26 11:52:36,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 56 remaining) [2023-08-26 11:52:36,096 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 56 remaining) [2023-08-26 11:52:36,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 56 remaining) [2023-08-26 11:52:36,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (30 of 56 remaining) [2023-08-26 11:52:36,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 56 remaining) [2023-08-26 11:52:36,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 56 remaining) [2023-08-26 11:52:36,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 56 remaining) [2023-08-26 11:52:36,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 56 remaining) [2023-08-26 11:52:36,097 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (25 of 56 remaining) [2023-08-26 11:52:36,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 56 remaining) [2023-08-26 11:52:36,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 56 remaining) [2023-08-26 11:52:36,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 56 remaining) [2023-08-26 11:52:36,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 56 remaining) [2023-08-26 11:52:36,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 56 remaining) [2023-08-26 11:52:36,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 56 remaining) [2023-08-26 11:52:36,098 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 56 remaining) [2023-08-26 11:52:36,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 56 remaining) [2023-08-26 11:52:36,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 56 remaining) [2023-08-26 11:52:36,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 56 remaining) [2023-08-26 11:52:36,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 56 remaining) [2023-08-26 11:52:36,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 56 remaining) [2023-08-26 11:52:36,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 56 remaining) [2023-08-26 11:52:36,099 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 56 remaining) [2023-08-26 11:52:36,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 56 remaining) [2023-08-26 11:52:36,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 56 remaining) [2023-08-26 11:52:36,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 56 remaining) [2023-08-26 11:52:36,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 56 remaining) [2023-08-26 11:52:36,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 56 remaining) [2023-08-26 11:52:36,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 56 remaining) [2023-08-26 11:52:36,100 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 56 remaining) [2023-08-26 11:52:36,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 56 remaining) [2023-08-26 11:52:36,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 56 remaining) [2023-08-26 11:52:36,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 56 remaining) [2023-08-26 11:52:36,101 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (0 of 56 remaining) [2023-08-26 11:52:36,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:52:36,102 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:52:36,104 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:52:36,104 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 11:52:36,168 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:52:36,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 178 transitions, 380 flow [2023-08-26 11:52:36,212 INFO L124 PetriNetUnfolderBase]: 9/177 cut-off events. [2023-08-26 11:52:36,212 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:52:36,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 177 events. 9/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 529 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 186. Up to 6 conditions per place. [2023-08-26 11:52:36,214 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 178 transitions, 380 flow [2023-08-26 11:52:36,217 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 151 transitions, 317 flow [2023-08-26 11:52:36,217 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:52:36,217 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 151 transitions, 317 flow [2023-08-26 11:52:36,217 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 151 transitions, 317 flow [2023-08-26 11:52:36,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 151 transitions, 317 flow [2023-08-26 11:52:36,238 INFO L124 PetriNetUnfolderBase]: 9/177 cut-off events. [2023-08-26 11:52:36,239 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:52:36,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 177 events. 9/177 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 528 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 163. Up to 6 conditions per place. [2023-08-26 11:52:36,246 INFO L119 LiptonReduction]: Number of co-enabled transitions 11614 [2023-08-26 11:52:39,665 INFO L134 LiptonReduction]: Checked pairs total: 40341 [2023-08-26 11:52:39,665 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-08-26 11:52:39,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:52:39,667 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;@52145046, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:52:39,667 INFO L358 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2023-08-26 11:52:39,668 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:52:39,668 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:52:39,668 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:52:39,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:39,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:52:39,668 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:39,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1026, now seen corresponding path program 1 times [2023-08-26 11:52:39,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:39,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658099091] [2023-08-26 11:52:39,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:39,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:39,678 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 11:52:39,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:39,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658099091] [2023-08-26 11:52:39,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658099091] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:39,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:39,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:52:39,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543272657] [2023-08-26 11:52:39,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:39,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:52:39,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:39,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:52:39,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:52:39,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 310 [2023-08-26 11:52:39,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 189 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:39,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:39,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 310 [2023-08-26 11:52:39,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:42,864 INFO L124 PetriNetUnfolderBase]: 25301/37247 cut-off events. [2023-08-26 11:52:42,865 INFO L125 PetriNetUnfolderBase]: For 501/501 co-relation queries the response was YES. [2023-08-26 11:52:42,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71834 conditions, 37247 events. 25301/37247 cut-off events. For 501/501 co-relation queries the response was YES. Maximal size of possible extension queue 1699. Compared 275679 event pairs, 21292 based on Foata normal form. 0/17546 useless extension candidates. Maximal degree in co-relation 71823. Up to 33987 conditions per place. [2023-08-26 11:52:43,313 INFO L140 encePairwiseOnDemand]: 283/310 looper letters, 46 selfloop transitions, 0 changer transitions 0/60 dead transitions. [2023-08-26 11:52:43,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 227 flow [2023-08-26 11:52:43,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:52:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:52:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 277 transitions. [2023-08-26 11:52:43,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4467741935483871 [2023-08-26 11:52:43,316 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 277 transitions. [2023-08-26 11:52:43,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 277 transitions. [2023-08-26 11:52:43,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:43,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 277 transitions. [2023-08-26 11:52:43,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 138.5) internal successors, (277), 2 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:43,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:43,320 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:43,320 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 189 flow. Second operand 2 states and 277 transitions. [2023-08-26 11:52:43,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 227 flow [2023-08-26 11:52:43,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:43,326 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 132 flow [2023-08-26 11:52:43,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=132, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2023-08-26 11:52:43,327 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -26 predicate places. [2023-08-26 11:52:43,327 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 132 flow [2023-08-26 11:52:43,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:43,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:43,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:52:43,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:52:43,328 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:43,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:43,329 INFO L85 PathProgramCache]: Analyzing trace with hash 31392377, now seen corresponding path program 1 times [2023-08-26 11:52:43,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:43,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453598975] [2023-08-26 11:52:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:43,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:43,365 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 11:52:43,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:43,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453598975] [2023-08-26 11:52:43,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453598975] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:43,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:43,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:43,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196932613] [2023-08-26 11:52:43,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:43,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:43,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:43,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:43,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:43,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 310 [2023-08-26 11:52:43,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:43,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:43,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 310 [2023-08-26 11:52:43,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:45,421 INFO L124 PetriNetUnfolderBase]: 18474/27492 cut-off events. [2023-08-26 11:52:45,422 INFO L125 PetriNetUnfolderBase]: For 429/429 co-relation queries the response was YES. [2023-08-26 11:52:45,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53011 conditions, 27492 events. 18474/27492 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 1210. Compared 197908 event pairs, 15467 based on Foata normal form. 0/13714 useless extension candidates. Maximal degree in co-relation 53006. Up to 24990 conditions per place. [2023-08-26 11:52:45,600 INFO L140 encePairwiseOnDemand]: 308/310 looper letters, 44 selfloop transitions, 1 changer transitions 0/59 dead transitions. [2023-08-26 11:52:45,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 220 flow [2023-08-26 11:52:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:45,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-26 11:52:45,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-26 11:52:45,602 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-26 11:52:45,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-26 11:52:45,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:45,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-26 11:52:45,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:45,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:45,605 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:45,605 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 132 flow. Second operand 3 states and 310 transitions. [2023-08-26 11:52:45,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 220 flow [2023-08-26 11:52:45,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 59 transitions, 220 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:52:45,608 INFO L231 Difference]: Finished difference. Result has 66 places, 59 transitions, 132 flow [2023-08-26 11:52:45,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=66, PETRI_TRANSITIONS=59} [2023-08-26 11:52:45,611 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -25 predicate places. [2023-08-26 11:52:45,611 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 59 transitions, 132 flow [2023-08-26 11:52:45,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:45,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:45,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:52:45,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:52:45,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:45,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:45,612 INFO L85 PathProgramCache]: Analyzing trace with hash 31392375, now seen corresponding path program 1 times [2023-08-26 11:52:45,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:45,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113844785] [2023-08-26 11:52:45,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:45,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:45,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:45,642 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 11:52:45,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:45,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113844785] [2023-08-26 11:52:45,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113844785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:45,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:45,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:45,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132194527] [2023-08-26 11:52:45,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:45,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:45,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:45,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:45,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 310 [2023-08-26 11:52:45,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:45,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:45,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 310 [2023-08-26 11:52:45,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:46,843 INFO L124 PetriNetUnfolderBase]: 11647/17737 cut-off events. [2023-08-26 11:52:46,843 INFO L125 PetriNetUnfolderBase]: For 429/429 co-relation queries the response was YES. [2023-08-26 11:52:46,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34262 conditions, 17737 events. 11647/17737 cut-off events. For 429/429 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 123069 event pairs, 9642 based on Foata normal form. 0/9882 useless extension candidates. Maximal degree in co-relation 34256. Up to 15994 conditions per place. [2023-08-26 11:52:46,978 INFO L140 encePairwiseOnDemand]: 308/310 looper letters, 43 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-08-26 11:52:46,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 218 flow [2023-08-26 11:52:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:46,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 312 transitions. [2023-08-26 11:52:46,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2023-08-26 11:52:46,980 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 312 transitions. [2023-08-26 11:52:46,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 312 transitions. [2023-08-26 11:52:46,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:46,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 312 transitions. [2023-08-26 11:52:46,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:46,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:46,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:46,983 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 132 flow. Second operand 3 states and 312 transitions. [2023-08-26 11:52:46,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 218 flow [2023-08-26 11:52:46,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 58 transitions, 217 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:46,985 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 131 flow [2023-08-26 11:52:46,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2023-08-26 11:52:46,986 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -25 predicate places. [2023-08-26 11:52:46,986 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 131 flow [2023-08-26 11:52:46,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:46,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:46,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:52:46,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:52:46,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:46,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:46,987 INFO L85 PathProgramCache]: Analyzing trace with hash 31389954, now seen corresponding path program 1 times [2023-08-26 11:52:46,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:46,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562936810] [2023-08-26 11:52:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:46,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:47,033 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 11:52:47,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:47,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562936810] [2023-08-26 11:52:47,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562936810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:47,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:47,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:47,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255762650] [2023-08-26 11:52:47,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:47,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:47,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:47,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:47,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:47,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 310 [2023-08-26 11:52:47,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:47,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:47,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 310 [2023-08-26 11:52:47,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:47,700 INFO L124 PetriNetUnfolderBase]: 4823/7804 cut-off events. [2023-08-26 11:52:47,701 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2023-08-26 11:52:47,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14821 conditions, 7804 events. 4823/7804 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 51945 event pairs, 3968 based on Foata normal form. 0/5486 useless extension candidates. Maximal degree in co-relation 14815. Up to 6692 conditions per place. [2023-08-26 11:52:47,735 INFO L140 encePairwiseOnDemand]: 299/310 looper letters, 33 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-26 11:52:47,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 179 flow [2023-08-26 11:52:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:47,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2023-08-26 11:52:47,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33763440860215055 [2023-08-26 11:52:47,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2023-08-26 11:52:47,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2023-08-26 11:52:47,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:47,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2023-08-26 11:52:47,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:47,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:47,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:47,740 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 131 flow. Second operand 3 states and 314 transitions. [2023-08-26 11:52:47,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 179 flow [2023-08-26 11:52:47,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 48 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:47,742 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 112 flow [2023-08-26 11:52:47,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-08-26 11:52:47,742 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -34 predicate places. [2023-08-26 11:52:47,742 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 112 flow [2023-08-26 11:52:47,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.0) internal successors, (273), 3 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:47,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:47,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:52:47,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:52:47,743 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:47,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 31389950, now seen corresponding path program 1 times [2023-08-26 11:52:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:47,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299717982] [2023-08-26 11:52:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:47,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:47,802 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 11:52:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:47,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299717982] [2023-08-26 11:52:47,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299717982] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:47,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:47,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335048935] [2023-08-26 11:52:47,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:47,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:47,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:47,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 310 [2023-08-26 11:52:47,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:47,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:47,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 310 [2023-08-26 11:52:47,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:48,072 INFO L124 PetriNetUnfolderBase]: 1770/3111 cut-off events. [2023-08-26 11:52:48,072 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-08-26 11:52:48,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5797 conditions, 3111 events. 1770/3111 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19120 event pairs, 1453 based on Foata normal form. 170/2839 useless extension candidates. Maximal degree in co-relation 5791. Up to 2505 conditions per place. [2023-08-26 11:52:48,090 INFO L140 encePairwiseOnDemand]: 301/310 looper letters, 25 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 11:52:48,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 148 flow [2023-08-26 11:52:48,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:48,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-08-26 11:52:48,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-26 11:52:48,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-08-26 11:52:48,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-08-26 11:52:48,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:48,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-08-26 11:52:48,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,095 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 112 flow. Second operand 3 states and 310 transitions. [2023-08-26 11:52:48,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 148 flow [2023-08-26 11:52:48,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:48,098 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 97 flow [2023-08-26 11:52:48,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2023-08-26 11:52:48,098 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -41 predicate places. [2023-08-26 11:52:48,099 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 97 flow [2023-08-26 11:52:48,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:48,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:52:48,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:52:48,100 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:48,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash 973089499, now seen corresponding path program 1 times [2023-08-26 11:52:48,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:48,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489322194] [2023-08-26 11:52:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:48,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:48,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:48,121 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 11:52:48,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:48,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489322194] [2023-08-26 11:52:48,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489322194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:48,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:48,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:52:48,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268637305] [2023-08-26 11:52:48,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:48,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:52:48,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:52:48,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:52:48,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 310 [2023-08-26 11:52:48,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:48,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 310 [2023-08-26 11:52:48,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:48,527 INFO L124 PetriNetUnfolderBase]: 4526/6451 cut-off events. [2023-08-26 11:52:48,528 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2023-08-26 11:52:48,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13083 conditions, 6451 events. 4526/6451 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34574 event pairs, 1323 based on Foata normal form. 0/5798 useless extension candidates. Maximal degree in co-relation 13077. Up to 5903 conditions per place. [2023-08-26 11:52:48,562 INFO L140 encePairwiseOnDemand]: 306/310 looper letters, 46 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-26 11:52:48,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 226 flow [2023-08-26 11:52:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:52:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:52:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-08-26 11:52:48,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3150537634408602 [2023-08-26 11:52:48,564 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-08-26 11:52:48,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-08-26 11:52:48,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:48,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-08-26 11:52:48,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,567 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 310.0) internal successors, (1240), 4 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,567 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 97 flow. Second operand 3 states and 293 transitions. [2023-08-26 11:52:48,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 226 flow [2023-08-26 11:52:48,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 53 transitions, 225 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:48,568 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 115 flow [2023-08-26 11:52:48,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-26 11:52:48,569 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -39 predicate places. [2023-08-26 11:52:48,569 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 115 flow [2023-08-26 11:52:48,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:48,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:52:48,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:52:48,570 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:48,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:48,570 INFO L85 PathProgramCache]: Analyzing trace with hash -404265371, now seen corresponding path program 1 times [2023-08-26 11:52:48,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:48,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006520829] [2023-08-26 11:52:48,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:48,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:48,613 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 11:52:48,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:48,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006520829] [2023-08-26 11:52:48,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006520829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:48,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:48,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:52:48,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273437885] [2023-08-26 11:52:48,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:48,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:52:48,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:52:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:52:48,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 310 [2023-08-26 11:52:48,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 115 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:48,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:48,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 310 [2023-08-26 11:52:48,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:49,311 INFO L124 PetriNetUnfolderBase]: 5164/7361 cut-off events. [2023-08-26 11:52:49,311 INFO L125 PetriNetUnfolderBase]: For 792/792 co-relation queries the response was YES. [2023-08-26 11:52:49,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15691 conditions, 7361 events. 5164/7361 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 41255 event pairs, 1155 based on Foata normal form. 56/7116 useless extension candidates. Maximal degree in co-relation 15684. Up to 5773 conditions per place. [2023-08-26 11:52:49,351 INFO L140 encePairwiseOnDemand]: 301/310 looper letters, 82 selfloop transitions, 11 changer transitions 0/97 dead transitions. [2023-08-26 11:52:49,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 97 transitions, 435 flow [2023-08-26 11:52:49,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:52:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:52:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 568 transitions. [2023-08-26 11:52:49,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3053763440860215 [2023-08-26 11:52:49,355 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 568 transitions. [2023-08-26 11:52:49,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 568 transitions. [2023-08-26 11:52:49,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:49,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 568 transitions. [2023-08-26 11:52:49,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 94.66666666666667) internal successors, (568), 6 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:49,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:49,365 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 310.0) internal successors, (2170), 7 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:49,365 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 115 flow. Second operand 6 states and 568 transitions. [2023-08-26 11:52:49,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 97 transitions, 435 flow [2023-08-26 11:52:49,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 97 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:52:49,370 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 184 flow [2023-08-26 11:52:49,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2023-08-26 11:52:49,372 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -32 predicate places. [2023-08-26 11:52:49,372 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 184 flow [2023-08-26 11:52:49,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:49,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:49,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:52:49,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:52:49,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:49,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1952101420, now seen corresponding path program 1 times [2023-08-26 11:52:49,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:49,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043662120] [2023-08-26 11:52:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:49,450 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 11:52:49,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:49,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043662120] [2023-08-26 11:52:49,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043662120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:49,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:49,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:52:49,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661692013] [2023-08-26 11:52:49,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:49,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:52:49,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:49,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:52:49,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:52:49,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 310 [2023-08-26 11:52:49,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:49,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:49,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 310 [2023-08-26 11:52:49,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:52:50,210 INFO L124 PetriNetUnfolderBase]: 6200/8877 cut-off events. [2023-08-26 11:52:50,210 INFO L125 PetriNetUnfolderBase]: For 2594/2594 co-relation queries the response was YES. [2023-08-26 11:52:50,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20781 conditions, 8877 events. 6200/8877 cut-off events. For 2594/2594 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 51923 event pairs, 1577 based on Foata normal form. 112/8684 useless extension candidates. Maximal degree in co-relation 20771. Up to 5307 conditions per place. [2023-08-26 11:52:50,252 INFO L140 encePairwiseOnDemand]: 299/310 looper letters, 118 selfloop transitions, 22 changer transitions 0/144 dead transitions. [2023-08-26 11:52:50,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 144 transitions, 718 flow [2023-08-26 11:52:50,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:52:50,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:52:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 764 transitions. [2023-08-26 11:52:50,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30806451612903224 [2023-08-26 11:52:50,255 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 764 transitions. [2023-08-26 11:52:50,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 764 transitions. [2023-08-26 11:52:50,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:52:50,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 764 transitions. [2023-08-26 11:52:50,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.5) internal successors, (764), 8 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:50,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 310.0) internal successors, (2790), 9 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:50,261 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 310.0) internal successors, (2790), 9 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:50,261 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 184 flow. Second operand 8 states and 764 transitions. [2023-08-26 11:52:50,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 144 transitions, 718 flow [2023-08-26 11:52:50,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 144 transitions, 699 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 11:52:50,271 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 295 flow [2023-08-26 11:52:50,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=310, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=295, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2023-08-26 11:52:50,272 INFO L281 CegarLoopForPetriNet]: 91 programPoint places, -24 predicate places. [2023-08-26 11:52:50,272 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 295 flow [2023-08-26 11:52:50,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.0) internal successors, (480), 6 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:50,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:50,272 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 11:52:50,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:52:50,273 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2023-08-26 11:52:50,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1576922382, now seen corresponding path program 1 times [2023-08-26 11:52:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595564182] [2023-08-26 11:52:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:50,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:52:50,288 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:52:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:52:50,298 