/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/weaver/parallel-misc-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:51:08,401 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:51:08,475 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 19:51:08,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:51:08,485 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:51:08,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:51:08,517 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:51:08,518 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:51:08,518 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:51:08,522 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:51:08,522 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:51:08,522 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:51:08,523 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:51:08,524 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:51:08,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:51:08,524 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:51:08,524 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:51:08,525 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:51:08,525 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:51:08,525 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:51:08,525 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:51:08,533 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:51:08,533 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:51:08,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:51:08,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:51:08,534 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:51:08,534 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:51:08,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:51:08,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:51:08,535 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:51:08,535 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:51:08,535 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:51:08,535 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:51:08,535 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:51:08,536 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:51:08,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:51:08,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:51:08,861 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:51:08,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:51:08,864 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:51:08,864 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:51:08,865 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-26 19:51:10,089 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:51:10,316 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:51:10,316 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-2.wvr.c [2023-08-26 19:51:10,322 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f7412fbd/78ed335ba1e74f50a596d1cc5ab2e1f4/FLAG39b4ca0af [2023-08-26 19:51:10,332 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f7412fbd/78ed335ba1e74f50a596d1cc5ab2e1f4 [2023-08-26 19:51:10,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:51:10,335 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:51:10,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:51:10,336 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:51:10,338 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:51:10,339 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68f820ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10, skipping insertion in model container [2023-08-26 19:51:10,340 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,357 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:51:10,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:51:10,511 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:51:10,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:51:10,534 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:51:10,535 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 19:51:10,541 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:51:10,541 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10 WrapperNode [2023-08-26 19:51:10,541 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:51:10,542 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:51:10,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:51:10,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:51:10,547 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,553 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,568 INFO L138 Inliner]: procedures = 21, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-08-26 19:51:10,568 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:51:10,569 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:51:10,569 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:51:10,569 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:51:10,577 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,577 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,579 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,579 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,584 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,589 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,591 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:51:10,592 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:51:10,592 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:51:10,592 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:51:10,593 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (1/1) ... [2023-08-26 19:51:10,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:51:10,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:10,617 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 19:51:10,624 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 19:51:10,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:51:10,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 19:51:10,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 19:51:10,654 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 19:51:10,654 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 19:51:10,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:51:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:51:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:51:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 19:51:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 19:51:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:51:10,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:51:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:51:10,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:51:10,657 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 19:51:10,739 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:51:10,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:51:11,014 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:51:11,031 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:51:11,031 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 19:51:11,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:51:11 BoogieIcfgContainer [2023-08-26 19:51:11,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:51:11,035 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:51:11,035 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:51:11,038 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:51:11,038 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:51:10" (1/3) ... [2023-08-26 19:51:11,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27721274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:51:11, skipping insertion in model container [2023-08-26 19:51:11,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:51:10" (2/3) ... [2023-08-26 19:51:11,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27721274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:51:11, skipping insertion in model container [2023-08-26 19:51:11,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:51:11" (3/3) ... [2023-08-26 19:51:11,044 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-2.wvr.c [2023-08-26 19:51:11,060 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:51:11,060 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 19:51:11,060 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:51:11,148 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 19:51:11,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 112 transitions, 240 flow [2023-08-26 19:51:11,256 INFO L124 PetriNetUnfolderBase]: 8/110 cut-off events. [2023-08-26 19:51:11,257 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:11,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119 conditions, 110 events. 8/110 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 97 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-08-26 19:51:11,261 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 112 transitions, 240 flow [2023-08-26 19:51:11,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 101 transitions, 214 flow [2023-08-26 19:51:11,270 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:51:11,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 101 transitions, 214 flow [2023-08-26 19:51:11,295 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 101 transitions, 214 flow [2023-08-26 19:51:11,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 101 transitions, 214 flow [2023-08-26 19:51:11,334 INFO L124 PetriNetUnfolderBase]: 8/101 cut-off events. [2023-08-26 19:51:11,334 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:11,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 101 events. 8/101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 96 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-08-26 19:51:11,337 INFO L119 LiptonReduction]: Number of co-enabled transitions 936 [2023-08-26 19:51:14,824 INFO L134 LiptonReduction]: Checked pairs total: 1300 [2023-08-26 19:51:14,825 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-26 19:51:14,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:51:14,841 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;@6e8056bf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:51:14,841 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 19:51:14,842 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:51:14,842 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 19:51:14,842 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:14,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:14,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 19:51:14,843 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:14,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash 442, now seen corresponding path program 1 times [2023-08-26 19:51:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:14,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233464609] [2023-08-26 19:51:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:14,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:14,913 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 19:51:14,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:14,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233464609] [2023-08-26 19:51:14,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233464609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:14,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:14,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 19:51:14,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447430911] [2023-08-26 19:51:14,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:14,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 19:51:14,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:14,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 19:51:14,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 19:51:14,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 229 [2023-08-26 19:51:14,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 54 flow. Second operand has 2 states, 2 states have (on average 101.5) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:14,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:14,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 229 [2023-08-26 19:51:14,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:14,988 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-26 19:51:14,988 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:51:14,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 80 events. 45/80 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 148 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 124. Up to 81 conditions per place. [2023-08-26 19:51:14,990 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 19 selfloop transitions, 0 changer transitions 0/19 dead transitions. [2023-08-26 19:51:14,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 19 transitions, 88 flow [2023-08-26 19:51:14,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 19:51:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 19:51:14,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2023-08-26 19:51:15,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868995633187773 [2023-08-26 19:51:15,002 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2023-08-26 19:51:15,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2023-08-26 19:51:15,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:15,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2023-08-26 19:51:15,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,011 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,012 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 54 flow. Second operand 2 states and 223 transitions. [2023-08-26 19:51:15,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 19 transitions, 88 flow [2023-08-26 19:51:15,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 19 transitions, 80 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 19:51:15,016 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 42 flow [2023-08-26 19:51:15,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-08-26 19:51:15,020 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 19:51:15,020 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 42 flow [2023-08-26 19:51:15,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 101.5) internal successors, (203), 2 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:15,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:51:15,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:51:15,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:15,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:15,022 INFO L85 PathProgramCache]: Analyzing trace with hash 433229, now seen corresponding path program 1 times [2023-08-26 19:51:15,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:15,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410105359] [2023-08-26 19:51:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:15,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:15,135 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 19:51:15,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:15,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410105359] [2023-08-26 19:51:15,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410105359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:15,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:15,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:15,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627218004] [2023-08-26 19:51:15,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:15,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:15,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:15,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:15,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:15,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 229 [2023-08-26 19:51:15,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:15,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 229 [2023-08-26 19:51:15,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:15,167 INFO L124 PetriNetUnfolderBase]: 41/72 cut-off events. [2023-08-26 19:51:15,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:15,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 72 events. 41/72 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 128 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 147. Up to 72 conditions per place. [2023-08-26 19:51:15,168 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 19:51:15,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 17 transitions, 72 flow [2023-08-26 19:51:15,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:15,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 19:51:15,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38573508005822416 [2023-08-26 19:51:15,171 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 19:51:15,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 19:51:15,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:15,171 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 19:51:15,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,175 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,175 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 42 flow. Second operand 3 states and 265 transitions. [2023-08-26 19:51:15,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 17 transitions, 72 flow [2023-08-26 19:51:15,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:51:15,175 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 40 flow [2023-08-26 19:51:15,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-26 19:51:15,176 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 19:51:15,176 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 40 flow [2023-08-26 19:51:15,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:15,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:51:15,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 19:51:15,177 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:15,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:15,178 INFO L85 PathProgramCache]: Analyzing trace with hash 433230, now seen corresponding path program 1 times [2023-08-26 19:51:15,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:15,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607763671] [2023-08-26 19:51:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:15,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:15,274 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 19:51:15,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:15,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607763671] [2023-08-26 19:51:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607763671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:15,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:15,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:15,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494934740] [2023-08-26 19:51:15,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:15,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:15,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:15,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 229 [2023-08-26 19:51:15,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 40 flow. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:15,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 229 [2023-08-26 19:51:15,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:15,314 INFO L124 PetriNetUnfolderBase]: 37/64 cut-off events. [2023-08-26 19:51:15,314 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:15,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 64 events. 37/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 110 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 132. Up to 64 conditions per place. [2023-08-26 19:51:15,315 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 19:51:15,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 19:51:15,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:15,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:15,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 269 transitions. [2023-08-26 19:51:15,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915574963609898 [2023-08-26 19:51:15,320 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 269 transitions. [2023-08-26 19:51:15,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 269 transitions. [2023-08-26 19:51:15,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:15,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 269 transitions. [2023-08-26 19:51:15,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,325 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,325 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 40 flow. Second operand 3 states and 269 transitions. [2023-08-26 19:51:15,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 19:51:15,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 15 transitions, 65 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:15,326 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 37 flow [2023-08-26 19:51:15,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=37, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-08-26 19:51:15,327 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 19:51:15,327 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 37 flow [2023-08-26 19:51:15,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:15,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:51:15,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:51:15,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:15,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash 416341460, now seen corresponding path program 1 times [2023-08-26 19:51:15,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:15,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347397334] [2023-08-26 19:51:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:15,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:15,410 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 19:51:15,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:15,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347397334] [2023-08-26 19:51:15,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347397334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:15,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:15,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:51:15,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898223910] [2023-08-26 19:51:15,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:15,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:15,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:15,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:15,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:51:15,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 229 [2023-08-26 19:51:15,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 37 flow. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:15,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 229 [2023-08-26 19:51:15,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:15,444 INFO L124 PetriNetUnfolderBase]: 29/52 cut-off events. [2023-08-26 19:51:15,445 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:15,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 52 events. 29/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 75 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 109. Up to 52 conditions per place. [2023-08-26 19:51:15,445 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 13 selfloop transitions, 1 changer transitions 0/14 dead transitions. [2023-08-26 19:51:15,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 14 transitions, 63 flow [2023-08-26 19:51:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2023-08-26 19:51:15,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36681222707423583 [2023-08-26 19:51:15,448 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 252 transitions. [2023-08-26 19:51:15,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 252 transitions. [2023-08-26 19:51:15,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:15,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 252 transitions. [2023-08-26 19:51:15,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,451 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 37 flow. Second operand 3 states and 252 transitions. [2023-08-26 19:51:15,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 14 transitions, 63 flow [2023-08-26 19:51:15,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 14 transitions, 62 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:15,452 INFO L231 Difference]: Finished difference. Result has 20 places, 14 transitions, 36 flow [2023-08-26 19:51:15,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=14} [2023-08-26 19:51:15,452 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 19:51:15,453 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 14 transitions, 36 flow [2023-08-26 19:51:15,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 4 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:15,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:51:15,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 19:51:15,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:15,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash 416341461, now seen corresponding path program 1 times [2023-08-26 19:51:15,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:15,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778205253] [2023-08-26 19:51:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:15,530 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 19:51:15,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:15,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778205253] [2023-08-26 19:51:15,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778205253] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:15,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:15,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221688946] [2023-08-26 19:51:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:15,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:15,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 229 [2023-08-26 19:51:15,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:15,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 229 [2023-08-26 19:51:15,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:15,553 INFO L124 PetriNetUnfolderBase]: 21/40 cut-off events. [2023-08-26 19:51:15,553 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:51:15,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 40 events. 21/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 86. Up to 40 conditions per place. [2023-08-26 19:51:15,554 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 19:51:15,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 60 flow [2023-08-26 19:51:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:15,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-08-26 19:51:15,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38719068413391555 [2023-08-26 19:51:15,557 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-08-26 19:51:15,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-08-26 19:51:15,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:15,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-08-26 19:51:15,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,560 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,560 INFO L175 Difference]: Start difference. First operand has 20 places, 14 transitions, 36 flow. Second operand 3 states and 266 transitions. [2023-08-26 19:51:15,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 60 flow [2023-08-26 19:51:15,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 59 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:15,560 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 35 flow [2023-08-26 19:51:15,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=35, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-08-26 19:51:15,561 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 19:51:15,561 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 35 flow [2023-08-26 19:51:15,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:15,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:51:15,562 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:15,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2020183612, now seen corresponding path program 1 times [2023-08-26 19:51:15,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:15,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953595171] [2023-08-26 19:51:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:15,754 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 19:51:15,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953595171] [2023-08-26 19:51:15,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953595171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:15,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:15,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:51:15,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846884699] [2023-08-26 19:51:15,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:15,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:51:15,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:15,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:51:15,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:51:15,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 229 [2023-08-26 19:51:15,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 35 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:15,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 229 [2023-08-26 19:51:15,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:15,799 INFO L124 PetriNetUnfolderBase]: 41/77 cut-off events. [2023-08-26 19:51:15,799 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:51:15,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 77 events. 41/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 9 based on Foata normal form. 1/54 useless extension candidates. Maximal degree in co-relation 163. Up to 51 conditions per place. [2023-08-26 19:51:15,800 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 19 selfloop transitions, 3 changer transitions 1/23 dead transitions. [2023-08-26 19:51:15,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 23 transitions, 104 flow [2023-08-26 19:51:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:51:15,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:51:15,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2023-08-26 19:51:15,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497816593886463 [2023-08-26 19:51:15,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2023-08-26 19:51:15,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2023-08-26 19:51:15,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:15,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2023-08-26 19:51:15,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,805 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,805 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 35 flow. Second operand 3 states and 309 transitions. [2023-08-26 19:51:15,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 23 transitions, 104 flow [2023-08-26 19:51:15,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 103 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:15,806 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 53 flow [2023-08-26 19:51:15,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 19:51:15,809 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -4 predicate places. [2023-08-26 19:51:15,811 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 53 flow [2023-08-26 19:51:15,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:15,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:15,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:15,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 19:51:15,813 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:15,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1330109397, now seen corresponding path program 1 times [2023-08-26 19:51:15,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:15,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142391865] [2023-08-26 19:51:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:15,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:15,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142391865] [2023-08-26 19:51:15,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142391865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:15,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:15,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:51:15,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099054693] [2023-08-26 19:51:15,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:15,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:15,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:15,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:15,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:51:15,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 229 [2023-08-26 19:51:15,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 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 19:51:15,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:15,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 229 [2023-08-26 19:51:15,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:16,064 INFO L124 PetriNetUnfolderBase]: 49/99 cut-off events. [2023-08-26 19:51:16,064 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-26 19:51:16,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 99 events. 49/99 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 275 event pairs, 5 based on Foata normal form. 8/107 useless extension candidates. Maximal degree in co-relation 244. Up to 47 conditions per place. [2023-08-26 19:51:16,065 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 29 selfloop transitions, 7 changer transitions 2/38 dead transitions. [2023-08-26 19:51:16,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 38 transitions, 193 flow [2023-08-26 19:51:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:51:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:51:16,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 466 transitions. [2023-08-26 19:51:16,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069868995633188 [2023-08-26 19:51:16,068 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 466 transitions. [2023-08-26 19:51:16,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 466 transitions. [2023-08-26 19:51:16,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:16,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 466 transitions. [2023-08-26 19:51:16,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 93.2) internal successors, (466), 5 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:16,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:16,072 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:16,073 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 53 flow. Second operand 5 states and 466 transitions. [2023-08-26 19:51:16,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 38 transitions, 193 flow [2023-08-26 19:51:16,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:16,078 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 106 flow [2023-08-26 19:51:16,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-08-26 19:51:16,080 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2023-08-26 19:51:16,080 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 106 flow [2023-08-26 19:51:16,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 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 19:51:16,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:16,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:16,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 19:51:16,082 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:16,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:16,083 INFO L85 PathProgramCache]: Analyzing trace with hash -300748447, now seen corresponding path program 2 times [2023-08-26 19:51:16,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:16,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552755285] [2023-08-26 19:51:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:16,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:16,282 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 19:51:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552755285] [2023-08-26 19:51:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552755285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:16,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481109609] [2023-08-26 19:51:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:51:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:16,289 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 19:51:16,296 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 19:51:16,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:51:16,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:16,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 19:51:16,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:16,533 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 19:51:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481109609] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:16,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 19:51:16,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-26 19:51:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534957879] [2023-08-26 19:51:16,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:16,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:16,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:16,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:51:16,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-26 19:51:16,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:16,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:16,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-26 19:51:16,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:16,588 INFO L124 PetriNetUnfolderBase]: 45/93 cut-off events. [2023-08-26 19:51:16,588 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-26 19:51:16,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315 conditions, 93 events. 45/93 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 230 event pairs, 11 based on Foata normal form. 4/97 useless extension candidates. Maximal degree in co-relation 307. Up to 59 conditions per place. [2023-08-26 19:51:16,589 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 20 selfloop transitions, 6 changer transitions 6/32 dead transitions. [2023-08-26 19:51:16,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 32 transitions, 211 flow [2023-08-26 19:51:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 19:51:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 19:51:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 352 transitions. [2023-08-26 19:51:16,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38427947598253276 [2023-08-26 19:51:16,591 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 352 transitions. [2023-08-26 19:51:16,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 352 transitions. [2023-08-26 19:51:16,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:16,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 352 transitions. [2023-08-26 19:51:16,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 88.0) internal successors, (352), 4 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:16,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:16,594 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 229.0) internal successors, (1145), 5 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:16,594 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 106 flow. Second operand 4 states and 352 transitions. [2023-08-26 19:51:16,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 32 transitions, 211 flow [2023-08-26 19:51:16,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 211 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:51:16,596 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 123 flow [2023-08-26 19:51:16,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-26 19:51:16,597 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 6 predicate places. [2023-08-26 19:51:16,597 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 123 flow [2023-08-26 19:51:16,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:16,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:16,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:16,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 19:51:16,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:16,803 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:16,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:16,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1850126546, now seen corresponding path program 1 times [2023-08-26 19:51:16,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:16,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67862149] [2023-08-26 19:51:16,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:16,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:16,939 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 19:51:16,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:16,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67862149] [2023-08-26 19:51:16,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67862149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:16,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441396664] [2023-08-26 19:51:16,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:16,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:16,943 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 19:51:16,944 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 19:51:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:17,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 19:51:17,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:17,190 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 19:51:17,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:17,290 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 19:51:17,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441396664] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:17,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:17,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 19:51:17,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292143039] [2023-08-26 19:51:17,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:17,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:51:17,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:17,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:51:17,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:51:17,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-26 19:51:17,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 123 flow. Second operand has 7 states, 7 states have (on average 84.71428571428571) internal successors, (593), 7 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:17,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:17,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-26 19:51:17,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:17,422 INFO L124 PetriNetUnfolderBase]: 67/137 cut-off events. [2023-08-26 19:51:17,422 INFO L125 PetriNetUnfolderBase]: For 199/199 co-relation queries the response was YES. [2023-08-26 19:51:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524 conditions, 137 events. 67/137 cut-off events. For 199/199 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 400 event pairs, 2 based on Foata normal form. 20/157 useless extension candidates. Maximal degree in co-relation 514. Up to 65 conditions per place. [2023-08-26 19:51:17,423 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 35 selfloop transitions, 10 changer transitions 4/49 dead transitions. [2023-08-26 19:51:17,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 49 transitions, 352 flow [2023-08-26 19:51:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:51:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:51:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 532 transitions. [2023-08-26 19:51:17,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38719068413391555 [2023-08-26 19:51:17,426 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 532 transitions. [2023-08-26 19:51:17,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 532 transitions. [2023-08-26 19:51:17,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:17,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 532 transitions. [2023-08-26 19:51:17,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 88.66666666666667) internal successors, (532), 6 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:17,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:17,430 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:17,430 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 123 flow. Second operand 6 states and 532 transitions. [2023-08-26 19:51:17,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 49 transitions, 352 flow [2023-08-26 19:51:17,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 49 transitions, 321 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 19:51:17,432 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 186 flow [2023-08-26 19:51:17,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-26 19:51:17,433 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 11 predicate places. [2023-08-26 19:51:17,433 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 186 flow [2023-08-26 19:51:17,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 84.71428571428571) internal successors, (593), 7 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:17,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:17,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:17,442 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 19:51:17,634 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 19:51:17,634 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:17,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:17,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1899834078, now seen corresponding path program 2 times [2023-08-26 19:51:17,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:17,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501877006] [2023-08-26 19:51:17,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:17,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:17,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:17,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501877006] [2023-08-26 19:51:17,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501877006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:51:17,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:51:17,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 19:51:17,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667708943] [2023-08-26 19:51:17,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:51:17,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:51:17,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:17,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:51:17,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:51:17,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 229 [2023-08-26 19:51:17,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 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 19:51:17,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:17,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 229 [2023-08-26 19:51:17,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:17,795 INFO L124 PetriNetUnfolderBase]: 69/141 cut-off events. [2023-08-26 19:51:17,796 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2023-08-26 19:51:17,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 606 conditions, 141 events. 69/141 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 404 event pairs, 9 based on Foata normal form. 2/143 useless extension candidates. Maximal degree in co-relation 594. Up to 62 conditions per place. [2023-08-26 19:51:17,797 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 35 selfloop transitions, 8 changer transitions 2/45 dead transitions. [2023-08-26 19:51:17,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 45 transitions, 381 flow [2023-08-26 19:51:17,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:51:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:51:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 462 transitions. [2023-08-26 19:51:17,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4034934497816594 [2023-08-26 19:51:17,799 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 462 transitions. [2023-08-26 19:51:17,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 462 transitions. [2023-08-26 19:51:17,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:17,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 462 transitions. [2023-08-26 19:51:17,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.4) internal successors, (462), 5 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:17,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:17,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:17,803 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 186 flow. Second operand 5 states and 462 transitions. [2023-08-26 19:51:17,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 45 transitions, 381 flow [2023-08-26 19:51:17,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 45 transitions, 360 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-26 19:51:17,807 INFO L231 Difference]: Finished difference. Result has 42 places, 29 transitions, 221 flow [2023-08-26 19:51:17,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=42, PETRI_TRANSITIONS=29} [2023-08-26 19:51:17,807 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2023-08-26 19:51:17,808 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 29 transitions, 221 flow [2023-08-26 19:51:17,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 4 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 19:51:17,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:17,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:17,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 19:51:17,808 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:17,809 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:17,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1304540752, now seen corresponding path program 1 times [2023-08-26 19:51:17,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:17,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792619982] [2023-08-26 19:51:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:17,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:18,063 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:18,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:18,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792619982] [2023-08-26 19:51:18,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792619982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:18,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581089405] [2023-08-26 19:51:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:18,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:18,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:18,065 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 19:51:18,088 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 19:51:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:18,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 19:51:18,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:51:18,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:51:18,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581089405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:18,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:18,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2023-08-26 19:51:18,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381326289] [2023-08-26 19:51:18,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:18,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:51:18,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:18,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:51:18,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:51:18,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-26 19:51:18,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 29 transitions, 221 flow. Second operand has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:18,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:18,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-26 19:51:18,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:18,816 INFO L124 PetriNetUnfolderBase]: 151/294 cut-off events. [2023-08-26 19:51:18,816 INFO L125 PetriNetUnfolderBase]: For 911/911 co-relation queries the response was YES. [2023-08-26 19:51:18,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1360 conditions, 294 events. 151/294 cut-off events. For 911/911 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1095 event pairs, 8 based on Foata normal form. 24/318 useless extension candidates. Maximal degree in co-relation 1345. Up to 121 conditions per place. [2023-08-26 19:51:18,819 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 69 selfloop transitions, 25 changer transitions 0/94 dead transitions. [2023-08-26 19:51:18,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 94 transitions, 818 flow [2023-08-26 19:51:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 19:51:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 19:51:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1206 transitions. [2023-08-26 19:51:18,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37616968184653776 [2023-08-26 19:51:18,824 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1206 transitions. [2023-08-26 19:51:18,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1206 transitions. [2023-08-26 19:51:18,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:18,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1206 transitions. [2023-08-26 19:51:18,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.14285714285714) internal successors, (1206), 14 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:18,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:18,835 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:18,835 INFO L175 Difference]: Start difference. First operand has 42 places, 29 transitions, 221 flow. Second operand 14 states and 1206 transitions. [2023-08-26 19:51:18,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 94 transitions, 818 flow [2023-08-26 19:51:18,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 814 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-26 19:51:18,839 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 504 flow [2023-08-26 19:51:18,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=504, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-08-26 19:51:18,840 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 35 predicate places. [2023-08-26 19:51:18,840 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 504 flow [2023-08-26 19:51:18,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.0) internal successors, (840), 10 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:18,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:18,841 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:18,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 19:51:19,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:19,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:19,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:19,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1051645930, now seen corresponding path program 2 times [2023-08-26 19:51:19,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:19,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143480655] [2023-08-26 19:51:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:19,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:19,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:19,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143480655] [2023-08-26 19:51:19,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143480655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:19,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083319098] [2023-08-26 19:51:19,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:51:19,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:19,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:19,857 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 19:51:19,859 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 19:51:19,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:51:19,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:19,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 19:51:19,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:20,453 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 19:51:20,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:21,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083319098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:21,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:21,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2023-08-26 19:51:21,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683946977] [2023-08-26 19:51:21,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:21,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:51:21,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:21,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:51:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-26 19:51:21,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:51:21,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 504 flow. Second operand has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:21,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:21,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:51:21,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:22,525 INFO L124 PetriNetUnfolderBase]: 298/596 cut-off events. [2023-08-26 19:51:22,525 INFO L125 PetriNetUnfolderBase]: For 3335/3335 co-relation queries the response was YES. [2023-08-26 19:51:22,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 596 events. 298/596 cut-off events. For 3335/3335 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2927 event pairs, 4 based on Foata normal form. 5/601 useless extension candidates. Maximal degree in co-relation 3124. Up to 233 conditions per place. [2023-08-26 19:51:22,531 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 82 selfloop transitions, 79 changer transitions 6/167 dead transitions. [2023-08-26 19:51:22,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 167 transitions, 1744 flow [2023-08-26 19:51:22,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 19:51:22,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 19:51:22,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1461 transitions. [2023-08-26 19:51:22,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33578487703976095 [2023-08-26 19:51:22,537 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1461 transitions. [2023-08-26 19:51:22,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1461 transitions. [2023-08-26 19:51:22,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:22,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1461 transitions. [2023-08-26 19:51:22,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 76.89473684210526) internal successors, (1461), 19 states have internal predecessors, (1461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:22,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 229.0) internal successors, (4580), 20 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:22,567 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 229.0) internal successors, (4580), 20 states have internal predecessors, (4580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:22,567 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 504 flow. Second operand 19 states and 1461 transitions. [2023-08-26 19:51:22,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 167 transitions, 1744 flow [2023-08-26 19:51:22,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 167 transitions, 1549 flow, removed 79 selfloop flow, removed 4 redundant places. [2023-08-26 19:51:22,580 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 1225 flow [2023-08-26 19:51:22,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1225, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2023-08-26 19:51:22,581 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 55 predicate places. [2023-08-26 19:51:22,581 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 1225 flow [2023-08-26 19:51:22,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.3076923076923) internal successors, (953), 13 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:22,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:22,582 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:22,588 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 19:51:22,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:22,788 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:22,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:22,788 INFO L85 PathProgramCache]: Analyzing trace with hash -144679002, now seen corresponding path program 3 times [2023-08-26 19:51:22,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:22,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711906675] [2023-08-26 19:51:22,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:22,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:22,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:23,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:51:23,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:23,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711906675] [2023-08-26 19:51:23,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711906675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:23,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237127939] [2023-08-26 19:51:23,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:51:23,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:23,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:23,533 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 19:51:23,537 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 19:51:23,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 19:51:23,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:23,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 19:51:23,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:24,286 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 19:51:24,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:24,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:24,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237127939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:24,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:24,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2023-08-26 19:51:24,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719248996] [2023-08-26 19:51:24,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:24,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:51:24,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:24,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:51:24,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-08-26 19:51:24,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:51:24,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 1225 flow. Second operand has 13 states, 13 states have (on average 73.6923076923077) internal successors, (958), 13 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:24,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:51:24,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:26,584 INFO L124 PetriNetUnfolderBase]: 404/818 cut-off events. [2023-08-26 19:51:26,584 INFO L125 PetriNetUnfolderBase]: For 6421/6421 co-relation queries the response was YES. [2023-08-26 19:51:26,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 818 events. 404/818 cut-off events. For 6421/6421 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4296 event pairs, 26 based on Foata normal form. 4/822 useless extension candidates. Maximal degree in co-relation 4759. Up to 307 conditions per place. [2023-08-26 19:51:26,593 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 94 selfloop transitions, 106 changer transitions 4/204 dead transitions. [2023-08-26 19:51:26,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 204 transitions, 2590 flow [2023-08-26 19:51:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 19:51:26,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 19:51:26,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1369 transitions. [2023-08-26 19:51:26,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3321203299369238 [2023-08-26 19:51:26,598 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1369 transitions. [2023-08-26 19:51:26,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1369 transitions. [2023-08-26 19:51:26,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:26,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1369 transitions. [2023-08-26 19:51:26,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 76.05555555555556) internal successors, (1369), 18 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,608 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,608 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 1225 flow. Second operand 18 states and 1369 transitions. [2023-08-26 19:51:26,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 204 transitions, 2590 flow [2023-08-26 19:51:26,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 204 transitions, 2331 flow, removed 125 selfloop flow, removed 3 redundant places. [2023-08-26 19:51:26,637 INFO L231 Difference]: Finished difference. Result has 101 places, 162 transitions, 2131 flow [2023-08-26 19:51:26,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1036, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2131, PETRI_PLACES=101, PETRI_TRANSITIONS=162} [2023-08-26 19:51:26,638 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 75 predicate places. [2023-08-26 19:51:26,638 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 162 transitions, 2131 flow [2023-08-26 19:51:26,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 73.6923076923077) internal successors, (958), 13 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:26,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:26,639 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:26,647 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 19:51:26,847 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,SelfDestructingSolverStorable12 [2023-08-26 19:51:26,848 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:26,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:26,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1909482580, now seen corresponding path program 4 times [2023-08-26 19:51:26,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:26,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355353439] [2023-08-26 19:51:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:26,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:27,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:27,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355353439] [2023-08-26 19:51:27,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355353439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:27,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471776461] [2023-08-26 19:51:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:51:27,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:27,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:27,603 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 19:51:27,605 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 19:51:27,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:51:27,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:27,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 19:51:27,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:28,321 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 19:51:28,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:29,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471776461] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:29,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:29,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2023-08-26 19:51:29,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185685970] [2023-08-26 19:51:29,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:29,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 19:51:29,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:29,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 19:51:29,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-26 19:51:29,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:51:29,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 162 transitions, 2131 flow. Second operand has 14 states, 14 states have (on average 73.35714285714286) internal successors, (1027), 14 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 19:51:29,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:29,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:51:29,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:31,251 INFO L124 PetriNetUnfolderBase]: 516/1053 cut-off events. [2023-08-26 19:51:31,251 INFO L125 PetriNetUnfolderBase]: For 7450/7450 co-relation queries the response was YES. [2023-08-26 19:51:31,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6357 conditions, 1053 events. 516/1053 cut-off events. For 7450/7450 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6059 event pairs, 12 based on Foata normal form. 5/1058 useless extension candidates. Maximal degree in co-relation 6325. Up to 317 conditions per place. [2023-08-26 19:51:31,264 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 66 selfloop transitions, 188 changer transitions 10/264 dead transitions. [2023-08-26 19:51:31,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 264 transitions, 3717 flow [2023-08-26 19:51:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 19:51:31,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 19:51:31,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1374 transitions. [2023-08-26 19:51:31,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-26 19:51:31,269 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1374 transitions. [2023-08-26 19:51:31,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1374 transitions. [2023-08-26 19:51:31,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:31,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1374 transitions. [2023-08-26 19:51:31,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 76.33333333333333) internal successors, (1374), 18 states have internal predecessors, (1374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:31,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:31,279 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 229.0) internal successors, (4351), 19 states have internal predecessors, (4351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:31,279 INFO L175 Difference]: Start difference. First operand has 101 places, 162 transitions, 2131 flow. Second operand 18 states and 1374 transitions. [2023-08-26 19:51:31,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 264 transitions, 3717 flow [2023-08-26 19:51:31,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 264 transitions, 3186 flow, removed 258 selfloop flow, removed 3 redundant places. [2023-08-26 19:51:31,334 INFO L231 Difference]: Finished difference. Result has 118 places, 207 transitions, 2849 flow [2023-08-26 19:51:31,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=1772, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2849, PETRI_PLACES=118, PETRI_TRANSITIONS=207} [2023-08-26 19:51:31,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 92 predicate places. [2023-08-26 19:51:31,335 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 207 transitions, 2849 flow [2023-08-26 19:51:31,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 73.35714285714286) internal successors, (1027), 14 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 19:51:31,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:31,335 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:31,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 19:51:31,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:31,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:31,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1759706257, now seen corresponding path program 5 times [2023-08-26 19:51:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:31,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078193076] [2023-08-26 19:51:31,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:31,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:51:31,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:31,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078193076] [2023-08-26 19:51:31,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078193076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:31,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399977726] [2023-08-26 19:51:31,826 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:51:31,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:31,827 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 19:51:31,829 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 19:51:31,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 19:51:31,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:31,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 19:51:31,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:32,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:51:32,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:51:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399977726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:32,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:32,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-08-26 19:51:32,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122085268] [2023-08-26 19:51:32,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:32,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:51:32,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:32,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:51:32,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-26 19:51:32,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 229 [2023-08-26 19:51:32,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 207 transitions, 2849 flow. Second operand has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:32,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:32,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 229 [2023-08-26 19:51:32,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:34,484 INFO L124 PetriNetUnfolderBase]: 1275/2524 cut-off events. [2023-08-26 19:51:34,484 INFO L125 PetriNetUnfolderBase]: For 14551/14551 co-relation queries the response was YES. [2023-08-26 19:51:34,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15405 conditions, 2524 events. 1275/2524 cut-off events. For 14551/14551 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16207 event pairs, 6 based on Foata normal form. 204/2728 useless extension candidates. Maximal degree in co-relation 15370. Up to 679 conditions per place. [2023-08-26 19:51:34,510 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 350 selfloop transitions, 203 changer transitions 0/553 dead transitions. [2023-08-26 19:51:34,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 553 transitions, 8582 flow [2023-08-26 19:51:34,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 19:51:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 19:51:34,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1211 transitions. [2023-08-26 19:51:34,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3777292576419214 [2023-08-26 19:51:34,515 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1211 transitions. [2023-08-26 19:51:34,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1211 transitions. [2023-08-26 19:51:34,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:34,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1211 transitions. [2023-08-26 19:51:34,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.5) internal successors, (1211), 14 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:34,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:34,523 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:34,523 INFO L175 Difference]: Start difference. First operand has 118 places, 207 transitions, 2849 flow. Second operand 14 states and 1211 transitions. [2023-08-26 19:51:34,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 553 transitions, 8582 flow [2023-08-26 19:51:34,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 553 transitions, 7600 flow, removed 394 selfloop flow, removed 9 redundant places. [2023-08-26 19:51:34,697 INFO L231 Difference]: Finished difference. Result has 122 places, 344 transitions, 4706 flow [2023-08-26 19:51:34,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=2548, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4706, PETRI_PLACES=122, PETRI_TRANSITIONS=344} [2023-08-26 19:51:34,698 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 96 predicate places. [2023-08-26 19:51:34,698 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 344 transitions, 4706 flow [2023-08-26 19:51:34,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 83.0) internal successors, (1079), 13 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:34,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:34,698 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:34,705 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 19:51:34,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:34,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:34,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:34,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1938979984, now seen corresponding path program 6 times [2023-08-26 19:51:34,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:34,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334928727] [2023-08-26 19:51:34,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:34,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:35,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:35,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:35,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334928727] [2023-08-26 19:51:35,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334928727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:35,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099166508] [2023-08-26 19:51:35,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:51:35,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:35,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:35,177 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 19:51:35,179 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 19:51:35,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 19:51:35,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:35,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 19:51:35,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:35,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:39,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099166508] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:39,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:39,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 20 [2023-08-26 19:51:39,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333453187] [2023-08-26 19:51:39,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 19:51:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 19:51:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=299, Unknown=1, NotChecked=0, Total=420 [2023-08-26 19:51:39,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:51:39,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 344 transitions, 4706 flow. Second operand has 21 states, 21 states have (on average 72.85714285714286) internal successors, (1530), 21 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:39,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:39,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:51:39,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:47,541 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:51:51,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:51:52,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:51:53,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:51:59,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:52:07,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:52:09,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:52:10,586 INFO L124 PetriNetUnfolderBase]: 1990/3717 cut-off events. [2023-08-26 19:52:10,587 INFO L125 PetriNetUnfolderBase]: For 20026/20026 co-relation queries the response was YES. [2023-08-26 19:52:10,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22480 conditions, 3717 events. 1990/3717 cut-off events. For 20026/20026 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 24615 event pairs, 104 based on Foata normal form. 126/3843 useless extension candidates. Maximal degree in co-relation 22449. Up to 909 conditions per place. [2023-08-26 19:52:10,628 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 268 selfloop transitions, 494 changer transitions 12/774 dead transitions. [2023-08-26 19:52:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 774 transitions, 11191 flow [2023-08-26 19:52:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-26 19:52:10,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-26 19:52:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2944 transitions. [2023-08-26 19:52:10,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3296383383719628 [2023-08-26 19:52:10,634 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2944 transitions. [2023-08-26 19:52:10,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2944 transitions. [2023-08-26 19:52:10,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:10,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2944 transitions. [2023-08-26 19:52:10,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 75.48717948717949) internal successors, (2944), 39 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:10,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 229.0) internal successors, (9160), 40 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:10,668 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 229.0) internal successors, (9160), 40 states have internal predecessors, (9160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:10,668 INFO L175 Difference]: Start difference. First operand has 122 places, 344 transitions, 4706 flow. Second operand 39 states and 2944 transitions. [2023-08-26 19:52:10,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 774 transitions, 11191 flow [2023-08-26 19:52:10,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 774 transitions, 10416 flow, removed 334 selfloop flow, removed 6 redundant places. [2023-08-26 19:52:10,923 INFO L231 Difference]: Finished difference. Result has 167 places, 681 transitions, 10050 flow [2023-08-26 19:52:10,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4242, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=10050, PETRI_PLACES=167, PETRI_TRANSITIONS=681} [2023-08-26 19:52:10,924 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 141 predicate places. [2023-08-26 19:52:10,924 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 681 transitions, 10050 flow [2023-08-26 19:52:10,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.85714285714286) internal successors, (1530), 21 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:10,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:10,925 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:10,931 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 19:52:11,125 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,SelfDestructingSolverStorable15 [2023-08-26 19:52:11,126 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:52:11,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:11,126 INFO L85 PathProgramCache]: Analyzing trace with hash 416663472, now seen corresponding path program 7 times [2023-08-26 19:52:11,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:11,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334972480] [2023-08-26 19:52:11,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:11,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:11,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:11,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334972480] [2023-08-26 19:52:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334972480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508361170] [2023-08-26 19:52:11,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:52:11,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:11,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:11,443 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 19:52:11,445 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 19:52:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:11,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:52:11,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:12,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:13,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508361170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:13,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:13,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 19:52:13,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168825175] [2023-08-26 19:52:13,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:13,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:52:13,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:52:13,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:52:13,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:52:13,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 681 transitions, 10050 flow. Second operand has 19 states, 19 states have (on average 72.94736842105263) internal successors, (1386), 19 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:13,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:13,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:52:13,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:15,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:52:19,366 INFO L124 PetriNetUnfolderBase]: 3012/5426 cut-off events. [2023-08-26 19:52:19,366 INFO L125 PetriNetUnfolderBase]: For 30054/30054 co-relation queries the response was YES. [2023-08-26 19:52:19,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35186 conditions, 5426 events. 3012/5426 cut-off events. For 30054/30054 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 35802 event pairs, 132 based on Foata normal form. 84/5510 useless extension candidates. Maximal degree in co-relation 35145. Up to 1357 conditions per place. [2023-08-26 19:52:19,410 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 546 selfloop transitions, 607 changer transitions 32/1185 dead transitions. [2023-08-26 19:52:19,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 1185 transitions, 18644 flow [2023-08-26 19:52:19,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 19:52:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 19:52:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2519 transitions. [2023-08-26 19:52:19,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2023-08-26 19:52:19,415 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2519 transitions. [2023-08-26 19:52:19,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2519 transitions. [2023-08-26 19:52:19,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:19,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2519 transitions. [2023-08-26 19:52:19,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 76.33333333333333) internal successors, (2519), 33 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:19,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 229.0) internal successors, (7786), 34 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:19,429 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 229.0) internal successors, (7786), 34 states have internal predecessors, (7786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:19,429 INFO L175 Difference]: Start difference. First operand has 167 places, 681 transitions, 10050 flow. Second operand 33 states and 2519 transitions. [2023-08-26 19:52:19,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 1185 transitions, 18644 flow [2023-08-26 19:52:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 1185 transitions, 18004 flow, removed 227 selfloop flow, removed 6 redundant places. [2023-08-26 19:52:20,218 INFO L231 Difference]: Finished difference. Result has 209 places, 1015 transitions, 16615 flow [2023-08-26 19:52:20,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=9479, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16615, PETRI_PLACES=209, PETRI_TRANSITIONS=1015} [2023-08-26 19:52:20,219 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 183 predicate places. [2023-08-26 19:52:20,219 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 1015 transitions, 16615 flow [2023-08-26 19:52:20,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 72.94736842105263) internal successors, (1386), 19 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:20,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:20,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:20,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 19:52:20,428 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,SelfDestructingSolverStorable16 [2023-08-26 19:52:20,428 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:52:20,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:20,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1308815986, now seen corresponding path program 8 times [2023-08-26 19:52:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:20,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669076299] [2023-08-26 19:52:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:20,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:20,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:20,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669076299] [2023-08-26 19:52:20,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669076299] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:20,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205493735] [2023-08-26 19:52:20,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:52:20,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:20,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:20,678 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:20,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 19:52:20,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:52:20,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:52:20,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:52:20,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:21,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:21,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:22,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205493735] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:22,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:22,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 19:52:22,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28142519] [2023-08-26 19:52:22,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:22,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:52:22,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:22,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:52:22,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:52:22,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:52:22,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 1015 transitions, 16615 flow. Second operand has 19 states, 19 states have (on average 72.94736842105263) internal successors, (1386), 19 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:22,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:22,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:52:22,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:27,601 INFO L124 PetriNetUnfolderBase]: 3484/6147 cut-off events. [2023-08-26 19:52:27,601 INFO L125 PetriNetUnfolderBase]: For 42594/42594 co-relation queries the response was YES. [2023-08-26 19:52:27,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44345 conditions, 6147 events. 3484/6147 cut-off events. For 42594/42594 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 40680 event pairs, 12 based on Foata normal form. 70/6217 useless extension candidates. Maximal degree in co-relation 44291. Up to 2362 conditions per place. [2023-08-26 19:52:27,657 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 626 selfloop transitions, 708 changer transitions 0/1334 dead transitions. [2023-08-26 19:52:27,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1334 transitions, 23680 flow [2023-08-26 19:52:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 19:52:27,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 19:52:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1841 transitions. [2023-08-26 19:52:27,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33497088791848617 [2023-08-26 19:52:27,661 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1841 transitions. [2023-08-26 19:52:27,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1841 transitions. [2023-08-26 19:52:27,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:52:27,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1841 transitions. [2023-08-26 19:52:27,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 76.70833333333333) internal successors, (1841), 24 states have internal predecessors, (1841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:27,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 229.0) internal successors, (5725), 25 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:27,670 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 229.0) internal successors, (5725), 25 states have internal predecessors, (5725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:27,670 INFO L175 Difference]: Start difference. First operand has 209 places, 1015 transitions, 16615 flow. Second operand 24 states and 1841 transitions. [2023-08-26 19:52:27,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1334 transitions, 23680 flow [2023-08-26 19:52:29,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 1334 transitions, 22879 flow, removed 367 selfloop flow, removed 7 redundant places. [2023-08-26 19:52:29,144 INFO L231 Difference]: Finished difference. Result has 236 places, 1241 transitions, 22251 flow [2023-08-26 19:52:29,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=15866, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=22251, PETRI_PLACES=236, PETRI_TRANSITIONS=1241} [2023-08-26 19:52:29,145 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 210 predicate places. [2023-08-26 19:52:29,145 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 1241 transitions, 22251 flow [2023-08-26 19:52:29,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 72.94736842105263) internal successors, (1386), 19 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:29,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:52:29,146 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:52:29,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 19:52:29,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 19:52:29,347 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:52:29,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:52:29,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2136417010, now seen corresponding path program 9 times [2023-08-26 19:52:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:52:29,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180820593] [2023-08-26 19:52:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:52:29,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:52:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:52:29,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:29,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:52:29,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180820593] [2023-08-26 19:52:29,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180820593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:52:29,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439510999] [2023-08-26 19:52:29,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:52:29,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:52:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:52:29,549 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:52:29,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 19:52:29,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-26 19:52:29,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:52:29,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 19:52:29,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:52:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:30,088 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:52:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:52:30,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439510999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:52:30,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:52:30,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-26 19:52:30,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809005786] [2023-08-26 19:52:30,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:52:30,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 19:52:30,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:52:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 19:52:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-26 19:52:30,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 229 [2023-08-26 19:52:30,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 1241 transitions, 22251 flow. Second operand has 17 states, 17 states have (on average 78.29411764705883) internal successors, (1331), 17 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:52:30,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:52:30,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 229 [2023-08-26 19:52:30,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:52:45,678 WARN L234 SmtUtils]: Spent 11.15s on a formula simplification. DAG size of input: 73 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:53:14,726 INFO L124 PetriNetUnfolderBase]: 5993/10481 cut-off events. [2023-08-26 19:53:14,726 INFO L125 PetriNetUnfolderBase]: For 124400/124400 co-relation queries the response was YES. [2023-08-26 19:53:14,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83568 conditions, 10481 events. 5993/10481 cut-off events. For 124400/124400 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 74188 event pairs, 132 based on Foata normal form. 954/11435 useless extension candidates. Maximal degree in co-relation 83503. Up to 2953 conditions per place. [2023-08-26 19:53:14,829 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 1267 selfloop transitions, 1244 changer transitions 18/2529 dead transitions. [2023-08-26 19:53:14,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 2529 transitions, 47239 flow [2023-08-26 19:53:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-26 19:53:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-26 19:53:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 5729 transitions. [2023-08-26 19:53:14,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523586936465957 [2023-08-26 19:53:14,845 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 5729 transitions. [2023-08-26 19:53:14,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 5729 transitions. [2023-08-26 19:53:14,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:14,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 5729 transitions. [2023-08-26 19:53:14,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 80.69014084507042) internal successors, (5729), 71 states have internal predecessors, (5729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 229.0) internal successors, (16488), 72 states have internal predecessors, (16488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,883 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 229.0) internal successors, (16488), 72 states have internal predecessors, (16488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:14,883 INFO L175 Difference]: Start difference. First operand has 236 places, 1241 transitions, 22251 flow. Second operand 71 states and 5729 transitions. [2023-08-26 19:53:14,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 2529 transitions, 47239 flow [2023-08-26 19:53:19,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 2529 transitions, 46679 flow, removed 230 selfloop flow, removed 8 redundant places. [2023-08-26 19:53:19,263 INFO L231 Difference]: Finished difference. Result has 339 places, 2064 transitions, 41531 flow [2023-08-26 19:53:19,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=21171, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=533, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=41531, PETRI_PLACES=339, PETRI_TRANSITIONS=2064} [2023-08-26 19:53:19,264 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 313 predicate places. [2023-08-26 19:53:19,264 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 2064 transitions, 41531 flow [2023-08-26 19:53:19,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.29411764705883) internal successors, (1331), 17 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:19,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:19,265 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:19,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-26 19:53:19,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:19,471 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:53:19,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:19,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1549043616, now seen corresponding path program 10 times [2023-08-26 19:53:19,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:19,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430209632] [2023-08-26 19:53:19,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:19,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:53:19,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430209632] [2023-08-26 19:53:19,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430209632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:53:19,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979967304] [2023-08-26 19:53:19,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:53:19,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:19,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:53:19,749 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:53:19,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 19:53:19,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:53:19,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:53:19,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:53:19,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:53:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:53:20,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:53:21,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:53:21,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979967304] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:53:21,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:53:21,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 19:53:21,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059356859] [2023-08-26 19:53:21,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:53:21,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:53:21,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:21,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:53:21,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:53:21,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:53:21,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 2064 transitions, 41531 flow. Second operand has 19 states, 19 states have (on average 73.42105263157895) internal successors, (1395), 19 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:21,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:21,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:53:21,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:53:35,343 INFO L124 PetriNetUnfolderBase]: 8589/15329 cut-off events. [2023-08-26 19:53:35,343 INFO L125 PetriNetUnfolderBase]: For 222734/222734 co-relation queries the response was YES. [2023-08-26 19:53:35,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137037 conditions, 15329 events. 8589/15329 cut-off events. For 222734/222734 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 117301 event pairs, 56 based on Foata normal form. 646/15975 useless extension candidates. Maximal degree in co-relation 136929. Up to 5183 conditions per place. [2023-08-26 19:53:35,619 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 1337 selfloop transitions, 1875 changer transitions 1/3213 dead transitions. [2023-08-26 19:53:35,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 3213 transitions, 69225 flow [2023-08-26 19:53:35,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-26 19:53:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-26 19:53:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3161 transitions. [2023-08-26 19:53:35,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3366705719458941 [2023-08-26 19:53:35,646 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3161 transitions. [2023-08-26 19:53:35,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3161 transitions. [2023-08-26 19:53:35,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:53:35,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3161 transitions. [2023-08-26 19:53:35,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 77.09756097560975) internal successors, (3161), 41 states have internal predecessors, (3161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:35,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 229.0) internal successors, (9618), 42 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:35,672 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 229.0) internal successors, (9618), 42 states have internal predecessors, (9618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:35,673 INFO L175 Difference]: Start difference. First operand has 339 places, 2064 transitions, 41531 flow. Second operand 41 states and 3161 transitions. [2023-08-26 19:53:35,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 3213 transitions, 69225 flow [2023-08-26 19:53:46,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 3213 transitions, 65985 flow, removed 1399 selfloop flow, removed 12 redundant places. [2023-08-26 19:53:46,936 INFO L231 Difference]: Finished difference. Result has 380 places, 3008 transitions, 64214 flow [2023-08-26 19:53:46,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=38291, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1039, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=64214, PETRI_PLACES=380, PETRI_TRANSITIONS=3008} [2023-08-26 19:53:46,938 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 354 predicate places. [2023-08-26 19:53:46,939 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 3008 transitions, 64214 flow [2023-08-26 19:53:46,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 73.42105263157895) internal successors, (1395), 19 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:46,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:53:46,939 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:53:46,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 19:53:47,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:47,147 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:53:47,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:53:47,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1264534992, now seen corresponding path program 11 times [2023-08-26 19:53:47,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:53:47,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681017292] [2023-08-26 19:53:47,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:53:47,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:53:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:53:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-26 19:53:47,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:53:47,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681017292] [2023-08-26 19:53:47,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681017292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:53:47,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404027429] [2023-08-26 19:53:47,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:53:47,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:53:47,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:53:47,965 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:53:47,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 19:53:48,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 19:53:48,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:53:48,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:53:48,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:53:48,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:53:48,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:53:49,923 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:53:49,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404027429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:53:49,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:53:49,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2023-08-26 19:53:49,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380823496] [2023-08-26 19:53:49,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:53:49,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:53:49,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:53:49,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:53:49,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:53:49,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 229 [2023-08-26 19:53:49,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 3008 transitions, 64214 flow. Second operand has 18 states, 18 states have (on average 82.33333333333333) internal successors, (1482), 18 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:53:49,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:53:49,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 229 [2023-08-26 19:53:49,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:54:01,430 INFO L124 PetriNetUnfolderBase]: 7242/12797 cut-off events. [2023-08-26 19:54:01,430 INFO L125 PetriNetUnfolderBase]: For 207424/207424 co-relation queries the response was YES. [2023-08-26 19:54:01,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117122 conditions, 12797 events. 7242/12797 cut-off events. For 207424/207424 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 94886 event pairs, 428 based on Foata normal form. 948/13745 useless extension candidates. Maximal degree in co-relation 117005. Up to 3986 conditions per place. [2023-08-26 19:54:01,613 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 1476 selfloop transitions, 940 changer transitions 439/2855 dead transitions. [2023-08-26 19:54:01,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 2855 transitions, 64063 flow [2023-08-26 19:54:01,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 19:54:01,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 19:54:01,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1204 transitions. [2023-08-26 19:54:01,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37554585152838427 [2023-08-26 19:54:01,615 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1204 transitions. [2023-08-26 19:54:01,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1204 transitions. [2023-08-26 19:54:01,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:54:01,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1204 transitions. [2023-08-26 19:54:01,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 86.0) internal successors, (1204), 14 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:01,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:01,618 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 229.0) internal successors, (3435), 15 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:01,618 INFO L175 Difference]: Start difference. First operand has 380 places, 3008 transitions, 64214 flow. Second operand 14 states and 1204 transitions. [2023-08-26 19:54:01,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 2855 transitions, 64063 flow [2023-08-26 19:54:10,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 2855 transitions, 59621 flow, removed 1438 selfloop flow, removed 11 redundant places. [2023-08-26 19:54:10,493 INFO L231 Difference]: Finished difference. Result has 379 places, 2185 transitions, 41370 flow [2023-08-26 19:54:10,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=46755, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=828, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1628, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=41370, PETRI_PLACES=379, PETRI_TRANSITIONS=2185} [2023-08-26 19:54:10,496 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 353 predicate places. [2023-08-26 19:54:10,496 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 2185 transitions, 41370 flow [2023-08-26 19:54:10,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 82.33333333333333) internal successors, (1482), 18 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:10,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:54:10,496 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:54:10,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 19:54:10,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-26 19:54:10,701 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:54:10,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:54:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1563237795, now seen corresponding path program 12 times [2023-08-26 19:54:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:54:10,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966224209] [2023-08-26 19:54:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:54:10,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:54:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:54:11,016 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-26 19:54:11,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:54:11,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966224209] [2023-08-26 19:54:11,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966224209] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:54:11,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358531168] [2023-08-26 19:54:11,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:54:11,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:54:11,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:54:11,021 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:54:11,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 19:54:11,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 19:54:11,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:54:11,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 19:54:11,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:54:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-26 19:54:11,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:54:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-26 19:54:12,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358531168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:54:12,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:54:12,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 19:54:12,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902326082] [2023-08-26 19:54:12,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:54:12,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:54:12,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:54:12,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:54:12,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:54:12,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:54:12,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 2185 transitions, 41370 flow. Second operand has 19 states, 19 states have (on average 73.3157894736842) internal successors, (1393), 19 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:12,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:54:12,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:54:12,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:54:23,037 INFO L124 PetriNetUnfolderBase]: 6644/11773 cut-off events. [2023-08-26 19:54:23,037 INFO L125 PetriNetUnfolderBase]: For 142457/142457 co-relation queries the response was YES. [2023-08-26 19:54:23,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100509 conditions, 11773 events. 6644/11773 cut-off events. For 142457/142457 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 85911 event pairs, 316 based on Foata normal form. 192/11965 useless extension candidates. Maximal degree in co-relation 100397. Up to 4873 conditions per place. [2023-08-26 19:54:23,189 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 1815 selfloop transitions, 680 changer transitions 128/2623 dead transitions. [2023-08-26 19:54:23,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 2623 transitions, 52814 flow [2023-08-26 19:54:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-26 19:54:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-26 19:54:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3996 transitions. [2023-08-26 19:54:23,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32924116338469145 [2023-08-26 19:54:23,193 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3996 transitions. [2023-08-26 19:54:23,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3996 transitions. [2023-08-26 19:54:23,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:54:23,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3996 transitions. [2023-08-26 19:54:23,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 75.39622641509433) internal successors, (3996), 53 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:23,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 229.0) internal successors, (12366), 54 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:23,208 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 229.0) internal successors, (12366), 54 states have internal predecessors, (12366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:23,208 INFO L175 Difference]: Start difference. First operand has 379 places, 2185 transitions, 41370 flow. Second operand 53 states and 3996 transitions. [2023-08-26 19:54:23,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 2623 transitions, 52814 flow [2023-08-26 19:54:29,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 2623 transitions, 49644 flow, removed 277 selfloop flow, removed 24 redundant places. [2023-08-26 19:54:29,750 INFO L231 Difference]: Finished difference. Result has 411 places, 2252 transitions, 41853 flow [2023-08-26 19:54:29,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=38235, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=41853, PETRI_PLACES=411, PETRI_TRANSITIONS=2252} [2023-08-26 19:54:29,751 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 385 predicate places. [2023-08-26 19:54:29,751 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 2252 transitions, 41853 flow [2023-08-26 19:54:29,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 73.3157894736842) internal successors, (1393), 19 states have internal predecessors, (1393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:29,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:54:29,752 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:54:29,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 19:54:29,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:54:29,952 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:54:29,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:54:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1346089167, now seen corresponding path program 13 times [2023-08-26 19:54:29,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:54:29,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927453894] [2023-08-26 19:54:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:54:29,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:54:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:54:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:54:30,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:54:30,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927453894] [2023-08-26 19:54:30,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927453894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:54:30,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623647991] [2023-08-26 19:54:30,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:54:30,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:54:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:54:30,447 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:54:30,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 19:54:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:54:30,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-26 19:54:30,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:54:31,756 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:54:31,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:54:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 34 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-26 19:54:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623647991] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:54:33,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:54:33,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-08-26 19:54:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731702557] [2023-08-26 19:54:33,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:54:33,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 19:54:33,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:54:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 19:54:33,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2023-08-26 19:54:33,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 229 [2023-08-26 19:54:33,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 2252 transitions, 41853 flow. Second operand has 29 states, 29 states have (on average 72.79310344827586) internal successors, (2111), 29 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:33,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:54:33,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 229 [2023-08-26 19:54:33,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:54:54,086 INFO L124 PetriNetUnfolderBase]: 9528/16597 cut-off events. [2023-08-26 19:54:54,086 INFO L125 PetriNetUnfolderBase]: For 228654/228654 co-relation queries the response was YES. [2023-08-26 19:54:54,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147130 conditions, 16597 events. 9528/16597 cut-off events. For 228654/228654 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 127686 event pairs, 232 based on Foata normal form. 162/16759 useless extension candidates. Maximal degree in co-relation 147016. Up to 5595 conditions per place. [2023-08-26 19:54:54,324 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 1729 selfloop transitions, 1952 changer transitions 22/3703 dead transitions. [2023-08-26 19:54:54,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 3703 transitions, 77841 flow [2023-08-26 19:54:54,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-26 19:54:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-26 19:54:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4160 transitions. [2023-08-26 19:54:54,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33028979753870585 [2023-08-26 19:54:54,329 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4160 transitions. [2023-08-26 19:54:54,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4160 transitions. [2023-08-26 19:54:54,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:54:54,330 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4160 transitions. [2023-08-26 19:54:54,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 75.63636363636364) internal successors, (4160), 55 states have internal predecessors, (4160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:54,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 229.0) internal successors, (12824), 56 states have internal predecessors, (12824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:54,345 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 229.0) internal successors, (12824), 56 states have internal predecessors, (12824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:54:54,346 INFO L175 Difference]: Start difference. First operand has 411 places, 2252 transitions, 41853 flow. Second operand 55 states and 4160 transitions. [2023-08-26 19:54:54,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 3703 transitions, 77841 flow [2023-08-26 19:55:04,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 3703 transitions, 76151 flow, removed 798 selfloop flow, removed 17 redundant places. [2023-08-26 19:55:04,458 INFO L231 Difference]: Finished difference. Result has 448 places, 3509 transitions, 74711 flow [2023-08-26 19:55:04,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=40807, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=881, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=74711, PETRI_PLACES=448, PETRI_TRANSITIONS=3509} [2023-08-26 19:55:04,460 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 422 predicate places. [2023-08-26 19:55:04,460 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 3509 transitions, 74711 flow [2023-08-26 19:55:04,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 72.79310344827586) internal successors, (2111), 29 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:04,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:55:04,461 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:55:04,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-26 19:55:04,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:55:04,661 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:55:04,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:55:04,662 INFO L85 PathProgramCache]: Analyzing trace with hash 369813823, now seen corresponding path program 14 times [2023-08-26 19:55:04,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:55:04,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800522480] [2023-08-26 19:55:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:55:04,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:55:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:55:05,614 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:55:05,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:55:05,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800522480] [2023-08-26 19:55:05,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800522480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:55:05,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635538848] [2023-08-26 19:55:05,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:55:05,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:55:05,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:55:05,615 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:55:05,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 19:55:05,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:55:05,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:55:05,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 19:55:05,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:55:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-26 19:55:06,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:55:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-26 19:55:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635538848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:55:08,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:55:08,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 28 [2023-08-26 19:55:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714073530] [2023-08-26 19:55:08,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:55:08,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-26 19:55:08,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:55:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-26 19:55:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2023-08-26 19:55:08,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 229 [2023-08-26 19:55:08,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 3509 transitions, 74711 flow. Second operand has 29 states, 29 states have (on average 77.75862068965517) internal successors, (2255), 29 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:55:08,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:55:08,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 229 [2023-08-26 19:55:08,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:55:11,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:55:13,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:55:28,311 WARN L234 SmtUtils]: Spent 5.81s on a formula simplification. DAG size of input: 78 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:55:48,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:56:12,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:56:14,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:56:16,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:56:17,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:56:27,828 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~N~0 2)) (.cse3 (* c_~i1~0 (- 1)))) (let ((.cse1 (* (div c_~i2~0 4294967296) 4294967296)) (.cse4 (* 4294967296 (div c_~i1~0 4294967296))) (.cse6 (mod c_~N~0 2147483648)) (.cse0 (* (div c_~N~0 2147483648) 4294967296)) (.cse7 (+ c_~i2~0 (* (div (+ .cse2 (- 6) .cse3) 4294967296) 4294967296)))) (and (or (<= (+ .cse0 4 .cse1) (+ (* (div (+ .cse2 (- 5) .cse3) 4294967296) 4294967296) c_~i2~0 .cse4)) (<= (+ 4294967288 c_~i2~0 .cse4) (+ c_~i1~0 .cse1))) (let ((.cse5 (* .cse6 2))) (or (<= .cse5 (mod (+ c_~i1~0 1) 4294967296)) (< c_~i1~0 (+ (* (div (+ c_~i1~0 (- 4294967294)) 4294967296) 4294967296) 4294967294 .cse5)))) (or (<= (+ .cse0 c_~i2~0 4294967289) (+ .cse2 .cse1)) (<= (+ c_~i1~0 .cse0 4) (+ .cse2 .cse4))) (<= (+ 2147483650 (* (div (+ (- 1) (* (- 1) .cse6)) 2147483648) 2147483648)) .cse6) (<= (+ .cse0 3 (* (div (+ c_~i2~0 4294967287 .cse3) 4294967296) 4294967296)) .cse7) (= (mod (+ c_~i1~0 4294967294) 4294967296) 0) (<= (+ (* (div (+ 4294967286 c_~i2~0 .cse3) 4294967296) 4294967296) .cse0 4) .cse7) (<= (+ .cse0 (* 4294967296 (div (+ c_~i2~0 .cse3 4294967289) 4294967296)) 1) .cse7) (<= (+ .cse0 2 (* (div (+ 4294967288 c_~i2~0 .cse3) 4294967296) 4294967296)) .cse7) (<= c_~i2~0 (+ c_~i1~0 5 (* 4294967296 (div (+ (- 5) c_~i2~0 .cse3) 4294967296))))))) is different from false [2023-08-26 19:56:29,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:56:41,148 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:56:53,810 WARN L234 SmtUtils]: Spent 5.06s on a formula simplification. DAG size of input: 85 DAG size of output: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:57:01,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:57:52,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:58:22,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:58:26,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:58:32,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:58:34,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:58:45,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:59:15,888 WARN L234 SmtUtils]: Spent 12.60s on a formula simplification. DAG size of input: 82 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:59:27,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:00:25,529 WARN L234 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 89 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:00:32,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:00:43,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:00:45,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:01:00,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-26 20:01:43,275 WARN L234 SmtUtils]: Spent 10.54s on a formula simplification. DAG size of input: 76 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:01:45,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:01:59,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:02:01,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:02:03,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:02:10,009 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:02:15,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:02:56,589 WARN L234 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 85 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 20:03:27,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:03:31,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:03:33,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:03:35,684 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:03:37,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:03:39,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:04:04,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 20:05:07,759 WARN L234 SmtUtils]: Spent 30.50s on a formula simplification. DAG size of input: 90 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-26 20:05:21,257 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:05:21,257 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 20:05:22,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 20:05:22,458 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2023-08-26 20:05:22,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 [2023-08-26 20:05:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-08-26 20:05:22,465 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 20:05:22,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 20:05:22,466 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 20:05:22,467 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 20:05:22,467 INFO L445 BasicCegarLoop]: Path program histogram: [14, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 20:05:22,470 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:05:22,470 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:05:22,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:05:22 BasicIcfg [2023-08-26 20:05:22,475 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:05:22,476 INFO L158 Benchmark]: Toolchain (without parser) took 852140.82ms. Allocated memory was 339.7MB in the beginning and 4.4GB in the end (delta: 4.0GB). Free memory was 316.6MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. [2023-08-26 20:05:22,476 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 339.7MB. Free memory is still 316.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:05:22,476 INFO L158 Benchmark]: CACSL2BoogieTranslator took 205.73ms. Allocated memory is still 339.7MB. Free memory was 316.2MB in the beginning and 305.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 20:05:22,476 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.46ms. Allocated memory is still 339.7MB. Free memory was 305.3MB in the beginning and 303.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:05:22,476 INFO L158 Benchmark]: Boogie Preprocessor took 22.40ms. Allocated memory is still 339.7MB. Free memory was 303.7MB in the beginning and 302.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:05:22,477 INFO L158 Benchmark]: RCFGBuilder took 441.08ms. Allocated memory is still 339.7MB. Free memory was 302.0MB in the beginning and 286.5MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 20:05:22,477 INFO L158 Benchmark]: TraceAbstraction took 851440.24ms. Allocated memory was 339.7MB in the beginning and 4.4GB in the end (delta: 4.0GB). Free memory was 286.0MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. [2023-08-26 20:05:22,478 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 339.7MB. Free memory is still 316.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 205.73ms. Allocated memory is still 339.7MB. Free memory was 316.2MB in the beginning and 305.3MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.46ms. Allocated memory is still 339.7MB. Free memory was 305.3MB in the beginning and 303.7MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.40ms. Allocated memory is still 339.7MB. Free memory was 303.7MB in the beginning and 302.4MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 441.08ms. Allocated memory is still 339.7MB. Free memory was 302.0MB in the beginning and 286.5MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 851440.24ms. Allocated memory was 339.7MB in the beginning and 4.4GB in the end (delta: 4.0GB). Free memory was 286.0MB in the beginning and 2.1GB in the end (delta: -1.8GB). Peak memory consumption was 2.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 100 PlacesBefore, 26 PlacesAfterwards, 101 TransitionsBefore, 21 TransitionsAfterwards, 936 CoEnabledTransitionPairs, 7 FixpointIterations, 62 TrivialSequentialCompositions, 29 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 16 ConcurrentYvCompositions, 6 ChoiceCompositions, 117 TotalNumberOfCompositions, 1300 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1194, independent: 1182, independent conditional: 0, independent unconditional: 1182, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 552, independent: 543, independent conditional: 0, independent unconditional: 543, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1194, independent: 639, independent conditional: 0, independent unconditional: 639, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 552, unknown conditional: 0, unknown unconditional: 552] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 21, Positive conditional cache size: 0, Positive unconditional cache size: 21, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 129 locations, 11 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 851.3s, OverallIterations: 24, TraceHistogramMax: 9, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 811.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 26 mSolverCounterUnknown, 2277 SdHoareTripleChecker+Valid, 134.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2277 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 133.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 73 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 645 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9033 IncrementalHoareTripleChecker+Invalid, 9777 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 645 mSolverCounterUnsat, 0 mSDtfsCounter, 9033 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 993 GetRequests, 346 SyntacticMatches, 22 SemanticMatches, 624 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12153 ImplicationChecksByTransitivity, 596.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74711occurred in iteration=23, InterpolantAutomatonStates: 450, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 30.1s InterpolantComputationTime, 582 NumberOfCodeBlocks, 577 NumberOfCodeBlocksAsserted, 61 NumberOfCheckSat, 780 ConstructedInterpolants, 0 QuantifiedInterpolants, 16515 SizeOfPredicates, 229 NumberOfNonLiveVariables, 1919 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 55 InterpolantComputations, 9 PerfectInterpolantSequences, 375/748 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown