/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/mult-comm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:37:35,683 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:37:35,770 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 19:37:35,775 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:37:35,776 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:37:35,805 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:37:35,806 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:37:35,806 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:37:35,807 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:37:35,810 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:37:35,810 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:37:35,811 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:37:35,811 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:37:35,812 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:37:35,812 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:37:35,812 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:37:35,813 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:37:35,813 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:37:35,813 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:37:35,813 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:37:35,813 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:37:35,814 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:37:35,814 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:37:35,815 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:37:35,815 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:37:35,815 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:37:35,815 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:37:35,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:37:35,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:37:35,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:37:35,817 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:37:35,817 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:37:35,817 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:37:35,817 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:37:35,818 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:37:35,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:37:36,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:37:36,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:37:36,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:37:36,128 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:37:36,128 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:37:36,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-26 19:37:37,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:37:37,460 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:37:37,461 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-comm.wvr.c [2023-08-26 19:37:37,469 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3925a4df7/f26cff87e9f34e47998b85a36c191aa5/FLAG63782c424 [2023-08-26 19:37:37,488 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3925a4df7/f26cff87e9f34e47998b85a36c191aa5 [2023-08-26 19:37:37,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:37:37,495 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:37:37,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:37:37,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:37:37,501 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:37:37,501 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,502 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@273fb5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37, skipping insertion in model container [2023-08-26 19:37:37,502 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,522 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:37:37,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:37:37,704 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:37:37,731 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:37:37,745 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:37:37,746 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37 WrapperNode [2023-08-26 19:37:37,746 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:37:37,747 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:37:37,747 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:37:37,747 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:37:37,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,766 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,786 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 56 [2023-08-26 19:37:37,787 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:37:37,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:37:37,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:37:37,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:37:37,795 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,799 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,800 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,815 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,822 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,823 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,825 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:37:37,826 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:37:37,826 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:37:37,826 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:37:37,827 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (1/1) ... [2023-08-26 19:37:37,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:37:37,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:37,858 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 19:37:37,881 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 19:37:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:37:37,924 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 19:37:37,924 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 19:37:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 19:37:37,925 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 19:37:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:37:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:37:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:37:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:37:37,925 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:37:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:37:37,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:37:37,927 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 19:37:38,033 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:37:38,035 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:37:38,238 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:37:38,243 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:37:38,243 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 19:37:38,245 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:37:38 BoogieIcfgContainer [2023-08-26 19:37:38,245 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:37:38,247 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:37:38,247 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:37:38,249 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:37:38,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:37:37" (1/3) ... [2023-08-26 19:37:38,250 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b4c3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:37:38, skipping insertion in model container [2023-08-26 19:37:38,250 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:37:37" (2/3) ... [2023-08-26 19:37:38,251 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b4c3f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:37:38, skipping insertion in model container [2023-08-26 19:37:38,251 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:37:38" (3/3) ... [2023-08-26 19:37:38,252 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.c [2023-08-26 19:37:38,265 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:37:38,265 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 19:37:38,265 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:37:38,321 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 19:37:38,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 88 transitions, 192 flow [2023-08-26 19:37:38,383 INFO L124 PetriNetUnfolderBase]: 5/86 cut-off events. [2023-08-26 19:37:38,384 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:37:38,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95 conditions, 86 events. 5/86 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 86 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-26 19:37:38,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 88 transitions, 192 flow [2023-08-26 19:37:38,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 77 transitions, 166 flow [2023-08-26 19:37:38,394 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:37:38,401 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 79 places, 77 transitions, 166 flow [2023-08-26 19:37:38,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 79 places, 77 transitions, 166 flow [2023-08-26 19:37:38,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 79 places, 77 transitions, 166 flow [2023-08-26 19:37:38,421 INFO L124 PetriNetUnfolderBase]: 5/77 cut-off events. [2023-08-26 19:37:38,422 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:37:38,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 5/77 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 85 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-08-26 19:37:38,423 INFO L119 LiptonReduction]: Number of co-enabled transitions 748 [2023-08-26 19:37:40,495 INFO L134 LiptonReduction]: Checked pairs total: 715 [2023-08-26 19:37:40,495 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-26 19:37:40,517 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:37:40,525 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;@721563f7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:37:40,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 19:37:40,533 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:37:40,533 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 19:37:40,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:37:40,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:40,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 19:37:40,535 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:37:40,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:40,539 INFO L85 PathProgramCache]: Analyzing trace with hash 331, now seen corresponding path program 1 times [2023-08-26 19:37:40,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:40,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698461760] [2023-08-26 19:37:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:40,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:40,617 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 19:37:40,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:40,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698461760] [2023-08-26 19:37:40,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698461760] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:37:40,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:37:40,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 19:37:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950793971] [2023-08-26 19:37:40,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:37:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 19:37:40,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 19:37:40,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 19:37:40,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 165 [2023-08-26 19:37:40,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 58 flow. Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:40,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 165 [2023-08-26 19:37:40,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:40,740 INFO L124 PetriNetUnfolderBase]: 100/163 cut-off events. [2023-08-26 19:37:40,740 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 19:37:40,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 338 conditions, 163 events. 100/163 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 526 event pairs, 42 based on Foata normal form. 0/83 useless extension candidates. Maximal degree in co-relation 264. Up to 160 conditions per place. [2023-08-26 19:37:40,745 INFO L140 encePairwiseOnDemand]: 163/165 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 19:37:40,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2023-08-26 19:37:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 19:37:40,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 19:37:40,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 181 transitions. [2023-08-26 19:37:40,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484848484848485 [2023-08-26 19:37:40,759 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 181 transitions. [2023-08-26 19:37:40,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 181 transitions. [2023-08-26 19:37:40,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:40,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 181 transitions. [2023-08-26 19:37:40,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,774 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,776 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 58 flow. Second operand 2 states and 181 transitions. [2023-08-26 19:37:40,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2023-08-26 19:37:40,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 19:37:40,779 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2023-08-26 19:37:40,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2023-08-26 19:37:40,783 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 19:37:40,784 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2023-08-26 19:37:40,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:40,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:37:40,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:37:40,785 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 19:37:40,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:40,785 INFO L85 PathProgramCache]: Analyzing trace with hash 324234, now seen corresponding path program 1 times [2023-08-26 19:37:40,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:40,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417410729] [2023-08-26 19:37:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:40,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:40,915 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 19:37:40,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:40,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417410729] [2023-08-26 19:37:40,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417410729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:37:40,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:37:40,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:37:40,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807121284] [2023-08-26 19:37:40,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:37:40,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:37:40,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:40,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:37:40,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:37:40,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 19:37:40,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:40,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 19:37:40,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:40,982 INFO L124 PetriNetUnfolderBase]: 93/150 cut-off events. [2023-08-26 19:37:40,983 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:37:40,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 150 events. 93/150 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 461 event pairs, 39 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 300. Up to 146 conditions per place. [2023-08-26 19:37:40,986 INFO L140 encePairwiseOnDemand]: 162/165 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-08-26 19:37:40,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2023-08-26 19:37:40,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:37:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:37:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 202 transitions. [2023-08-26 19:37:40,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4080808080808081 [2023-08-26 19:37:40,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 202 transitions. [2023-08-26 19:37:40,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 202 transitions. [2023-08-26 19:37:40,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:40,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 202 transitions. [2023-08-26 19:37:40,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:40,998 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 202 transitions. [2023-08-26 19:37:40,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2023-08-26 19:37:40,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:37:40,999 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-08-26 19:37:41,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-08-26 19:37:41,000 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -5 predicate places. [2023-08-26 19:37:41,000 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-08-26 19:37:41,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:41,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:37:41,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 19:37:41,005 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 19:37:41,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:41,005 INFO L85 PathProgramCache]: Analyzing trace with hash 324235, now seen corresponding path program 1 times [2023-08-26 19:37:41,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:41,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739164006] [2023-08-26 19:37:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:41,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:41,171 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 19:37:41,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:41,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739164006] [2023-08-26 19:37:41,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739164006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:37:41,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:37:41,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:37:41,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575963217] [2023-08-26 19:37:41,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:37:41,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:37:41,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:41,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:37:41,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:37:41,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 165 [2023-08-26 19:37:41,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:41,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 165 [2023-08-26 19:37:41,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:41,223 INFO L124 PetriNetUnfolderBase]: 86/137 cut-off events. [2023-08-26 19:37:41,223 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:37:41,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 137 events. 86/137 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 415 event pairs, 36 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 275. Up to 133 conditions per place. [2023-08-26 19:37:41,225 INFO L140 encePairwiseOnDemand]: 162/165 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 19:37:41,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2023-08-26 19:37:41,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:37:41,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:37:41,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-08-26 19:37:41,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161616161616162 [2023-08-26 19:37:41,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-08-26 19:37:41,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-08-26 19:37:41,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:41,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-08-26 19:37:41,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,229 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 206 transitions. [2023-08-26 19:37:41,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2023-08-26 19:37:41,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:37:41,230 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2023-08-26 19:37:41,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-26 19:37:41,231 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 19:37:41,231 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2023-08-26 19:37:41,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:41,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:37:41,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:37:41,235 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:37:41,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:41,235 INFO L85 PathProgramCache]: Analyzing trace with hash 311595067, now seen corresponding path program 1 times [2023-08-26 19:37:41,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:41,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791501316] [2023-08-26 19:37:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:41,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:41,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:41,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791501316] [2023-08-26 19:37:41,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791501316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:37:41,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:37:41,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:37:41,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251951706] [2023-08-26 19:37:41,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:37:41,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:37:41,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:41,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:37:41,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:37:41,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:37:41,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:41,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:37:41,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:41,407 INFO L124 PetriNetUnfolderBase]: 65/107 cut-off events. [2023-08-26 19:37:41,407 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:37:41,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220 conditions, 107 events. 65/107 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 290 event pairs, 27 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 216. Up to 103 conditions per place. [2023-08-26 19:37:41,411 INFO L140 encePairwiseOnDemand]: 163/165 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 19:37:41,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2023-08-26 19:37:41,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:37:41,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:37:41,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 192 transitions. [2023-08-26 19:37:41,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2023-08-26 19:37:41,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 192 transitions. [2023-08-26 19:37:41,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 192 transitions. [2023-08-26 19:37:41,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:41,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 192 transitions. [2023-08-26 19:37:41,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,417 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 192 transitions. [2023-08-26 19:37:41,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2023-08-26 19:37:41,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:37:41,418 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2023-08-26 19:37:41,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2023-08-26 19:37:41,419 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 19:37:41,419 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2023-08-26 19:37:41,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:41,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 19:37:41,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 19:37:41,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:37:41,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash 311595066, now seen corresponding path program 1 times [2023-08-26 19:37:41,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:41,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239301613] [2023-08-26 19:37:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:41,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:41,490 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 19:37:41,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:41,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239301613] [2023-08-26 19:37:41,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239301613] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:37:41,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:37:41,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:37:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886630736] [2023-08-26 19:37:41,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:37:41,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 19:37:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 19:37:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 19:37:41,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 165 [2023-08-26 19:37:41,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:41,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 165 [2023-08-26 19:37:41,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:41,526 INFO L124 PetriNetUnfolderBase]: 44/77 cut-off events. [2023-08-26 19:37:41,526 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:37:41,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 77 events. 44/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 18 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 157. Up to 73 conditions per place. [2023-08-26 19:37:41,527 INFO L140 encePairwiseOnDemand]: 163/165 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 19:37:41,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2023-08-26 19:37:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:37:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:37:41,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 188 transitions. [2023-08-26 19:37:41,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797979797979798 [2023-08-26 19:37:41,529 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 188 transitions. [2023-08-26 19:37:41,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 188 transitions. [2023-08-26 19:37:41,530 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:41,530 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 188 transitions. [2023-08-26 19:37:41,530 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,532 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,532 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 188 transitions. [2023-08-26 19:37:41,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2023-08-26 19:37:41,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:37:41,533 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2023-08-26 19:37:41,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, 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=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2023-08-26 19:37:41,534 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -6 predicate places. [2023-08-26 19:37:41,534 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2023-08-26 19:37:41,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:41,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:41,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:37:41,535 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 19:37:41,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -683633089, now seen corresponding path program 1 times [2023-08-26 19:37:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:41,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636187505] [2023-08-26 19:37:41,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:41,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:41,741 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 19:37:41,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636187505] [2023-08-26 19:37:41,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636187505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:37:41,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:37:41,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 19:37:41,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222822011] [2023-08-26 19:37:41,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:37:41,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:37:41,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:41,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:37:41,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:37:41,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 165 [2023-08-26 19:37:41,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:41,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 165 [2023-08-26 19:37:41,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:41,788 INFO L124 PetriNetUnfolderBase]: 65/114 cut-off events. [2023-08-26 19:37:41,789 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 19:37:41,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238 conditions, 114 events. 65/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 310 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-08-26 19:37:41,789 INFO L140 encePairwiseOnDemand]: 161/165 looper letters, 19 selfloop transitions, 3 changer transitions 1/25 dead transitions. [2023-08-26 19:37:41,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 25 transitions, 108 flow [2023-08-26 19:37:41,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:37:41,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:37:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2023-08-26 19:37:41,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503030303030303 [2023-08-26 19:37:41,791 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 249 transitions. [2023-08-26 19:37:41,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 249 transitions. [2023-08-26 19:37:41,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:41,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 249 transitions. [2023-08-26 19:37:41,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 19:37:41,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,794 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,794 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 3 states and 249 transitions. [2023-08-26 19:37:41,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 25 transitions, 108 flow [2023-08-26 19:37:41,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:37:41,795 INFO L231 Difference]: Finished difference. Result has 24 places, 17 transitions, 57 flow [2023-08-26 19:37:41,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=24, PETRI_TRANSITIONS=17} [2023-08-26 19:37:41,798 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, -4 predicate places. [2023-08-26 19:37:41,798 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 17 transitions, 57 flow [2023-08-26 19:37:41,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.66666666666667) internal successors, (236), 3 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:41,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:41,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:41,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 19:37:41,799 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 19:37:41,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash 355104081, now seen corresponding path program 1 times [2023-08-26 19:37:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:41,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822720246] [2023-08-26 19:37:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:42,082 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 19:37:42,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:42,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822720246] [2023-08-26 19:37:42,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822720246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:42,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206879614] [2023-08-26 19:37:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:42,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:42,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:42,093 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 19:37:42,115 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 19:37:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:42,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-26 19:37:42,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:42,338 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 19:37:42,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:42,607 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 19:37:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206879614] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:42,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 9 [2023-08-26 19:37:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658440252] [2023-08-26 19:37:42,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:42,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 19:37:42,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 19:37:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-08-26 19:37:42,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 19:37:42,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 17 transitions, 57 flow. Second operand has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:42,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:42,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 19:37:42,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:42,751 INFO L124 PetriNetUnfolderBase]: 87/160 cut-off events. [2023-08-26 19:37:42,751 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-26 19:37:42,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 160 events. 