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:52:50,298 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:52:50,299 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (80 of 81 remaining) [2023-08-26 11:52:50,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 81 remaining) [2023-08-26 11:52:50,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 81 remaining) [2023-08-26 11:52:50,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 81 remaining) [2023-08-26 11:52:50,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 81 remaining) [2023-08-26 11:52:50,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 81 remaining) [2023-08-26 11:52:50,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 81 remaining) [2023-08-26 11:52:50,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 81 remaining) [2023-08-26 11:52:50,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (55 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (50 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 81 remaining) [2023-08-26 11:52:50,302 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 81 remaining) [2023-08-26 11:52:50,303 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 81 remaining) [2023-08-26 11:52:50,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 81 remaining) [2023-08-26 11:52:50,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (9 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 81 remaining) [2023-08-26 11:52:50,306 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 81 remaining) [2023-08-26 11:52:50,307 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 81 remaining) [2023-08-26 11:52:50,307 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 81 remaining) [2023-08-26 11:52:50,307 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (0 of 81 remaining) [2023-08-26 11:52:50,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:52:50,307 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:52:50,308 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:52:50,308 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 11:52:50,362 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:52:50,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 246 places, 248 transitions, 538 flow [2023-08-26 11:52:50,388 INFO L124 PetriNetUnfolderBase]: 11/235 cut-off events. [2023-08-26 11:52:50,388 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:52:50,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 235 events. 11/235 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 809 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 249. Up to 8 conditions per place. [2023-08-26 11:52:50,391 INFO L82 GeneralOperation]: Start removeDead. Operand has 246 places, 248 transitions, 538 flow [2023-08-26 11:52:50,393 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 195 transitions, 414 flow [2023-08-26 11:52:50,394 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:52:50,394 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 195 transitions, 414 flow [2023-08-26 11:52:50,394 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 195 transitions, 414 flow [2023-08-26 11:52:50,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 195 transitions, 414 flow [2023-08-26 11:52:50,417 INFO L124 PetriNetUnfolderBase]: 11/235 cut-off events. [2023-08-26 11:52:50,417 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 11:52:50,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 235 events. 11/235 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 826 event pairs, 0 based on Foata normal form. 0/153 useless extension candidates. Maximal degree in co-relation 226. Up to 8 conditions per place. [2023-08-26 11:52:50,431 INFO L119 LiptonReduction]: Number of co-enabled transitions 22672 [2023-08-26 11:52:54,698 INFO L134 LiptonReduction]: Checked pairs total: 100445 [2023-08-26 11:52:54,698 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-26 11:52:54,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:52:54,700 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;@52145046, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:52:54,700 INFO L358 AbstractCegarLoop]: Starting to check reachability of 106 error locations. [2023-08-26 11:52:54,701 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:52:54,701 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:52:54,701 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:52:54,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:52:54,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:52:54,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:52:54,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:52:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1513, now seen corresponding path program 1 times [2023-08-26 11:52:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:52:54,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235161259] [2023-08-26 11:52:54,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:52:54,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:52:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:52:54,706 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 11:52:54,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:52:54,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235161259] [2023-08-26 11:52:54,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235161259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:52:54,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:52:54,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:52:54,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548782543] [2023-08-26 11:52:54,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:52:54,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:52:54,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:52:54,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:52:54,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:52:54,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 415 [2023-08-26 11:52:54,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 258 flow. Second operand has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:52:54,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:52:54,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 415 [2023-08-26 11:52:54,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:53:47,795 INFO L124 PetriNetUnfolderBase]: 542153/718971 cut-off events. [2023-08-26 11:53:47,795 INFO L125 PetriNetUnfolderBase]: For 15626/15626 co-relation queries the response was YES. [2023-08-26 11:53:49,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1411180 conditions, 718971 events. 542153/718971 cut-off events. For 15626/15626 co-relation queries the response was YES. Maximal size of possible extension queue 22446. Compared 5701005 event pairs, 469564 based on Foata normal form. 0/338904 useless extension candidates. Maximal degree in co-relation 1411168. Up to 680439 conditions per place. [2023-08-26 11:53:52,691 INFO L140 encePairwiseOnDemand]: 379/415 looper letters, 63 selfloop transitions, 0 changer transitions 0/81 dead transitions. [2023-08-26 11:53:52,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 81 transitions, 312 flow [2023-08-26 11:53:52,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:53:52,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:53:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 369 transitions. [2023-08-26 11:53:52,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44457831325301206 [2023-08-26 11:53:52,693 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 369 transitions. [2023-08-26 11:53:52,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 369 transitions. [2023-08-26 11:53:52,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:53:52,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 369 transitions. [2023-08-26 11:53:52,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 415.0) internal successors, (1245), 3 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,695 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 415.0) internal successors, (1245), 3 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,696 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 258 flow. Second operand 2 states and 369 transitions. [2023-08-26 11:53:52,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 81 transitions, 312 flow [2023-08-26 11:53:52,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 305 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 11:53:52,710 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 179 flow [2023-08-26 11:53:52,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=179, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2023-08-26 11:53:52,711 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -35 predicate places. [2023-08-26 11:53:52,711 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 179 flow [2023-08-26 11:53:52,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:53:52,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:53:52,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:53:52,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:53:52,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:53:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 46312490, now seen corresponding path program 1 times [2023-08-26 11:53:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:53:52,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090584789] [2023-08-26 11:53:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:53:52,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:53:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:53:52,764 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 11:53:52,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:53:52,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090584789] [2023-08-26 11:53:52,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090584789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:53:52,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:53:52,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:53:52,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370844096] [2023-08-26 11:53:52,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:53:52,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:53:52,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:53:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:53:52,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:53:52,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 415 [2023-08-26 11:53:52,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 179 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:53:52,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:53:52,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 415 [2023-08-26 11:53:52,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:12,875 INFO L124 PetriNetUnfolderBase]: 217479/294091 cut-off events. [2023-08-26 11:54:12,875 INFO L125 PetriNetUnfolderBase]: For 3200/3200 co-relation queries the response was YES. [2023-08-26 11:54:13,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 572275 conditions, 294091 events. 217479/294091 cut-off events. For 3200/3200 co-relation queries the response was YES. Maximal size of possible extension queue 9577. Compared 2247562 event pairs, 187778 based on Foata normal form. 9387/171007 useless extension candidates. Maximal degree in co-relation 572269. Up to 274298 conditions per place. [2023-08-26 11:54:14,959 INFO L140 encePairwiseOnDemand]: 403/415 looper letters, 51 selfloop transitions, 1 changer transitions 0/70 dead transitions. [2023-08-26 11:54:14,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 70 transitions, 261 flow [2023-08-26 11:54:14,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:14,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-26 11:54:14,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35180722891566263 [2023-08-26 11:54:14,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-26 11:54:14,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-26 11:54:14,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:14,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-26 11:54:14,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:14,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:14,965 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:14,965 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 179 flow. Second operand 3 states and 438 transitions. [2023-08-26 11:54:14,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 70 transitions, 261 flow [2023-08-26 11:54:14,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 70 transitions, 261 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:54:14,968 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 159 flow [2023-08-26 11:54:14,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=159, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2023-08-26 11:54:14,969 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -44 predicate places. [2023-08-26 11:54:14,969 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 159 flow [2023-08-26 11:54:14,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:14,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:14,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:54:14,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 11:54:14,970 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:54:14,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:14,970 INFO L85 PathProgramCache]: Analyzing trace with hash 46312489, now seen corresponding path program 1 times [2023-08-26 11:54:14,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:14,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799461254] [2023-08-26 11:54:14,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:14,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:15,029 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 11:54:15,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:15,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799461254] [2023-08-26 11:54:15,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799461254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:15,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:15,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:15,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811567464] [2023-08-26 11:54:15,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:15,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:15,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:15,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:15,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 415 [2023-08-26 11:54:15,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:15,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:15,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 415 [2023-08-26 11:54:15,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:19,613 INFO L124 PetriNetUnfolderBase]: 47385/67739 cut-off events. [2023-08-26 11:54:19,613 INFO L125 PetriNetUnfolderBase]: For 1035/1035 co-relation queries the response was YES. [2023-08-26 11:54:19,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129409 conditions, 67739 events. 47385/67739 cut-off events. For 1035/1035 co-relation queries the response was YES. Maximal size of possible extension queue 2389. Compared 495314 event pairs, 40288 based on Foata normal form. 0/53101 useless extension candidates. Maximal degree in co-relation 129402. Up to 60370 conditions per place. [2023-08-26 11:54:19,996 INFO L140 encePairwiseOnDemand]: 400/415 looper letters, 37 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-08-26 11:54:19,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 56 transitions, 207 flow [2023-08-26 11:54:19,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-26 11:54:19,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3381526104417671 [2023-08-26 11:54:19,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-26 11:54:19,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-26 11:54:19,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:19,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-26 11:54:20,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:20,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:20,002 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:20,002 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 159 flow. Second operand 3 states and 421 transitions. [2023-08-26 11:54:20,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 56 transitions, 207 flow [2023-08-26 11:54:20,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 56 transitions, 206 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:20,004 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 132 flow [2023-08-26 11:54:20,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-08-26 11:54:20,005 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -57 predicate places. [2023-08-26 11:54:20,005 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 132 flow [2023-08-26 11:54:20,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.0) internal successors, (372), 3 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:20,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:20,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:54:20,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 11:54:20,006 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:54:20,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:20,006 INFO L85 PathProgramCache]: Analyzing trace with hash 46315692, now seen corresponding path program 1 times [2023-08-26 11:54:20,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:20,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749780421] [2023-08-26 11:54:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:20,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:20,033 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 11:54:20,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:20,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749780421] [2023-08-26 11:54:20,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749780421] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:20,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:20,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:20,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753439358] [2023-08-26 11:54:20,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:20,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:20,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:20,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:20,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:20,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 415 [2023-08-26 11:54:20,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:20,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:20,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 415 [2023-08-26 11:54:20,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:23,642 INFO L124 PetriNetUnfolderBase]: 34820/50249 cut-off events. [2023-08-26 11:54:23,642 INFO L125 PetriNetUnfolderBase]: For 1035/1035 co-relation queries the response was YES. [2023-08-26 11:54:23,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96110 conditions, 50249 events. 34820/50249 cut-off events. For 1035/1035 co-relation queries the response was YES. Maximal size of possible extension queue 1749. Compared 359200 event pairs, 29497 based on Foata normal form. 0/40730 useless extension candidates. Maximal degree in co-relation 96103. Up to 44560 conditions per place. [2023-08-26 11:54:24,002 INFO L140 encePairwiseOnDemand]: 413/415 looper letters, 36 selfloop transitions, 1 changer transitions 0/55 dead transitions. [2023-08-26 11:54:24,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 55 transitions, 204 flow [2023-08-26 11:54:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:24,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:24,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-26 11:54:24,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3244979919678715 [2023-08-26 11:54:24,005 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-26 11:54:24,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-26 11:54:24,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:24,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-26 11:54:24,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:24,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:24,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:24,008 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 132 flow. Second operand 3 states and 404 transitions. [2023-08-26 11:54:24,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 55 transitions, 204 flow [2023-08-26 11:54:24,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 203 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:24,010 INFO L231 Difference]: Finished difference. Result has 65 places, 55 transitions, 131 flow [2023-08-26 11:54:24,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=65, PETRI_TRANSITIONS=55} [2023-08-26 11:54:24,010 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -57 predicate places. [2023-08-26 11:54:24,010 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 55 transitions, 131 flow [2023-08-26 11:54:24,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:24,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:24,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:54:24,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:54:24,011 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:54:24,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash 46315691, now seen corresponding path program 1 times [2023-08-26 11:54:24,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:24,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72291805] [2023-08-26 11:54:24,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:24,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:24,049 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 11:54:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72291805] [2023-08-26 11:54:24,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72291805] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:24,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:24,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:24,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958348791] [2023-08-26 11:54:24,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:24,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:24,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:24,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:24,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:24,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 415 [2023-08-26 11:54:24,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 55 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:24,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:24,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 415 [2023-08-26 11:54:24,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:26,482 INFO L124 PetriNetUnfolderBase]: 22255/32759 cut-off events. [2023-08-26 11:54:26,482 INFO L125 PetriNetUnfolderBase]: For 1035/1035 co-relation queries the response was YES. [2023-08-26 11:54:26,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62811 conditions, 32759 events. 22255/32759 cut-off events. For 1035/1035 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 226295 event pairs, 18706 based on Foata normal form. 0/28359 useless extension candidates. Maximal degree in co-relation 62804. Up to 28750 conditions per place. [2023-08-26 11:54:26,670 INFO L140 encePairwiseOnDemand]: 413/415 looper letters, 35 selfloop transitions, 1 changer transitions 0/54 dead transitions. [2023-08-26 11:54:26,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 201 flow [2023-08-26 11:54:26,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-26 11:54:26,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.321285140562249 [2023-08-26 11:54:26,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-26 11:54:26,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-26 11:54:26,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:26,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-26 11:54:26,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:26,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:26,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:26,675 INFO L175 Difference]: Start difference. First operand has 65 places, 55 transitions, 131 flow. Second operand 3 states and 400 transitions. [2023-08-26 11:54:26,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 201 flow [2023-08-26 11:54:26,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 54 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:26,677 INFO L231 Difference]: Finished difference. Result has 65 places, 54 transitions, 130 flow [2023-08-26 11:54:26,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=65, PETRI_TRANSITIONS=54} [2023-08-26 11:54:26,677 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -57 predicate places. [2023-08-26 11:54:26,678 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 54 transitions, 130 flow [2023-08-26 11:54:26,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:26,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:26,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:54:26,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 11:54:26,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:54:26,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:26,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1435688549, now seen corresponding path program 1 times [2023-08-26 11:54:26,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:26,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405834205] [2023-08-26 11:54:26,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:26,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:26,704 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 11:54:26,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:26,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405834205] [2023-08-26 11:54:26,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405834205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:26,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:26,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:54:26,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946211022] [2023-08-26 11:54:26,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:26,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:54:26,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:26,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:54:26,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:54:26,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 415 [2023-08-26 11:54:26,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 54 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:26,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:26,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 415 [2023-08-26 11:54:26,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:33,285 INFO L124 PetriNetUnfolderBase]: 82862/107177 cut-off events. [2023-08-26 11:54:33,285 INFO L125 PetriNetUnfolderBase]: For 2754/2754 co-relation queries the response was YES. [2023-08-26 11:54:33,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216998 conditions, 107177 events. 82862/107177 cut-off events. For 2754/2754 co-relation queries the response was YES. Maximal size of possible extension queue 2968. Compared 626445 event pairs, 29321 based on Foata normal form. 0/96868 useless extension candidates. Maximal degree in co-relation 216991. Up to 104467 conditions per place. [2023-08-26 11:54:33,958 INFO L140 encePairwiseOnDemand]: 410/415 looper letters, 64 selfloop transitions, 4 changer transitions 0/72 dead transitions. [2023-08-26 11:54:33,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 72 transitions, 312 flow [2023-08-26 11:54:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:54:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:54:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-26 11:54:33,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3060240963855422 [2023-08-26 11:54:33,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-26 11:54:33,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-26 11:54:33,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:33,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-26 11:54:33,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:33,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:33,962 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 415.0) internal successors, (1660), 4 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:33,963 INFO L175 Difference]: Start difference. First operand has 65 places, 54 transitions, 130 flow. Second operand 3 states and 381 transitions. [2023-08-26 11:54:33,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 72 transitions, 312 flow [2023-08-26 11:54:33,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 72 transitions, 311 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:33,965 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 155 flow [2023-08-26 11:54:33,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=155, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2023-08-26 11:54:33,966 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -55 predicate places. [2023-08-26 11:54:33,966 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 155 flow [2023-08-26 11:54:33,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:33,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:33,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:33,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 11:54:33,967 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:54:33,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:33,967 INFO L85 PathProgramCache]: Analyzing trace with hash -832892070, now seen corresponding path program 1 times [2023-08-26 11:54:33,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:33,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288371905] [2023-08-26 11:54:33,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:33,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:34,009 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 11:54:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288371905] [2023-08-26 11:54:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288371905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:34,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:34,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:54:34,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552090256] [2023-08-26 11:54:34,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:34,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:54:34,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:34,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:54:34,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:54:34,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 415 [2023-08-26 11:54:34,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:34,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:34,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 415 [2023-08-26 11:54:34,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:43,197 INFO L124 PetriNetUnfolderBase]: 105304/136311 cut-off events. [2023-08-26 11:54:43,197 INFO L125 PetriNetUnfolderBase]: For 15162/15162 co-relation queries the response was YES. [2023-08-26 11:54:43,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289576 conditions, 136311 events. 105304/136311 cut-off events. For 15162/15162 co-relation queries the response was YES. Maximal size of possible extension queue 4049. Compared 833073 event pairs, 30707 based on Foata normal form. 732/130686 useless extension candidates. Maximal degree in co-relation 289568. Up to 107547 conditions per place. [2023-08-26 11:54:44,138 INFO L140 encePairwiseOnDemand]: 401/415 looper letters, 155 selfloop transitions, 27 changer transitions 0/186 dead transitions. [2023-08-26 11:54:44,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 186 transitions, 844 flow [2023-08-26 11:54:44,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:54:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:54:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 898 transitions. [2023-08-26 11:54:44,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30912220309810673 [2023-08-26 11:54:44,141 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 898 transitions. [2023-08-26 11:54:44,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 898 transitions. [2023-08-26 11:54:44,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:44,142 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 898 transitions. [2023-08-26 11:54:44,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.28571428571428) internal successors, (898), 7 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:44,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 415.0) internal successors, (3320), 8 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:44,147 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 415.0) internal successors, (3320), 8 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:44,147 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 155 flow. Second operand 7 states and 898 transitions. [2023-08-26 11:54:44,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 186 transitions, 844 flow [2023-08-26 11:54:44,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 186 transitions, 838 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:44,155 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 346 flow [2023-08-26 11:54:44,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2023-08-26 11:54:44,155 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -46 predicate places. [2023-08-26 11:54:44,155 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 346 flow [2023-08-26 11:54:44,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:44,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:44,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:44,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 11:54:44,156 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:54:44,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1545403108, now seen corresponding path program 1 times [2023-08-26 11:54:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:44,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837600775] [2023-08-26 11:54:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:44,230 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 11:54:44,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:44,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837600775] [2023-08-26 11:54:44,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837600775] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:44,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:44,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 11:54:44,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448915342] [2023-08-26 11:54:44,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:44,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:54:44,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:54:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:54:44,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 415 [2023-08-26 11:54:44,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 346 flow. Second operand has 7 states, 7 states have (on average 102.71428571428571) internal successors, (719), 7 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:44,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:44,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 415 [2023-08-26 11:54:44,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:54:57,384 INFO L124 PetriNetUnfolderBase]: 132698/172101 cut-off events. [2023-08-26 11:54:57,384 INFO L125 PetriNetUnfolderBase]: For 97446/97446 co-relation queries the response was YES. [2023-08-26 11:54:58,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442871 conditions, 172101 events. 132698/172101 cut-off events. For 97446/97446 co-relation queries the response was YES. Maximal size of possible extension queue 5283. Compared 1100901 event pairs, 24733 based on Foata normal form. 1464/166264 useless extension candidates. Maximal degree in co-relation 442859. Up to 108245 conditions per place. [2023-08-26 11:54:58,792 INFO L140 encePairwiseOnDemand]: 400/415 looper letters, 214 selfloop transitions, 37 changer transitions 0/255 dead transitions. [2023-08-26 11:54:58,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 255 transitions, 1380 flow [2023-08-26 11:54:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:54:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:54:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1161 transitions. [2023-08-26 11:54:58,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3108433734939759 [2023-08-26 11:54:58,796 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1161 transitions. [2023-08-26 11:54:58,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1161 transitions. [2023-08-26 11:54:58,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:54:58,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1161 transitions. [2023-08-26 11:54:58,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 129.0) internal successors, (1161), 9 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 415.0) internal successors, (4150), 10 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,803 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 415.0) internal successors, (4150), 10 states have internal predecessors, (4150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:58,803 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 346 flow. Second operand 9 states and 1161 transitions. [2023-08-26 11:54:58,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 255 transitions, 1380 flow [2023-08-26 11:54:59,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 255 transitions, 1366 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 11:54:59,111 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 506 flow [2023-08-26 11:54:59,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=506, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2023-08-26 11:54:59,112 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -37 predicate places. [2023-08-26 11:54:59,112 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 506 flow [2023-08-26 11:54:59,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.71428571428571) internal successors, (719), 7 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:59,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:54:59,112 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:54:59,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 11:54:59,113 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:54:59,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:54:59,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1123677213, now seen corresponding path program 1 times [2023-08-26 11:54:59,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:54:59,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273638876] [2023-08-26 11:54:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:54:59,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:54:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:54:59,165 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 11:54:59,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:54:59,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273638876] [2023-08-26 11:54:59,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273638876] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:54:59,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:54:59,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:54:59,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764966710] [2023-08-26 11:54:59,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:54:59,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:54:59,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:54:59,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:54:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:54:59,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 415 [2023-08-26 11:54:59,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 506 flow. Second operand has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:54:59,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:54:59,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 415 [2023-08-26 11:54:59,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:16,253 INFO L124 PetriNetUnfolderBase]: 162931/211454 cut-off events. [2023-08-26 11:55:16,254 INFO L125 PetriNetUnfolderBase]: For 230553/230553 co-relation queries the response was YES. [2023-08-26 11:55:17,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 609167 conditions, 211454 events. 162931/211454 cut-off events. For 230553/230553 co-relation queries the response was YES. Maximal size of possible extension queue 6827. Compared 1381121 event pairs, 42577 based on Foata normal form. 880/204263 useless extension candidates. Maximal degree in co-relation 609152. Up to 173370 conditions per place. [2023-08-26 11:55:18,350 INFO L140 encePairwiseOnDemand]: 401/415 looper letters, 202 selfloop transitions, 37 changer transitions 0/243 dead transitions. [2023-08-26 11:55:18,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 243 transitions, 1656 flow [2023-08-26 11:55:18,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:55:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:55:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 895 transitions. [2023-08-26 11:55:18,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3080895008605852 [2023-08-26 11:55:18,353 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 895 transitions. [2023-08-26 11:55:18,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 895 transitions. [2023-08-26 11:55:18,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:18,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 895 transitions. [2023-08-26 11:55:18,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.85714285714286) internal successors, (895), 7 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:18,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 415.0) internal successors, (3320), 8 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:18,359 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 415.0) internal successors, (3320), 8 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:18,359 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 506 flow. Second operand 7 states and 895 transitions. [2023-08-26 11:55:18,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 243 transitions, 1656 flow [2023-08-26 11:55:19,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 243 transitions, 1498 flow, removed 30 selfloop flow, removed 6 redundant places. [2023-08-26 11:55:19,678 INFO L231 Difference]: Finished difference. Result has 89 places, 121 transitions, 795 flow [2023-08-26 11:55:19,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=89, PETRI_TRANSITIONS=121} [2023-08-26 11:55:19,678 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -33 predicate places. [2023-08-26 11:55:19,678 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 121 transitions, 795 flow [2023-08-26 11:55:19,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.2) internal successors, (521), 5 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:19,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:19,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:19,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 11:55:19,679 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:55:19,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:19,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1817003758, now seen corresponding path program 1 times [2023-08-26 11:55:19,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:19,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942764449] [2023-08-26 11:55:19,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:19,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:19,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:19,741 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 11:55:19,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942764449] [2023-08-26 11:55:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942764449] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:19,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:19,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 11:55:19,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744699838] [2023-08-26 11:55:19,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:19,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:55:19,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:19,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:55:19,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:55:19,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 415 [2023-08-26 11:55:19,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 121 transitions, 795 flow. Second operand has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:19,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:19,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 415 [2023-08-26 11:55:19,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:55:44,256 INFO L124 PetriNetUnfolderBase]: 207695/269802 cut-off events. [2023-08-26 11:55:44,256 INFO L125 PetriNetUnfolderBase]: For 513279/513279 co-relation queries the response was YES. [2023-08-26 11:55:45,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847505 conditions, 269802 events. 207695/269802 cut-off events. For 513279/513279 co-relation queries the response was YES. Maximal size of possible extension queue 8990. Compared 1824600 event pairs, 41035 based on Foata normal form. 1792/262259 useless extension candidates. Maximal degree in co-relation 847486. Up to 175518 conditions per place. [2023-08-26 11:55:47,008 INFO L140 encePairwiseOnDemand]: 399/415 looper letters, 302 selfloop transitions, 64 changer transitions 0/370 dead transitions. [2023-08-26 11:55:47,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 370 transitions, 2626 flow [2023-08-26 11:55:47,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:55:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:55:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1291 transitions. [2023-08-26 11:55:47,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3110843373493976 [2023-08-26 11:55:47,011 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1291 transitions. [2023-08-26 11:55:47,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1291 transitions. [2023-08-26 11:55:47,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:55:47,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1291 transitions. [2023-08-26 11:55:47,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 129.1) internal successors, (1291), 10 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:47,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 415.0) internal successors, (4565), 11 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:47,019 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 415.0) internal successors, (4565), 11 states have internal predecessors, (4565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:47,019 INFO L175 Difference]: Start difference. First operand has 89 places, 121 transitions, 795 flow. Second operand 10 states and 1291 transitions. [2023-08-26 11:55:47,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 370 transitions, 2626 flow [2023-08-26 11:55:51,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 370 transitions, 2548 flow, removed 39 selfloop flow, removed 0 redundant places. [2023-08-26 11:55:51,169 INFO L231 Difference]: Finished difference. Result has 101 places, 148 transitions, 1209 flow [2023-08-26 11:55:51,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1209, PETRI_PLACES=101, PETRI_TRANSITIONS=148} [2023-08-26 11:55:51,170 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -21 predicate places. [2023-08-26 11:55:51,170 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 148 transitions, 1209 flow [2023-08-26 11:55:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 102.85714285714286) internal successors, (720), 7 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:51,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:55:51,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:55:51,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 11:55:51,171 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err4ASSERT_VIOLATIONASSERT === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:55:51,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:55:51,171 INFO L85 PathProgramCache]: Analyzing trace with hash 879040220, now seen corresponding path program 1 times [2023-08-26 11:55:51,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:55:51,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134038397] [2023-08-26 11:55:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:55:51,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:55:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:55:51,259 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 11:55:51,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:55:51,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134038397] [2023-08-26 11:55:51,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134038397] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:55:51,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:55:51,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 11:55:51,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059692525] [2023-08-26 11:55:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:55:51,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 11:55:51,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:55:51,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 11:55:51,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-26 11:55:51,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 415 [2023-08-26 11:55:51,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 148 transitions, 1209 flow. Second operand has 9 states, 9 states have (on average 101.77777777777777) internal successors, (916), 9 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:55:51,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:55:51,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 415 [2023-08-26 11:55:51,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:56:34,821 INFO L124 PetriNetUnfolderBase]: 325978/422861 cut-off events. [2023-08-26 11:56:34,821 INFO L125 PetriNetUnfolderBase]: For 1737494/1737494 co-relation queries the response was YES. [2023-08-26 11:56:37,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1493907 conditions, 422861 events. 325978/422861 cut-off events. For 1737494/1737494 co-relation queries the response was YES. Maximal size of possible extension queue 13829. Compared 2995972 event pairs, 33683 based on Foata normal form. 7316/416084 useless extension candidates. Maximal degree in co-relation 1493884. Up to 193014 conditions per place. [2023-08-26 11:56:39,789 INFO L140 encePairwiseOnDemand]: 397/415 looper letters, 503 selfloop transitions, 222 changer transitions 0/729 dead transitions. [2023-08-26 11:56:39,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 729 transitions, 6672 flow [2023-08-26 11:56:39,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 11:56:39,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 11:56:39,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1962 transitions. [2023-08-26 11:56:39,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3151807228915663 [2023-08-26 11:56:39,794 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1962 transitions. [2023-08-26 11:56:39,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1962 transitions. [2023-08-26 11:56:39,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:56:39,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1962 transitions. [2023-08-26 11:56:39,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 130.8) internal successors, (1962), 15 states have internal predecessors, (1962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:39,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 415.0) internal successors, (6640), 16 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:39,805 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 415.0) internal successors, (6640), 16 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:56:39,805 INFO L175 Difference]: Start difference. First operand has 101 places, 148 transitions, 1209 flow. Second operand 15 states and 1962 transitions. [2023-08-26 11:56:39,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 729 transitions, 6672 flow [2023-08-26 11:57:19,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 729 transitions, 5576 flow, removed 440 selfloop flow, removed 5 redundant places. [2023-08-26 11:57:19,957 INFO L231 Difference]: Finished difference. Result has 119 places, 316 transitions, 3494 flow [2023-08-26 11:57:19,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=415, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3494, PETRI_PLACES=119, PETRI_TRANSITIONS=316} [2023-08-26 11:57:19,958 INFO L281 CegarLoopForPetriNet]: 122 programPoint places, -3 predicate places. [2023-08-26 11:57:19,958 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 316 transitions, 3494 flow [2023-08-26 11:57:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 101.77777777777777) internal successors, (916), 9 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:19,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:19,958 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:57:19,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 11:57:19,958 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 103 more)] === [2023-08-26 11:57:19,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:19,959 INFO L85 PathProgramCache]: Analyzing trace with hash 618821367, now seen corresponding path program 1 times [2023-08-26 11:57:19,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:19,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274896161] [2023-08-26 11:57:19,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:19,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:57:19,969 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:57:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:57:19,980 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:57:19,980 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:57:19,980 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (105 of 106 remaining) [2023-08-26 11:57:19,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 106 remaining) [2023-08-26 11:57:19,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 106 remaining) [2023-08-26 11:57:19,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 106 remaining) [2023-08-26 11:57:19,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 106 remaining) [2023-08-26 11:57:19,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 106 remaining) [2023-08-26 11:57:19,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 106 remaining) [2023-08-26 11:57:19,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 106 remaining) [2023-08-26 11:57:19,981 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (97 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 106 remaining) [2023-08-26 11:57:19,982 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (80 of 106 remaining) [2023-08-26 11:57:19,983 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (75 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 106 remaining) [2023-08-26 11:57:19,984 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 106 remaining) [2023-08-26 11:57:19,985 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 106 remaining) [2023-08-26 11:57:19,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 106 remaining) [2023-08-26 11:57:19,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 106 remaining) [2023-08-26 11:57:19,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 106 remaining) [2023-08-26 11:57:19,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 106 remaining) [2023-08-26 11:57:19,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 106 remaining) [2023-08-26 11:57:19,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 106 remaining) [2023-08-26 11:57:19,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 106 remaining) [2023-08-26 11:57:19,986 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 106 remaining) [2023-08-26 11:57:19,987 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 106 remaining) [2023-08-26 11:57:19,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 106 remaining) [2023-08-26 11:57:19,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 106 remaining) [2023-08-26 11:57:19,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 106 remaining) [2023-08-26 11:57:19,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 106 remaining) [2023-08-26 11:57:19,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 106 remaining) [2023-08-26 11:57:19,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 106 remaining) [2023-08-26 11:57:19,988 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 106 remaining) [2023-08-26 11:57:19,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 106 remaining) [2023-08-26 11:57:19,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 106 remaining) [2023-08-26 11:57:19,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr2Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 106 remaining) [2023-08-26 11:57:19,990 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (18 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 106 remaining) [2023-08-26 11:57:19,991 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 106 remaining) [2023-08-26 11:57:19,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 106 remaining) [2023-08-26 11:57:19,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 106 remaining) [2023-08-26 11:57:19,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 106 remaining) [2023-08-26 11:57:19,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 106 remaining) [2023-08-26 11:57:19,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 106 remaining) [2023-08-26 11:57:19,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (9 of 106 remaining) [2023-08-26 11:57:19,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 106 remaining) [2023-08-26 11:57:19,992 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 106 remaining) [2023-08-26 11:57:19,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 106 remaining) [2023-08-26 11:57:19,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 106 remaining) [2023-08-26 11:57:19,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 106 remaining) [2023-08-26 11:57:19,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 106 remaining) [2023-08-26 11:57:19,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 106 remaining) [2023-08-26 11:57:19,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 106 remaining) [2023-08-26 11:57:19,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONASSERT (0 of 106 remaining) [2023-08-26 11:57:19,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 11:57:19,994 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:57:19,994 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 11:57:19,994 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 11:57:20,057 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:57:20,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 315 places, 318 transitions, 700 flow [2023-08-26 11:57:20,090 INFO L124 PetriNetUnfolderBase]: 13/293 cut-off events. [2023-08-26 11:57:20,091 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:57:20,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322 conditions, 293 events. 13/293 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1089 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 313. Up to 10 conditions per place. [2023-08-26 11:57:20,094 INFO L82 GeneralOperation]: Start removeDead. Operand has 315 places, 318 transitions, 700 flow [2023-08-26 11:57:20,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 239 transitions, 513 flow [2023-08-26 11:57:20,098 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:57:20,098 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 239 transitions, 513 flow [2023-08-26 11:57:20,099 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 239 transitions, 513 flow [2023-08-26 11:57:20,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 239 transitions, 513 flow [2023-08-26 11:57:20,129 INFO L124 PetriNetUnfolderBase]: 13/293 cut-off events. [2023-08-26 11:57:20,129 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 11:57:20,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 293 events. 13/293 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1079 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 290. Up to 10 conditions per place. [2023-08-26 11:57:20,145 INFO L119 LiptonReduction]: Number of co-enabled transitions 37514 [2023-08-26 11:57:24,820 INFO L134 LiptonReduction]: Checked pairs total: 152192 [2023-08-26 11:57:24,820 INFO L136 LiptonReduction]: Total number of compositions: 199 [2023-08-26 11:57:24,821 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:57:24,821 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;@52145046, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:57:24,821 INFO L358 AbstractCegarLoop]: Starting to check reachability of 131 error locations. [2023-08-26 11:57:24,822 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:57:24,822 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:57:24,822 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:57:24,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:57:24,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:57:24,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 128 more)] === [2023-08-26 11:57:24,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:57:24,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2098, now seen corresponding path program 1 times [2023-08-26 11:57:24,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:57:24,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449090226] [2023-08-26 11:57:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:57:24,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:57:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:57:24,828 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 11:57:24,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:57:24,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449090226] [2023-08-26 11:57:24,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449090226] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:57:24,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:57:24,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:57:24,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578830877] [2023-08-26 11:57:24,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:57:24,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:57:24,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:57:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:57:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:57:24,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 517 [2023-08-26 11:57:24,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 147 transitions, 329 flow. Second operand has 2 states, 2 states have (on average 168.5) internal successors, (337), 2 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:57:24,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:57:24,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 517 [2023-08-26 11:57:24,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand