/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:48:50,093 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:48:50,182 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 18:48:50,186 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:48:50,187 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:48:50,224 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:48:50,225 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:48:50,226 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:48:50,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:48:50,230 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:48:50,230 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:48:50,230 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:48:50,231 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:48:50,232 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:48:50,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:48:50,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:48:50,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:48:50,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:48:50,233 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:48:50,233 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:48:50,233 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:48:50,234 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:48:50,234 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:48:50,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:48:50,235 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:48:50,235 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:48:50,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:48:50,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:48:50,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:48:50,236 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:48:50,237 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:48:50,237 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:48:50,237 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:48:50,237 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:48:50,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:48:50,238 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:48:50,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:48:50,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:48:50,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:48:50,556 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:48:50,557 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:48:50,558 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-26 18:48:51,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:48:51,956 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:48:51,957 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-26 18:48:51,975 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7610066b0/290f8cc88fff45a18123e2f5abb8ae57/FLAG07399342b [2023-08-26 18:48:51,986 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7610066b0/290f8cc88fff45a18123e2f5abb8ae57 [2023-08-26 18:48:51,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:48:51,989 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:48:51,990 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:48:51,990 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:48:51,992 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:48:51,993 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:48:51" (1/1) ... [2023-08-26 18:48:51,994 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38b3a065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:51, skipping insertion in model container [2023-08-26 18:48:51,994 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:48:51" (1/1) ... [2023-08-26 18:48:52,033 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:48:52,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:48:52,359 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:48:52,387 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:48:52,389 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 18:48:52,413 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:48:52,464 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:48:52,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52 WrapperNode [2023-08-26 18:48:52,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:48:52,465 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:48:52,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:48:52,466 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:48:52,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,530 INFO L138 Inliner]: procedures = 170, calls = 38, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2023-08-26 18:48:52,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:48:52,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:48:52,533 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:48:52,533 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:48:52,541 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,541 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,564 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,570 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:48:52,583 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:48:52,583 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:48:52,583 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:48:52,584 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (1/1) ... [2023-08-26 18:48:52,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:48:52,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:48:52,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 18:48:52,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 18:48:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:48:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:48:52,640 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:48:52,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:48:52,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:48:52,641 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 18:48:52,641 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 18:48:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:48:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:48:52,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:48:52,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:48:52,644 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 18:48:52,807 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:48:52,809 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:48:53,104 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:48:53,112 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:48:53,112 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-26 18:48:53,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:48:53 BoogieIcfgContainer [2023-08-26 18:48:53,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:48:53,116 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:48:53,118 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:48:53,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:48:53,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:48:51" (1/3) ... [2023-08-26 18:48:53,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67315a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:48:53, skipping insertion in model container [2023-08-26 18:48:53,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:48:52" (2/3) ... [2023-08-26 18:48:53,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67315a48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:48:53, skipping insertion in model container [2023-08-26 18:48:53,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:48:53" (3/3) ... [2023-08-26 18:48:53,123 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-08-26 18:48:53,141 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:48:53,142 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-26 18:48:53,142 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:48:53,207 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 18:48:53,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 137 transitions, 282 flow [2023-08-26 18:48:53,305 INFO L124 PetriNetUnfolderBase]: 19/184 cut-off events. [2023-08-26 18:48:53,306 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:48:53,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 184 events. 19/184 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 552 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 18:48:53,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 137 transitions, 282 flow [2023-08-26 18:48:53,320 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 137 transitions, 282 flow [2023-08-26 18:48:53,325 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:48:53,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 137 transitions, 282 flow [2023-08-26 18:48:53,345 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 137 transitions, 282 flow [2023-08-26 18:48:53,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 137 transitions, 282 flow [2023-08-26 18:48:53,397 INFO L124 PetriNetUnfolderBase]: 19/184 cut-off events. [2023-08-26 18:48:53,397 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:48:53,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 184 events. 19/184 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 552 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 18:48:53,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 4346 [2023-08-26 18:48:57,006 INFO L134 LiptonReduction]: Checked pairs total: 9598 [2023-08-26 18:48:57,007 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-26 18:48:57,018 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:48:57,024 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;@169f1d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:48:57,025 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-26 18:48:57,027 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:48:57,027 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 18:48:57,027 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:48:57,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:57,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:48:57,028 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:48:57,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:57,032 INFO L85 PathProgramCache]: Analyzing trace with hash 16856, now seen corresponding path program 1 times [2023-08-26 18:48:57,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:57,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234463896] [2023-08-26 18:48:57,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:57,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:57,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:57,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234463896] [2023-08-26 18:48:57,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234463896] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:57,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:48:57,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:48:57,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497619794] [2023-08-26 18:48:57,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:48:57,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:48:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:48:57,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 262 [2023-08-26 18:48:57,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 49 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:57,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 262 [2023-08-26 18:48:57,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:57,570 INFO L124 PetriNetUnfolderBase]: 192/464 cut-off events. [2023-08-26 18:48:57,570 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:48:57,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 896 conditions, 464 events. 192/464 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2347 event pairs, 165 based on Foata normal form. 17/322 useless extension candidates. Maximal degree in co-relation 862. Up to 407 conditions per place. [2023-08-26 18:48:57,574 INFO L140 encePairwiseOnDemand]: 247/262 looper letters, 44 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-26 18:48:57,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 204 flow [2023-08-26 18:48:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:48:57,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:48:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-26 18:48:57,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43256997455470736 [2023-08-26 18:48:57,590 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-26 18:48:57,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-26 18:48:57,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:57,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-26 18:48:57,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,602 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,603 INFO L175 Difference]: Start difference. First operand has 42 places, 49 transitions, 106 flow. Second operand 3 states and 340 transitions. [2023-08-26 18:48:57,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 204 flow [2023-08-26 18:48:57,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:48:57,607 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 94 flow [2023-08-26 18:48:57,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-08-26 18:48:57,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 1 predicate places. [2023-08-26 18:48:57,612 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 94 flow [2023-08-26 18:48:57,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:57,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:48:57,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:48:57,613 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:48:57,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:57,613 INFO L85 PathProgramCache]: Analyzing trace with hash 16857, now seen corresponding path program 1 times [2023-08-26 18:48:57,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:57,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919123440] [2023-08-26 18:48:57,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:57,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:57,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:57,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919123440] [2023-08-26 18:48:57,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919123440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:57,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:48:57,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:48:57,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111304374] [2023-08-26 18:48:57,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:57,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:48:57,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:57,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:48:57,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:48:57,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 262 [2023-08-26 18:48:57,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:57,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 262 [2023-08-26 18:48:57,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:57,761 INFO L124 PetriNetUnfolderBase]: 210/464 cut-off events. [2023-08-26 18:48:57,761 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-26 18:48:57,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 999 conditions, 464 events. 