87/160 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 506 event pairs, 2 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 392. Up to 75 conditions per place. [2023-08-26 19:37:42,752 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 24 selfloop transitions, 5 changer transitions 21/50 dead transitions. [2023-08-26 19:37:42,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 50 transitions, 242 flow [2023-08-26 19:37:42,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:37:42,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:37:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 478 transitions. [2023-08-26 19:37:42,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41385281385281386 [2023-08-26 19:37:42,755 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 478 transitions. [2023-08-26 19:37:42,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 478 transitions. [2023-08-26 19:37:42,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:42,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 478 transitions. [2023-08-26 19:37:42,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.28571428571429) internal successors, (478), 7 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:42,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:42,758 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 165.0) internal successors, (1320), 8 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:42,759 INFO L175 Difference]: Start difference. First operand has 24 places, 17 transitions, 57 flow. Second operand 7 states and 478 transitions. [2023-08-26 19:37:42,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 50 transitions, 242 flow [2023-08-26 19:37:42,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:37:42,760 INFO L231 Difference]: Finished difference. Result has 34 places, 19 transitions, 86 flow [2023-08-26 19:37:42,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=19} [2023-08-26 19:37:42,761 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-08-26 19:37:42,761 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 19 transitions, 86 flow [2023-08-26 19:37:42,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 63.72727272727273) internal successors, (701), 11 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:42,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:42,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:42,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 19:37:42,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:42,968 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 19:37:42,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1259958227, now seen corresponding path program 1 times [2023-08-26 19:37:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:42,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800635037] [2023-08-26 19:37:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:42,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:43,199 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 19:37:43,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800635037] [2023-08-26 19:37:43,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800635037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:43,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393886006] [2023-08-26 19:37:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:43,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:43,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:43,201 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 19:37:43,204 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 19:37:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:43,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 19:37:43,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:43,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:43,542 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 19:37:43,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393886006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:43,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:43,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 7 [2023-08-26 19:37:43,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728033924] [2023-08-26 19:37:43,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:43,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:37:43,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:43,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:37:43,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:37:43,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 19:37:43,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 19 transitions, 86 flow. Second operand has 9 states, 9 states have (on average 69.88888888888889) internal successors, (629), 9 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:43,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:43,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 19:37:43,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:43,668 INFO L124 PetriNetUnfolderBase]: 48/93 cut-off events. [2023-08-26 19:37:43,668 INFO L125 PetriNetUnfolderBase]: For 50/57 co-relation queries the response was YES. [2023-08-26 19:37:43,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 93 events. 48/93 cut-off events. For 50/57 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 8 based on Foata normal form. 8/101 useless extension candidates. Maximal degree in co-relation 281. Up to 69 conditions per place. [2023-08-26 19:37:43,669 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 17 selfloop transitions, 6 changer transitions 9/34 dead transitions. [2023-08-26 19:37:43,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 201 flow [2023-08-26 19:37:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:37:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:37:43,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 434 transitions. [2023-08-26 19:37:43,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4383838383838384 [2023-08-26 19:37:43,671 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 434 transitions. [2023-08-26 19:37:43,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 434 transitions. [2023-08-26 19:37:43,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:43,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 434 transitions. [2023-08-26 19:37:43,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:43,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:43,675 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 165.0) internal successors, (1155), 7 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:43,675 INFO L175 Difference]: Start difference. First operand has 34 places, 19 transitions, 86 flow. Second operand 6 states and 434 transitions. [2023-08-26 19:37:43,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 201 flow [2023-08-26 19:37:43,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 171 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 19:37:43,677 INFO L231 Difference]: Finished difference. Result has 34 places, 21 transitions, 98 flow [2023-08-26 19:37:43,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=34, PETRI_TRANSITIONS=21} [2023-08-26 19:37:43,678 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 6 predicate places. [2023-08-26 19:37:43,678 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 21 transitions, 98 flow [2023-08-26 19:37:43,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 69.88888888888889) internal successors, (629), 9 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:43,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:43,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:43,687 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 19:37:43,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-26 19:37:43,888 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 19:37:43,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:43,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1776123691, now seen corresponding path program 2 times [2023-08-26 19:37:43,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:43,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828865227] [2023-08-26 19:37:43,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:43,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:43,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:44,211 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 19:37:44,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828865227] [2023-08-26 19:37:44,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828865227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:44,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742039248] [2023-08-26 19:37:44,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:37:44,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:44,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:44,213 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 19:37:44,216 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 19:37:44,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:37:44,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:37:44,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 19:37:44,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:44,380 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 19:37:44,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:44,596 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 19:37:44,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742039248] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:44,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:44,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 13 [2023-08-26 19:37:44,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787409781] [2023-08-26 19:37:44,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:44,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 19:37:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:44,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 19:37:44,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-08-26 19:37:44,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:37:44,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 21 transitions, 98 flow. Second operand has 15 states, 15 states have (on average 61.4) internal successors, (921), 15 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:44,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:44,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:37:44,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:44,835 INFO L124 PetriNetUnfolderBase]: 113/211 cut-off events. [2023-08-26 19:37:44,835 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-26 19:37:44,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 211 events. 113/211 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 682 event pairs, 5 based on Foata normal form. 3/214 useless extension candidates. Maximal degree in co-relation 611. Up to 92 conditions per place. [2023-08-26 19:37:44,837 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 44 selfloop transitions, 24 changer transitions 14/82 dead transitions. [2023-08-26 19:37:44,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 82 transitions, 452 flow [2023-08-26 19:37:44,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 19:37:44,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 19:37:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 910 transitions. [2023-08-26 19:37:44,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2023-08-26 19:37:44,840 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 910 transitions. [2023-08-26 19:37:44,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 910 transitions. [2023-08-26 19:37:44,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:44,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 910 transitions. [2023-08-26 19:37:44,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.0) internal successors, (910), 14 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:44,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:44,846 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 165.0) internal successors, (2475), 15 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:44,847 INFO L175 Difference]: Start difference. First operand has 34 places, 21 transitions, 98 flow. Second operand 14 states and 910 transitions. [2023-08-26 19:37:44,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 82 transitions, 452 flow [2023-08-26 19:37:44,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 82 transitions, 439 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-26 19:37:44,850 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 250 flow [2023-08-26 19:37:44,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=250, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-26 19:37:44,850 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 23 predicate places. [2023-08-26 19:37:44,850 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 250 flow [2023-08-26 19:37:44,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.4) internal successors, (921), 15 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:44,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:44,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:44,859 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 19:37:45,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:45,057 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 19:37:45,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:45,057 INFO L85 PathProgramCache]: Analyzing trace with hash -168198231, now seen corresponding path program 3 times [2023-08-26 19:37:45,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:45,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639975330] [2023-08-26 19:37:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:45,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:45,281 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 19:37:45,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:45,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639975330] [2023-08-26 19:37:45,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639975330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:45,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803860954] [2023-08-26 19:37:45,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:37:45,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:45,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:45,283 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 19:37:45,285 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 19:37:45,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 19:37:45,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:37:45,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 19:37:45,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:45,410 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 19:37:45,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:45,577 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 19:37:45,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803860954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:45,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:45,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-26 19:37:45,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790819583] [2023-08-26 19:37:45,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:45,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:37:45,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:45,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:37:45,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:37:45,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 19:37:45,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 250 flow. Second operand has 10 states, 10 states have (on average 69.8) internal successors, (698), 10 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:45,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:45,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 19:37:45,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:45,688 INFO L124 PetriNetUnfolderBase]: 116/216 cut-off events. [2023-08-26 19:37:45,689 INFO L125 PetriNetUnfolderBase]: For 516/521 co-relation queries the response was YES. [2023-08-26 19:37:45,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 889 conditions, 216 events. 116/216 cut-off events. For 516/521 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 701 event pairs, 14 based on Foata normal form. 7/223 useless extension candidates. Maximal degree in co-relation 872. Up to 164 conditions per place. [2023-08-26 19:37:45,691 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 42 selfloop transitions, 15 changer transitions 8/67 dead transitions. [2023-08-26 19:37:45,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 67 transitions, 509 flow [2023-08-26 19:37:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 19:37:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 19:37:45,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 586 transitions. [2023-08-26 19:37:45,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44393939393939397 [2023-08-26 19:37:45,693 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 586 transitions. [2023-08-26 19:37:45,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 586 transitions. [2023-08-26 19:37:45,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:45,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 586 transitions. [2023-08-26 19:37:45,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.25) internal successors, (586), 8 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:45,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:45,697 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:45,697 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 250 flow. Second operand 8 states and 586 transitions. [2023-08-26 19:37:45,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 67 transitions, 509 flow [2023-08-26 19:37:45,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 67 transitions, 421 flow, removed 36 selfloop flow, removed 6 redundant places. [2023-08-26 19:37:45,705 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 268 flow [2023-08-26 19:37:45,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=268, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2023-08-26 19:37:45,706 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 26 predicate places. [2023-08-26 19:37:45,706 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 268 flow [2023-08-26 19:37:45,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.8) internal successors, (698), 10 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:45,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:45,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:45,714 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 19:37:45,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:45,913 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 19:37:45,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1163260319, now seen corresponding path program 2 times [2023-08-26 19:37:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:45,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824610873] [2023-08-26 19:37:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:45,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:46,113 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 19:37:46,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:46,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824610873] [2023-08-26 19:37:46,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824610873] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:46,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170818356] [2023-08-26 19:37:46,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:37:46,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:46,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:46,115 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 19:37:46,117 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 19:37:46,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:37:46,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:37:46,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 19:37:46,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:46,249 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 19:37:46,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:46,448 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 19:37:46,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170818356] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:46,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:46,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 8 [2023-08-26 19:37:46,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281234929] [2023-08-26 19:37:46,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:46,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-26 19:37:46,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-26 19:37:46,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-08-26 19:37:46,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 19:37:46,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 268 flow. Second operand has 10 states, 10 states have (on average 69.8) internal successors, (698), 10 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:46,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:46,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 19:37:46,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:46,568 INFO L124 PetriNetUnfolderBase]: 142/264 cut-off events. [2023-08-26 19:37:46,568 INFO L125 PetriNetUnfolderBase]: For 786/797 co-relation queries the response was YES. [2023-08-26 19:37:46,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 264 events. 142/264 cut-off events. For 786/797 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 955 event pairs, 18 based on Foata normal form. 11/271 useless extension candidates. Maximal degree in co-relation 1047. Up to 204 conditions per place. [2023-08-26 19:37:46,571 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 51 selfloop transitions, 14 changer transitions 4/73 dead transitions. [2023-08-26 19:37:46,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 548 flow [2023-08-26 19:37:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 19:37:46,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 19:37:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 584 transitions. [2023-08-26 19:37:46,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2023-08-26 19:37:46,573 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 584 transitions. [2023-08-26 19:37:46,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 584 transitions. [2023-08-26 19:37:46,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:46,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 584 transitions. [2023-08-26 19:37:46,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 73.0) internal successors, (584), 8 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:46,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:46,577 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 165.0) internal successors, (1485), 9 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:46,577 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 268 flow. Second operand 8 states and 584 transitions. [2023-08-26 19:37:46,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 548 flow [2023-08-26 19:37:46,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 501 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-26 19:37:46,582 INFO L231 Difference]: Finished difference. Result has 60 places, 53 transitions, 327 flow [2023-08-26 19:37:46,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=327, PETRI_PLACES=60, PETRI_TRANSITIONS=53} [2023-08-26 19:37:46,582 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 32 predicate places. [2023-08-26 19:37:46,582 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 53 transitions, 327 flow [2023-08-26 19:37:46,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 69.8) internal successors, (698), 10 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:46,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:46,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:46,591 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 19:37:46,789 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,SelfDestructingSolverStorable10 [2023-08-26 19:37:46,789 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 19:37:46,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash 296253715, now seen corresponding path program 3 times [2023-08-26 19:37:46,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:46,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131604170] [2023-08-26 19:37:46,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:46,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:47,027 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 19:37:47,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:47,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131604170] [2023-08-26 19:37:47,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131604170] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:47,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711806958] [2023-08-26 19:37:47,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:37:47,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:47,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:47,030 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 19:37:47,032 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 19:37:47,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 19:37:47,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:37:47,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 19:37:47,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:47,160 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 19:37:47,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:47,301 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 19:37:47,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711806958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:47,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:47,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 9 [2023-08-26 19:37:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797654181] [2023-08-26 19:37:47,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:47,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 19:37:47,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 19:37:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2023-08-26 19:37:47,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 19:37:47,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 53 transitions, 327 flow. Second operand has 11 states, 11 states have (on average 69.72727272727273) internal successors, (767), 11 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:47,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:47,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 19:37:47,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:47,488 INFO L124 PetriNetUnfolderBase]: 186/348 cut-off events. [2023-08-26 19:37:47,488 INFO L125 PetriNetUnfolderBase]: For 1047/1055 co-relation queries the response was YES. [2023-08-26 19:37:47,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1421 conditions, 348 events. 186/348 cut-off events. For 1047/1055 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1391 event pairs, 27 based on Foata normal form. 9/353 useless extension candidates. Maximal degree in co-relation 1402. Up to 238 conditions per place. [2023-08-26 19:37:47,491 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 60 selfloop transitions, 20 changer transitions 7/91 dead transitions. [2023-08-26 19:37:47,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 91 transitions, 704 flow [2023-08-26 19:37:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 19:37:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 19:37:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 730 transitions. [2023-08-26 19:37:47,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44242424242424244 [2023-08-26 19:37:47,494 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 730 transitions. [2023-08-26 19:37:47,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 730 transitions. [2023-08-26 19:37:47,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:47,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 730 transitions. [2023-08-26 19:37:47,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 73.0) internal successors, (730), 10 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:47,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:47,499 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 165.0) internal successors, (1815), 11 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:47,499 INFO L175 Difference]: Start difference. First operand has 60 places, 53 transitions, 327 flow. Second operand 10 states and 730 transitions. [2023-08-26 19:37:47,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 91 transitions, 704 flow [2023-08-26 19:37:47,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 91 transitions, 651 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-26 19:37:47,507 INFO L231 Difference]: Finished difference. Result has 69 places, 64 transitions, 424 flow [2023-08-26 19:37:47,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=424, PETRI_PLACES=69, PETRI_TRANSITIONS=64} [2023-08-26 19:37:47,509 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 41 predicate places. [2023-08-26 19:37:47,509 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 64 transitions, 424 flow [2023-08-26 19:37:47,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 69.72727272727273) internal successors, (767), 11 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:47,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:47,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:47,516 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 19:37:47,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:47,715 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 19:37:47,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:47,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1880880287, now seen corresponding path program 1 times [2023-08-26 19:37:47,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:47,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002625686] [2023-08-26 19:37:47,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:47,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:48,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:48,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002625686] [2023-08-26 19:37:48,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002625686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:48,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177529093] [2023-08-26 19:37:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:48,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:48,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:48,137 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 19:37:48,140 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 19:37:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:48,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:37:48,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:48,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177529093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:50,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:50,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:37:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149264783] [2023-08-26 19:37:50,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:37:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:37:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:37:50,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:37:50,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 64 transitions, 424 flow. Second operand has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:50,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:50,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:37:50,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:52,174 INFO L124 PetriNetUnfolderBase]: 283/544 cut-off events. [2023-08-26 19:37:52,174 INFO L125 PetriNetUnfolderBase]: For 1551/1551 co-relation queries the response was YES. [2023-08-26 19:37:52,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 544 events. 283/544 cut-off events. For 1551/1551 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2556 event pairs, 33 based on Foata normal form. 3/547 useless extension candidates. Maximal degree in co-relation 2167. Up to 270 conditions per place. [2023-08-26 19:37:52,179 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 93 selfloop transitions, 49 changer transitions 28/170 dead transitions. [2023-08-26 19:37:52,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 170 transitions, 1240 flow [2023-08-26 19:37:52,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 19:37:52,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 19:37:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1492 transitions. [2023-08-26 19:37:52,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39314888010540183 [2023-08-26 19:37:52,184 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1492 transitions. [2023-08-26 19:37:52,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1492 transitions. [2023-08-26 19:37:52,185 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:52,185 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1492 transitions. [2023-08-26 19:37:52,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 64.8695652173913) internal successors, (1492), 23 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:52,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:52,193 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:52,193 INFO L175 Difference]: Start difference. First operand has 69 places, 64 transitions, 424 flow. Second operand 23 states and 1492 transitions. [2023-08-26 19:37:52,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 170 transitions, 1240 flow [2023-08-26 19:37:52,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 170 transitions, 1169 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-08-26 19:37:52,202 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 668 flow [2023-08-26 19:37:52,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=668, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2023-08-26 19:37:52,202 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 72 predicate places. [2023-08-26 19:37:52,202 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 668 flow [2023-08-26 19:37:52,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:52,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:52,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:52,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 19:37:52,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:52,418 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 19:37:52,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2144859197, now seen corresponding path program 2 times [2023-08-26 19:37:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992665670] [2023-08-26 19:37:52,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:52,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:52,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:52,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992665670] [2023-08-26 19:37:52,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992665670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:52,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504398627] [2023-08-26 19:37:52,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:37:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:52,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:52,919 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 19:37:52,922 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 19:37:52,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:37:52,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:37:52,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:37:53,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:53,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:54,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:54,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504398627] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:54,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:54,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 19:37:54,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596782753] [2023-08-26 19:37:54,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:54,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:37:54,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:54,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:37:54,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:37:54,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:37:54,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 668 flow. Second operand has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:54,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:54,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:37:54,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:57,017 INFO L124 PetriNetUnfolderBase]: 324/630 cut-off events. [2023-08-26 19:37:57,017 INFO L125 PetriNetUnfolderBase]: For 4298/4298 co-relation queries the response was YES. [2023-08-26 19:37:57,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3239 conditions, 630 events. 324/630 cut-off events. For 4298/4298 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3154 event pairs, 27 based on Foata normal form. 3/633 useless extension candidates. Maximal degree in co-relation 3206. Up to 281 conditions per place. [2023-08-26 19:37:57,023 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 92 selfloop transitions, 73 changer transitions 21/186 dead transitions. [2023-08-26 19:37:57,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 186 transitions, 1765 flow [2023-08-26 19:37:57,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 19:37:57,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 19:37:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1618 transitions. [2023-08-26 19:37:57,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3922424242424242 [2023-08-26 19:37:57,029 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1618 transitions. [2023-08-26 19:37:57,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1618 transitions. [2023-08-26 19:37:57,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:57,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1618 transitions. [2023-08-26 19:37:57,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.72) internal successors, (1618), 25 states have internal predecessors, (1618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:57,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:57,040 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:57,040 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 668 flow. Second operand 25 states and 1618 transitions. [2023-08-26 19:37:57,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 186 transitions, 1765 flow [2023-08-26 19:37:57,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 186 transitions, 1611 flow, removed 59 selfloop flow, removed 12 redundant places. [2023-08-26 19:37:57,064 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 1130 flow [2023-08-26 19:37:57,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1130, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2023-08-26 19:37:57,065 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 92 predicate places. [2023-08-26 19:37:57,065 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 1130 flow [2023-08-26 19:37:57,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:57,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:57,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:57,077 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 19:37:57,271 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,SelfDestructingSolverStorable13 [2023-08-26 19:37:57,272 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 19:37:57,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:57,272 INFO L85 PathProgramCache]: Analyzing trace with hash -749395943, now seen corresponding path program 4 times [2023-08-26 19:37:57,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:57,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196267627] [2023-08-26 19:37:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:57,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:57,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:57,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196267627] [2023-08-26 19:37:57,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196267627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:57,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499257145] [2023-08-26 19:37:57,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:37:57,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:57,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:57,487 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 19:37:57,489 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 19:37:57,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:37:57,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:37:57,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 19:37:57,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:57,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:37:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:57,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499257145] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:37:57,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:37:57,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 14 [2023-08-26 19:37:57,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980033754] [2023-08-26 19:37:57,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:37:57,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 19:37:57,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:37:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 19:37:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-08-26 19:37:57,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 19:37:57,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 1130 flow. Second operand has 16 states, 16 states have (on average 63.5625) internal successors, (1017), 16 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:57,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:37:57,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 19:37:57,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:37:58,205 INFO L124 PetriNetUnfolderBase]: 325/624 cut-off events. [2023-08-26 19:37:58,205 INFO L125 PetriNetUnfolderBase]: For 5599/5599 co-relation queries the response was YES. [2023-08-26 19:37:58,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3495 conditions, 624 events. 325/624 cut-off events. For 5599/5599 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3030 event pairs, 60 based on Foata normal form. 3/625 useless extension candidates. Maximal degree in co-relation 3454. Up to 526 conditions per place. [2023-08-26 19:37:58,212 INFO L140 encePairwiseOnDemand]: 158/165 looper letters, 109 selfloop transitions, 18 changer transitions 21/148 dead transitions. [2023-08-26 19:37:58,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 148 transitions, 1611 flow [2023-08-26 19:37:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 19:37:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 19:37:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 865 transitions. [2023-08-26 19:37:58,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40326340326340326 [2023-08-26 19:37:58,215 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 865 transitions. [2023-08-26 19:37:58,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 865 transitions. [2023-08-26 19:37:58,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:37:58,216 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 865 transitions. [2023-08-26 19:37:58,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 66.53846153846153) internal successors, (865), 13 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:58,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:58,221 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 165.0) internal successors, (2310), 14 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:58,221 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 1130 flow. Second operand 13 states and 865 transitions. [2023-08-26 19:37:58,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 148 transitions, 1611 flow [2023-08-26 19:37:58,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 148 transitions, 1290 flow, removed 142 selfloop flow, removed 13 redundant places. [2023-08-26 19:37:58,249 INFO L231 Difference]: Finished difference. Result has 119 places, 111 transitions, 897 flow [2023-08-26 19:37:58,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=897, PETRI_PLACES=119, PETRI_TRANSITIONS=111} [2023-08-26 19:37:58,250 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 91 predicate places. [2023-08-26 19:37:58,250 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 111 transitions, 897 flow [2023-08-26 19:37:58,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.5625) internal successors, (1017), 16 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:37:58,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:37:58,251 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:37:58,256 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 19:37:58,456 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,SelfDestructingSolverStorable14 [2023-08-26 19:37:58,456 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 19:37:58,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:37:58,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1943691345, now seen corresponding path program 3 times [2023-08-26 19:37:58,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:37:58,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799879160] [2023-08-26 19:37:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:37:58,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:37:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:37:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:59,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:37:59,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799879160] [2023-08-26 19:37:59,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799879160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:37:59,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875165286] [2023-08-26 19:37:59,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:37:59,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:37:59,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:37:59,392 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 19:37:59,415 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 19:37:59,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 19:37:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:37:59,561 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:37:59,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:37:59,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:37:59,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:03,300 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse3 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse2 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse4 (div (+ (mod c_~x_1~0 4294967296) (- 4294967294)) 4294967296))) (and (forall ((v_z_55 Int)) (or (< .cse0 v_z_55) (let ((.cse1 (* v_z_55 2))) (< (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse1) 4294967296) 4294967296)) (+ c_~x_2~0 .cse1 4294967295 .cse2))) (<= v_z_55 .cse3))) (or (forall ((v_z_55 Int)) (or (< .cse0 v_z_55) (<= v_z_55 .cse3) (let ((.cse5 (* v_z_55 2))) (< (+ (* .cse4 4294967296) c_~x_2~0 .cse5 .cse2 4294967293) (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse5) 4294967296) 4294967296)))))) (< .cse4 0)) (forall ((v_z_55 Int)) (or (let ((.cse6 (* v_z_55 2))) (< (+ c_~x_2~0 .cse6 .cse2) (+ c_~x_1~0 3 (* (div (+ c_~x_2~0 .cse6) 4294967296) 4294967296)))) (< .cse0 v_z_55) (<= v_z_55 .cse3))) (or (forall ((v_z_55 Int)) (or (< .cse0 v_z_55) (<= v_z_55 .cse3) (let ((.cse7 (* v_z_55 2))) (< (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296) 1) (+ c_~x_2~0 .cse7 .cse2))))) (< 0 (+ .cse4 1))))) is different from false [2023-08-26 19:38:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 19:38:03,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875165286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:03,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:03,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-26 19:38:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910785149] [2023-08-26 19:38:03,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:03,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 19:38:03,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:03,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 19:38:03,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=331, Unknown=1, NotChecked=38, Total=462 [2023-08-26 19:38:03,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:38:03,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 111 transitions, 897 flow. Second operand has 22 states, 22 states have (on average 60.81818181818182) internal successors, (1338), 22 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:03,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:03,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:38:03,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:07,444 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 19:38:12,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:38:14,826 INFO L124 PetriNetUnfolderBase]: 410/782 cut-off events. [2023-08-26 19:38:14,827 INFO L125 PetriNetUnfolderBase]: For 5515/5515 co-relation queries the response was YES. [2023-08-26 19:38:14,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4057 conditions, 782 events. 410/782 cut-off events. For 5515/5515 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3967 event pairs, 26 based on Foata normal form. 4/778 useless extension candidates. Maximal degree in co-relation 4017. Up to 293 conditions per place. [2023-08-26 19:38:14,834 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 116 selfloop transitions, 104 changer transitions 20/240 dead transitions. [2023-08-26 19:38:14,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 240 transitions, 2256 flow [2023-08-26 19:38:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 19:38:14,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 19:38:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2133 transitions. [2023-08-26 19:38:14,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39173553719008264 [2023-08-26 19:38:14,839 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2133 transitions. [2023-08-26 19:38:14,839 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2133 transitions. [2023-08-26 19:38:14,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:14,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2133 transitions. [2023-08-26 19:38:14,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.63636363636364) internal successors, (2133), 33 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:14,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 165.0) internal successors, (5610), 34 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:14,852 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 165.0) internal successors, (5610), 34 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:14,852 INFO L175 Difference]: Start difference. First operand has 119 places, 111 transitions, 897 flow. Second operand 33 states and 2133 transitions. [2023-08-26 19:38:14,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 240 transitions, 2256 flow [2023-08-26 19:38:14,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 240 transitions, 2183 flow, removed 16 selfloop flow, removed 10 redundant places. [2023-08-26 19:38:14,874 INFO L231 Difference]: Finished difference. Result has 144 places, 142 transitions, 1580 flow [2023-08-26 19:38:14,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1580, PETRI_PLACES=144, PETRI_TRANSITIONS=142} [2023-08-26 19:38:14,875 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 116 predicate places. [2023-08-26 19:38:14,875 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 142 transitions, 1580 flow [2023-08-26 19:38:14,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.81818181818182) internal successors, (1338), 22 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:14,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:14,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:14,887 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 19:38:15,082 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,SelfDestructingSolverStorable15 [2023-08-26 19:38:15,082 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 19:38:15,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:15,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1752844233, now seen corresponding path program 4 times [2023-08-26 19:38:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:15,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642410972] [2023-08-26 19:38:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:15,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:15,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642410972] [2023-08-26 19:38:15,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642410972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:38:15,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055300729] [2023-08-26 19:38:15,508 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:38:15,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:15,509 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 19:38:15,513 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 19:38:15,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:38:15,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:38:15,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:38:15,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:38:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:15,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:18,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:18,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055300729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:18,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:18,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:38:18,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167522693] [2023-08-26 19:38:18,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:18,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:38:18,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:18,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:38:18,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:38:18,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:38:18,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 142 transitions, 1580 flow. Second operand has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:18,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:18,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:38:18,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:19,905 INFO L124 PetriNetUnfolderBase]: 446/853 cut-off events. [2023-08-26 19:38:19,905 INFO L125 PetriNetUnfolderBase]: For 7895/7895 co-relation queries the response was YES. [2023-08-26 19:38:19,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5078 conditions, 853 events. 446/853 cut-off events. For 7895/7895 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4435 event pairs, 71 based on Foata normal form. 2/847 useless extension candidates. Maximal degree in co-relation 5033. Up to 730 conditions per place. [2023-08-26 19:38:19,915 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 161 selfloop transitions, 34 changer transitions 16/211 dead transitions. [2023-08-26 19:38:19,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 211 transitions, 2514 flow [2023-08-26 19:38:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 19:38:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 19:38:19,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1036 transitions. [2023-08-26 19:38:19,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924242424242424 [2023-08-26 19:38:19,918 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1036 transitions. [2023-08-26 19:38:19,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1036 transitions. [2023-08-26 19:38:19,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:19,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1036 transitions. [2023-08-26 19:38:19,920 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 64.75) internal successors, (1036), 16 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:19,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:19,924 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:19,924 INFO L175 Difference]: Start difference. First operand has 144 places, 142 transitions, 1580 flow. Second operand 16 states and 1036 transitions. [2023-08-26 19:38:19,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 211 transitions, 2514 flow [2023-08-26 19:38:19,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 211 transitions, 1905 flow, removed 216 selfloop flow, removed 26 redundant places. [2023-08-26 19:38:19,971 INFO L231 Difference]: Finished difference. Result has 140 places, 165 transitions, 1430 flow [2023-08-26 19:38:19,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1430, PETRI_PLACES=140, PETRI_TRANSITIONS=165} [2023-08-26 19:38:19,972 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 112 predicate places. [2023-08-26 19:38:19,972 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 165 transitions, 1430 flow [2023-08-26 19:38:19,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:19,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:19,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:19,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 19:38:20,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 19:38:20,179 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 19:38:20,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1596765795, now seen corresponding path program 5 times [2023-08-26 19:38:20,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:20,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597722963] [2023-08-26 19:38:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:20,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:20,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597722963] [2023-08-26 19:38:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597722963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:38:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594683987] [2023-08-26 19:38:20,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:38:20,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:20,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:20,725 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 19:38:20,733 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 19:38:20,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 19:38:20,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:38:20,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:38:20,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:38:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:20,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:25,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594683987] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:25,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:25,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:38:25,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355318435] [2023-08-26 19:38:25,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:25,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:38:25,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:25,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:38:25,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:38:25,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:38:25,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 165 transitions, 1430 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:25,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:25,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:38:25,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:27,056 INFO L124 PetriNetUnfolderBase]: 466/899 cut-off events. [2023-08-26 19:38:27,056 INFO L125 PetriNetUnfolderBase]: For 6543/6543 co-relation queries the response was YES. [2023-08-26 19:38:27,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 899 events. 466/899 cut-off events. For 6543/6543 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 4795 event pairs, 73 based on Foata normal form. 2/889 useless extension candidates. Maximal degree in co-relation 4761. Up to 739 conditions per place. [2023-08-26 19:38:27,062 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 153 selfloop transitions, 47 changer transitions 16/216 dead transitions. [2023-08-26 19:38:27,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 216 transitions, 2237 flow [2023-08-26 19:38:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 19:38:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 19:38:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1149 transitions. [2023-08-26 19:38:27,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38686868686868686 [2023-08-26 19:38:27,064 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1149 transitions. [2023-08-26 19:38:27,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1149 transitions. [2023-08-26 19:38:27,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:27,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1149 transitions. [2023-08-26 19:38:27,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 63.833333333333336) internal successors, (1149), 18 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,070 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,070 INFO L175 Difference]: Start difference. First operand has 140 places, 165 transitions, 1430 flow. Second operand 18 states and 1149 transitions. [2023-08-26 19:38:27,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 216 transitions, 2237 flow [2023-08-26 19:38:27,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 216 transitions, 2095 flow, removed 69 selfloop flow, removed 2 redundant places. [2023-08-26 19:38:27,102 INFO L231 Difference]: Finished difference. Result has 160 places, 175 transitions, 1640 flow [2023-08-26 19:38:27,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1316, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1640, PETRI_PLACES=160, PETRI_TRANSITIONS=175} [2023-08-26 19:38:27,103 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 132 predicate places. [2023-08-26 19:38:27,103 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 175 transitions, 1640 flow [2023-08-26 19:38:27,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:27,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:27,103 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:27,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-26 19:38:27,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 19:38:27,308 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 19:38:27,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1538318201, now seen corresponding path program 4 times [2023-08-26 19:38:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:27,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139943272] [2023-08-26 19:38:27,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:27,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:27,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:27,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:27,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139943272] [2023-08-26 19:38:27,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139943272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:38:27,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922539816] [2023-08-26 19:38:27,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:38:27,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:27,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:27,533 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 19:38:27,556 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 19:38:27,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:38:27,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:38:27,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 19:38:27,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:38:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:27,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:29,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922539816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:29,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:29,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 11 [2023-08-26 19:38:29,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638754993] [2023-08-26 19:38:29,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:29,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:38:29,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:38:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=110, Unknown=1, NotChecked=0, Total=156 [2023-08-26 19:38:29,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 165 [2023-08-26 19:38:29,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 175 transitions, 1640 flow. Second operand has 13 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:29,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:29,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 165 [2023-08-26 19:38:29,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:30,354 INFO L124 PetriNetUnfolderBase]: 456/876 cut-off events. [2023-08-26 19:38:30,354 INFO L125 PetriNetUnfolderBase]: For 6921/6921 co-relation queries the response was YES. [2023-08-26 19:38:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4802 conditions, 876 events. 456/876 cut-off events. For 6921/6921 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4662 event pairs, 68 based on Foata normal form. 4/868 useless extension candidates. Maximal degree in co-relation 4752. Up to 753 conditions per place. [2023-08-26 19:38:30,361 INFO L140 encePairwiseOnDemand]: 159/165 looper letters, 155 selfloop transitions, 26 changer transitions 30/215 dead transitions. [2023-08-26 19:38:30,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 215 transitions, 2296 flow [2023-08-26 19:38:30,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 19:38:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 19:38:30,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 806 transitions. [2023-08-26 19:38:30,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440771349862259 [2023-08-26 19:38:30,364 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 806 transitions. [2023-08-26 19:38:30,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 806 transitions. [2023-08-26 19:38:30,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:30,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 806 transitions. [2023-08-26 19:38:30,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 73.27272727272727) internal successors, (806), 11 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:30,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 165.0) internal successors, (1980), 12 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:30,367 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 165.0) internal successors, (1980), 12 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:30,367 INFO L175 Difference]: Start difference. First operand has 160 places, 175 transitions, 1640 flow. Second operand 11 states and 806 transitions. [2023-08-26 19:38:30,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 215 transitions, 2296 flow [2023-08-26 19:38:30,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 215 transitions, 2137 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-08-26 19:38:30,407 INFO L231 Difference]: Finished difference. Result has 160 places, 171 transitions, 1510 flow [2023-08-26 19:38:30,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1481, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1510, PETRI_PLACES=160, PETRI_TRANSITIONS=171} [2023-08-26 19:38:30,408 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 132 predicate places. [2023-08-26 19:38:30,408 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 171 transitions, 1510 flow [2023-08-26 19:38:30,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 69.6923076923077) internal successors, (906), 13 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:30,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:30,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:30,417 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 19:38:30,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:30,614 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 19:38:30,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:30,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1344004749, now seen corresponding path program 6 times [2023-08-26 19:38:30,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:30,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382050599] [2023-08-26 19:38:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:30,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:31,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382050599] [2023-08-26 19:38:31,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382050599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:38:31,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204944718] [2023-08-26 19:38:31,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:38:31,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:31,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:31,064 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 19:38:31,065 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 19:38:31,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 19:38:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:38:31,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:38:31,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:38:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:31,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:35,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204944718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:35,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:35,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:38:35,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690383761] [2023-08-26 19:38:35,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:35,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:38:35,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:35,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:38:35,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:38:35,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:38:35,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 171 transitions, 1510 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:35,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:35,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:38:35,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:37,067 INFO L124 PetriNetUnfolderBase]: 504/945 cut-off events. [2023-08-26 19:38:37,067 INFO L125 PetriNetUnfolderBase]: For 7669/7669 co-relation queries the response was YES. [2023-08-26 19:38:37,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5326 conditions, 945 events. 504/945 cut-off events. For 7669/7669 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4968 event pairs, 72 based on Foata normal form. 2/933 useless extension candidates. Maximal degree in co-relation 5274. Up to 819 conditions per place. [2023-08-26 19:38:37,076 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 175 selfloop transitions, 46 changer transitions 10/231 dead transitions. [2023-08-26 19:38:37,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 231 transitions, 2543 flow [2023-08-26 19:38:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 19:38:37,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 19:38:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1208 transitions. [2023-08-26 19:38:37,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853269537480064 [2023-08-26 19:38:37,078 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1208 transitions. [2023-08-26 19:38:37,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1208 transitions. [2023-08-26 19:38:37,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:37,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1208 transitions. [2023-08-26 19:38:37,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 63.578947368421055) internal successors, (1208), 19 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:37,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:37,082 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:37,082 INFO L175 Difference]: Start difference. First operand has 160 places, 171 transitions, 1510 flow. Second operand 19 states and 1208 transitions. [2023-08-26 19:38:37,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 231 transitions, 2543 flow [2023-08-26 19:38:37,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 231 transitions, 2449 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-26 19:38:37,118 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 1935 flow [2023-08-26 19:38:37,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1422, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1935, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2023-08-26 19:38:37,119 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 140 predicate places. [2023-08-26 19:38:37,119 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 1935 flow [2023-08-26 19:38:37,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:37,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:37,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:37,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-26 19:38:37,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:37,325 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 19:38:37,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1617408075, now seen corresponding path program 7 times [2023-08-26 19:38:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:37,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063606858] [2023-08-26 19:38:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:37,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:37,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:37,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:37,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063606858] [2023-08-26 19:38:37,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063606858] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:38:37,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857938640] [2023-08-26 19:38:37,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:38:37,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:37,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:37,794 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 19:38:37,818 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 19:38:37,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:37,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:38:37,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:38:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:38,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:41,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857938640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:41,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:41,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:38:41,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941457049] [2023-08-26 19:38:41,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:41,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:38:41,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:41,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:38:41,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:38:41,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:38:41,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 1935 flow. Second operand has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:41,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:41,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:38:41,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:43,042 INFO L124 PetriNetUnfolderBase]: 503/948 cut-off events. [2023-08-26 19:38:43,042 INFO L125 PetriNetUnfolderBase]: For 8939/8939 co-relation queries the response was YES. [2023-08-26 19:38:43,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5482 conditions, 948 events. 503/948 cut-off events. For 8939/8939 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5013 event pairs, 71 based on Foata normal form. 2/936 useless extension candidates. Maximal degree in co-relation 5429. Up to 785 conditions per place. [2023-08-26 19:38:43,051 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 170 selfloop transitions, 55 changer transitions 10/235 dead transitions. [2023-08-26 19:38:43,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 235 transitions, 2592 flow [2023-08-26 19:38:43,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:38:43,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:38:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1094 transitions. [2023-08-26 19:38:43,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39001782531194296 [2023-08-26 19:38:43,054 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1094 transitions. [2023-08-26 19:38:43,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1094 transitions. [2023-08-26 19:38:43,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:43,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1094 transitions. [2023-08-26 19:38:43,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.3529411764706) internal successors, (1094), 17 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:43,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:43,059 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:43,059 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 1935 flow. Second operand 17 states and 1094 transitions. [2023-08-26 19:38:43,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 235 transitions, 2592 flow [2023-08-26 19:38:43,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 235 transitions, 2380 flow, removed 87 selfloop flow, removed 11 redundant places. [2023-08-26 19:38:43,096 INFO L231 Difference]: Finished difference. Result has 174 places, 196 transitions, 1916 flow [2023-08-26 19:38:43,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1916, PETRI_PLACES=174, PETRI_TRANSITIONS=196} [2023-08-26 19:38:43,096 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 146 predicate places. [2023-08-26 19:38:43,096 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 196 transitions, 1916 flow [2023-08-26 19:38:43,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:43,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:43,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:43,101 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 19:38:43,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:43,298 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 19:38:43,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash 987588193, now seen corresponding path program 8 times [2023-08-26 19:38:43,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878873958] [2023-08-26 19:38:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:43,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:43,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878873958] [2023-08-26 19:38:43,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878873958] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:38:43,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588947093] [2023-08-26 19:38:43,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:38:43,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:43,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:43,797 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 19:38:43,798 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 19:38:43,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:38:43,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:38:43,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:38:43,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:38:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:44,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:48,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588947093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:48,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:48,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:38:48,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982321907] [2023-08-26 19:38:48,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:48,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:38:48,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:38:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:38:48,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:38:48,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 196 transitions, 1916 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:48,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:48,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:38:48,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:50,218 INFO L124 PetriNetUnfolderBase]: 497/946 cut-off events. [2023-08-26 19:38:50,218 INFO L125 PetriNetUnfolderBase]: For 8317/8317 co-relation queries the response was YES. [2023-08-26 19:38:50,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5399 conditions, 946 events. 497/946 cut-off events. For 8317/8317 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5035 event pairs, 74 based on Foata normal form. 2/932 useless extension candidates. Maximal degree in co-relation 5344. Up to 820 conditions per place. [2023-08-26 19:38:50,228 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 182 selfloop transitions, 49 changer transitions 8/239 dead transitions. [2023-08-26 19:38:50,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 239 transitions, 2648 flow [2023-08-26 19:38:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 19:38:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 19:38:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1334 transitions. [2023-08-26 19:38:50,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384992784992785 [2023-08-26 19:38:50,231 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1334 transitions. [2023-08-26 19:38:50,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1334 transitions. [2023-08-26 19:38:50,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:50,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1334 transitions. [2023-08-26 19:38:50,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 63.523809523809526) internal successors, (1334), 21 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:50,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:50,237 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 165.0) internal successors, (3630), 22 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:50,237 INFO L175 Difference]: Start difference. First operand has 174 places, 196 transitions, 1916 flow. Second operand 21 states and 1334 transitions. [2023-08-26 19:38:50,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 239 transitions, 2648 flow [2023-08-26 19:38:50,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 239 transitions, 2491 flow, removed 48 selfloop flow, removed 14 redundant places. [2023-08-26 19:38:50,271 INFO L231 Difference]: Finished difference. Result has 182 places, 201 transitions, 1989 flow [2023-08-26 19:38:50,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1989, PETRI_PLACES=182, PETRI_TRANSITIONS=201} [2023-08-26 19:38:50,271 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 154 predicate places. [2023-08-26 19:38:50,271 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 201 transitions, 1989 flow [2023-08-26 19:38:50,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:50,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:50,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:50,277 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 19:38:50,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 19:38:50,473 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 19:38:50,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash -728971575, now seen corresponding path program 9 times [2023-08-26 19:38:50,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:50,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750296452] [2023-08-26 19:38:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750296452] [2023-08-26 19:38:50,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750296452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:38:50,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516065293] [2023-08-26 19:38:50,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:38:50,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:50,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:50,917 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:38:50,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 19:38:51,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 19:38:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:38:51,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:38:51,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:38:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:51,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:54,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516065293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:54,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:54,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:38:54,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081639022] [2023-08-26 19:38:54,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:54,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:38:54,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:54,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:38:54,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:38:54,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:38:54,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 201 transitions, 1989 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:54,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:54,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:38:54,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:38:55,556 INFO L124 PetriNetUnfolderBase]: 499/959 cut-off events. [2023-08-26 19:38:55,556 INFO L125 PetriNetUnfolderBase]: For 8350/8350 co-relation queries the response was YES. [2023-08-26 19:38:55,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5486 conditions, 959 events. 499/959 cut-off events. For 8350/8350 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5171 event pairs, 78 based on Foata normal form. 3/946 useless extension candidates. Maximal degree in co-relation 5430. Up to 878 conditions per place. [2023-08-26 19:38:55,569 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 190 selfloop transitions, 35 changer transitions 8/233 dead transitions. [2023-08-26 19:38:55,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 233 transitions, 2639 flow [2023-08-26 19:38:55,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:38:55,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:38:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1076 transitions. [2023-08-26 19:38:55,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3836007130124777 [2023-08-26 19:38:55,572 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1076 transitions. [2023-08-26 19:38:55,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1076 transitions. [2023-08-26 19:38:55,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:38:55,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1076 transitions. [2023-08-26 19:38:55,574 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.294117647058826) internal successors, (1076), 17 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:55,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:55,576 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:55,576 INFO L175 Difference]: Start difference. First operand has 182 places, 201 transitions, 1989 flow. Second operand 17 states and 1076 transitions. [2023-08-26 19:38:55,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 233 transitions, 2639 flow [2023-08-26 19:38:55,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 233 transitions, 2451 flow, removed 62 selfloop flow, removed 16 redundant places. [2023-08-26 19:38:55,624 INFO L231 Difference]: Finished difference. Result has 186 places, 205 transitions, 1975 flow [2023-08-26 19:38:55,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1801, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1975, PETRI_PLACES=186, PETRI_TRANSITIONS=205} [2023-08-26 19:38:55,625 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 158 predicate places. [2023-08-26 19:38:55,625 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 205 transitions, 1975 flow [2023-08-26 19:38:55,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:55,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:38:55,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:38:55,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 19:38:55,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:55,831 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 19:38:55,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:38:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1961337369, now seen corresponding path program 10 times [2023-08-26 19:38:55,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:38:55,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708445742] [2023-08-26 19:38:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:38:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:38:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:38:56,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:56,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:38:56,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708445742] [2023-08-26 19:38:56,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708445742] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:38:56,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898981492] [2023-08-26 19:38:56,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:38:56,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:38:56,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:38:56,256 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:38:56,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 19:38:56,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:38:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:38:56,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:38:56,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:38:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:56,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:38:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:38:59,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898981492] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:38:59,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:38:59,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:38:59,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183418817] [2023-08-26 19:38:59,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:38:59,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:38:59,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:38:59,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:38:59,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:38:59,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:38:59,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 205 transitions, 1975 flow. Second operand has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:38:59,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:38:59,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:38:59,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:00,969 INFO L124 PetriNetUnfolderBase]: 525/996 cut-off events. [2023-08-26 19:39:00,969 INFO L125 PetriNetUnfolderBase]: For 8602/8602 co-relation queries the response was YES. [2023-08-26 19:39:00,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5826 conditions, 996 events. 525/996 cut-off events. For 8602/8602 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5356 event pairs, 70 based on Foata normal form. 2/980 useless extension candidates. Maximal degree in co-relation 5768. Up to 887 conditions per place. [2023-08-26 19:39:00,979 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 209 selfloop transitions, 38 changer transitions 11/258 dead transitions. [2023-08-26 19:39:00,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 258 transitions, 2910 flow [2023-08-26 19:39:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:39:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:39:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1092 transitions. [2023-08-26 19:39:00,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893048128342246 [2023-08-26 19:39:00,981 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1092 transitions. [2023-08-26 19:39:00,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1092 transitions. [2023-08-26 19:39:00,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:00,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1092 transitions. [2023-08-26 19:39:00,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.23529411764706) internal successors, (1092), 17 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:00,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:00,986 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:00,986 INFO L175 Difference]: Start difference. First operand has 186 places, 205 transitions, 1975 flow. Second operand 17 states and 1092 transitions. [2023-08-26 19:39:00,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 258 transitions, 2910 flow [2023-08-26 19:39:01,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 258 transitions, 2811 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-08-26 19:39:01,028 INFO L231 Difference]: Finished difference. Result has 195 places, 218 transitions, 2240 flow [2023-08-26 19:39:01,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2240, PETRI_PLACES=195, PETRI_TRANSITIONS=218} [2023-08-26 19:39:01,029 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 167 predicate places. [2023-08-26 19:39:01,029 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 218 transitions, 2240 flow [2023-08-26 19:39:01,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:01,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:01,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:01,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:01,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:01,234 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:01,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1056284441, now seen corresponding path program 11 times [2023-08-26 19:39:01,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:01,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996354619] [2023-08-26 19:39:01,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:01,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:01,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:01,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996354619] [2023-08-26 19:39:01,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996354619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:01,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686742041] [2023-08-26 19:39:01,685 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:39:01,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:01,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:01,689 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:01,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 19:39:01,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 19:39:01,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:39:01,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:39:01,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:01,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:04,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686742041] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:04,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:04,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:39:04,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552271579] [2023-08-26 19:39:04,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:04,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:39:04,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:39:04,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:39:04,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:04,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 218 transitions, 2240 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:04,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:04,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:04,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:05,943 INFO L124 PetriNetUnfolderBase]: 549/1046 cut-off events. [2023-08-26 19:39:05,943 INFO L125 PetriNetUnfolderBase]: For 12294/12294 co-relation queries the response was YES. [2023-08-26 19:39:05,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6514 conditions, 1046 events. 549/1046 cut-off events. For 12294/12294 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 5731 event pairs, 76 based on Foata normal form. 2/1030 useless extension candidates. Maximal degree in co-relation 6451. Up to 886 conditions per place. [2023-08-26 19:39:05,950 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 202 selfloop transitions, 53 changer transitions 11/266 dead transitions. [2023-08-26 19:39:05,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 266 transitions, 3248 flow [2023-08-26 19:39:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 19:39:05,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 19:39:05,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1270 transitions. [2023-08-26 19:39:05,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2023-08-26 19:39:05,952 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1270 transitions. [2023-08-26 19:39:05,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1270 transitions. [2023-08-26 19:39:05,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:05,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1270 transitions. [2023-08-26 19:39:05,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 63.5) internal successors, (1270), 20 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:05,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:05,957 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 165.0) internal successors, (3465), 21 states have internal predecessors, (3465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:05,957 INFO L175 Difference]: Start difference. First operand has 195 places, 218 transitions, 2240 flow. Second operand 20 states and 1270 transitions. [2023-08-26 19:39:05,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 266 transitions, 3248 flow [2023-08-26 19:39:06,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 266 transitions, 2998 flow, removed 103 selfloop flow, removed 11 redundant places. [2023-08-26 19:39:06,009 INFO L231 Difference]: Finished difference. Result has 207 places, 228 transitions, 2422 flow [2023-08-26 19:39:06,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2422, PETRI_PLACES=207, PETRI_TRANSITIONS=228} [2023-08-26 19:39:06,010 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 179 predicate places. [2023-08-26 19:39:06,010 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 228 transitions, 2422 flow [2023-08-26 19:39:06,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:06,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:06,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:06,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:06,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:06,211 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:06,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:06,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1665522661, now seen corresponding path program 12 times [2023-08-26 19:39:06,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:06,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744652163] [2023-08-26 19:39:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:06,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:06,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:06,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744652163] [2023-08-26 19:39:06,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744652163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:06,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212358249] [2023-08-26 19:39:06,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:39:06,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:06,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:06,536 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:06,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 19:39:06,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 19:39:06,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:39:06,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:39:06,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:06,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:07,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212358249] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:07,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:07,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 19:39:07,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723839875] [2023-08-26 19:39:07,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:07,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:39:07,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:07,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:39:07,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:39:07,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:07,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 228 transitions, 2422 flow. Second operand has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:07,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:07,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:07,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:08,961 INFO L124 PetriNetUnfolderBase]: 611/1167 cut-off events. [2023-08-26 19:39:08,961 INFO L125 PetriNetUnfolderBase]: For 16430/16430 co-relation queries the response was YES. [2023-08-26 19:39:08,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7420 conditions, 1167 events. 611/1167 cut-off events. For 16430/16430 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6612 event pairs, 78 based on Foata normal form. 3/1154 useless extension candidates. Maximal degree in co-relation 7356. Up to 937 conditions per place. [2023-08-26 19:39:08,970 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 220 selfloop transitions, 71 changer transitions 21/312 dead transitions. [2023-08-26 19:39:08,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4004 flow [2023-08-26 19:39:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 19:39:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 19:39:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1412 transitions. [2023-08-26 19:39:08,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38898071625344355 [2023-08-26 19:39:08,973 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1412 transitions. [2023-08-26 19:39:08,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1412 transitions. [2023-08-26 19:39:08,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:08,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1412 transitions. [2023-08-26 19:39:08,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.18181818181819) internal successors, (1412), 22 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:08,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:08,979 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:08,979 INFO L175 Difference]: Start difference. First operand has 207 places, 228 transitions, 2422 flow. Second operand 22 states and 1412 transitions. [2023-08-26 19:39:08,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4004 flow [2023-08-26 19:39:09,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 312 transitions, 3754 flow, removed 95 selfloop flow, removed 16 redundant places. [2023-08-26 19:39:09,053 INFO L231 Difference]: Finished difference. Result has 214 places, 259 transitions, 2979 flow [2023-08-26 19:39:09,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2979, PETRI_PLACES=214, PETRI_TRANSITIONS=259} [2023-08-26 19:39:09,053 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 186 predicate places. [2023-08-26 19:39:09,054 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 259 transitions, 2979 flow [2023-08-26 19:39:09,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:09,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:09,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:09,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:09,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 19:39:09,259 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:09,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1508407487, now seen corresponding path program 13 times [2023-08-26 19:39:09,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:09,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575396767] [2023-08-26 19:39:09,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:09,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:09,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:09,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:09,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575396767] [2023-08-26 19:39:09,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575396767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:09,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374595069] [2023-08-26 19:39:09,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:39:09,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:09,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:09,633 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:09,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 19:39:09,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:09,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:39:09,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:09,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:09,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:12,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374595069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:12,881 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:12,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:39:12,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194124030] [2023-08-26 19:39:12,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:12,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:39:12,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:39:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:39:12,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:12,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 259 transitions, 2979 flow. Second operand has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:12,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:12,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:12,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:15,430 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 19:39:15,839 INFO L124 PetriNetUnfolderBase]: 630/1185 cut-off events. [2023-08-26 19:39:15,839 INFO L125 PetriNetUnfolderBase]: For 16320/16320 co-relation queries the response was YES. [2023-08-26 19:39:15,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 1185 events. 630/1185 cut-off events. For 16320/16320 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 6649 event pairs, 78 based on Foata normal form. 2/1169 useless extension candidates. Maximal degree in co-relation 7819. Up to 1043 conditions per place. [2023-08-26 19:39:15,846 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 242 selfloop transitions, 52 changer transitions 10/304 dead transitions. [2023-08-26 19:39:15,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 304 transitions, 4204 flow [2023-08-26 19:39:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 19:39:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 19:39:15,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1021 transitions. [2023-08-26 19:39:15,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867424242424242 [2023-08-26 19:39:15,848 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1021 transitions. [2023-08-26 19:39:15,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1021 transitions. [2023-08-26 19:39:15,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:15,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1021 transitions. [2023-08-26 19:39:15,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:15,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:15,851 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 165.0) internal successors, (2805), 17 states have internal predecessors, (2805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:15,851 INFO L175 Difference]: Start difference. First operand has 214 places, 259 transitions, 2979 flow. Second operand 16 states and 1021 transitions. [2023-08-26 19:39:15,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 304 transitions, 4204 flow [2023-08-26 19:39:15,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 304 transitions, 3696 flow, removed 242 selfloop flow, removed 9 redundant places. [2023-08-26 19:39:15,906 INFO L231 Difference]: Finished difference. Result has 223 places, 272 transitions, 3008 flow [2023-08-26 19:39:15,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3008, PETRI_PLACES=223, PETRI_TRANSITIONS=272} [2023-08-26 19:39:15,906 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 195 predicate places. [2023-08-26 19:39:15,907 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 272 transitions, 3008 flow [2023-08-26 19:39:15,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.94444444444444) internal successors, (1097), 18 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:15,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:15,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:15,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:16,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 19:39:16,107 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:16,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash -932546927, now seen corresponding path program 14 times [2023-08-26 19:39:16,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:16,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090675379] [2023-08-26 19:39:16,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:16,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090675379] [2023-08-26 19:39:16,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090675379] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:16,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270385435] [2023-08-26 19:39:16,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:39:16,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:16,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:16,604 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:16,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 19:39:16,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:39:16,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:39:16,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:39:16,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:16,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:17,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270385435] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:17,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:17,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 19:39:17,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514182019] [2023-08-26 19:39:17,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:17,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:39:17,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:39:17,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:39:17,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:17,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 272 transitions, 3008 flow. Second operand has 19 states, 19 states have (on average 60.89473684210526) internal successors, (1157), 19 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:17,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:17,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:17,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:19,908 INFO L124 PetriNetUnfolderBase]: 671/1266 cut-off events. [2023-08-26 19:39:19,909 INFO L125 PetriNetUnfolderBase]: For 21651/21651 co-relation queries the response was YES. [2023-08-26 19:39:19,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8620 conditions, 1266 events. 671/1266 cut-off events. For 21651/21651 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7232 event pairs, 72 based on Foata normal form. 3/1245 useless extension candidates. Maximal degree in co-relation 8554. Up to 996 conditions per place. [2023-08-26 19:39:19,920 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 234 selfloop transitions, 91 changer transitions 16/341 dead transitions. [2023-08-26 19:39:19,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 341 transitions, 4503 flow [2023-08-26 19:39:19,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 19:39:19,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 19:39:19,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1540 transitions. [2023-08-26 19:39:19,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-26 19:39:19,927 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1540 transitions. [2023-08-26 19:39:19,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1540 transitions. [2023-08-26 19:39:19,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:19,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1540 transitions. [2023-08-26 19:39:19,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 64.16666666666667) internal successors, (1540), 24 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:19,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:19,932 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 165.0) internal successors, (4125), 25 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:19,932 INFO L175 Difference]: Start difference. First operand has 223 places, 272 transitions, 3008 flow. Second operand 24 states and 1540 transitions. [2023-08-26 19:39:19,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 341 transitions, 4503 flow [2023-08-26 19:39:20,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 341 transitions, 4194 flow, removed 131 selfloop flow, removed 9 redundant places. [2023-08-26 19:39:20,026 INFO L231 Difference]: Finished difference. Result has 238 places, 286 transitions, 3343 flow [2023-08-26 19:39:20,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2707, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3343, PETRI_PLACES=238, PETRI_TRANSITIONS=286} [2023-08-26 19:39:20,027 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 210 predicate places. [2023-08-26 19:39:20,027 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 286 transitions, 3343 flow [2023-08-26 19:39:20,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.89473684210526) internal successors, (1157), 19 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:20,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:20,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:20,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:20,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-26 19:39:20,232 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:20,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:20,233 INFO L85 PathProgramCache]: Analyzing trace with hash 515271591, now seen corresponding path program 15 times [2023-08-26 19:39:20,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:20,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741376507] [2023-08-26 19:39:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:20,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:20,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:20,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741376507] [2023-08-26 19:39:20,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741376507] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:20,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42754060] [2023-08-26 19:39:20,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:39:20,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:20,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:20,596 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:20,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-26 19:39:20,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 19:39:20,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:39:20,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:39:20,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:20,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:21,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42754060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:21,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:21,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 17 [2023-08-26 19:39:21,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406810574] [2023-08-26 19:39:21,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:21,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:39:21,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:21,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:39:21,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-26 19:39:21,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:21,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 286 transitions, 3343 flow. Second operand has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:21,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:21,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:21,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:23,308 INFO L124 PetriNetUnfolderBase]: 668/1269 cut-off events. [2023-08-26 19:39:23,309 INFO L125 PetriNetUnfolderBase]: For 22502/22502 co-relation queries the response was YES. [2023-08-26 19:39:23,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8587 conditions, 1269 events. 668/1269 cut-off events. For 22502/22502 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 7331 event pairs, 68 based on Foata normal form. 3/1246 useless extension candidates. Maximal degree in co-relation 8520. Up to 1079 conditions per place. [2023-08-26 19:39:23,320 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 255 selfloop transitions, 68 changer transitions 19/342 dead transitions. [2023-08-26 19:39:23,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 342 transitions, 4403 flow [2023-08-26 19:39:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 19:39:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 19:39:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1465 transitions. [2023-08-26 19:39:23,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38603425559947296 [2023-08-26 19:39:23,323 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1465 transitions. [2023-08-26 19:39:23,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1465 transitions. [2023-08-26 19:39:23,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:23,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1465 transitions. [2023-08-26 19:39:23,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.69565217391305) internal successors, (1465), 23 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:23,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:23,328 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:23,328 INFO L175 Difference]: Start difference. First operand has 238 places, 286 transitions, 3343 flow. Second operand 23 states and 1465 transitions. [2023-08-26 19:39:23,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 342 transitions, 4403 flow [2023-08-26 19:39:23,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 342 transitions, 3933 flow, removed 204 selfloop flow, removed 10 redundant places. [2023-08-26 19:39:23,433 INFO L231 Difference]: Finished difference. Result has 255 places, 291 transitions, 3232 flow [2023-08-26 19:39:23,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3232, PETRI_PLACES=255, PETRI_TRANSITIONS=291} [2023-08-26 19:39:23,434 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 227 predicate places. [2023-08-26 19:39:23,434 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 291 transitions, 3232 flow [2023-08-26 19:39:23,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:23,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:23,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:23,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:23,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:23,640 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:23,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1076926721, now seen corresponding path program 16 times [2023-08-26 19:39:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:23,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211941348] [2023-08-26 19:39:23,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:23,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:24,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:24,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211941348] [2023-08-26 19:39:24,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211941348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:24,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966367781] [2023-08-26 19:39:24,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:39:24,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:24,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:24,033 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:24,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-26 19:39:24,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:39:24,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:39:24,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:39:24,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:24,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:27,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966367781] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:27,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:27,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:39:27,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557015691] [2023-08-26 19:39:27,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:27,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:39:27,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:27,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:39:27,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:39:27,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:27,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 291 transitions, 3232 flow. Second operand has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:27,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:27,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:27,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:29,163 INFO L124 PetriNetUnfolderBase]: 668/1268 cut-off events. [2023-08-26 19:39:29,163 INFO L125 PetriNetUnfolderBase]: For 18311/18311 co-relation queries the response was YES. [2023-08-26 19:39:29,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8220 conditions, 1268 events. 668/1268 cut-off events. For 18311/18311 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7313 event pairs, 70 based on Foata normal form. 2/1244 useless extension candidates. Maximal degree in co-relation 8144. Up to 1111 conditions per place. [2023-08-26 19:39:29,175 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 275 selfloop transitions, 54 changer transitions 10/339 dead transitions. [2023-08-26 19:39:29,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 339 transitions, 4163 flow [2023-08-26 19:39:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 19:39:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 19:39:29,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1404 transitions. [2023-08-26 19:39:29,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867768595041322 [2023-08-26 19:39:29,179 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1404 transitions. [2023-08-26 19:39:29,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1404 transitions. [2023-08-26 19:39:29,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:29,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1404 transitions. [2023-08-26 19:39:29,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 63.81818181818182) internal successors, (1404), 22 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:29,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:29,184 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 165.0) internal successors, (3795), 23 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:29,184 INFO L175 Difference]: Start difference. First operand has 255 places, 291 transitions, 3232 flow. Second operand 22 states and 1404 transitions. [2023-08-26 19:39:29,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 339 transitions, 4163 flow [2023-08-26 19:39:29,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 339 transitions, 4036 flow, removed 31 selfloop flow, removed 15 redundant places. [2023-08-26 19:39:29,294 INFO L231 Difference]: Finished difference. Result has 261 places, 294 transitions, 3338 flow [2023-08-26 19:39:29,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3105, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3338, PETRI_PLACES=261, PETRI_TRANSITIONS=294} [2023-08-26 19:39:29,295 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 233 predicate places. [2023-08-26 19:39:29,295 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 294 transitions, 3338 flow [2023-08-26 19:39:29,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:29,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:29,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:29,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:29,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:29,500 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:29,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:29,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1528069547, now seen corresponding path program 17 times [2023-08-26 19:39:29,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:29,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968695356] [2023-08-26 19:39:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:29,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:29,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968695356] [2023-08-26 19:39:29,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968695356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:29,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109399958] [2023-08-26 19:39:29,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:39:29,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:29,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:29,908 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:29,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-26 19:39:29,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:39:29,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:39:29,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:39:29,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:30,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:33,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109399958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:33,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:33,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:39:33,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204854762] [2023-08-26 19:39:33,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:33,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:39:33,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:39:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:39:33,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:33,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 294 transitions, 3338 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:33,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:33,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:33,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:35,085 INFO L124 PetriNetUnfolderBase]: 689/1324 cut-off events. [2023-08-26 19:39:35,085 INFO L125 PetriNetUnfolderBase]: For 22053/22053 co-relation queries the response was YES. [2023-08-26 19:39:35,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9003 conditions, 1324 events. 689/1324 cut-off events. For 22053/22053 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 7773 event pairs, 78 based on Foata normal form. 3/1301 useless extension candidates. Maximal degree in co-relation 8926. Up to 1138 conditions per place. [2023-08-26 19:39:35,096 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 273 selfloop transitions, 62 changer transitions 10/345 dead transitions. [2023-08-26 19:39:35,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 345 transitions, 4657 flow [2023-08-26 19:39:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:39:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:39:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1090 transitions. [2023-08-26 19:39:35,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38859180035650626 [2023-08-26 19:39:35,106 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1090 transitions. [2023-08-26 19:39:35,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1090 transitions. [2023-08-26 19:39:35,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:35,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1090 transitions. [2023-08-26 19:39:35,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.11764705882354) internal successors, (1090), 17 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:35,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:35,110 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:35,110 INFO L175 Difference]: Start difference. First operand has 261 places, 294 transitions, 3338 flow. Second operand 17 states and 1090 transitions. [2023-08-26 19:39:35,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 345 transitions, 4657 flow [2023-08-26 19:39:35,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 345 transitions, 4433 flow, removed 78 selfloop flow, removed 19 redundant places. [2023-08-26 19:39:35,223 INFO L231 Difference]: Finished difference. Result has 263 places, 306 transitions, 3661 flow [2023-08-26 19:39:35,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3661, PETRI_PLACES=263, PETRI_TRANSITIONS=306} [2023-08-26 19:39:35,224 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 235 predicate places. [2023-08-26 19:39:35,224 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 306 transitions, 3661 flow [2023-08-26 19:39:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:35,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:35,224 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:35,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:35,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-26 19:39:35,425 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:35,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:35,425 INFO L85 PathProgramCache]: Analyzing trace with hash -448827175, now seen corresponding path program 18 times [2023-08-26 19:39:35,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:35,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748786024] [2023-08-26 19:39:35,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:35,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:36,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:36,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:36,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748786024] [2023-08-26 19:39:36,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748786024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:36,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897415279] [2023-08-26 19:39:36,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:39:36,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:36,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:36,102 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:36,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-26 19:39:36,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 19:39:36,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:39:36,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:39:36,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:36,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:39,159 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* (div (+ (mod c_~x_2~0 4294967296) (- 4294967294)) 4294967296) 4294967296)) (.cse0 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse2 (* (div c_~x_2~0 4294967296) 4294967296)) (.cse3 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296))) (and (forall ((v_z_266 Int)) (or (< .cse0 v_z_266) (let ((.cse1 (* 2 v_z_266))) (< (+ .cse1 c_~x_1~0 .cse2) (+ c_~x_2~0 3 (* (div (+ .cse1 c_~x_1~0) 4294967296) 4294967296)))) (<= v_z_266 .cse3))) (forall ((v_z_266 Int)) (or (< .cse0 v_z_266) (let ((.cse4 (* 2 v_z_266))) (< (+ c_~x_2~0 (* (div (+ .cse4 c_~x_1~0) 4294967296) 4294967296)) (+ .cse4 c_~x_1~0 4294967295 .cse5 .cse2))) (<= v_z_266 .cse3))) (forall ((v_z_266 Int)) (or (< .cse0 v_z_266) (let ((.cse6 (* 2 v_z_266))) (< (+ .cse6 c_~x_1~0 .cse5 .cse2 4294967293) (+ c_~x_2~0 (* (div (+ .cse6 c_~x_1~0) 4294967296) 4294967296)))) (<= v_z_266 .cse3))) (forall ((v_z_266 Int)) (or (< .cse0 v_z_266) (let ((.cse7 (* 2 v_z_266))) (< (+ c_~x_2~0 (* (div (+ .cse7 c_~x_1~0) 4294967296) 4294967296)) (+ .cse7 c_~x_1~0 4294967295 .cse2))) (<= v_z_266 .cse3))))) is different from false [2023-08-26 19:39:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 19:39:39,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897415279] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:39,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:39,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-26 19:39:39,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739449998] [2023-08-26 19:39:39,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:39,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 19:39:39,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:39,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 19:39:39,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=331, Unknown=1, NotChecked=38, Total=462 [2023-08-26 19:39:39,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:39,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 306 transitions, 3661 flow. Second operand has 22 states, 22 states have (on average 60.72727272727273) internal successors, (1336), 22 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:39,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:39,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:39,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:45,099 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 19:39:47,926 INFO L124 PetriNetUnfolderBase]: 748/1441 cut-off events. [2023-08-26 19:39:47,926 INFO L125 PetriNetUnfolderBase]: For 29373/29373 co-relation queries the response was YES. [2023-08-26 19:39:47,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10502 conditions, 1441 events. 748/1441 cut-off events. For 29373/29373 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 8635 event pairs, 72 based on Foata normal form. 4/1421 useless extension candidates. Maximal degree in co-relation 10421. Up to 1069 conditions per place. [2023-08-26 19:39:47,939 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 261 selfloop transitions, 128 changer transitions 17/406 dead transitions. [2023-08-26 19:39:47,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 406 transitions, 5804 flow [2023-08-26 19:39:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 19:39:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 19:39:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2109 transitions. [2023-08-26 19:39:47,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38732782369146007 [2023-08-26 19:39:47,949 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2109 transitions. [2023-08-26 19:39:47,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2109 transitions. [2023-08-26 19:39:47,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:47,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2109 transitions. [2023-08-26 19:39:47,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 63.90909090909091) internal successors, (2109), 33 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:47,956 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 165.0) internal successors, (5610), 34 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:47,957 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 165.0) internal successors, (5610), 34 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:47,957 INFO L175 Difference]: Start difference. First operand has 263 places, 306 transitions, 3661 flow. Second operand 33 states and 2109 transitions. [2023-08-26 19:39:47,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 406 transitions, 5804 flow [2023-08-26 19:39:48,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 406 transitions, 5468 flow, removed 141 selfloop flow, removed 13 redundant places. [2023-08-26 19:39:48,080 INFO L231 Difference]: Finished difference. Result has 288 places, 336 transitions, 4595 flow [2023-08-26 19:39:48,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=4595, PETRI_PLACES=288, PETRI_TRANSITIONS=336} [2023-08-26 19:39:48,081 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 260 predicate places. [2023-08-26 19:39:48,081 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 336 transitions, 4595 flow [2023-08-26 19:39:48,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.72727272727273) internal successors, (1336), 22 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:48,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:48,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:48,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-26 19:39:48,282 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:48,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -188490221, now seen corresponding path program 19 times [2023-08-26 19:39:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:48,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272080646] [2023-08-26 19:39:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:48,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272080646] [2023-08-26 19:39:48,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272080646] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:48,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493868144] [2023-08-26 19:39:48,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:39:48,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:48,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:48,677 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:48,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-26 19:39:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:48,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:39:48,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:48,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:51,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493868144] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:51,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:51,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2023-08-26 19:39:51,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884739886] [2023-08-26 19:39:51,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:51,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 19:39:51,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:51,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 19:39:51,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-08-26 19:39:51,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:51,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 336 transitions, 4595 flow. Second operand has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:51,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:51,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:51,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:52,376 INFO L124 PetriNetUnfolderBase]: 744/1438 cut-off events. [2023-08-26 19:39:52,377 INFO L125 PetriNetUnfolderBase]: For 27405/27405 co-relation queries the response was YES. [2023-08-26 19:39:52,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10572 conditions, 1438 events. 744/1438 cut-off events. For 27405/27405 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8629 event pairs, 88 based on Foata normal form. 3/1419 useless extension candidates. Maximal degree in co-relation 10487. Up to 1357 conditions per place. [2023-08-26 19:39:52,389 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 319 selfloop transitions, 36 changer transitions 8/363 dead transitions. [2023-08-26 19:39:52,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 363 transitions, 5554 flow [2023-08-26 19:39:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 19:39:52,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 19:39:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 950 transitions. [2023-08-26 19:39:52,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3838383838383838 [2023-08-26 19:39:52,392 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 950 transitions. [2023-08-26 19:39:52,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 950 transitions. [2023-08-26 19:39:52,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:39:52,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 950 transitions. [2023-08-26 19:39:52,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 63.333333333333336) internal successors, (950), 15 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:52,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 165.0) internal successors, (2640), 16 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:52,395 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 165.0) internal successors, (2640), 16 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:52,395 INFO L175 Difference]: Start difference. First operand has 288 places, 336 transitions, 4595 flow. Second operand 15 states and 950 transitions. [2023-08-26 19:39:52,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 363 transitions, 5554 flow [2023-08-26 19:39:52,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 363 transitions, 4737 flow, removed 354 selfloop flow, removed 19 redundant places. [2023-08-26 19:39:52,547 INFO L231 Difference]: Finished difference. Result has 285 places, 339 transitions, 3959 flow [2023-08-26 19:39:52,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3778, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3959, PETRI_PLACES=285, PETRI_TRANSITIONS=339} [2023-08-26 19:39:52,547 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 257 predicate places. [2023-08-26 19:39:52,547 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 339 transitions, 3959 flow [2023-08-26 19:39:52,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 60.888888888888886) internal successors, (1096), 18 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:52,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:39:52,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:39:52,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-26 19:39:52,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:52,748 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:39:52,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:39:52,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1197305107, now seen corresponding path program 20 times [2023-08-26 19:39:52,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:39:52,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103586338] [2023-08-26 19:39:52,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:39:52,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:39:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:39:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:39:53,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103586338] [2023-08-26 19:39:53,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103586338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:39:53,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856530008] [2023-08-26 19:39:53,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:39:53,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:39:53,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:39:53,363 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:39:53,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-26 19:39:53,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:39:53,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:39:53,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:39:53,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:39:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:53,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:39:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:39:55,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856530008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:39:55,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:39:55,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-26 19:39:55,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424337668] [2023-08-26 19:39:55,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:39:55,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 19:39:55,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:39:55,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 19:39:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2023-08-26 19:39:55,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:39:55,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 339 transitions, 3959 flow. Second operand has 21 states, 21 states have (on average 60.857142857142854) internal successors, (1278), 21 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:39:55,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:39:55,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:39:55,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:39:59,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:40:03,094 WARN L539 Checker$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 19:40:05,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:40:08,314 WARN L539 Checker$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 19:40:12,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:40:16,556 WARN L539 Checker$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 19:40:18,629 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 19:40:20,426 INFO L124 PetriNetUnfolderBase]: 877/1680 cut-off events. [2023-08-26 19:40:20,426 INFO L125 PetriNetUnfolderBase]: For 43106/43106 co-relation queries the response was YES. [2023-08-26 19:40:20,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12801 conditions, 1680 events. 877/1680 cut-off events. For 43106/43106 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 10399 event pairs, 53 based on Foata normal form. 5/1661 useless extension candidates. Maximal degree in co-relation 12714. Up to 1237 conditions per place. [2023-08-26 19:40:20,441 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 337 selfloop transitions, 108 changer transitions 27/472 dead transitions. [2023-08-26 19:40:20,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 472 transitions, 6593 flow [2023-08-26 19:40:20,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 19:40:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 19:40:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2127 transitions. [2023-08-26 19:40:20,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.390633608815427 [2023-08-26 19:40:20,444 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2127 transitions. [2023-08-26 19:40:20,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2127 transitions. [2023-08-26 19:40:20,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:40:20,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2127 transitions. [2023-08-26 19:40:20,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 64.45454545454545) internal successors, (2127), 33 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:20,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 165.0) internal successors, (5610), 34 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:20,451 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 165.0) internal successors, (5610), 34 states have internal predecessors, (5610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:20,451 INFO L175 Difference]: Start difference. First operand has 285 places, 339 transitions, 3959 flow. Second operand 33 states and 2127 transitions. [2023-08-26 19:40:20,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 472 transitions, 6593 flow [2023-08-26 19:40:20,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 472 transitions, 6452 flow, removed 40 selfloop flow, removed 12 redundant places. [2023-08-26 19:40:20,626 INFO L231 Difference]: Finished difference. Result has 313 places, 377 transitions, 5145 flow [2023-08-26 19:40:20,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=3822, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5145, PETRI_PLACES=313, PETRI_TRANSITIONS=377} [2023-08-26 19:40:20,627 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 285 predicate places. [2023-08-26 19:40:20,627 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 377 transitions, 5145 flow [2023-08-26 19:40:20,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 60.857142857142854) internal successors, (1278), 21 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:20,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:40:20,627 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:40:20,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-26 19:40:20,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:40:20,828 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:40:20,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:40:20,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1067676895, now seen corresponding path program 5 times [2023-08-26 19:40:20,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:40:20,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803389758] [2023-08-26 19:40:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:40:20,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:40:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:40:21,022 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 19:40:21,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:40:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803389758] [2023-08-26 19:40:21,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803389758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:40:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507770963] [2023-08-26 19:40:21,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:40:21,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:40:21,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:40:21,024 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:40:21,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-26 19:40:21,170 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 19:40:21,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:40:21,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 19:40:21,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:40:21,304 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 19:40:21,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:40:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:40:21,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507770963] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:40:21,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:40:21,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 14 [2023-08-26 19:40:21,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201811573] [2023-08-26 19:40:21,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:40:21,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 19:40:21,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:40:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 19:40:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-26 19:40:21,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 19:40:21,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 377 transitions, 5145 flow. Second operand has 16 states, 16 states have (on average 63.5625) internal successors, (1017), 16 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:21,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:40:21,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 19:40:21,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:40:22,363 INFO L124 PetriNetUnfolderBase]: 859/1659 cut-off events. [2023-08-26 19:40:22,364 INFO L125 PetriNetUnfolderBase]: For 44563/44563 co-relation queries the response was YES. [2023-08-26 19:40:22,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13157 conditions, 1659 events. 859/1659 cut-off events. For 44563/44563 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 10335 event pairs, 56 based on Foata normal form. 5/1642 useless extension candidates. Maximal degree in co-relation 13062. Up to 1376 conditions per place. [2023-08-26 19:40:22,379 INFO L140 encePairwiseOnDemand]: 158/165 looper letters, 339 selfloop transitions, 72 changer transitions 25/436 dead transitions. [2023-08-26 19:40:22,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 436 transitions, 6828 flow [2023-08-26 19:40:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 19:40:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 19:40:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1263 transitions. [2023-08-26 19:40:22,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028708133971292 [2023-08-26 19:40:22,380 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1263 transitions. [2023-08-26 19:40:22,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1263 transitions. [2023-08-26 19:40:22,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:40:22,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1263 transitions. [2023-08-26 19:40:22,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 66.47368421052632) internal successors, (1263), 19 states have internal predecessors, (1263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:22,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:22,384 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:22,384 INFO L175 Difference]: Start difference. First operand has 313 places, 377 transitions, 5145 flow. Second operand 19 states and 1263 transitions. [2023-08-26 19:40:22,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 436 transitions, 6828 flow [2023-08-26 19:40:22,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 436 transitions, 5824 flow, removed 471 selfloop flow, removed 15 redundant places. [2023-08-26 19:40:22,588 INFO L231 Difference]: Finished difference. Result has 315 places, 376 transitions, 4551 flow [2023-08-26 19:40:22,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4551, PETRI_PLACES=315, PETRI_TRANSITIONS=376} [2023-08-26 19:40:22,589 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 287 predicate places. [2023-08-26 19:40:22,589 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 376 transitions, 4551 flow [2023-08-26 19:40:22,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 63.5625) internal successors, (1017), 16 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:22,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:40:22,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:40:22,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-26 19:40:22,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:40:22,790 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:40:22,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:40:22,791 INFO L85 PathProgramCache]: Analyzing trace with hash 989567241, now seen corresponding path program 21 times [2023-08-26 19:40:22,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:40:22,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159694649] [2023-08-26 19:40:22,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:40:22,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:40:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:40:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:40:23,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:40:23,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159694649] [2023-08-26 19:40:23,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159694649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:40:23,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717213788] [2023-08-26 19:40:23,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:40:23,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:40:23,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:40:23,318 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:40:23,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-26 19:40:23,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 19:40:23,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:40:23,412 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:40:23,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:40:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:40:24,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:40:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:40:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717213788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:40:27,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:40:27,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-08-26 19:40:27,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738640360] [2023-08-26 19:40:27,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:40:27,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 19:40:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:40:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 19:40:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-08-26 19:40:27,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:40:27,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 376 transitions, 4551 flow. Second operand has 21 states, 21 states have (on average 60.80952380952381) internal successors, (1277), 21 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:27,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:40:27,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:40:27,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:40:31,332 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 19:40:36,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:40:42,254 WARN L539 Checker$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 19:40:44,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:40:47,349 WARN L539 Checker$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 19:40:49,479 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 19:40:50,038 INFO L124 PetriNetUnfolderBase]: 913/1760 cut-off events. [2023-08-26 19:40:50,038 INFO L125 PetriNetUnfolderBase]: For 48196/48196 co-relation queries the response was YES. [2023-08-26 19:40:50,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13526 conditions, 1760 events. 913/1760 cut-off events. For 48196/48196 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 11076 event pairs, 59 based on Foata normal form. 2/1734 useless extension candidates. Maximal degree in co-relation 13433. Up to 1216 conditions per place. [2023-08-26 19:40:50,054 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 330 selfloop transitions, 139 changer transitions 11/480 dead transitions. [2023-08-26 19:40:50,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 480 transitions, 6828 flow [2023-08-26 19:40:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-26 19:40:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-26 19:40:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2186 transitions. [2023-08-26 19:40:50,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38966131907308377 [2023-08-26 19:40:50,057 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2186 transitions. [2023-08-26 19:40:50,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2186 transitions. [2023-08-26 19:40:50,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:40:50,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2186 transitions. [2023-08-26 19:40:50,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 64.29411764705883) internal successors, (2186), 34 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:50,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 165.0) internal successors, (5775), 35 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:50,064 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 165.0) internal successors, (5775), 35 states have internal predecessors, (5775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:50,064 INFO L175 Difference]: Start difference. First operand has 315 places, 376 transitions, 4551 flow. Second operand 34 states and 2186 transitions. [2023-08-26 19:40:50,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 480 transitions, 6828 flow [2023-08-26 19:40:50,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 480 transitions, 6638 flow, removed 39 selfloop flow, removed 17 redundant places. [2023-08-26 19:40:50,269 INFO L231 Difference]: Finished difference. Result has 337 places, 394 transitions, 5367 flow [2023-08-26 19:40:50,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4377, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5367, PETRI_PLACES=337, PETRI_TRANSITIONS=394} [2023-08-26 19:40:50,270 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 309 predicate places. [2023-08-26 19:40:50,270 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 394 transitions, 5367 flow [2023-08-26 19:40:50,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 60.80952380952381) internal successors, (1277), 21 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:40:50,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:40:50,271 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:40:50,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-26 19:40:50,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-26 19:40:50,475 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:40:50,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:40:50,476 INFO L85 PathProgramCache]: Analyzing trace with hash -957388329, now seen corresponding path program 6 times [2023-08-26 19:40:50,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:40:50,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221976672] [2023-08-26 19:40:50,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:40:50,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:40:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:40:50,694 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 19:40:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:40:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221976672] [2023-08-26 19:40:50,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221976672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:40:50,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603541536] [2023-08-26 19:40:50,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:40:50,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:40:50,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:40:50,696 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:40:50,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-26 19:40:50,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 19:40:50,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:40:50,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 19:40:50,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:40:50,893 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 19:40:50,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:41:30,551 WARN L234 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 31 DAG size of output: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:41:37,243 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (mod c_~x_2~0 4294967296)) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_323)) (.cse2 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (< v_z_323 0) (= .cse0 .cse1) (< .cse2 0) (< 0 .cse2) (<= 4294967296 v_z_323)))) is different from false [2023-08-26 19:41:39,253 WARN L861 $PredicateComparison]: unable to prove that (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (mod c_~x_2~0 4294967296)) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_323)) (.cse2 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (< v_z_323 0) (= .cse0 .cse1) (< .cse2 0) (< 0 .cse2) (<= 4294967296 v_z_323)))) is different from true [2023-08-26 19:42:04,983 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (< v_z_323 0) (= (mod c_~x_2~0 4294967296) (+ (mod c_~x_1~0 4294967296) v_z_323)) (< .cse0 0) (< 0 .cse0) (<= 4294967296 v_z_323)))) is different from false [2023-08-26 19:42:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:42:04,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603541536] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:42:04,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:42:04,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 17 [2023-08-26 19:42:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697881103] [2023-08-26 19:42:04,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:42:04,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:42:04,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:42:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:42:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=8, NotChecked=62, Total=342 [2023-08-26 19:42:04,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 19:42:04,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 394 transitions, 5367 flow. Second operand has 19 states, 19 states have (on average 63.1578947368421) internal successors, (1200), 19 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:42:04,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:42:04,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 19:42:04,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:42:06,999 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 [1] [2023-08-26 19:42:09,035 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (< v_z_323 0) (= (mod c_~x_2~0 4294967296) (+ (mod c_~x_1~0 4294967296) v_z_323)) (< .cse0 0) (< 0 .cse0) (<= 4294967296 v_z_323)))) (= c_~x_1~0 0)) is different from false [2023-08-26 19:42:11,051 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (mod c_~x_2~0 4294967296)) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_323)) (.cse2 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (< v_z_323 0) (= .cse0 .cse1) (< .cse2 0) (< 0 .cse2) (<= 4294967296 v_z_323)))) (= c_~x_1~0 0)) is different from false [2023-08-26 19:42:13,070 WARN L839 $PredicateComparison]: unable to prove that (and (or (< 4294967294 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (forall ((v_z_323 Int) (v_y_323 Int)) (let ((.cse0 (mod c_~x_2~0 4294967296)) (.cse1 (+ (mod c_~x_1~0 4294967296) v_z_323)) (.cse2 (+ (* 2863311531 v_z_323) (* v_y_323 4294967296)))) (or (= (+ .cse0 4294967296) .cse1) (< v_z_323 0) (= .cse0 .cse1) (< .cse2 0) (< 0 .cse2) (<= 4294967296 v_z_323))))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:42:15,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:42:17,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:42:19,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:42:23,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:42:25,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:42:27,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:42:29,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:42:31,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:42:35,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:03,000 WARN L234 SmtUtils]: Spent 20.29s on a formula simplification. DAG size of input: 47 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:43:05,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:07,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:13,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:17,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:19,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:21,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:23,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:25,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:27,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:29,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:31,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:33,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:35,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:37,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:39,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:41,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:43,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:45,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:52,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:54,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:56,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:43:58,174 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:00,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:02,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:04,379 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:06,446 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:08,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:10,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:12,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:14,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:44:15,053 INFO L124 PetriNetUnfolderBase]: 1004/1946 cut-off events. [2023-08-26 19:44:15,053 INFO L125 PetriNetUnfolderBase]: For 69500/69500 co-relation queries the response was YES. [2023-08-26 19:44:15,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16838 conditions, 1946 events. 1004/1946 cut-off events. For 69500/69500 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 12548 event pairs, 68 based on Foata normal form. 4/1928 useless extension candidates. Maximal degree in co-relation 16742. Up to 1456 conditions per place. [2023-08-26 19:44:15,069 INFO L140 encePairwiseOnDemand]: 154/165 looper letters, 385 selfloop transitions, 90 changer transitions 10/485 dead transitions. [2023-08-26 19:44:15,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 485 transitions, 8014 flow [2023-08-26 19:44:15,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 19:44:15,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 19:44:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1198 transitions. [2023-08-26 19:44:15,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4033670033670034 [2023-08-26 19:44:15,071 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1198 transitions. [2023-08-26 19:44:15,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1198 transitions. [2023-08-26 19:44:15,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:44:15,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1198 transitions. [2023-08-26 19:44:15,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.55555555555556) internal successors, (1198), 18 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:15,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:15,075 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 165.0) internal successors, (3135), 19 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:15,075 INFO L175 Difference]: Start difference. First operand has 337 places, 394 transitions, 5367 flow. Second operand 18 states and 1198 transitions. [2023-08-26 19:44:15,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 485 transitions, 8014 flow [2023-08-26 19:44:15,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 485 transitions, 7463 flow, removed 203 selfloop flow, removed 22 redundant places. [2023-08-26 19:44:15,355 INFO L231 Difference]: Finished difference. Result has 339 places, 424 transitions, 5996 flow [2023-08-26 19:44:15,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=4848, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5996, PETRI_PLACES=339, PETRI_TRANSITIONS=424} [2023-08-26 19:44:15,356 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 311 predicate places. [2023-08-26 19:44:15,356 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 424 transitions, 5996 flow [2023-08-26 19:44:15,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.1578947368421) internal successors, (1200), 19 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:44:15,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:44:15,357 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:44:15,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-26 19:44:15,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-26 19:44:15,557 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:44:15,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:44:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash -52726057, now seen corresponding path program 7 times [2023-08-26 19:44:15,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:44:15,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154940900] [2023-08-26 19:44:15,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:44:15,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:44:15,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:44:15,799 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 19:44:15,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:44:15,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154940900] [2023-08-26 19:44:15,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154940900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:44:15,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230227626] [2023-08-26 19:44:15,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:44:15,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:44:15,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:44:15,805 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:44:15,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-26 19:44:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:44:15,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 19:44:15,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:44:16,193 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 19:44:16,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:44:56,789 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse0 (+ (mod c_~x_1~0 4294967296) v_z_328)) (.cse1 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (<= 4294967296 .cse0) (= .cse0 (mod c_~x_2~0 4294967296)) (< 0 .cse1) (< .cse1 0) (< v_z_328 0)))) is different from false [2023-08-26 19:45:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:45:01,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230227626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:45:01,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:45:01,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2023-08-26 19:45:01,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699934642] [2023-08-26 19:45:01,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:45:01,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:45:01,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:45:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:45:01,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=224, Unknown=8, NotChecked=32, Total=342 [2023-08-26 19:45:01,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 19:45:01,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 424 transitions, 5996 flow. Second operand has 19 states, 19 states have (on average 63.21052631578947) internal successors, (1201), 19 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:45:01,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:45:01,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 19:45:01,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:45:03,150 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 [1] [2023-08-26 19:45:05,191 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_~x_1~0 0) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse0 (+ (mod c_~x_1~0 4294967296) v_z_328)) (.cse1 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (<= 4294967296 .cse0) (= .cse0 (mod c_~x_2~0 4294967296)) (< 0 .cse1) (< .cse1 0) (< v_z_328 0))))) is different from false [2023-08-26 19:45:07,215 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (or (< 4294967294 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (forall ((v_y_328 Int) (v_z_328 Int)) (let ((.cse0 (+ (mod c_~x_1~0 4294967296) v_z_328)) (.cse1 (+ (* v_y_328 4294967296) (* 2863311531 v_z_328)))) (or (<= 4294967296 .cse0) (= .cse0 (mod c_~x_2~0 4294967296)) (< 0 .cse1) (< .cse1 0) (< v_z_328 0))))) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:45:09,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:11,275 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:13,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:17,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:19,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:21,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:25,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:29,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:31,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:34,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:36,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:43,255 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:45,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:47,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:49,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:51,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:53,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:55,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:57,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:45:59,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:46:01,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:46:03,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:46:05,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:46:07,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:46:10,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:46:12,089 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 [1] [2023-08-26 19:46:12,133 INFO L124 PetriNetUnfolderBase]: 1061/2092 cut-off events. [2023-08-26 19:46:12,133 INFO L125 PetriNetUnfolderBase]: For 83269/83269 co-relation queries the response was YES. [2023-08-26 19:46:12,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19168 conditions, 2092 events. 1061/2092 cut-off events. For 83269/83269 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 13937 event pairs, 100 based on Foata normal form. 4/2074 useless extension candidates. Maximal degree in co-relation 19064. Up to 1746 conditions per place. [2023-08-26 19:46:12,159 INFO L140 encePairwiseOnDemand]: 155/165 looper letters, 401 selfloop transitions, 68 changer transitions 32/501 dead transitions. [2023-08-26 19:46:12,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 501 transitions, 8363 flow [2023-08-26 19:46:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:46:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:46:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1140 transitions. [2023-08-26 19:46:12,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40641711229946526 [2023-08-26 19:46:12,161 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1140 transitions. [2023-08-26 19:46:12,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1140 transitions. [2023-08-26 19:46:12,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:46:12,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1140 transitions. [2023-08-26 19:46:12,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:12,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:12,164 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:12,164 INFO L175 Difference]: Start difference. First operand has 339 places, 424 transitions, 5996 flow. Second operand 17 states and 1140 transitions. [2023-08-26 19:46:12,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 501 transitions, 8363 flow [2023-08-26 19:46:12,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 501 transitions, 8052 flow, removed 148 selfloop flow, removed 5 redundant places. [2023-08-26 19:46:12,536 INFO L231 Difference]: Finished difference. Result has 355 places, 427 transitions, 6124 flow [2023-08-26 19:46:12,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6124, PETRI_PLACES=355, PETRI_TRANSITIONS=427} [2023-08-26 19:46:12,537 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 327 predicate places. [2023-08-26 19:46:12,537 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 427 transitions, 6124 flow [2023-08-26 19:46:12,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.21052631578947) internal successors, (1201), 19 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:12,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:46:12,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:46:12,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-26 19:46:12,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 19:46:12,737 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:46:12,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:46:12,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1466865303, now seen corresponding path program 22 times [2023-08-26 19:46:12,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:46:12,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177368504] [2023-08-26 19:46:12,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:46:12,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:46:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:46:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:46:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:46:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177368504] [2023-08-26 19:46:13,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177368504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:46:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224912244] [2023-08-26 19:46:13,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:46:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:46:13,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:46:13,507 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:46:13,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-26 19:46:13,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:46:13,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:46:13,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:46:13,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:46:14,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:46:14,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:46:17,501 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (div (+ (mod c_~x_1~0 4294967296) (- 4294967294)) 4294967296)) (.cse0 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)) (.cse2 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse3 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296))) (and (forall ((v_z_336 Int)) (or (<= v_z_336 .cse0) (let ((.cse1 (* 2 v_z_336))) (< (+ (* (div (+ c_~x_2~0 .cse1) 4294967296) 4294967296) c_~x_1~0) (+ c_~x_2~0 .cse1 4294967295 .cse2))) (< .cse3 v_z_336))) (forall ((v_z_336 Int)) (or (<= v_z_336 .cse0) (let ((.cse4 (* 2 v_z_336))) (< (+ c_~x_2~0 .cse4 .cse2) (+ (* (div (+ c_~x_2~0 .cse4) 4294967296) 4294967296) c_~x_1~0 3))) (< .cse3 v_z_336))) (or (< .cse5 0) (forall ((v_z_336 Int)) (or (<= v_z_336 .cse0) (let ((.cse6 (* 2 v_z_336))) (< (+ c_~x_2~0 .cse6 .cse2 4294967293) (+ (* (div (+ c_~x_2~0 .cse6) 4294967296) 4294967296) c_~x_1~0))) (< .cse3 v_z_336)))) (or (< 0 (+ .cse5 1)) (forall ((v_z_336 Int)) (or (<= v_z_336 .cse0) (let ((.cse7 (* 2 v_z_336))) (< (+ (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296) c_~x_1~0 1) (+ c_~x_2~0 .cse7 .cse2))) (< .cse3 v_z_336)))))) is different from false [2023-08-26 19:46:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 19:46:17,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224912244] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:46:17,657 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:46:17,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-26 19:46:17,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485053029] [2023-08-26 19:46:17,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:46:17,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-26 19:46:17,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:46:17,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-26 19:46:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=336, Unknown=1, NotChecked=38, Total=462 [2023-08-26 19:46:17,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:46:17,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 427 transitions, 6124 flow. Second operand has 22 states, 22 states have (on average 60.77272727272727) internal successors, (1337), 22 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:17,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:46:17,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:46:17,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:46:21,688 INFO L124 PetriNetUnfolderBase]: 1076/2111 cut-off events. [2023-08-26 19:46:21,688 INFO L125 PetriNetUnfolderBase]: For 78362/78362 co-relation queries the response was YES. [2023-08-26 19:46:21,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19035 conditions, 2111 events. 1076/2111 cut-off events. For 78362/78362 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14030 event pairs, 83 based on Foata normal form. 5/2094 useless extension candidates. Maximal degree in co-relation 18926. Up to 1724 conditions per place. [2023-08-26 19:46:21,712 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 365 selfloop transitions, 120 changer transitions 17/502 dead transitions. [2023-08-26 19:46:21,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 502 transitions, 7571 flow [2023-08-26 19:46:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 19:46:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 19:46:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1612 transitions. [2023-08-26 19:46:21,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3907878787878788 [2023-08-26 19:46:21,714 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1612 transitions. [2023-08-26 19:46:21,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1612 transitions. [2023-08-26 19:46:21,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:46:21,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1612 transitions. [2023-08-26 19:46:21,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 64.48) internal successors, (1612), 25 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:21,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:21,719 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:21,719 INFO L175 Difference]: Start difference. First operand has 355 places, 427 transitions, 6124 flow. Second operand 25 states and 1612 transitions. [2023-08-26 19:46:21,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 502 transitions, 7571 flow [2023-08-26 19:46:22,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 502 transitions, 7314 flow, removed 74 selfloop flow, removed 11 redundant places. [2023-08-26 19:46:22,128 INFO L231 Difference]: Finished difference. Result has 367 places, 434 transitions, 6250 flow [2023-08-26 19:46:22,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=5875, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=6250, PETRI_PLACES=367, PETRI_TRANSITIONS=434} [2023-08-26 19:46:22,129 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 339 predicate places. [2023-08-26 19:46:22,129 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 434 transitions, 6250 flow [2023-08-26 19:46:22,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 60.77272727272727) internal successors, (1337), 22 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:46:22,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:46:22,130 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:46:22,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-26 19:46:22,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-26 19:46:22,335 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:46:22,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:46:22,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1621019199, now seen corresponding path program 8 times [2023-08-26 19:46:22,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:46:22,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17085008] [2023-08-26 19:46:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:46:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:46:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:46:22,569 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 19:46:22,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:46:22,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17085008] [2023-08-26 19:46:22,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17085008] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:46:22,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499890829] [2023-08-26 19:46:22,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:46:22,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:46:22,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:46:22,572 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:46:22,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-26 19:46:22,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:46:22,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:46:22,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-26 19:46:22,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:46:22,938 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 19:46:22,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:46:49,244 WARN L234 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 33 DAG size of output: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:46:53,286 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_341 Int) (v_y_341 Int)) (let ((.cse0 (+ (* v_y_341 4294967296) (* 2863311531 v_z_341)))) (or (< v_z_341 0) (< 0 .cse0) (= (+ (mod c_~x_1~0 4294967296) v_z_341) (mod c_~x_2~0 4294967296)) (< .cse0 0) (<= 4294967296 v_z_341)))) is different from false [2023-08-26 19:47:01,416 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 19:47:01,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499890829] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:47:01,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:47:01,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 21 [2023-08-26 19:47:01,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477173163] [2023-08-26 19:47:01,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:47:01,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 19:47:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:47:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 19:47:01,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=357, Unknown=7, NotChecked=40, Total=506 [2023-08-26 19:47:01,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:47:01,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 434 transitions, 6250 flow. Second operand has 23 states, 23 states have (on average 60.869565217391305) internal successors, (1400), 23 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:47:01,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:47:01,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:47:01,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:47:03,427 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 [1] [2023-08-26 19:47:05,477 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_z_341 Int) (v_y_341 Int)) (let ((.cse0 (+ (* v_y_341 4294967296) (* 2863311531 v_z_341)))) (or (< v_z_341 0) (< 0 .cse0) (= (+ (mod c_~x_1~0 4294967296) v_z_341) (mod c_~x_2~0 4294967296)) (< .cse0 0) (<= 4294967296 v_z_341)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:47:07,496 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0) (or (forall ((v_z_341 Int) (v_y_341 Int)) (let ((.cse0 (+ (* v_y_341 4294967296) (* 2863311531 v_z_341)))) (or (< v_z_341 0) (< 0 .cse0) (= (+ (mod c_~x_1~0 4294967296) v_z_341) (mod c_~x_2~0 4294967296)) (< .cse0 0) (<= 4294967296 v_z_341)))) (< (mod (+ 3 c_thread1Thread1of1ForFork0_~i~0) 4294967296) (+ (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) 1)))) is different from false [2023-08-26 19:47:09,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:11,609 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:13,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:17,861 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:20,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:25,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:29,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:31,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:32,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:47:37,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:39,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:41,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:43,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:46,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:48,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:50,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:52,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:54,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:56,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:47:58,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:48:00,543 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:48:02,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:48:04,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:48:06,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:48:08,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:48:10,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:48:12,734 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:48:12,799 INFO L124 PetriNetUnfolderBase]: 1136/2204 cut-off events. [2023-08-26 19:48:12,799 INFO L125 PetriNetUnfolderBase]: For 79094/79094 co-relation queries the response was YES. [2023-08-26 19:48:12,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20028 conditions, 2204 events. 1136/2204 cut-off events. For 79094/79094 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 14647 event pairs, 40 based on Foata normal form. 4/2184 useless extension candidates. Maximal degree in co-relation 19914. Up to 1228 conditions per place. [2023-08-26 19:48:12,824 INFO L140 encePairwiseOnDemand]: 154/165 looper letters, 288 selfloop transitions, 233 changer transitions 21/542 dead transitions. [2023-08-26 19:48:12,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 542 transitions, 8701 flow [2023-08-26 19:48:12,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-26 19:48:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-26 19:48:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1791 transitions. [2023-08-26 19:48:12,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38766233766233765 [2023-08-26 19:48:12,826 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1791 transitions. [2023-08-26 19:48:12,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1791 transitions. [2023-08-26 19:48:12,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:48:12,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1791 transitions. [2023-08-26 19:48:12,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 63.964285714285715) internal successors, (1791), 28 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:12,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 165.0) internal successors, (4785), 29 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:12,830 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 165.0) internal successors, (4785), 29 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:12,830 INFO L175 Difference]: Start difference. First operand has 367 places, 434 transitions, 6250 flow. Second operand 28 states and 1791 transitions. [2023-08-26 19:48:12,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 542 transitions, 8701 flow [2023-08-26 19:48:13,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 542 transitions, 8499 flow, removed 36 selfloop flow, removed 17 redundant places. [2023-08-26 19:48:13,209 INFO L231 Difference]: Finished difference. Result has 392 places, 475 transitions, 7815 flow [2023-08-26 19:48:13,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=6081, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7815, PETRI_PLACES=392, PETRI_TRANSITIONS=475} [2023-08-26 19:48:13,210 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 364 predicate places. [2023-08-26 19:48:13,210 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 475 transitions, 7815 flow [2023-08-26 19:48:13,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 60.869565217391305) internal successors, (1400), 23 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:13,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:48:13,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:48:13,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-26 19:48:13,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-26 19:48:13,415 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:48:13,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:48:13,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1864601471, now seen corresponding path program 23 times [2023-08-26 19:48:13,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:48:13,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964822319] [2023-08-26 19:48:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:48:13,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:48:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:48:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:48:14,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:48:14,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964822319] [2023-08-26 19:48:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964822319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:48:14,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095318133] [2023-08-26 19:48:14,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:48:14,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:48:14,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:48:14,091 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:48:14,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-26 19:48:14,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 19:48:14,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:48:14,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:48:14,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:48:19,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:48:19,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:48:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:48:23,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095318133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:48:23,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:48:23,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 19:48:23,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597114619] [2023-08-26 19:48:23,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:48:23,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 19:48:23,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:48:23,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 19:48:23,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-26 19:48:23,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:48:23,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 475 transitions, 7815 flow. Second operand has 20 states, 20 states have (on average 60.8) internal successors, (1216), 20 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:23,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:48:23,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:48:23,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:48:25,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:48:28,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:48:30,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:48:32,679 WARN L539 Checker$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 19:48:36,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:48:38,459 WARN L539 Checker$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 19:48:41,127 INFO L124 PetriNetUnfolderBase]: 1135/2186 cut-off events. [2023-08-26 19:48:41,127 INFO L125 PetriNetUnfolderBase]: For 89662/89662 co-relation queries the response was YES. [2023-08-26 19:48:41,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21431 conditions, 2186 events. 1135/2186 cut-off events. For 89662/89662 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 14341 event pairs, 126 based on Foata normal form. 2/2186 useless extension candidates. Maximal degree in co-relation 21304. Up to 1989 conditions per place. [2023-08-26 19:48:41,152 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 402 selfloop transitions, 109 changer transitions 10/521 dead transitions. [2023-08-26 19:48:41,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 521 transitions, 9292 flow [2023-08-26 19:48:41,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 19:48:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 19:48:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1588 transitions. [2023-08-26 19:48:41,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38496969696969696 [2023-08-26 19:48:41,154 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1588 transitions. [2023-08-26 19:48:41,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1588 transitions. [2023-08-26 19:48:41,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:48:41,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1588 transitions. [2023-08-26 19:48:41,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 63.52) internal successors, (1588), 25 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:41,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:41,160 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 165.0) internal successors, (4290), 26 states have internal predecessors, (4290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:41,160 INFO L175 Difference]: Start difference. First operand has 392 places, 475 transitions, 7815 flow. Second operand 25 states and 1588 transitions. [2023-08-26 19:48:41,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 521 transitions, 9292 flow [2023-08-26 19:48:41,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 521 transitions, 8892 flow, removed 176 selfloop flow, removed 10 redundant places. [2023-08-26 19:48:41,616 INFO L231 Difference]: Finished difference. Result has 410 places, 482 transitions, 7884 flow [2023-08-26 19:48:41,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7423, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7884, PETRI_PLACES=410, PETRI_TRANSITIONS=482} [2023-08-26 19:48:41,617 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 382 predicate places. [2023-08-26 19:48:41,617 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 482 transitions, 7884 flow [2023-08-26 19:48:41,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.8) internal successors, (1216), 20 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:41,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:48:41,618 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:48:41,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-26 19:48:41,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:48:41,823 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:48:41,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:48:41,823 INFO L85 PathProgramCache]: Analyzing trace with hash -168683983, now seen corresponding path program 24 times [2023-08-26 19:48:41,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:48:41,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831366152] [2023-08-26 19:48:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:48:41,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:48:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:48:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:48:42,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:48:42,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831366152] [2023-08-26 19:48:42,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831366152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:48:42,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426440962] [2023-08-26 19:48:42,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:48:42,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:48:42,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:48:42,693 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:48:42,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-26 19:48:42,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 19:48:42,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:48:42,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:48:42,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:48:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:48:43,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:48:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:48:45,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426440962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:48:45,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:48:45,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 19:48:45,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239289548] [2023-08-26 19:48:45,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:48:45,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 19:48:45,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:48:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 19:48:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2023-08-26 19:48:45,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:48:45,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 482 transitions, 7884 flow. Second operand has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:48:45,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:48:45,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:48:45,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:48:47,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:48:53,114 WARN L539 Checker$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 19:48:55,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:48:58,777 WARN L539 Checker$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 19:49:01,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-26 19:49:04,162 WARN L539 Checker$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 19:49:05,029 INFO L124 PetriNetUnfolderBase]: 1166/2255 cut-off events. [2023-08-26 19:49:05,029 INFO L125 PetriNetUnfolderBase]: For 94384/94384 co-relation queries the response was YES. [2023-08-26 19:49:05,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22347 conditions, 2255 events. 1166/2255 cut-off events. For 94384/94384 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 15008 event pairs, 106 based on Foata normal form. 2/2255 useless extension candidates. Maximal degree in co-relation 22216. Up to 1909 conditions per place. [2023-08-26 19:49:05,056 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 389 selfloop transitions, 151 changer transitions 10/550 dead transitions. [2023-08-26 19:49:05,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 550 transitions, 9861 flow [2023-08-26 19:49:05,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-26 19:49:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-26 19:49:05,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1917 transitions. [2023-08-26 19:49:05,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38727272727272727 [2023-08-26 19:49:05,058 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1917 transitions. [2023-08-26 19:49:05,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1917 transitions. [2023-08-26 19:49:05,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:05,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1917 transitions. [2023-08-26 19:49:05,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 63.9) internal successors, (1917), 30 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:05,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 165.0) internal successors, (5115), 31 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:05,062 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 165.0) internal successors, (5115), 31 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:05,062 INFO L175 Difference]: Start difference. First operand has 410 places, 482 transitions, 7884 flow. Second operand 30 states and 1917 transitions. [2023-08-26 19:49:05,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 550 transitions, 9861 flow [2023-08-26 19:49:05,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 550 transitions, 9555 flow, removed 85 selfloop flow, removed 20 redundant places. [2023-08-26 19:49:05,537 INFO L231 Difference]: Finished difference. Result has 420 places, 492 transitions, 8462 flow [2023-08-26 19:49:05,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=7623, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=8462, PETRI_PLACES=420, PETRI_TRANSITIONS=492} [2023-08-26 19:49:05,537 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 392 predicate places. [2023-08-26 19:49:05,538 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 492 transitions, 8462 flow [2023-08-26 19:49:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:05,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:05,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:05,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-26 19:49:05,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:49:05,738 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:49:05,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:05,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1696657237, now seen corresponding path program 25 times [2023-08-26 19:49:05,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:05,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443006945] [2023-08-26 19:49:05,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:05,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:49:06,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443006945] [2023-08-26 19:49:06,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443006945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:49:06,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434685705] [2023-08-26 19:49:06,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 19:49:06,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:49:06,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:49:06,390 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:49:06,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-26 19:49:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:06,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:49:06,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:49:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:49:06,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:49:10,225 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_395 Int)) (or (< (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296) v_z_395) (< (+ c_~x_2~0 (* (div (+ (- 1) (* (- 1) c_~x_2~0) (* (- 2) v_z_395) c_~x_1~0 (mod (+ 2 c_thread2Thread1of1ForFork1_~i~1) 4294967296)) 4294967296) 4294967296) (* 2 v_z_395) 4294967294) (+ (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296) c_~x_1~0)) (<= v_z_395 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)))) is different from false [2023-08-26 19:49:12,250 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_395 Int)) (or (< (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296) v_z_395) (< (+ c_~x_2~0 (* (div (+ (* (- 1) c_~x_2~0) (* (- 2) v_z_395) c_~x_1~0 1) 4294967296) 4294967296) (* 2 v_z_395) 4294967293) c_~x_1~0) (<= v_z_395 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296)))) is different from false [2023-08-26 19:49:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-26 19:49:12,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434685705] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:49:12,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:49:12,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 19:49:12,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757836960] [2023-08-26 19:49:12,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:49:12,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 19:49:12,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:49:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 19:49:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=241, Unknown=2, NotChecked=66, Total=380 [2023-08-26 19:49:12,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:49:12,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 492 transitions, 8462 flow. Second operand has 20 states, 20 states have (on average 60.85) internal successors, (1217), 20 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:12,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:49:12,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:49:12,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:49:15,052 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 19:49:16,044 INFO L124 PetriNetUnfolderBase]: 1185/2292 cut-off events. [2023-08-26 19:49:16,045 INFO L125 PetriNetUnfolderBase]: For 102315/102315 co-relation queries the response was YES. [2023-08-26 19:49:16,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23192 conditions, 2292 events. 1185/2292 cut-off events. For 102315/102315 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 15285 event pairs, 125 based on Foata normal form. 2/2292 useless extension candidates. Maximal degree in co-relation 23059. Up to 2158 conditions per place. [2023-08-26 19:49:16,071 INFO L140 encePairwiseOnDemand]: 157/165 looper letters, 472 selfloop transitions, 54 changer transitions 10/536 dead transitions. [2023-08-26 19:49:16,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 536 transitions, 9974 flow [2023-08-26 19:49:16,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 19:49:16,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 19:49:16,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1088 transitions. [2023-08-26 19:49:16,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2023-08-26 19:49:16,073 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1088 transitions. [2023-08-26 19:49:16,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1088 transitions. [2023-08-26 19:49:16,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:49:16,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1088 transitions. [2023-08-26 19:49:16,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 64.0) internal successors, (1088), 17 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:16,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:16,075 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 165.0) internal successors, (2970), 18 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:16,075 INFO L175 Difference]: Start difference. First operand has 420 places, 492 transitions, 8462 flow. Second operand 17 states and 1088 transitions. [2023-08-26 19:49:16,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 536 transitions, 9974 flow [2023-08-26 19:49:16,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 536 transitions, 9607 flow, removed 119 selfloop flow, removed 25 redundant places. [2023-08-26 19:49:16,619 INFO L231 Difference]: Finished difference. Result has 415 places, 501 transitions, 8456 flow [2023-08-26 19:49:16,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=8103, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8456, PETRI_PLACES=415, PETRI_TRANSITIONS=501} [2023-08-26 19:49:16,620 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 387 predicate places. [2023-08-26 19:49:16,620 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 501 transitions, 8456 flow [2023-08-26 19:49:16,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.85) internal successors, (1217), 20 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:49:16,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:49:16,621 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:49:16,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-26 19:49:16,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:49:16,825 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:49:16,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:49:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1004288369, now seen corresponding path program 9 times [2023-08-26 19:49:16,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:49:16,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821397386] [2023-08-26 19:49:16,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:49:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:49:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:49:17,046 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 19:49:17,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:49:17,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821397386] [2023-08-26 19:49:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821397386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:49:17,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35403129] [2023-08-26 19:49:17,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:49:17,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:49:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:49:17,048 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:49:17,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-26 19:49:17,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 19:49:17,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:49:17,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-26 19:49:17,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:49:17,344 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 19:49:17,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:49:29,976 WARN L234 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 40 DAG size of output: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:49:42,458 WARN L861 $PredicateComparison]: unable to prove that (or (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse2 (+ (* 2863311531 v_z_400) (* v_y_400 4294967296))) (.cse0 (+ (mod c_~x_1~0 4294967296) v_z_400)) (.cse1 (mod c_~x_2~0 4294967296))) (or (= .cse0 (+ .cse1 4294967296)) (< 0 .cse2) (< .cse2 0) (<= 4294967296 v_z_400) (= .cse0 .cse1) (< v_z_400 0)))) (< (mod (+ 3 c_thread1Thread1of1ForFork0_~i~0) 4294967296) (+ (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) 1))) is different from true [2023-08-26 19:49:51,226 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse2 (+ (* 2863311531 v_z_400) (* v_y_400 4294967296))) (.cse0 (+ (mod c_~x_1~0 4294967296) v_z_400)) (.cse1 (mod c_~x_2~0 4294967296))) (or (= .cse0 (+ .cse1 4294967296)) (< 0 .cse2) (< .cse2 0) (<= 4294967296 v_z_400) (= .cse0 .cse1) (< v_z_400 0)))) is different from false [2023-08-26 19:49:53,286 WARN L861 $PredicateComparison]: unable to prove that (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse2 (+ (* 2863311531 v_z_400) (* v_y_400 4294967296))) (.cse0 (+ (mod c_~x_1~0 4294967296) v_z_400)) (.cse1 (mod c_~x_2~0 4294967296))) (or (= .cse0 (+ .cse1 4294967296)) (< 0 .cse2) (< .cse2 0) (<= 4294967296 v_z_400) (= .cse0 .cse1) (< v_z_400 0)))) is different from true [2023-08-26 19:50:03,934 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse0 (+ (* 2863311531 v_z_400) (* v_y_400 4294967296)))) (or (< 0 .cse0) (< .cse0 0) (<= 4294967296 v_z_400) (= (+ (mod c_~x_1~0 4294967296) v_z_400) (mod c_~x_2~0 4294967296)) (< v_z_400 0)))) is different from false [2023-08-26 19:50:10,075 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 19:50:10,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35403129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:50:10,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:50:10,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 22 [2023-08-26 19:50:10,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843850465] [2023-08-26 19:50:10,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:50:10,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 19:50:10,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:50:10,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 19:50:10,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=307, Unknown=6, NotChecked=120, Total=552 [2023-08-26 19:50:10,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:50:10,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 501 transitions, 8456 flow. Second operand has 24 states, 24 states have (on average 60.791666666666664) internal successors, (1459), 24 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:50:10,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:50:10,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:50:10,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:50:12,128 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse0 (+ (* 2863311531 v_z_400) (* v_y_400 4294967296)))) (or (< 0 .cse0) (< .cse0 0) (<= 4294967296 v_z_400) (= (+ (mod c_~x_1~0 4294967296) v_z_400) (mod c_~x_2~0 4294967296)) (< v_z_400 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:50:14,180 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse2 (+ (* 2863311531 v_z_400) (* v_y_400 4294967296))) (.cse0 (+ (mod c_~x_1~0 4294967296) v_z_400)) (.cse1 (mod c_~x_2~0 4294967296))) (or (= .cse0 (+ .cse1 4294967296)) (< 0 .cse2) (< .cse2 0) (<= 4294967296 v_z_400) (= .cse0 .cse1) (< v_z_400 0)))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:50:16,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:50:18,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:50:20,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:50:22,300 WARN L839 $PredicateComparison]: unable to prove that (and (or (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse2 (+ (* 2863311531 v_z_400) (* v_y_400 4294967296))) (.cse0 (+ (mod c_~x_1~0 4294967296) v_z_400)) (.cse1 (mod c_~x_2~0 4294967296))) (or (= .cse0 (+ .cse1 4294967296)) (< 0 .cse2) (< .cse2 0) (<= 4294967296 v_z_400) (= .cse0 .cse1) (< v_z_400 0)))) (< (mod (+ 3 c_thread1Thread1of1ForFork0_~i~0) 4294967296) (+ (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) 1))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:50:24,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:50:26,424 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (or (< (mod (+ 3 c_thread1Thread1of1ForFork0_~i~0) 4294967296) (+ (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) 1)) (forall ((v_z_400 Int) (v_y_400 Int)) (let ((.cse0 (+ (mod c_~x_1~0 4294967296) v_z_400)) (.cse1 (mod c_~x_2~0 4294967296)) (.cse2 (+ (* 2863311531 v_z_400) (* v_y_400 4294967296)))) (or (= .cse0 (+ .cse1 4294967296)) (< .cse2 0) (<= 4294967296 v_z_400) (= .cse0 .cse1) (< (mod c_thread2Thread1of1ForFork1_~i~1 4294967296) .cse2) (< v_z_400 0))))) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:50:28,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:50:29,955 INFO L124 PetriNetUnfolderBase]: 1291/2500 cut-off events. [2023-08-26 19:50:29,955 INFO L125 PetriNetUnfolderBase]: For 116557/116557 co-relation queries the response was YES. [2023-08-26 19:50:29,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26643 conditions, 2500 events. 1291/2500 cut-off events. For 116557/116557 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 16863 event pairs, 241 based on Foata normal form. 6/2504 useless extension candidates. Maximal degree in co-relation 26508. Up to 2048 conditions per place. [2023-08-26 19:50:29,984 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 459 selfloop transitions, 116 changer transitions 13/588 dead transitions. [2023-08-26 19:50:29,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 588 transitions, 11742 flow [2023-08-26 19:50:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 19:50:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 19:50:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1459 transitions. [2023-08-26 19:50:29,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844532279314888 [2023-08-26 19:50:29,986 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1459 transitions. [2023-08-26 19:50:29,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1459 transitions. [2023-08-26 19:50:29,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:50:29,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1459 transitions. [2023-08-26 19:50:29,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 63.43478260869565) internal successors, (1459), 23 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:50:29,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:50:29,990 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 165.0) internal successors, (3960), 24 states have internal predecessors, (3960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:50:29,990 INFO L175 Difference]: Start difference. First operand has 415 places, 501 transitions, 8456 flow. Second operand 23 states and 1459 transitions. [2023-08-26 19:50:29,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 588 transitions, 11742 flow [2023-08-26 19:50:30,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 588 transitions, 11560 flow, removed 59 selfloop flow, removed 11 redundant places. [2023-08-26 19:50:30,626 INFO L231 Difference]: Finished difference. Result has 434 places, 543 transitions, 10215 flow [2023-08-26 19:50:30,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=8300, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10215, PETRI_PLACES=434, PETRI_TRANSITIONS=543} [2023-08-26 19:50:30,626 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 406 predicate places. [2023-08-26 19:50:30,627 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 543 transitions, 10215 flow [2023-08-26 19:50:30,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 60.791666666666664) internal successors, (1459), 24 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:50:30,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:50:30,627 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:50:30,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-26 19:50:30,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-26 19:50:30,831 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:50:30,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:50:30,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1495932121, now seen corresponding path program 5 times [2023-08-26 19:50:30,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:50:30,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533355816] [2023-08-26 19:50:30,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:50:30,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:50:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:50:31,176 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 19:50:31,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:50:31,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533355816] [2023-08-26 19:50:31,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533355816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:50:31,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943070501] [2023-08-26 19:50:31,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:50:31,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:50:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:50:31,181 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:50:31,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-26 19:50:31,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 19:50:31,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:50:31,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 19:50:31,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:50:31,463 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 19:50:31,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:50:41,963 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification. DAG size of input: 36 DAG size of output: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:50:44,005 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_404 Int) (v_z_404 Int)) (let ((.cse0 (+ (* v_y_404 4294967296) (* 2863311531 v_z_404))) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_404)) (.cse2 (mod c_~x_1~0 4294967296))) (or (<= 4294967296 v_z_404) (< .cse0 0) (< v_z_404 0) (= .cse1 .cse2) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse0) (= .cse1 (+ .cse2 4294967296))))) is different from false [2023-08-26 19:50:48,111 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_404 Int) (v_z_404 Int)) (let ((.cse0 (+ (* v_y_404 4294967296) (* 2863311531 v_z_404))) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_404)) (.cse2 (mod c_~x_1~0 4294967296))) (or (< 0 .cse0) (<= 4294967296 v_z_404) (< .cse0 0) (< v_z_404 0) (= .cse1 .cse2) (= .cse1 (+ .cse2 4294967296))))) is different from false [2023-08-26 19:50:52,536 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_y_404 Int) (v_z_404 Int)) (let ((.cse0 (+ (* v_y_404 4294967296) (* 2863311531 v_z_404)))) (or (< 0 .cse0) (<= 4294967296 v_z_404) (< .cse0 0) (< v_z_404 0) (= (+ (mod c_~x_2~0 4294967296) v_z_404) (mod c_~x_1~0 4294967296))))) is different from false [2023-08-26 19:50:52,630 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 19:50:52,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943070501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:50:52,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:50:52,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 8] total 17 [2023-08-26 19:50:52,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314103177] [2023-08-26 19:50:52,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:50:52,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 19:50:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:50:52,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 19:50:52,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=172, Unknown=5, NotChecked=90, Total=342 [2023-08-26 19:50:52,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 165 [2023-08-26 19:50:52,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 543 transitions, 10215 flow. Second operand has 19 states, 19 states have (on average 63.1578947368421) internal successors, (1200), 19 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:50:52,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:50:52,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 165 [2023-08-26 19:50:52,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:50:54,678 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (forall ((v_y_404 Int) (v_z_404 Int)) (let ((.cse0 (+ (* v_y_404 4294967296) (* 2863311531 v_z_404)))) (or (< 0 .cse0) (<= 4294967296 v_z_404) (< .cse0 0) (< v_z_404 0) (= (+ (mod c_~x_2~0 4294967296) v_z_404) (mod c_~x_1~0 4294967296))))) (= c_~x_1~0 0)) is different from false [2023-08-26 19:50:56,700 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_y_404 Int) (v_z_404 Int)) (let ((.cse0 (+ (* v_y_404 4294967296) (* 2863311531 v_z_404))) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_404)) (.cse2 (mod c_~x_1~0 4294967296))) (or (< 0 .cse0) (<= 4294967296 v_z_404) (< .cse0 0) (< v_z_404 0) (= .cse1 .cse2) (= .cse1 (+ .cse2 4294967296))))) (= c_~x_2~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:50:58,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:51:00,745 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 [1] [2023-08-26 19:51:02,788 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_y_404 Int) (v_z_404 Int)) (let ((.cse0 (+ (* v_y_404 4294967296) (* 2863311531 v_z_404))) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_404)) (.cse2 (mod c_~x_1~0 4294967296))) (or (<= 4294967296 v_z_404) (< .cse0 0) (< v_z_404 0) (= .cse1 .cse2) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse0) (= .cse1 (+ .cse2 4294967296))))) (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_~x_1~0 0)) is different from false [2023-08-26 19:51:04,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:51:06,846 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 [1] [2023-08-26 19:51:08,922 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~x_2~0 0) (= c_thread1Thread1of1ForFork0_~i~0 0) (= c_thread2Thread1of1ForFork1_~i~1 0) (= c_~x_1~0 0) (or (forall ((v_y_404 Int) (v_z_404 Int)) (let ((.cse0 (+ (* v_y_404 4294967296) (* 2863311531 v_z_404))) (.cse1 (+ (mod c_~x_2~0 4294967296) v_z_404)) (.cse2 (mod c_~x_1~0 4294967296))) (or (<= 4294967296 v_z_404) (< .cse0 0) (< v_z_404 0) (= .cse1 .cse2) (< (mod c_thread1Thread1of1ForFork0_~i~0 4294967296) .cse0) (= .cse1 (+ .cse2 4294967296))))) (< 4294967294 (mod c_thread2Thread1of1ForFork1_~i~1 4294967296)))) is different from false [2023-08-26 19:51:10,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:51:12,385 INFO L124 PetriNetUnfolderBase]: 1297/2491 cut-off events. [2023-08-26 19:51:12,385 INFO L125 PetriNetUnfolderBase]: For 121330/121330 co-relation queries the response was YES. [2023-08-26 19:51:12,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27796 conditions, 2491 events. 1297/2491 cut-off events. For 121330/121330 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 16656 event pairs, 421 based on Foata normal form. 2/2491 useless extension candidates. Maximal degree in co-relation 27652. Up to 2379 conditions per place. [2023-08-26 19:51:12,419 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 552 selfloop transitions, 38 changer transitions 3/593 dead transitions. [2023-08-26 19:51:12,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 593 transitions, 12361 flow [2023-08-26 19:51:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 19:51:12,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 19:51:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 991 transitions. [2023-08-26 19:51:12,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40040404040404043 [2023-08-26 19:51:12,421 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 991 transitions. [2023-08-26 19:51:12,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 991 transitions. [2023-08-26 19:51:12,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:12,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 991 transitions. [2023-08-26 19:51:12,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 66.06666666666666) internal successors, (991), 15 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:12,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 165.0) internal successors, (2640), 16 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:12,423 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 165.0) internal successors, (2640), 16 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:12,423 INFO L175 Difference]: Start difference. First operand has 434 places, 543 transitions, 10215 flow. Second operand 15 states and 991 transitions. [2023-08-26 19:51:12,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 593 transitions, 12361 flow [2023-08-26 19:51:13,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 593 transitions, 11375 flow, removed 465 selfloop flow, removed 8 redundant places. [2023-08-26 19:51:13,174 INFO L231 Difference]: Finished difference. Result has 447 places, 564 transitions, 9905 flow [2023-08-26 19:51:13,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=9239, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9905, PETRI_PLACES=447, PETRI_TRANSITIONS=564} [2023-08-26 19:51:13,175 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 419 predicate places. [2023-08-26 19:51:13,175 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 564 transitions, 9905 flow [2023-08-26 19:51:13,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.1578947368421) internal successors, (1200), 19 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:13,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:13,175 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:13,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-26 19:51:13,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-26 19:51:13,376 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:13,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1198768799, now seen corresponding path program 26 times [2023-08-26 19:51:13,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:13,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284310747] [2023-08-26 19:51:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:13,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:14,203 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:14,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:14,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284310747] [2023-08-26 19:51:14,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284310747] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:14,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872868741] [2023-08-26 19:51:14,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:51:14,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:14,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:14,205 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:51:14,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-26 19:51:14,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:51:14,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:14,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-26 19:51:14,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:51:14,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:18,168 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ 2 c_thread2Thread1of1ForFork1_~i~1) 4294967296)) (.cse0 (mod (+ c_thread1Thread1of1ForFork0_~i~0 1) 4294967296)) (.cse3 (* 4294967296 (div c_~x_1~0 4294967296))) (.cse5 (mod (+ c_thread2Thread1of1ForFork1_~i~1 1) 4294967296)) (.cse1 (mod c_thread1Thread1of1ForFork0_~i~0 4294967296))) (and (forall ((v_z_416 Int)) (let ((.cse4 (* 2 v_z_416))) (let ((.cse6 (* (div (+ c_~x_2~0 .cse4) 4294967296) 4294967296))) (or (< .cse0 v_z_416) (<= v_z_416 .cse1) (< (+ c_~x_2~0 (* (div .cse2 4294967296) 4294967296) 4294967294 .cse3 .cse4) (+ .cse5 c_~x_1~0 .cse6)) (< (+ (* 4294967296 (div (+ (- 1) (* (- 1) c_~x_2~0) c_~x_1~0 .cse2 (* (- 2) v_z_416)) 4294967296)) 4294967294 .cse6) (+ .cse5 .cse3)))))) (forall ((v_z_416 Int)) (or (< .cse0 v_z_416) (let ((.cse7 (* 2 v_z_416))) (< (+ c_~x_1~0 (* (div (+ c_~x_2~0 .cse7) 4294967296) 4294967296) .cse2) (+ (* (div (+ .cse5 (- 4294967295)) 4294967296) 4294967296) c_~x_2~0 8589934593 .cse3 .cse7))) (<= v_z_416 .cse1))) (forall ((v_z_416 Int)) (or (< .cse0 v_z_416) (let ((.cse8 (* 2 v_z_416))) (< (+ c_~x_2~0 .cse3 .cse8) (+ .cse5 c_~x_1~0 2 (* (div (+ c_~x_2~0 .cse8) 4294967296) 4294967296)))) (<= v_z_416 .cse1))))) is different from false [2023-08-26 19:51:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-26 19:51:18,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872868741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:51:18,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:51:18,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-26 19:51:18,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781159082] [2023-08-26 19:51:18,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:51:18,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 19:51:18,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:51:18,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 19:51:18,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=273, Unknown=1, NotChecked=34, Total=380 [2023-08-26 19:51:18,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 165 [2023-08-26 19:51:18,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 564 transitions, 9905 flow. Second operand has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:18,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:51:18,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 165 [2023-08-26 19:51:18,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:51:21,956 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 19:51:23,660 INFO L124 PetriNetUnfolderBase]: 1319/2537 cut-off events. [2023-08-26 19:51:23,661 INFO L125 PetriNetUnfolderBase]: For 111706/111706 co-relation queries the response was YES. [2023-08-26 19:51:23,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26648 conditions, 2537 events. 1319/2537 cut-off events. For 111706/111706 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17088 event pairs, 279 based on Foata normal form. 2/2537 useless extension candidates. Maximal degree in co-relation 26497. Up to 2402 conditions per place. [2023-08-26 19:51:23,694 INFO L140 encePairwiseOnDemand]: 156/165 looper letters, 530 selfloop transitions, 69 changer transitions 10/609 dead transitions. [2023-08-26 19:51:23,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 609 transitions, 11676 flow [2023-08-26 19:51:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 19:51:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 19:51:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1215 transitions. [2023-08-26 19:51:23,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875598086124402 [2023-08-26 19:51:23,702 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1215 transitions. [2023-08-26 19:51:23,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1215 transitions. [2023-08-26 19:51:23,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:51:23,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1215 transitions. [2023-08-26 19:51:23,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 63.94736842105263) internal successors, (1215), 19 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,704 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 165.0) internal successors, (3300), 20 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:23,704 INFO L175 Difference]: Start difference. First operand has 447 places, 564 transitions, 9905 flow. Second operand 19 states and 1215 transitions. [2023-08-26 19:51:23,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 609 transitions, 11676 flow [2023-08-26 19:51:24,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 609 transitions, 11525 flow, removed 64 selfloop flow, removed 2 redundant places. [2023-08-26 19:51:24,432 INFO L231 Difference]: Finished difference. Result has 469 places, 572 transitions, 10167 flow [2023-08-26 19:51:24,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=9754, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=10167, PETRI_PLACES=469, PETRI_TRANSITIONS=572} [2023-08-26 19:51:24,433 INFO L281 CegarLoopForPetriNet]: 28 programPoint places, 441 predicate places. [2023-08-26 19:51:24,433 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 572 transitions, 10167 flow [2023-08-26 19:51:24,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:51:24,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:51:24,434 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:24,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-26 19:51:24,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-26 19:51:24,634 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 19:51:24,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:51:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2085626343, now seen corresponding path program 6 times [2023-08-26 19:51:24,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:51:24,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98686410] [2023-08-26 19:51:24,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:51:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:51:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:51:24,875 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 19:51:24,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:51:24,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98686410] [2023-08-26 19:51:24,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98686410] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:51:24,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984362974] [2023-08-26 19:51:24,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 19:51:24,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:51:24,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:51:24,876 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:51:24,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-26 19:51:24,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-26 19:51:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:51:24,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 19:51:24,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:51:25,911 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 19:51:25,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:51:37,147 WARN L234 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 36 DAG size of output: 29 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-08-26 19:51:43,840 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 19:51:43,846 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 19:51:44,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-26 19:51:45,043 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 19:51:45,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-26 19:51:45,044 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 11 remaining) [2023-08-26 19:51:45,045 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 19:51:45,046 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 19:51:45,046 INFO L445 BasicCegarLoop]: Path program histogram: [26, 9, 6, 1, 1, 1, 1, 1, 1] [2023-08-26 19:51:45,048 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 19:51:45,049 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 19:51:45,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 07:51:45 BasicIcfg [2023-08-26 19:51:45,051 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 19:51:45,051 INFO L158 Benchmark]: Toolchain (without parser) took 847556.47ms. Allocated memory was 367.0MB in the beginning and 595.6MB in the end (delta: 228.6MB). Free memory was 322.4MB in the beginning and 365.2MB in the end (delta: -42.8MB). Peak memory consumption was 187.7MB. Max. memory is 16.0GB. [2023-08-26 19:51:45,051 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 19:51:45,056 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 367.0MB. Free memory is still 343.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 19:51:45,058 INFO L158 Benchmark]: CACSL2BoogieTranslator took 248.65ms. Allocated memory is still 367.0MB. Free memory was 322.2MB in the beginning and 311.5MB in the end (delta: 10.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 19:51:45,059 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.80ms. Allocated memory is still 367.0MB. Free memory was 311.5MB in the beginning and 310.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 19:51:45,059 INFO L158 Benchmark]: Boogie Preprocessor took 37.32ms. Allocated memory is still 367.0MB. Free memory was 310.0MB in the beginning and 308.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 19:51:45,059 INFO L158 Benchmark]: RCFGBuilder took 419.54ms. Allocated memory is still 367.0MB. Free memory was 308.6MB in the beginning and 336.4MB in the end (delta: -27.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.0GB. [2023-08-26 19:51:45,059 INFO L158 Benchmark]: TraceAbstraction took 846803.90ms. Allocated memory was 367.0MB in the beginning and 595.6MB in the end (delta: 228.6MB). Free memory was 335.8MB in the beginning and 365.2MB in the end (delta: -29.4MB). Peak memory consumption was 197.7MB. Max. memory is 16.0GB. [2023-08-26 19:51:45,063 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 367.0MB. Free memory is still 343.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 248.65ms. Allocated memory is still 367.0MB. Free memory was 322.2MB in the beginning and 311.5MB in the end (delta: 10.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.80ms. Allocated memory is still 367.0MB. Free memory was 311.5MB in the beginning and 310.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 37.32ms. Allocated memory is still 367.0MB. Free memory was 310.0MB in the beginning and 308.8MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 419.54ms. Allocated memory is still 367.0MB. Free memory was 308.6MB in the beginning and 336.4MB in the end (delta: -27.8MB). Peak memory consumption was 8.9MB. Max. memory is 16.0GB. * TraceAbstraction took 846803.90ms. Allocated memory was 367.0MB in the beginning and 595.6MB in the end (delta: 228.6MB). Free memory was 335.8MB in the beginning and 365.2MB in the end (delta: -29.4MB). Peak memory consumption was 197.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 79 PlacesBefore, 28 PlacesAfterwards, 77 TransitionsBefore, 23 TransitionsAfterwards, 748 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 77 TotalNumberOfCompositions, 715 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 715, independent: 715, independent conditional: 0, independent unconditional: 715, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 374, independent: 374, independent conditional: 0, independent unconditional: 374, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 715, independent: 341, independent conditional: 0, independent unconditional: 341, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 374, unknown conditional: 0, unknown unconditional: 374] , Statistics on independence cache: Total cache size (in pairs): 27, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, 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 CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - TimeoutResultAtElement [Line: 64]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 106 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: 846.7s, OverallIterations: 47, TraceHistogramMax: 3, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 466.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 131 mSolverCounterUnknown, 2161 SdHoareTripleChecker+Valid, 322.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2161 mSDsluCounter, 671 SdHoareTripleChecker+Invalid, 318.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2601 IncrementalHoareTripleChecker+Unchecked, 528 mSDsCounter, 655 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16505 IncrementalHoareTripleChecker+Invalid, 19892 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 655 mSolverCounterUnsat, 143 mSDtfsCounter, 16505 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1717 GetRequests, 689 SyntacticMatches, 89 SemanticMatches, 939 ConstructedPredicates, 31 IntricatePredicates, 0 DeprecatedPredicates, 7251 ImplicationChecksByTransitivity, 282.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10215occurred in iteration=44, InterpolantAutomatonStates: 795, 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: 0.3s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 344.4s InterpolantComputationTime, 1248 NumberOfCodeBlocks, 1248 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 1731 ConstructedInterpolants, 61 QuantifiedInterpolants, 48197 SizeOfPredicates, 152 NumberOfNonLiveVariables, 5165 ConjunctsInSsa, 958 ConjunctsInUnsatCore, 126 InterpolantComputations, 6 PerfectInterpolantSequences, 3/354 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