210/464 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2200 event pairs, 195 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 964. Up to 425 conditions per place. [2023-08-26 18:48:57,766 INFO L140 encePairwiseOnDemand]: 258/262 looper letters, 43 selfloop transitions, 2 changer transitions 3/51 dead transitions. [2023-08-26 18:48:57,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 216 flow [2023-08-26 18:48:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:48:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:48:57,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-26 18:48:57,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4300254452926209 [2023-08-26 18:48:57,771 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-26 18:48:57,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-26 18:48:57,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:57,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-26 18:48:57,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 262.0) internal successors, (1048), 4 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,776 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 94 flow. Second operand 3 states and 338 transitions. [2023-08-26 18:48:57,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 216 flow [2023-08-26 18:48:57,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 51 transitions, 212 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:57,778 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 90 flow [2023-08-26 18:48:57,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 18:48:57,779 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-26 18:48:57,779 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 90 flow [2023-08-26 18:48:57,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:57,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:57,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 18:48:57,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:48:57,780 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:48:57,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash 502500134, now seen corresponding path program 1 times [2023-08-26 18:48:57,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:57,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986061795] [2023-08-26 18:48:57,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:57,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:57,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:57,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:57,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986061795] [2023-08-26 18:48:57,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986061795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:48:57,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735195446] [2023-08-26 18:48:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:57,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:57,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:48:57,917 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:48:57,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 18:48:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:57,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:48:58,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:48:58,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:48:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:58,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:48:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:58,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735195446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:48:58,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:48:58,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 18:48:58,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814305690] [2023-08-26 18:48:58,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:48:58,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:48:58,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:58,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:48:58,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:48:58,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 262 [2023-08-26 18:48:58,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 90 flow. Second operand has 7 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:58,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 262 [2023-08-26 18:48:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:58,186 INFO L124 PetriNetUnfolderBase]: 24/83 cut-off events. [2023-08-26 18:48:58,186 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:48:58,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182 conditions, 83 events. 24/83 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 265 event pairs, 0 based on Foata normal form. 13/89 useless extension candidates. Maximal degree in co-relation 174. Up to 50 conditions per place. [2023-08-26 18:48:58,187 INFO L140 encePairwiseOnDemand]: 258/262 looper letters, 21 selfloop transitions, 2 changer transitions 6/35 dead transitions. [2023-08-26 18:48:58,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 137 flow [2023-08-26 18:48:58,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:48:58,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:48:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 395 transitions. [2023-08-26 18:48:58,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37690839694656486 [2023-08-26 18:48:58,189 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 395 transitions. [2023-08-26 18:48:58,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 395 transitions. [2023-08-26 18:48:58,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:58,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 395 transitions. [2023-08-26 18:48:58,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 98.75) internal successors, (395), 4 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,194 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,194 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 90 flow. Second operand 4 states and 395 transitions. [2023-08-26 18:48:58,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 137 flow [2023-08-26 18:48:58,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:58,195 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 48 flow [2023-08-26 18:48:58,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2023-08-26 18:48:58,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -13 predicate places. [2023-08-26 18:48:58,197 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 48 flow [2023-08-26 18:48:58,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.71428571428571) internal successors, (649), 7 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:58,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:48:58,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 18:48:58,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:48:58,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:48:58,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:58,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1602394311, now seen corresponding path program 1 times [2023-08-26 18:48:58,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:58,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937595718] [2023-08-26 18:48:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:58,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:58,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:58,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:58,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937595718] [2023-08-26 18:48:58,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937595718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:58,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:48:58,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:48:58,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541707504] [2023-08-26 18:48:58,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:58,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:48:58,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:58,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:48:58,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:48:58,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 262 [2023-08-26 18:48:58,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:58,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 262 [2023-08-26 18:48:58,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:58,653 INFO L124 PetriNetUnfolderBase]: 20/62 cut-off events. [2023-08-26 18:48:58,653 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 18:48:58,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 62 events. 20/62 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 129 event pairs, 0 based on Foata normal form. 3/56 useless extension candidates. Maximal degree in co-relation 129. Up to 50 conditions per place. [2023-08-26 18:48:58,655 INFO L140 encePairwiseOnDemand]: 258/262 looper letters, 14 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 18:48:58,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 19 transitions, 82 flow [2023-08-26 18:48:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:48:58,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:48:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 374 transitions. [2023-08-26 18:48:58,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3568702290076336 [2023-08-26 18:48:58,657 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 374 transitions. [2023-08-26 18:48:58,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 374 transitions. [2023-08-26 18:48:58,658 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:58,658 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 374 transitions. [2023-08-26 18:48:58,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,662 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,662 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 48 flow. Second operand 4 states and 374 transitions. [2023-08-26 18:48:58,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 19 transitions, 82 flow [2023-08-26 18:48:58,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 78 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:58,663 INFO L231 Difference]: Finished difference. Result has 25 places, 17 transitions, 45 flow [2023-08-26 18:48:58,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=45, PETRI_PLACES=25, PETRI_TRANSITIONS=17} [2023-08-26 18:48:58,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -17 predicate places. [2023-08-26 18:48:58,665 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 17 transitions, 45 flow [2023-08-26 18:48:58,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 90.0) internal successors, (450), 5 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:48:58,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:48:58,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:48:58,666 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 18:48:58,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:48:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1865380916, now seen corresponding path program 1 times [2023-08-26 18:48:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:48:58,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354185132] [2023-08-26 18:48:58,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:48:58,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:48:58,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:48:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:48:58,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:48:58,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354185132] [2023-08-26 18:48:58,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354185132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:48:58,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:48:58,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:48:58,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709730171] [2023-08-26 18:48:58,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:48:58,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:48:58,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:48:58,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:48:58,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:48:58,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 262 [2023-08-26 18:48:58,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 17 transitions, 45 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:48:58,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 262 [2023-08-26 18:48:58,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:48:58,834 INFO L124 PetriNetUnfolderBase]: 12/42 cut-off events. [2023-08-26 18:48:58,835 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 18:48:58,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 42 events. 12/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 66 event pairs, 0 based on Foata normal form. 3/45 useless extension candidates. Maximal degree in co-relation 88. Up to 30 conditions per place. [2023-08-26 18:48:58,835 INFO L140 encePairwiseOnDemand]: 256/262 looper letters, 0 selfloop transitions, 0 changer transitions 15/15 dead transitions. [2023-08-26 18:48:58,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 15 transitions, 66 flow [2023-08-26 18:48:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:48:58,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:48:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 368 transitions. [2023-08-26 18:48:58,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511450381679389 [2023-08-26 18:48:58,837 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 368 transitions. [2023-08-26 18:48:58,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 368 transitions. [2023-08-26 18:48:58,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:48:58,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 368 transitions. [2023-08-26 18:48:58,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,841 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 262.0) internal successors, (1310), 5 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,841 INFO L175 Difference]: Start difference. First operand has 25 places, 17 transitions, 45 flow. Second operand 4 states and 368 transitions. [2023-08-26 18:48:58,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 15 transitions, 66 flow [2023-08-26 18:48:58,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:48:58,842 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-26 18:48:58,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-26 18:48:58,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -20 predicate places. [2023-08-26 18:48:58,844 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-26 18:48:58,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:48:58,847 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 23 remaining) [2023-08-26 18:48:58,847 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2023-08-26 18:48:58,847 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-26 18:48:58,847 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-26 18:48:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-26 18:48:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (17 of 23 remaining) [2023-08-26 18:48:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-26 18:48:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-26 18:48:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-26 18:48:58,848 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2023-08-26 18:48:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2023-08-26 18:48:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2023-08-26 18:48:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-26 18:48:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-26 18:48:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2023-08-26 18:48:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-08-26 18:48:58,849 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-26 18:48:58,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-26 18:48:58,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2023-08-26 18:48:58,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2023-08-26 18:48:58,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2023-08-26 18:48:58,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2023-08-26 18:48:58,850 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2023-08-26 18:48:58,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:48:58,851 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 18:48:58,852 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:48:58,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 137 transitions, 282 flow [2023-08-26 18:48:58,871 INFO L124 PetriNetUnfolderBase]: 19/184 cut-off events. [2023-08-26 18:48:58,871 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:48:58,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190 conditions, 184 events. 19/184 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 552 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 18:48:58,872 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 137 transitions, 282 flow [2023-08-26 18:48:58,873 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 132 transitions, 269 flow [2023-08-26 18:48:58,873 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:48:58,873 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 132 transitions, 269 flow [2023-08-26 18:48:58,873 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 132 transitions, 269 flow [2023-08-26 18:48:58,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 132 transitions, 269 flow [2023-08-26 18:48:58,886 INFO L124 PetriNetUnfolderBase]: 18/179 cut-off events. [2023-08-26 18:48:58,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:48:58,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 179 events. 18/179 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 526 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-26 18:48:58,888 INFO L119 LiptonReduction]: Number of co-enabled transitions 4346 [2023-08-26 18:49:01,951 INFO L134 LiptonReduction]: Checked pairs total: 8582 [2023-08-26 18:49:01,952 INFO L136 LiptonReduction]: Total number of compositions: 120 [2023-08-26 18:49:01,953 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:49:01,954 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;@169f1d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:49:01,954 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:49:01,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:49:01,958 INFO L124 PetriNetUnfolderBase]: 3/28 cut-off events. [2023-08-26 18:49:01,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:49:01,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:01,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 18:49:01,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:49:01,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:01,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1955162419, now seen corresponding path program 1 times [2023-08-26 18:49:01,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:01,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725942963] [2023-08-26 18:49:01,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:49:01,983 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:49:01,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:49:02,003 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:49:02,004 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:49:02,004 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:49:02,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 18:49:02,004 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:49:02,005 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:49:02,005 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:49:02,005 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 18:49:02,025 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 18:49:02,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:02,052 INFO L124 PetriNetUnfolderBase]: 34/301 cut-off events. [2023-08-26 18:49:02,053 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:49:02,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 34/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1082 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2023-08-26 18:49:02,054 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:02,057 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:02,057 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:49:02,057 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:02,057 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:02,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:02,101 INFO L124 PetriNetUnfolderBase]: 34/301 cut-off events. [2023-08-26 18:49:02,101 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:49:02,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 34/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1082 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2023-08-26 18:49:02,109 INFO L119 LiptonReduction]: Number of co-enabled transitions 12956 [2023-08-26 18:49:05,400 INFO L134 LiptonReduction]: Checked pairs total: 31737 [2023-08-26 18:49:05,400 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-26 18:49:05,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:49:05,402 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;@169f1d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:49:05,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-08-26 18:49:05,404 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:49:05,404 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 18:49:05,404 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:49:05,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:05,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:49:05,404 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:49:05,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:05,405 INFO L85 PathProgramCache]: Analyzing trace with hash 32930, now seen corresponding path program 1 times [2023-08-26 18:49:05,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:05,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311726856] [2023-08-26 18:49:05,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:05,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:05,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:05,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311726856] [2023-08-26 18:49:05,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311726856] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:05,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:49:05,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:49:05,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398268398] [2023-08-26 18:49:05,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:49:05,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:05,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:49:05,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:49:05,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 339 [2023-08-26 18:49:05,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 78 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:05,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:05,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 339 [2023-08-26 18:49:05,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:06,469 INFO L124 PetriNetUnfolderBase]: 7278/11869 cut-off events. [2023-08-26 18:49:06,469 INFO L125 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2023-08-26 18:49:06,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23434 conditions, 11869 events. 7278/11869 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 80540 event pairs, 6750 based on Foata normal form. 501/7878 useless extension candidates. Maximal degree in co-relation 18029. Up to 10670 conditions per place. [2023-08-26 18:49:06,543 INFO L140 encePairwiseOnDemand]: 316/339 looper letters, 78 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2023-08-26 18:49:06,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 87 transitions, 352 flow [2023-08-26 18:49:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:49:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:49:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-08-26 18:49:06,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4778761061946903 [2023-08-26 18:49:06,545 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-08-26 18:49:06,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-08-26 18:49:06,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:06,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-08-26 18:49:06,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:06,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:06,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:06,549 INFO L175 Difference]: Start difference. First operand has 66 places, 78 transitions, 174 flow. Second operand 3 states and 486 transitions. [2023-08-26 18:49:06,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 87 transitions, 352 flow [2023-08-26 18:49:06,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:49:06,554 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 136 flow [2023-08-26 18:49:06,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-08-26 18:49:06,555 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2023-08-26 18:49:06,555 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 136 flow [2023-08-26 18:49:06,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:06,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:06,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:49:06,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 18:49:06,556 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:49:06,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:06,557 INFO L85 PathProgramCache]: Analyzing trace with hash 32931, now seen corresponding path program 1 times [2023-08-26 18:49:06,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:06,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777683837] [2023-08-26 18:49:06,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:06,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:06,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:06,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777683837] [2023-08-26 18:49:06,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777683837] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:06,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:49:06,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:49:06,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419052] [2023-08-26 18:49:06,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:06,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:49:06,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:49:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:49:06,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 339 [2023-08-26 18:49:06,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:06,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:06,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 339 [2023-08-26 18:49:06,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:07,344 INFO L124 PetriNetUnfolderBase]: 6386/10613 cut-off events. [2023-08-26 18:49:07,345 INFO L125 PetriNetUnfolderBase]: For 247/247 co-relation queries the response was YES. [2023-08-26 18:49:07,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21067 conditions, 10613 events. 6386/10613 cut-off events. For 247/247 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 73099 event pairs, 3010 based on Foata normal form. 0/7243 useless extension candidates. Maximal degree in co-relation 19380. Up to 10067 conditions per place. [2023-08-26 18:49:07,402 INFO L140 encePairwiseOnDemand]: 335/339 looper letters, 62 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-26 18:49:07,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 73 transitions, 296 flow [2023-08-26 18:49:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:49:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:49:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-26 18:49:07,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41297935103244837 [2023-08-26 18:49:07,405 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-26 18:49:07,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-26 18:49:07,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:07,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-26 18:49:07,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:07,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:07,408 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 339.0) internal successors, (1356), 4 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:07,408 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 136 flow. Second operand 3 states and 420 transitions. [2023-08-26 18:49:07,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 73 transitions, 296 flow [2023-08-26 18:49:07,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:49:07,420 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 146 flow [2023-08-26 18:49:07,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2023-08-26 18:49:07,421 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-26 18:49:07,421 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 146 flow [2023-08-26 18:49:07,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:07,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:07,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:49:07,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 18:49:07,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:49:07,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:07,422 INFO L85 PathProgramCache]: Analyzing trace with hash 371515327, now seen corresponding path program 1 times [2023-08-26 18:49:07,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:07,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966630583] [2023-08-26 18:49:07,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:07,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:07,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966630583] [2023-08-26 18:49:07,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966630583] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:49:07,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195542023] [2023-08-26 18:49:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:49:07,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:49:07,527 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:49:07,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 18:49:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:07,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:49:07,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:49:07,616 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:49:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:07,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:49:07,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:07,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195542023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:49:07,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:49:07,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 18:49:07,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38077545] [2023-08-26 18:49:07,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:49:07,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:49:07,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:49:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:49:07,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 339 [2023-08-26 18:49:07,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:07,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:07,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 339 [2023-08-26 18:49:07,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:08,421 INFO L124 PetriNetUnfolderBase]: 5839/9511 cut-off events. [2023-08-26 18:49:08,421 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2023-08-26 18:49:08,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19718 conditions, 9511 events. 5839/9511 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 66205 event pairs, 1 based on Foata normal form. 15/6607 useless extension candidates. Maximal degree in co-relation 2183. Up to 7392 conditions per place. [2023-08-26 18:49:08,479 INFO L140 encePairwiseOnDemand]: 335/339 looper letters, 116 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2023-08-26 18:49:08,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 129 transitions, 526 flow [2023-08-26 18:49:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:49:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:49:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 713 transitions. [2023-08-26 18:49:08,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4206489675516224 [2023-08-26 18:49:08,483 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 713 transitions. [2023-08-26 18:49:08,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 713 transitions. [2023-08-26 18:49:08,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:08,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 713 transitions. [2023-08-26 18:49:08,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:08,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:08,487 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:08,487 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 146 flow. Second operand 5 states and 713 transitions. [2023-08-26 18:49:08,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 129 transitions, 526 flow [2023-08-26 18:49:08,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 129 transitions, 524 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:49:08,491 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 148 flow [2023-08-26 18:49:08,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-08-26 18:49:08,493 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2023-08-26 18:49:08,493 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 148 flow [2023-08-26 18:49:08,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:08,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:08,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:49:08,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 18:49:08,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-26 18:49:08,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:49:08,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:08,700 INFO L85 PathProgramCache]: Analyzing trace with hash 371746583, now seen corresponding path program 1 times [2023-08-26 18:49:08,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:08,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370420444] [2023-08-26 18:49:08,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:08,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:08,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:08,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370420444] [2023-08-26 18:49:08,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370420444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:08,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:49:08,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:49:08,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126027034] [2023-08-26 18:49:08,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:08,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:49:08,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:49:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:49:08,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 339 [2023-08-26 18:49:08,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:08,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:08,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 339 [2023-08-26 18:49:08,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:09,417 INFO L124 PetriNetUnfolderBase]: 5049/8327 cut-off events. [2023-08-26 18:49:09,417 INFO L125 PetriNetUnfolderBase]: For 1381/1381 co-relation queries the response was YES. [2023-08-26 18:49:09,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17253 conditions, 8327 events. 5049/8327 cut-off events. For 1381/1381 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 53521 event pairs, 2127 based on Foata normal form. 203/6069 useless extension candidates. Maximal degree in co-relation 16682. Up to 6972 conditions per place. [2023-08-26 18:49:09,465 INFO L140 encePairwiseOnDemand]: 333/339 looper letters, 112 selfloop transitions, 5 changer transitions 0/125 dead transitions. [2023-08-26 18:49:09,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 125 transitions, 538 flow [2023-08-26 18:49:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:49:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:49:09,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 811 transitions. [2023-08-26 18:49:09,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39872173058013766 [2023-08-26 18:49:09,468 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 811 transitions. [2023-08-26 18:49:09,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 811 transitions. [2023-08-26 18:49:09,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:09,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 811 transitions. [2023-08-26 18:49:09,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.16666666666666) internal successors, (811), 6 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:09,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:09,473 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 339.0) internal successors, (2373), 7 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:09,474 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 148 flow. Second operand 6 states and 811 transitions. [2023-08-26 18:49:09,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 125 transitions, 538 flow [2023-08-26 18:49:09,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 125 transitions, 521 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 18:49:09,477 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 146 flow [2023-08-26 18:49:09,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2023-08-26 18:49:09,478 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2023-08-26 18:49:09,478 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 146 flow [2023-08-26 18:49:09,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 116.0) internal successors, (580), 5 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:09,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:09,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:49:09,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 18:49:09,479 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:49:09,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:09,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1360759646, now seen corresponding path program 1 times [2023-08-26 18:49:09,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:09,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248844735] [2023-08-26 18:49:09,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:09,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:09,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:09,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:09,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:09,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248844735] [2023-08-26 18:49:09,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248844735] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:09,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:49:09,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:49:09,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320603320] [2023-08-26 18:49:09,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:09,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:49:09,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:09,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:49:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:49:09,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 339 [2023-08-26 18:49:09,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:09,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:09,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 339 [2023-08-26 18:49:09,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:10,048 INFO L124 PetriNetUnfolderBase]: 3665/6135 cut-off events. [2023-08-26 18:49:10,048 INFO L125 PetriNetUnfolderBase]: For 725/725 co-relation queries the response was YES. [2023-08-26 18:49:10,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12700 conditions, 6135 events. 3665/6135 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 37822 event pairs, 1471 based on Foata normal form. 0/5039 useless extension candidates. Maximal degree in co-relation 12256. Up to 4764 conditions per place. [2023-08-26 18:49:10,082 INFO L140 encePairwiseOnDemand]: 327/339 looper letters, 110 selfloop transitions, 8 changer transitions 3/128 dead transitions. [2023-08-26 18:49:10,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 128 transitions, 545 flow [2023-08-26 18:49:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:49:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:49:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 698 transitions. [2023-08-26 18:49:10,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41179941002949855 [2023-08-26 18:49:10,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 698 transitions. [2023-08-26 18:49:10,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 698 transitions. [2023-08-26 18:49:10,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:10,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 698 transitions. [2023-08-26 18:49:10,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.6) internal successors, (698), 5 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,090 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,090 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 146 flow. Second operand 5 states and 698 transitions. [2023-08-26 18:49:10,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 128 transitions, 545 flow [2023-08-26 18:49:10,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 128 transitions, 544 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:49:10,096 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 202 flow [2023-08-26 18:49:10,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2023-08-26 18:49:10,097 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-26 18:49:10,098 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 202 flow [2023-08-26 18:49:10,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:10,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:49:10,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 18:49:10,099 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:49:10,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1232045367, now seen corresponding path program 1 times [2023-08-26 18:49:10,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:10,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246932156] [2023-08-26 18:49:10,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:10,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:10,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 18:49:10,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:10,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246932156] [2023-08-26 18:49:10,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246932156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:49:10,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696049768] [2023-08-26 18:49:10,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:10,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:49:10,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:49:10,233 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:49:10,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 18:49:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:10,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 18:49:10,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:49:10,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 18:49:10,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 18:49:10,378 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 18:49:10,378 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:49:10,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696049768] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:10,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:49:10,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 18:49:10,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102951527] [2023-08-26 18:49:10,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:10,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:49:10,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:10,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:49:10,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:49:10,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 339 [2023-08-26 18:49:10,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:10,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 339 [2023-08-26 18:49:10,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:10,753 INFO L124 PetriNetUnfolderBase]: 3186/5475 cut-off events. [2023-08-26 18:49:10,753 INFO L125 PetriNetUnfolderBase]: For 3230/3230 co-relation queries the response was YES. [2023-08-26 18:49:10,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12591 conditions, 5475 events. 3186/5475 cut-off events. For 3230/3230 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 34536 event pairs, 121 based on Foata normal form. 135/4763 useless extension candidates. Maximal degree in co-relation 11657. Up to 4881 conditions per place. [2023-08-26 18:49:10,775 INFO L140 encePairwiseOnDemand]: 335/339 looper letters, 78 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2023-08-26 18:49:10,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 480 flow [2023-08-26 18:49:10,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:49:10,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:49:10,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-08-26 18:49:10,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40486725663716816 [2023-08-26 18:49:10,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-08-26 18:49:10,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-08-26 18:49:10,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:10,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-08-26 18:49:10,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,782 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,782 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 202 flow. Second operand 4 states and 549 transitions. [2023-08-26 18:49:10,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 480 flow [2023-08-26 18:49:10,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 88 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:49:10,786 INFO L231 Difference]: Finished difference. Result has 68 places, 57 transitions, 197 flow [2023-08-26 18:49:10,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=68, PETRI_TRANSITIONS=57} [2023-08-26 18:49:10,786 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 2 predicate places. [2023-08-26 18:49:10,786 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 57 transitions, 197 flow [2023-08-26 18:49:10,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:10,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:10,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:49:10,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 18:49:10,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:49:10,992 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:49:10,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:10,993 INFO L85 PathProgramCache]: Analyzing trace with hash 461296970, now seen corresponding path program 1 times [2023-08-26 18:49:10,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:10,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533240516] [2023-08-26 18:49:10,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:10,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:11,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:11,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:11,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533240516] [2023-08-26 18:49:11,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533240516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:49:11,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510813080] [2023-08-26 18:49:11,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:11,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:49:11,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:49:11,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:49:11,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 18:49:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:11,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 18:49:11,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:49:11,203 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 18:49:11,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 18:49:11,245 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 18:49:11,245 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:49:11,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510813080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:11,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:49:11,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-26 18:49:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655525019] [2023-08-26 18:49:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:11,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:49:11,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:11,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:49:11,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:49:11,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 339 [2023-08-26 18:49:11,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 57 transitions, 197 flow. Second operand has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 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 18:49:11,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:11,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 339 [2023-08-26 18:49:11,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:11,603 INFO L124 PetriNetUnfolderBase]: 2343/4156 cut-off events. [2023-08-26 18:49:11,603 INFO L125 PetriNetUnfolderBase]: For 1706/1706 co-relation queries the response was YES. [2023-08-26 18:49:11,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9585 conditions, 4156 events. 2343/4156 cut-off events. For 1706/1706 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 25347 event pairs, 169 based on Foata normal form. 0/3846 useless extension candidates. Maximal degree in co-relation 8649. Up to 2934 conditions per place. [2023-08-26 18:49:11,617 INFO L140 encePairwiseOnDemand]: 332/339 looper letters, 82 selfloop transitions, 6 changer transitions 2/96 dead transitions. [2023-08-26 18:49:11,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 487 flow [2023-08-26 18:49:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:49:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:49:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 559 transitions. [2023-08-26 18:49:11,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41224188790560473 [2023-08-26 18:49:11,620 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 559 transitions. [2023-08-26 18:49:11,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 559 transitions. [2023-08-26 18:49:11,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:11,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 559 transitions. [2023-08-26 18:49:11,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.75) internal successors, (559), 4 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:11,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:11,623 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 339.0) internal successors, (1695), 5 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:11,623 INFO L175 Difference]: Start difference. First operand has 68 places, 57 transitions, 197 flow. Second operand 4 states and 559 transitions. [2023-08-26 18:49:11,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 487 flow [2023-08-26 18:49:11,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 483 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:49:11,627 INFO L231 Difference]: Finished difference. Result has 71 places, 59 transitions, 233 flow [2023-08-26 18:49:11,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=71, PETRI_TRANSITIONS=59} [2023-08-26 18:49:11,628 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2023-08-26 18:49:11,628 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 59 transitions, 233 flow [2023-08-26 18:49:11,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 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 18:49:11,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:11,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 18:49:11,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 18:49:11,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:49:11,835 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-08-26 18:49:11,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:11,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1181800089, now seen corresponding path program 1 times [2023-08-26 18:49:11,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:11,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315596629] [2023-08-26 18:49:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:11,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315596629] [2023-08-26 18:49:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315596629] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:49:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523488912] [2023-08-26 18:49:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:11,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:49:11,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:49:11,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:49:11,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 18:49:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:11,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 18:49:11,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:49:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:11,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:49:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:11,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523488912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:49:11,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:49:11,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-26 18:49:11,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087848210] [2023-08-26 18:49:11,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:49:11,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:49:11,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:11,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:49:11,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:49:12,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 339 [2023-08-26 18:49:12,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 233 flow. Second operand has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:12,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:12,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 339 [2023-08-26 18:49:12,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:12,097 INFO L124 PetriNetUnfolderBase]: 376/688 cut-off events. [2023-08-26 18:49:12,097 INFO L125 PetriNetUnfolderBase]: For 338/367 co-relation queries the response was YES. [2023-08-26 18:49:12,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1671 conditions, 688 events. 376/688 cut-off events. For 338/367 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3192 event pairs, 0 based on Foata normal form. 81/769 useless extension candidates. Maximal degree in co-relation 1661. Up to 450 conditions per place. [2023-08-26 18:49:12,099 INFO L140 encePairwiseOnDemand]: 336/339 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-26 18:49:12,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 264 flow [2023-08-26 18:49:12,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:49:12,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:49:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 789 transitions. [2023-08-26 18:49:12,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4654867256637168 [2023-08-26 18:49:12,102 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 789 transitions. [2023-08-26 18:49:12,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 789 transitions. [2023-08-26 18:49:12,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:12,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 789 transitions. [2023-08-26 18:49:12,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 157.8) internal successors, (789), 5 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:12,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:12,106 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 339.0) internal successors, (2034), 6 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:12,106 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 233 flow. Second operand 5 states and 789 transitions. [2023-08-26 18:49:12,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 264 flow [2023-08-26 18:49:12,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 226 flow, removed 10 selfloop flow, removed 8 redundant places. [2023-08-26 18:49:12,107 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2023-08-26 18:49:12,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=339, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2023-08-26 18:49:12,109 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -22 predicate places. [2023-08-26 18:49:12,109 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2023-08-26 18:49:12,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 150.44444444444446) internal successors, (1354), 9 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:12,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 31 remaining) [2023-08-26 18:49:12,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2023-08-26 18:49:12,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2023-08-26 18:49:12,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2023-08-26 18:49:12,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2023-08-26 18:49:12,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 31 remaining) [2023-08-26 18:49:12,110 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 31 remaining) [2023-08-26 18:49:12,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2023-08-26 18:49:12,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2023-08-26 18:49:12,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2023-08-26 18:49:12,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2023-08-26 18:49:12,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2023-08-26 18:49:12,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2023-08-26 18:49:12,111 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2023-08-26 18:49:12,112 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2023-08-26 18:49:12,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (7 of 31 remaining) [2023-08-26 18:49:12,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2023-08-26 18:49:12,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2023-08-26 18:49:12,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2023-08-26 18:49:12,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2023-08-26 18:49:12,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2023-08-26 18:49:12,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2023-08-26 18:49:12,113 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2023-08-26 18:49:12,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 18:49:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 18:49:12,322 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:49:12,323 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:49:12,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:12,352 INFO L124 PetriNetUnfolderBase]: 34/301 cut-off events. [2023-08-26 18:49:12,353 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:49:12,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 34/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1082 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2023-08-26 18:49:12,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:12,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:12,356 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:49:12,356 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:12,356 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:12,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 165 places, 180 transitions, 378 flow [2023-08-26 18:49:12,378 INFO L124 PetriNetUnfolderBase]: 34/301 cut-off events. [2023-08-26 18:49:12,378 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 18:49:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 301 events. 34/301 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1082 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 186. Up to 8 conditions per place. [2023-08-26 18:49:12,386 INFO L119 LiptonReduction]: Number of co-enabled transitions 12956 [2023-08-26 18:49:15,785 INFO L134 LiptonReduction]: Checked pairs total: 31640 [2023-08-26 18:49:15,785 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-26 18:49:15,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:49:15,786 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;@169f1d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:49:15,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:49:15,792 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:49:15,792 INFO L124 PetriNetUnfolderBase]: 12/79 cut-off events. [2023-08-26 18:49:15,792 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 18:49:15,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:15,792 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 18:49:15,793 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:49:15,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash 735773994, now seen corresponding path program 1 times [2023-08-26 18:49:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:15,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286873331] [2023-08-26 18:49:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:15,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:49:15,805 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:49:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:49:15,817 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:49:15,817 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:49:15,817 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:49:15,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 18:49:15,817 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:49:15,818 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:49:15,818 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:49:15,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 18:49:15,842 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 18:49:15,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 18:49:15,890 INFO L124 PetriNetUnfolderBase]: 54/455 cut-off events. [2023-08-26 18:49:15,891 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:49:15,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 455 events. 54/455 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1806 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2023-08-26 18:49:15,895 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 18:49:15,898 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 223 transitions, 476 flow [2023-08-26 18:49:15,898 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:49:15,898 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 223 transitions, 476 flow [2023-08-26 18:49:15,899 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 223 transitions, 476 flow [2023-08-26 18:49:15,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 18:49:15,945 INFO L124 PetriNetUnfolderBase]: 54/455 cut-off events. [2023-08-26 18:49:15,945 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:49:15,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 455 events. 54/455 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1806 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2023-08-26 18:49:15,964 INFO L119 LiptonReduction]: Number of co-enabled transitions 24846 [2023-08-26 18:49:19,328 INFO L134 LiptonReduction]: Checked pairs total: 71348 [2023-08-26 18:49:19,328 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-26 18:49:19,329 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:49:19,329 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;@169f1d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:49:19,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-08-26 18:49:19,330 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:49:19,330 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 18:49:19,330 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:49:19,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:19,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:49:19,330 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:49:19,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:19,330 INFO L85 PathProgramCache]: Analyzing trace with hash 52389, now seen corresponding path program 1 times [2023-08-26 18:49:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:19,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384310484] [2023-08-26 18:49:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:19,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:19,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384310484] [2023-08-26 18:49:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384310484] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:19,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:49:19,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:49:19,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330250023] [2023-08-26 18:49:19,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:19,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:49:19,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:19,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:49:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:49:19,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 408 [2023-08-26 18:49:19,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:19,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:19,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 408 [2023-08-26 18:49:19,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:35,189 INFO L124 PetriNetUnfolderBase]: 192998/267605 cut-off events. [2023-08-26 18:49:35,189 INFO L125 PetriNetUnfolderBase]: For 3319/3319 co-relation queries the response was YES. [2023-08-26 18:49:35,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535295 conditions, 267605 events. 192998/267605 cut-off events. For 3319/3319 co-relation queries the response was YES. Maximal size of possible extension queue 7386. Compared 2028012 event pairs, 178887 based on Foata normal form. 12868/178040 useless extension candidates. Maximal degree in co-relation 119058. Up to 246524 conditions per place. [2023-08-26 18:49:36,487 INFO L140 encePairwiseOnDemand]: 377/408 looper letters, 112 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-08-26 18:49:36,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 502 flow [2023-08-26 18:49:36,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:49:36,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:49:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 617 transitions. [2023-08-26 18:49:36,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040849673202614 [2023-08-26 18:49:36,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 617 transitions. [2023-08-26 18:49:36,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 617 transitions. [2023-08-26 18:49:36,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:36,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 617 transitions. [2023-08-26 18:49:36,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:36,493 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:36,494 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:36,494 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 240 flow. Second operand 3 states and 617 transitions. [2023-08-26 18:49:36,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 502 flow [2023-08-26 18:49:36,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 122 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:49:36,499 INFO L231 Difference]: Finished difference. Result has 82 places, 76 transitions, 186 flow [2023-08-26 18:49:36,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=82, PETRI_TRANSITIONS=76} [2023-08-26 18:49:36,500 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -6 predicate places. [2023-08-26 18:49:36,500 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 76 transitions, 186 flow [2023-08-26 18:49:36,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:36,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:36,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:49:36,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 18:49:36,501 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:49:36,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:36,501 INFO L85 PathProgramCache]: Analyzing trace with hash 52388, now seen corresponding path program 1 times [2023-08-26 18:49:36,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:36,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125509093] [2023-08-26 18:49:36,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:36,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:36,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:36,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125509093] [2023-08-26 18:49:36,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125509093] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:36,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:49:36,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:49:36,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43507367] [2023-08-26 18:49:36,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:36,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:49:36,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:49:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:49:36,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 408 [2023-08-26 18:49:36,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 76 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:36,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:36,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 408 [2023-08-26 18:49:36,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:49:47,542 INFO L124 PetriNetUnfolderBase]: 130453/187200 cut-off events. [2023-08-26 18:49:47,542 INFO L125 PetriNetUnfolderBase]: For 5627/5627 co-relation queries the response was YES. [2023-08-26 18:49:47,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372715 conditions, 187200 events. 130453/187200 cut-off events. For 5627/5627 co-relation queries the response was YES. Maximal size of possible extension queue 5436. Compared 1462934 event pairs, 85181 based on Foata normal form. 0/134458 useless extension candidates. Maximal degree in co-relation 342734. Up to 180150 conditions per place. [2023-08-26 18:49:48,411 INFO L140 encePairwiseOnDemand]: 404/408 looper letters, 75 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-26 18:49:48,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 91 transitions, 370 flow [2023-08-26 18:49:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:49:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:49:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-26 18:49:48,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199346405228758 [2023-08-26 18:49:48,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-26 18:49:48,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-26 18:49:48,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:49:48,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-26 18:49:48,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:48,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:48,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 408.0) internal successors, (1632), 4 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:48,417 INFO L175 Difference]: Start difference. First operand has 82 places, 76 transitions, 186 flow. Second operand 3 states and 514 transitions. [2023-08-26 18:49:48,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 91 transitions, 370 flow [2023-08-26 18:49:48,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 91 transitions, 366 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:49:48,796 INFO L231 Difference]: Finished difference. Result has 83 places, 77 transitions, 196 flow [2023-08-26 18:49:48,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=83, PETRI_TRANSITIONS=77} [2023-08-26 18:49:48,797 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -5 predicate places. [2023-08-26 18:49:48,797 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 77 transitions, 196 flow [2023-08-26 18:49:48,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:48,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:49:48,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:49:48,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 18:49:48,798 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:49:48,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:49:48,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1179671360, now seen corresponding path program 1 times [2023-08-26 18:49:48,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:49:48,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592930254] [2023-08-26 18:49:48,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:49:48,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:49:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:49:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:49:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:49:48,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592930254] [2023-08-26 18:49:48,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592930254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:49:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:49:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 18:49:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031589171] [2023-08-26 18:49:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:49:48,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 18:49:48,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:49:48,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 18:49:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 18:49:48,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 408 [2023-08-26 18:49:48,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 77 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:49:48,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:49:48,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 408 [2023-08-26 18:49:48,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:50:00,103 INFO L124 PetriNetUnfolderBase]: 140063/199588 cut-off events. [2023-08-26 18:50:00,104 INFO L125 PetriNetUnfolderBase]: For 9906/9906 co-relation queries the response was YES. [2023-08-26 18:50:00,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 405503 conditions, 199588 events. 140063/199588 cut-off events. For 9906/9906 co-relation queries the response was YES. Maximal size of possible extension queue 4714. Compared 1483907 event pairs, 82866 based on Foata normal form. 0/139636 useless extension candidates. Maximal degree in co-relation 404709. Up to 169756 conditions per place. [2023-08-26 18:50:01,260 INFO L140 encePairwiseOnDemand]: 402/408 looper letters, 176 selfloop transitions, 5 changer transitions 0/191 dead transitions. [2023-08-26 18:50:01,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 191 transitions, 813 flow [2023-08-26 18:50:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:50:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:50:01,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 911 transitions. [2023-08-26 18:50:01,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.372140522875817 [2023-08-26 18:50:01,263 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 911 transitions. [2023-08-26 18:50:01,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 911 transitions. [2023-08-26 18:50:01,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:50:01,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 911 transitions. [2023-08-26 18:50:01,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.83333333333334) internal successors, (911), 6 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:01,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:01,269 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:01,269 INFO L175 Difference]: Start difference. First operand has 83 places, 77 transitions, 196 flow. Second operand 6 states and 911 transitions. [2023-08-26 18:50:01,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 191 transitions, 813 flow [2023-08-26 18:50:01,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 191 transitions, 810 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:50:01,278 INFO L231 Difference]: Finished difference. Result has 84 places, 76 transitions, 202 flow [2023-08-26 18:50:01,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=84, PETRI_TRANSITIONS=76} [2023-08-26 18:50:01,278 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -4 predicate places. [2023-08-26 18:50:01,279 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 76 transitions, 202 flow [2023-08-26 18:50:01,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:01,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:01,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 18:50:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 18:50:01,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:50:01,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:01,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1179364512, now seen corresponding path program 1 times [2023-08-26 18:50:01,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:01,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663217090] [2023-08-26 18:50:01,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:01,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:50:01,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:50:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663217090] [2023-08-26 18:50:01,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663217090] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:50:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661143574] [2023-08-26 18:50:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:01,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:50:01,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:50:01,337 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:50:01,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 18:50:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:01,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 18:50:01,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:50:01,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 18:50:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:50:01,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:50:01,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:50:01,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661143574] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:50:01,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:50:01,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 18:50:01,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687224318] [2023-08-26 18:50:01,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:50:01,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 18:50:01,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:50:01,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 18:50:01,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:50:01,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 408 [2023-08-26 18:50:01,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 76 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 146.71428571428572) internal successors, (1027), 7 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:01,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:50:01,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 408 [2023-08-26 18:50:01,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:50:08,991 INFO L124 PetriNetUnfolderBase]: 96901/138068 cut-off events. [2023-08-26 18:50:08,992 INFO L125 PetriNetUnfolderBase]: For 14187/14187 co-relation queries the response was YES. [2023-08-26 18:50:09,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292718 conditions, 138068 events. 96901/138068 cut-off events. For 14187/14187 co-relation queries the response was YES. Maximal size of possible extension queue 3891. Compared 1083269 event pairs, 16 based on Foata normal form. 12/106525 useless extension candidates. Maximal degree in co-relation 242194. Up to 106660 conditions per place. [2023-08-26 18:50:09,635 INFO L140 encePairwiseOnDemand]: 404/408 looper letters, 171 selfloop transitions, 6 changer transitions 0/191 dead transitions. [2023-08-26 18:50:09,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 191 transitions, 796 flow [2023-08-26 18:50:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:50:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:50:09,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1049 transitions. [2023-08-26 18:50:09,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4285130718954248 [2023-08-26 18:50:09,637 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1049 transitions. [2023-08-26 18:50:09,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1049 transitions. [2023-08-26 18:50:09,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:50:09,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1049 transitions. [2023-08-26 18:50:09,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.83333333333334) internal successors, (1049), 6 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:09,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:09,643 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:09,643 INFO L175 Difference]: Start difference. First operand has 84 places, 76 transitions, 202 flow. Second operand 6 states and 1049 transitions. [2023-08-26 18:50:09,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 191 transitions, 796 flow [2023-08-26 18:50:09,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 191 transitions, 795 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:50:09,784 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 217 flow [2023-08-26 18:50:09,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=217, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-08-26 18:50:09,784 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -1 predicate places. [2023-08-26 18:50:09,784 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 217 flow [2023-08-26 18:50:09,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 146.71428571428572) internal successors, (1027), 7 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:09,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:09,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:50:09,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-26 18:50:09,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:50:09,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:50:09,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:09,990 INFO L85 PathProgramCache]: Analyzing trace with hash -2084893473, now seen corresponding path program 1 times [2023-08-26 18:50:09,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:09,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254607179] [2023-08-26 18:50:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:09,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:10,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:50:10,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:50:10,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254607179] [2023-08-26 18:50:10,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254607179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:50:10,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:50:10,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:50:10,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270470444] [2023-08-26 18:50:10,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:50:10,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:50:10,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:50:10,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:50:10,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:50:10,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 408 [2023-08-26 18:50:10,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:10,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:50:10,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 408 [2023-08-26 18:50:10,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:50:19,474 INFO L124 PetriNetUnfolderBase]: 119320/170262 cut-off events. [2023-08-26 18:50:19,474 INFO L125 PetriNetUnfolderBase]: For 29336/29336 co-relation queries the response was YES. [2023-08-26 18:50:19,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 359411 conditions, 170262 events. 119320/170262 cut-off events. For 29336/29336 co-relation queries the response was YES. Maximal size of possible extension queue 3782. Compared 1311056 event pairs, 6114 based on Foata normal form. 0/129918 useless extension candidates. Maximal degree in co-relation 281277. Up to 132486 conditions per place. [2023-08-26 18:50:20,316 INFO L140 encePairwiseOnDemand]: 396/408 looper letters, 192 selfloop transitions, 8 changer transitions 0/206 dead transitions. [2023-08-26 18:50:20,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 206 transitions, 913 flow [2023-08-26 18:50:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:50:20,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:50:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 803 transitions. [2023-08-26 18:50:20,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39362745098039215 [2023-08-26 18:50:20,318 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 803 transitions. [2023-08-26 18:50:20,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 803 transitions. [2023-08-26 18:50:20,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:50:20,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 803 transitions. [2023-08-26 18:50:20,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 160.6) internal successors, (803), 5 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:20,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 408.0) internal successors, (2448), 6 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:20,323 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 408.0) internal successors, (2448), 6 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:20,323 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 217 flow. Second operand 5 states and 803 transitions. [2023-08-26 18:50:20,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 206 transitions, 913 flow [2023-08-26 18:50:20,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 206 transitions, 886 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-26 18:50:20,508 INFO L231 Difference]: Finished difference. Result has 90 places, 80 transitions, 259 flow [2023-08-26 18:50:20,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=90, PETRI_TRANSITIONS=80} [2023-08-26 18:50:20,508 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 2 predicate places. [2023-08-26 18:50:20,508 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 80 transitions, 259 flow [2023-08-26 18:50:20,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.0) internal successors, (726), 6 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:20,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:20,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:50:20,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 18:50:20,509 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:50:20,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:20,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1410112097, now seen corresponding path program 1 times [2023-08-26 18:50:20,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:20,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629777557] [2023-08-26 18:50:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:20,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 18:50:20,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:50:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629777557] [2023-08-26 18:50:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629777557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:50:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792773709] [2023-08-26 18:50:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:20,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:50:20,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:50:20,633 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:50:20,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 18:50:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:20,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 18:50:20,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:50:20,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 18:50:20,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 18:50:20,782 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 18:50:20,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:50:20,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792773709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:50:20,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:50:20,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 18:50:20,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435406586] [2023-08-26 18:50:20,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:50:20,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:50:20,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:50:20,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:50:20,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:50:20,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 408 [2023-08-26 18:50:20,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 80 transitions, 259 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:20,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:50:20,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 408 [2023-08-26 18:50:20,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:50:27,339 INFO L124 PetriNetUnfolderBase]: 78069/113205 cut-off events. [2023-08-26 18:50:27,340 INFO L125 PetriNetUnfolderBase]: For 51402/51614 co-relation queries the response was YES. [2023-08-26 18:50:27,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252804 conditions, 113205 events. 78069/113205 cut-off events. For 51402/51614 co-relation queries the response was YES. Maximal size of possible extension queue 2932. Compared 834280 event pairs, 25472 based on Foata normal form. 2154/94098 useless extension candidates. Maximal degree in co-relation 235585. Up to 103609 conditions per place. [2023-08-26 18:50:27,934 INFO L140 encePairwiseOnDemand]: 404/408 looper letters, 112 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2023-08-26 18:50:27,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 648 flow [2023-08-26 18:50:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:50:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:50:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 683 transitions. [2023-08-26 18:50:27,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185049019607843 [2023-08-26 18:50:27,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 683 transitions. [2023-08-26 18:50:27,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 683 transitions. [2023-08-26 18:50:27,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:50:27,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 683 transitions. [2023-08-26 18:50:27,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 170.75) internal successors, (683), 4 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:27,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:27,939 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:27,939 INFO L175 Difference]: Start difference. First operand has 90 places, 80 transitions, 259 flow. Second operand 4 states and 683 transitions. [2023-08-26 18:50:27,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 648 flow [2023-08-26 18:50:27,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 126 transitions, 639 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:50:28,000 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 254 flow [2023-08-26 18:50:28,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2023-08-26 18:50:28,000 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 1 predicate places. [2023-08-26 18:50:28,000 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 254 flow [2023-08-26 18:50:28,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:28,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:28,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:50:28,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-26 18:50:28,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:50:28,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:50:28,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:28,206 INFO L85 PathProgramCache]: Analyzing trace with hash -763807791, now seen corresponding path program 1 times [2023-08-26 18:50:28,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:28,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631723935] [2023-08-26 18:50:28,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:28,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 18:50:28,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:50:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631723935] [2023-08-26 18:50:28,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631723935] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:50:28,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:50:28,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:50:28,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326310738] [2023-08-26 18:50:28,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:50:28,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:50:28,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:50:28,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:50:28,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:50:28,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 408 [2023-08-26 18:50:28,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 254 flow. Second operand has 6 states, 6 states have (on average 121.5) internal successors, (729), 6 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:28,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:50:28,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 408 [2023-08-26 18:50:28,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:50:35,492 INFO L124 PetriNetUnfolderBase]: 85708/124397 cut-off events. [2023-08-26 18:50:35,493 INFO L125 PetriNetUnfolderBase]: For 39097/39097 co-relation queries the response was YES. [2023-08-26 18:50:35,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279342 conditions, 124397 events. 85708/124397 cut-off events. For 39097/39097 co-relation queries the response was YES. Maximal size of possible extension queue 2669. Compared 930709 event pairs, 4698 based on Foata normal form. 0/105901 useless extension candidates. Maximal degree in co-relation 242931. Up to 85752 conditions per place. [2023-08-26 18:50:36,157 INFO L140 encePairwiseOnDemand]: 397/408 looper letters, 180 selfloop transitions, 10 changer transitions 0/196 dead transitions. [2023-08-26 18:50:36,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 196 transitions, 955 flow [2023-08-26 18:50:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 18:50:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 18:50:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 784 transitions. [2023-08-26 18:50:36,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843137254901961 [2023-08-26 18:50:36,159 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 784 transitions. [2023-08-26 18:50:36,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 784 transitions. [2023-08-26 18:50:36,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:50:36,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 784 transitions. [2023-08-26 18:50:36,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 156.8) internal successors, (784), 5 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:36,161 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 408.0) internal successors, (2448), 6 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:36,162 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 408.0) internal successors, (2448), 6 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:36,162 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 254 flow. Second operand 5 states and 784 transitions. [2023-08-26 18:50:36,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 196 transitions, 955 flow [2023-08-26 18:50:36,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 196 transitions, 951 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:50:36,314 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 339 flow [2023-08-26 18:50:36,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2023-08-26 18:50:36,315 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, 7 predicate places. [2023-08-26 18:50:36,315 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 339 flow [2023-08-26 18:50:36,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.5) internal successors, (729), 6 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:36,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:36,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 18:50:36,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 18:50:36,316 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:50:36,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:36,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1792209458, now seen corresponding path program 1 times [2023-08-26 18:50:36,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:36,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356522637] [2023-08-26 18:50:36,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:50:36,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:50:36,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356522637] [2023-08-26 18:50:36,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356522637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:50:36,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743770014] [2023-08-26 18:50:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:36,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:50:36,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:50:36,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:50:36,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 18:50:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:36,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 18:50:36,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:50:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:50:36,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 18:50:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:50:36,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743770014] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 18:50:36,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 18:50:36,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-08-26 18:50:36,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627732551] [2023-08-26 18:50:36,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 18:50:36,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 18:50:36,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:50:36,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 18:50:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-26 18:50:36,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 408 [2023-08-26 18:50:36,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 339 flow. Second operand has 9 states, 9 states have (on average 185.44444444444446) internal successors, (1669), 9 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:36,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:50:36,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 408 [2023-08-26 18:50:36,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:50:37,554 INFO L124 PetriNetUnfolderBase]: 8860/14225 cut-off events. [2023-08-26 18:50:37,555 INFO L125 PetriNetUnfolderBase]: For 10362/10692 co-relation queries the response was YES. [2023-08-26 18:50:37,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36601 conditions, 14225 events. 8860/14225 cut-off events. For 10362/10692 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 99151 event pairs, 980 based on Foata normal form. 1260/14284 useless extension candidates. Maximal degree in co-relation 36589. Up to 8686 conditions per place. [2023-08-26 18:50:37,640 INFO L140 encePairwiseOnDemand]: 405/408 looper letters, 85 selfloop transitions, 4 changer transitions 6/107 dead transitions. [2023-08-26 18:50:37,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 518 flow [2023-08-26 18:50:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 18:50:37,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 18:50:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1195 transitions. [2023-08-26 18:50:37,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4881535947712418 [2023-08-26 18:50:37,644 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1195 transitions. [2023-08-26 18:50:37,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1195 transitions. [2023-08-26 18:50:37,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:50:37,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1195 transitions. [2023-08-26 18:50:37,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:37,649 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:37,649 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 408.0) internal successors, (2856), 7 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:37,649 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 339 flow. Second operand 6 states and 1195 transitions. [2023-08-26 18:50:37,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 518 flow [2023-08-26 18:50:37,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 436 flow, removed 29 selfloop flow, removed 9 redundant places. [2023-08-26 18:50:37,668 INFO L231 Difference]: Finished difference. Result has 68 places, 46 transitions, 125 flow [2023-08-26 18:50:37,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=125, PETRI_PLACES=68, PETRI_TRANSITIONS=46} [2023-08-26 18:50:37,668 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -20 predicate places. [2023-08-26 18:50:37,668 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 46 transitions, 125 flow [2023-08-26 18:50:37,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 185.44444444444446) internal successors, (1669), 9 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:37,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:37,669 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:50:37,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 18:50:37,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-26 18:50:37,874 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:50:37,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:37,874 INFO L85 PathProgramCache]: Analyzing trace with hash 3050939, now seen corresponding path program 1 times [2023-08-26 18:50:37,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:37,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398777185] [2023-08-26 18:50:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:38,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-26 18:50:38,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:50:38,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398777185] [2023-08-26 18:50:38,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398777185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 18:50:38,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40008649] [2023-08-26 18:50:38,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:38,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 18:50:38,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:50:38,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 18:50:38,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 18:50:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:38,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 18:50:38,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 18:50:38,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 18:50:38,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 18:50:38,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-26 18:50:38,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 18:50:38,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40008649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:50:38,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 18:50:38,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-26 18:50:38,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037675326] [2023-08-26 18:50:38,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:50:38,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 18:50:38,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:50:38,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 18:50:38,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 18:50:38,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 408 [2023-08-26 18:50:38,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 46 transitions, 125 flow. Second operand has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:38,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:50:38,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 408 [2023-08-26 18:50:38,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:50:38,985 INFO L124 PetriNetUnfolderBase]: 9148/13465 cut-off events. [2023-08-26 18:50:38,985 INFO L125 PetriNetUnfolderBase]: For 4252/4252 co-relation queries the response was YES. [2023-08-26 18:50:39,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30701 conditions, 13465 events. 9148/13465 cut-off events. For 4252/4252 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 82083 event pairs, 1008 based on Foata normal form. 0/12553 useless extension candidates. Maximal degree in co-relation 30693. Up to 11440 conditions per place. [2023-08-26 18:50:39,065 INFO L140 encePairwiseOnDemand]: 404/408 looper letters, 55 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-26 18:50:39,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 282 flow [2023-08-26 18:50:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:50:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:50:39,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 641 transitions. [2023-08-26 18:50:39,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276960784313725 [2023-08-26 18:50:39,067 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 641 transitions. [2023-08-26 18:50:39,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 641 transitions. [2023-08-26 18:50:39,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:50:39,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 641 transitions. [2023-08-26 18:50:39,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.25) internal successors, (641), 4 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:39,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:39,070 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:39,070 INFO L175 Difference]: Start difference. First operand has 68 places, 46 transitions, 125 flow. Second operand 4 states and 641 transitions. [2023-08-26 18:50:39,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 282 flow [2023-08-26 18:50:39,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 64 transitions, 274 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 18:50:39,071 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 118 flow [2023-08-26 18:50:39,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-26 18:50:39,072 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -26 predicate places. [2023-08-26 18:50:39,072 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 118 flow [2023-08-26 18:50:39,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:39,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:39,072 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:50:39,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-26 18:50:39,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-26 18:50:39,273 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-08-26 18:50:39,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:39,274 INFO L85 PathProgramCache]: Analyzing trace with hash 94577332, now seen corresponding path program 1 times [2023-08-26 18:50:39,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:39,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118256681] [2023-08-26 18:50:39,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:39,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:39,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-26 18:50:39,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:50:39,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118256681] [2023-08-26 18:50:39,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118256681] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:50:39,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:50:39,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 18:50:39,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628431217] [2023-08-26 18:50:39,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:50:39,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 18:50:39,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:50:39,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 18:50:39,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 18:50:39,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 408 [2023-08-26 18:50:39,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 121.66666666666667) internal successors, (730), 6 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:39,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:50:39,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 408 [2023-08-26 18:50:39,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:50:40,208 INFO L124 PetriNetUnfolderBase]: 7544/11270 cut-off events. [2023-08-26 18:50:40,208 INFO L125 PetriNetUnfolderBase]: For 1830/1830 co-relation queries the response was YES. [2023-08-26 18:50:40,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25870 conditions, 11270 events. 7544/11270 cut-off events. For 1830/1830 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 66296 event pairs, 1230 based on Foata normal form. 363/11629 useless extension candidates. Maximal degree in co-relation 25862. Up to 8855 conditions per place. [2023-08-26 18:50:40,242 INFO L140 encePairwiseOnDemand]: 402/408 looper letters, 0 selfloop transitions, 0 changer transitions 62/62 dead transitions. [2023-08-26 18:50:40,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 62 transitions, 274 flow [2023-08-26 18:50:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 18:50:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 18:50:40,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 539 transitions. [2023-08-26 18:50:40,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33026960784313725 [2023-08-26 18:50:40,244 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 539 transitions. [2023-08-26 18:50:40,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 539 transitions. [2023-08-26 18:50:40,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:50:40,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 539 transitions. [2023-08-26 18:50:40,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:40,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:40,246 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 408.0) internal successors, (2040), 5 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:40,246 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 118 flow. Second operand 4 states and 539 transitions. [2023-08-26 18:50:40,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 62 transitions, 274 flow [2023-08-26 18:50:40,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 62 transitions, 271 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:50:40,249 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-26 18:50:40,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=408, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-26 18:50:40,249 INFO L281 CegarLoopForPetriNet]: 88 programPoint places, -29 predicate places. [2023-08-26 18:50:40,249 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-26 18:50:40,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 121.66666666666667) internal successors, (730), 6 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:40,249 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 39 remaining) [2023-08-26 18:50:40,249 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 39 remaining) [2023-08-26 18:50:40,250 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 39 remaining) [2023-08-26 18:50:40,251 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (9 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2023-08-26 18:50:40,252 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 39 remaining) [2023-08-26 18:50:40,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 18:50:40,253 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:50:40,253 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 18:50:40,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 18:50:40,281 INFO L124 PetriNetUnfolderBase]: 54/455 cut-off events. [2023-08-26 18:50:40,281 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:50:40,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 455 events. 54/455 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1806 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2023-08-26 18:50:40,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 18:50:40,287 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 223 transitions, 476 flow [2023-08-26 18:50:40,287 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:50:40,287 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 223 transitions, 476 flow [2023-08-26 18:50:40,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 223 transitions, 476 flow [2023-08-26 18:50:40,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 223 transitions, 476 flow [2023-08-26 18:50:40,316 INFO L124 PetriNetUnfolderBase]: 54/455 cut-off events. [2023-08-26 18:50:40,317 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 18:50:40,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 455 events. 54/455 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1806 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 309. Up to 16 conditions per place. [2023-08-26 18:50:40,328 INFO L119 LiptonReduction]: Number of co-enabled transitions 24846 [2023-08-26 18:50:43,763 INFO L134 LiptonReduction]: Checked pairs total: 71894 [2023-08-26 18:50:43,763 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-08-26 18:50:43,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 18:50:43,765 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;@169f1d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:50:43,765 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 18:50:43,771 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:50:43,771 INFO L124 PetriNetUnfolderBase]: 22/128 cut-off events. [2023-08-26 18:50:43,772 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-26 18:50:43,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:43,772 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 18:50:43,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 18:50:43,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1658182310, now seen corresponding path program 1 times [2023-08-26 18:50:43,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:43,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076598343] [2023-08-26 18:50:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:43,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:50:43,783 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 18:50:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 18:50:43,804 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 18:50:43,804 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 18:50:43,804 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 18:50:43,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 18:50:43,804 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-26 18:50:43,806 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 18:50:43,806 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 18:50:43,806 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 18:50:43,841 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 18:50:43,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 266 transitions, 576 flow [2023-08-26 18:50:43,914 INFO L124 PetriNetUnfolderBase]: 86/685 cut-off events. [2023-08-26 18:50:43,915 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 18:50:43,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 685 events. 86/685 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3050 event pairs, 6 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 475. Up to 32 conditions per place. [2023-08-26 18:50:43,924 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 266 transitions, 576 flow [2023-08-26 18:50:43,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 266 transitions, 576 flow [2023-08-26 18:50:43,936 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:50:43,936 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 241 places, 266 transitions, 576 flow [2023-08-26 18:50:43,937 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 241 places, 266 transitions, 576 flow [2023-08-26 18:50:43,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 266 transitions, 576 flow [2023-08-26 18:50:44,077 INFO L124 PetriNetUnfolderBase]: 86/685 cut-off events. [2023-08-26 18:50:44,078 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 18:50:44,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 740 conditions, 685 events. 86/685 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3050 event pairs, 6 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 475. Up to 32 conditions per place. [2023-08-26 18:50:44,099 INFO L119 LiptonReduction]: Number of co-enabled transitions 40344 [2023-08-26 18:50:47,897 INFO L134 LiptonReduction]: Checked pairs total: 113443 [2023-08-26 18:50:47,897 INFO L136 LiptonReduction]: Total number of compositions: 223 [2023-08-26 18:50:47,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:50:47,898 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;@169f1d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:50:47,898 INFO L358 AbstractCegarLoop]: Starting to check reachability of 47 error locations. [2023-08-26 18:50:47,899 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:50:47,899 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 18:50:47,899 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:50:47,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:50:47,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:50:47,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 44 more)] === [2023-08-26 18:50:47,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:50:47,900 INFO L85 PathProgramCache]: Analyzing trace with hash 75318, now seen corresponding path program 1 times [2023-08-26 18:50:47,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:50:47,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004027100] [2023-08-26 18:50:47,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:50:47,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:50:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:50:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 18:50:47,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:50:47,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004027100] [2023-08-26 18:50:47,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004027100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:50:47,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:50:47,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:50:47,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345944750] [2023-08-26 18:50:47,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:50:47,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:50:47,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:50:47,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:50:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:50:47,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 489 [2023-08-26 18:50:47,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 131 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:50:47,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:50:47,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 489 [2023-08-26 18:50:47,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand