/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:30:05,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:30:05,758 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 15:30:05,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:30:05,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:30:05,786 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:30:05,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:30:05,787 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:30:05,788 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:30:05,790 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:30:05,790 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:30:05,791 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:30:05,791 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:30:05,792 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:30:05,792 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:30:05,792 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:30:05,792 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:30:05,792 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:30:05,792 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:30:05,792 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:30:05,793 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:30:05,793 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:30:05,793 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:30:05,794 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:30:05,794 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:30:05,794 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:30:05,794 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:30:05,794 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:05,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:30:05,795 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:30:05,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:30:05,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:30:05,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:30:05,796 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:30:05,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:30:05,796 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:30:06,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:30:06,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:30:06,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:30:06,053 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:30:06,053 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:30:06,054 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-08-26 15:30:07,002 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:30:07,210 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:30:07,210 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_05-funloop_hard2.i [2023-08-26 15:30:07,220 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49a7a1fdc/cdb65ce576f54006a37d1f5233adae2d/FLAG20e6326da [2023-08-26 15:30:07,229 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49a7a1fdc/cdb65ce576f54006a37d1f5233adae2d [2023-08-26 15:30:07,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:30:07,231 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:30:07,232 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:07,232 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:30:07,234 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:30:07,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,235 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b340dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07, skipping insertion in model container [2023-08-26 15:30:07,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,266 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:30:07,569 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:07,588 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:30:07,610 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:30:07,611 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:30:07,615 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-26 15:30:07,630 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:07,668 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:30:07,668 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07 WrapperNode [2023-08-26 15:30:07,668 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:07,669 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:07,669 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:30:07,669 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:30:07,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,684 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,700 INFO L138 Inliner]: procedures = 262, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2023-08-26 15:30:07,700 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:07,701 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:30:07,701 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:30:07,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:30:07,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,709 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,709 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,713 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,716 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,718 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:30:07,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:30:07,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:30:07,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:30:07,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (1/1) ... [2023-08-26 15:30:07,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:07,743 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 15:30:07,749 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 15:30:07,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:30:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:30:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:30:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:30:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:30:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:30:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:30:07,777 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:30:07,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:30:07,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:30:07,779 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 15:30:07,900 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:30:07,904 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:30:08,103 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:30:08,107 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:30:08,108 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 15:30:08,110 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:08 BoogieIcfgContainer [2023-08-26 15:30:08,110 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:30:08,111 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:30:08,112 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:30:08,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:30:08,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:30:07" (1/3) ... [2023-08-26 15:30:08,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22775f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:08, skipping insertion in model container [2023-08-26 15:30:08,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:07" (2/3) ... [2023-08-26 15:30:08,115 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22775f5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:08, skipping insertion in model container [2023-08-26 15:30:08,115 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:08" (3/3) ... [2023-08-26 15:30:08,116 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_05-funloop_hard2.i [2023-08-26 15:30:08,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:30:08,128 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 15:30:08,128 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:30:08,220 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:30:08,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 95 transitions, 195 flow [2023-08-26 15:30:08,296 INFO L124 PetriNetUnfolderBase]: 6/94 cut-off events. [2023-08-26 15:30:08,296 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:08,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 6/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 200 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-08-26 15:30:08,300 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 95 transitions, 195 flow [2023-08-26 15:30:08,304 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 94 transitions, 191 flow [2023-08-26 15:30:08,308 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:30:08,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 94 transitions, 191 flow [2023-08-26 15:30:08,320 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 94 transitions, 191 flow [2023-08-26 15:30:08,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 94 transitions, 191 flow [2023-08-26 15:30:08,344 INFO L124 PetriNetUnfolderBase]: 6/94 cut-off events. [2023-08-26 15:30:08,344 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:08,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 94 events. 6/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 200 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2023-08-26 15:30:08,347 INFO L119 LiptonReduction]: Number of co-enabled transitions 2268 [2023-08-26 15:30:10,063 INFO L134 LiptonReduction]: Checked pairs total: 3244 [2023-08-26 15:30:10,064 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-26 15:30:10,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:30:10,076 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;@3e06c37f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:30:10,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-26 15:30:10,094 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:30:10,094 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-26 15:30:10,094 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:10,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:10,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 15:30:10,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:10,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:10,098 INFO L85 PathProgramCache]: Analyzing trace with hash 11593, now seen corresponding path program 1 times [2023-08-26 15:30:10,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:10,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163870061] [2023-08-26 15:30:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:10,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:10,218 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 15:30:10,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:10,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163870061] [2023-08-26 15:30:10,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163870061] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:10,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:10,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:30:10,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325703542] [2023-08-26 15:30:10,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:10,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:30:10,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:10,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:30:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:30:10,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 188 [2023-08-26 15:30:10,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 71 flow. Second operand has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:10,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 188 [2023-08-26 15:30:10,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:10,309 INFO L124 PetriNetUnfolderBase]: 114/238 cut-off events. [2023-08-26 15:30:10,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:10,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 238 events. 114/238 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 992 event pairs, 91 based on Foata normal form. 0/155 useless extension candidates. Maximal degree in co-relation 458. Up to 229 conditions per place. [2023-08-26 15:30:10,311 INFO L140 encePairwiseOnDemand]: 181/188 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-08-26 15:30:10,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 109 flow [2023-08-26 15:30:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:30:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:30:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 215 transitions. [2023-08-26 15:30:10,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718085106382979 [2023-08-26 15:30:10,319 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 215 transitions. [2023-08-26 15:30:10,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 215 transitions. [2023-08-26 15:30:10,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:10,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 215 transitions. [2023-08-26 15:30:10,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 107.5) internal successors, (215), 2 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,326 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,327 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 71 flow. Second operand 2 states and 215 transitions. [2023-08-26 15:30:10,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 109 flow [2023-08-26 15:30:10,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:10,329 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 56 flow [2023-08-26 15:30:10,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-26 15:30:10,333 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -7 predicate places. [2023-08-26 15:30:10,333 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 56 flow [2023-08-26 15:30:10,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 92.0) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:10,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 15:30:10,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:30:10,333 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:10,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:10,334 INFO L85 PathProgramCache]: Analyzing trace with hash 345554638, now seen corresponding path program 1 times [2023-08-26 15:30:10,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:10,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658163325] [2023-08-26 15:30:10,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:10,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:10,388 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 15:30:10,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:10,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658163325] [2023-08-26 15:30:10,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658163325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:10,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:10,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:30:10,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749547729] [2023-08-26 15:30:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:10,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:30:10,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:10,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:30:10,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:30:10,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 188 [2023-08-26 15:30:10,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:10,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 188 [2023-08-26 15:30:10,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:10,460 INFO L124 PetriNetUnfolderBase]: 114/239 cut-off events. [2023-08-26 15:30:10,460 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:10,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 239 events. 114/239 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 989 event pairs, 91 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 470. Up to 229 conditions per place. [2023-08-26 15:30:10,463 INFO L140 encePairwiseOnDemand]: 185/188 looper letters, 25 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-08-26 15:30:10,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 28 transitions, 112 flow [2023-08-26 15:30:10,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2023-08-26 15:30:10,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49113475177304966 [2023-08-26 15:30:10,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 277 transitions. [2023-08-26 15:30:10,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 277 transitions. [2023-08-26 15:30:10,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:10,469 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 277 transitions. [2023-08-26 15:30:10,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.33333333333333) internal successors, (277), 3 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,473 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 56 flow. Second operand 3 states and 277 transitions. [2023-08-26 15:30:10,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 28 transitions, 112 flow [2023-08-26 15:30:10,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:30:10,474 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 68 flow [2023-08-26 15:30:10,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2023-08-26 15:30:10,475 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -4 predicate places. [2023-08-26 15:30:10,475 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 68 flow [2023-08-26 15:30:10,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:10,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 15:30:10,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:30:10,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:10,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:10,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2110137498, now seen corresponding path program 1 times [2023-08-26 15:30:10,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:10,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121129066] [2023-08-26 15:30:10,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:10,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:10,523 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 15:30:10,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:10,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121129066] [2023-08-26 15:30:10,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121129066] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:10,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854774108] [2023-08-26 15:30:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:10,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:10,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:10,526 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 15:30:10,530 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 15:30:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:10,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 15:30:10,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:10,604 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 15:30:10,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:10,618 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 15:30:10,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854774108] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:10,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:10,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-26 15:30:10,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279807381] [2023-08-26 15:30:10,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:10,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:30:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:10,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:30:10,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:30:10,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 188 [2023-08-26 15:30:10,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 68 flow. Second operand has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:10,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 188 [2023-08-26 15:30:10,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:10,688 INFO L124 PetriNetUnfolderBase]: 114/242 cut-off events. [2023-08-26 15:30:10,688 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:10,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 242 events. 114/242 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 989 event pairs, 91 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 484. Up to 229 conditions per place. [2023-08-26 15:30:10,690 INFO L140 encePairwiseOnDemand]: 185/188 looper letters, 25 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2023-08-26 15:30:10,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 140 flow [2023-08-26 15:30:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:30:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:30:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 531 transitions. [2023-08-26 15:30:10,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47074468085106386 [2023-08-26 15:30:10,692 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 531 transitions. [2023-08-26 15:30:10,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 531 transitions. [2023-08-26 15:30:10,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:10,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 531 transitions. [2023-08-26 15:30:10,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 88.5) internal successors, (531), 6 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,695 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,695 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 68 flow. Second operand 6 states and 531 transitions. [2023-08-26 15:30:10,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 140 flow [2023-08-26 15:30:10,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 136 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:10,696 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 100 flow [2023-08-26 15:30:10,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-08-26 15:30:10,697 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-26 15:30:10,697 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 100 flow [2023-08-26 15:30:10,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.5) internal successors, (507), 6 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:10,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:10,698 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-26 15:30:10,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 15:30:10,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:10,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:10,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:10,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1482042930, now seen corresponding path program 2 times [2023-08-26 15:30:10,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:10,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467267700] [2023-08-26 15:30:10,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:10,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:10,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:10,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467267700] [2023-08-26 15:30:10,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467267700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:10,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661528743] [2023-08-26 15:30:10,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:30:10,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:10,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:10,986 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 15:30:10,988 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 15:30:11,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 15:30:11,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:11,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 15:30:11,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:11,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:11,211 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 15:30:11,226 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661528743] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:11,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:11,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 15:30:11,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050068994] [2023-08-26 15:30:11,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:11,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:30:11,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:11,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:30:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 15:30:11,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 188 [2023-08-26 15:30:11,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:11,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 188 [2023-08-26 15:30:11,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:11,279 INFO L124 PetriNetUnfolderBase]: 110/224 cut-off events. [2023-08-26 15:30:11,279 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:30:11,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476 conditions, 224 events. 110/224 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 827 event pairs, 80 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 468. Up to 206 conditions per place. [2023-08-26 15:30:11,280 INFO L140 encePairwiseOnDemand]: 184/188 looper letters, 35 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2023-08-26 15:30:11,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 190 flow [2023-08-26 15:30:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-26 15:30:11,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39893617021276595 [2023-08-26 15:30:11,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-26 15:30:11,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-26 15:30:11,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:11,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-26 15:30:11,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,283 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 188.0) internal successors, (752), 4 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,283 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 100 flow. Second operand 3 states and 225 transitions. [2023-08-26 15:30:11,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 190 flow [2023-08-26 15:30:11,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 176 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:11,287 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 86 flow [2023-08-26 15:30:11,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-26 15:30:11,288 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 2 predicate places. [2023-08-26 15:30:11,288 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 86 flow [2023-08-26 15:30:11,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.5) internal successors, (258), 4 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:11,289 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-26 15:30:11,296 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 15:30:11,496 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,SelfDestructingSolverStorable3 [2023-08-26 15:30:11,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:11,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:11,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1482042929, now seen corresponding path program 1 times [2023-08-26 15:30:11,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:11,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496099325] [2023-08-26 15:30:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:11,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:11,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:11,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496099325] [2023-08-26 15:30:11,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496099325] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:11,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109103812] [2023-08-26 15:30:11,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:11,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:11,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:11,574 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 15:30:11,576 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 15:30:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:11,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 15:30:11,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:11,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:11,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109103812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:11,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:11,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-26 15:30:11,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516659540] [2023-08-26 15:30:11,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:11,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 15:30:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 15:30:11,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-26 15:30:11,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 188 [2023-08-26 15:30:11,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 86 flow. Second operand has 12 states, 12 states have (on average 84.25) internal successors, (1011), 12 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:11,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 188 [2023-08-26 15:30:11,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:11,763 INFO L124 PetriNetUnfolderBase]: 98/214 cut-off events. [2023-08-26 15:30:11,763 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-26 15:30:11,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 214 events. 98/214 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 781 event pairs, 77 based on Foata normal form. 6/160 useless extension candidates. Maximal degree in co-relation 454. Up to 197 conditions per place. [2023-08-26 15:30:11,764 INFO L140 encePairwiseOnDemand]: 185/188 looper letters, 23 selfloop transitions, 11 changer transitions 0/35 dead transitions. [2023-08-26 15:30:11,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 190 flow [2023-08-26 15:30:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:30:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:30:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1036 transitions. [2023-08-26 15:30:11,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4592198581560284 [2023-08-26 15:30:11,766 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1036 transitions. [2023-08-26 15:30:11,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1036 transitions. [2023-08-26 15:30:11,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:11,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1036 transitions. [2023-08-26 15:30:11,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 86.33333333333333) internal successors, (1036), 12 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 15:30:11,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 188.0) internal successors, (2444), 13 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,772 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 188.0) internal successors, (2444), 13 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,772 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 86 flow. Second operand 12 states and 1036 transitions. [2023-08-26 15:30:11,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 190 flow [2023-08-26 15:30:11,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 35 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:11,775 INFO L231 Difference]: Finished difference. Result has 52 places, 35 transitions, 166 flow [2023-08-26 15:30:11,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=166, PETRI_PLACES=52, PETRI_TRANSITIONS=35} [2023-08-26 15:30:11,776 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2023-08-26 15:30:11,776 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 35 transitions, 166 flow [2023-08-26 15:30:11,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 84.25) internal successors, (1011), 12 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:11,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:11,777 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-26 15:30:11,781 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 15:30:11,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:11,982 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:11,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:11,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1508598193, now seen corresponding path program 2 times [2023-08-26 15:30:11,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:11,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789755591] [2023-08-26 15:30:11,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:11,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:12,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:12,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789755591] [2023-08-26 15:30:12,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789755591] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:12,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:12,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:30:12,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084032594] [2023-08-26 15:30:12,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:12,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:30:12,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:12,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:30:12,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:30:12,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 188 [2023-08-26 15:30:12,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 35 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:12,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 188 [2023-08-26 15:30:12,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:12,288 INFO L124 PetriNetUnfolderBase]: 122/256 cut-off events. [2023-08-26 15:30:12,288 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 15:30:12,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 574 conditions, 256 events. 122/256 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 875 event pairs, 70 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 559. Up to 190 conditions per place. [2023-08-26 15:30:12,289 INFO L140 encePairwiseOnDemand]: 182/188 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-26 15:30:12,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 278 flow [2023-08-26 15:30:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:30:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:30:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 271 transitions. [2023-08-26 15:30:12,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3603723404255319 [2023-08-26 15:30:12,290 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 271 transitions. [2023-08-26 15:30:12,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 271 transitions. [2023-08-26 15:30:12,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:12,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 271 transitions. [2023-08-26 15:30:12,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.75) internal successors, (271), 4 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,292 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,292 INFO L175 Difference]: Start difference. First operand has 52 places, 35 transitions, 166 flow. Second operand 4 states and 271 transitions. [2023-08-26 15:30:12,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 278 flow [2023-08-26 15:30:12,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 46 transitions, 230 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 15:30:12,294 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 132 flow [2023-08-26 15:30:12,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=132, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-26 15:30:12,295 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2023-08-26 15:30:12,295 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 132 flow [2023-08-26 15:30:12,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.2) internal successors, (296), 5 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:12,295 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-26 15:30:12,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:30:12,295 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:12,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1508597951, now seen corresponding path program 1 times [2023-08-26 15:30:12,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:12,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051303118] [2023-08-26 15:30:12,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:12,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:12,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:12,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051303118] [2023-08-26 15:30:12,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051303118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:12,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:12,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:30:12,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350859343] [2023-08-26 15:30:12,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:12,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:30:12,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:12,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:30:12,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:30:12,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 188 [2023-08-26 15:30:12,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:12,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 188 [2023-08-26 15:30:12,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:12,502 INFO L124 PetriNetUnfolderBase]: 197/430 cut-off events. [2023-08-26 15:30:12,502 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2023-08-26 15:30:12,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954 conditions, 430 events. 197/430 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1901 event pairs, 98 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 938. Up to 254 conditions per place. [2023-08-26 15:30:12,504 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 48 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-26 15:30:12,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 52 transitions, 280 flow [2023-08-26 15:30:12,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:30:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:30:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 277 transitions. [2023-08-26 15:30:12,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683510638297872 [2023-08-26 15:30:12,505 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 277 transitions. [2023-08-26 15:30:12,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 277 transitions. [2023-08-26 15:30:12,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:12,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 277 transitions. [2023-08-26 15:30:12,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.25) internal successors, (277), 4 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,506 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,507 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 188.0) internal successors, (940), 5 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,507 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 132 flow. Second operand 4 states and 277 transitions. [2023-08-26 15:30:12,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 52 transitions, 280 flow [2023-08-26 15:30:12,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 274 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:12,508 INFO L231 Difference]: Finished difference. Result has 52 places, 36 transitions, 144 flow [2023-08-26 15:30:12,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=52, PETRI_TRANSITIONS=36} [2023-08-26 15:30:12,509 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 17 predicate places. [2023-08-26 15:30:12,509 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 36 transitions, 144 flow [2023-08-26 15:30:12,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.2) internal successors, (301), 5 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:12,509 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:12,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:30:12,509 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:12,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash 478104019, now seen corresponding path program 1 times [2023-08-26 15:30:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:12,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301132491] [2023-08-26 15:30:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:12,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:12,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:12,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301132491] [2023-08-26 15:30:12,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301132491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:12,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:12,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:30:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586611875] [2023-08-26 15:30:12,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:30:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:30:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:30:12,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 188 [2023-08-26 15:30:12,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 36 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:12,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 188 [2023-08-26 15:30:12,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:12,672 INFO L124 PetriNetUnfolderBase]: 168/355 cut-off events. [2023-08-26 15:30:12,672 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-26 15:30:12,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 903 conditions, 355 events. 168/355 cut-off events. For 129/129 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 1352 event pairs, 13 based on Foata normal form. 0/324 useless extension candidates. Maximal degree in co-relation 886. Up to 266 conditions per place. [2023-08-26 15:30:12,674 INFO L140 encePairwiseOnDemand]: 180/188 looper letters, 53 selfloop transitions, 8 changer transitions 2/63 dead transitions. [2023-08-26 15:30:12,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 63 transitions, 355 flow [2023-08-26 15:30:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:30:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:30:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2023-08-26 15:30:12,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574468085106383 [2023-08-26 15:30:12,675 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 336 transitions. [2023-08-26 15:30:12,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 336 transitions. [2023-08-26 15:30:12,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:12,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 336 transitions. [2023-08-26 15:30:12,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,677 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,677 INFO L175 Difference]: Start difference. First operand has 52 places, 36 transitions, 144 flow. Second operand 5 states and 336 transitions. [2023-08-26 15:30:12,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 63 transitions, 355 flow [2023-08-26 15:30:12,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 63 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:12,679 INFO L231 Difference]: Finished difference. Result has 58 places, 42 transitions, 202 flow [2023-08-26 15:30:12,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=202, PETRI_PLACES=58, PETRI_TRANSITIONS=42} [2023-08-26 15:30:12,680 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 23 predicate places. [2023-08-26 15:30:12,680 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 42 transitions, 202 flow [2023-08-26 15:30:12,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:12,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:12,680 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:12,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:30:12,680 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:12,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:12,681 INFO L85 PathProgramCache]: Analyzing trace with hash 847655722, now seen corresponding path program 1 times [2023-08-26 15:30:12,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:12,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70041720] [2023-08-26 15:30:12,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:12,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:12,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:12,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70041720] [2023-08-26 15:30:12,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70041720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:12,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869805529] [2023-08-26 15:30:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:12,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:12,923 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 15:30:12,925 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 15:30:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:12,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 15:30:12,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:13,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:13,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:13,119 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:13,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:13,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:13,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869805529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:13,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:13,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-26 15:30:13,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506718687] [2023-08-26 15:30:13,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:13,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 15:30:13,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:13,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 15:30:13,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-26 15:30:13,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 188 [2023-08-26 15:30:13,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 42 transitions, 202 flow. Second operand has 15 states, 15 states have (on average 54.0) internal successors, (810), 15 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:13,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:13,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 188 [2023-08-26 15:30:13,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:13,503 INFO L124 PetriNetUnfolderBase]: 300/619 cut-off events. [2023-08-26 15:30:13,504 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2023-08-26 15:30:13,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1791 conditions, 619 events. 300/619 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2278 event pairs, 95 based on Foata normal form. 33/641 useless extension candidates. Maximal degree in co-relation 1771. Up to 265 conditions per place. [2023-08-26 15:30:13,507 INFO L140 encePairwiseOnDemand]: 182/188 looper letters, 94 selfloop transitions, 7 changer transitions 0/102 dead transitions. [2023-08-26 15:30:13,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 102 transitions, 650 flow [2023-08-26 15:30:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 15:30:13,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 15:30:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 496 transitions. [2023-08-26 15:30:13,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32978723404255317 [2023-08-26 15:30:13,508 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 496 transitions. [2023-08-26 15:30:13,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 496 transitions. [2023-08-26 15:30:13,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:13,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 496 transitions. [2023-08-26 15:30:13,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.0) internal successors, (496), 8 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:13,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 188.0) internal successors, (1692), 9 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:13,511 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 188.0) internal successors, (1692), 9 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:13,511 INFO L175 Difference]: Start difference. First operand has 58 places, 42 transitions, 202 flow. Second operand 8 states and 496 transitions. [2023-08-26 15:30:13,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 102 transitions, 650 flow [2023-08-26 15:30:13,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 102 transitions, 650 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:30:13,513 INFO L231 Difference]: Finished difference. Result has 69 places, 46 transitions, 254 flow [2023-08-26 15:30:13,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=254, PETRI_PLACES=69, PETRI_TRANSITIONS=46} [2023-08-26 15:30:13,514 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 34 predicate places. [2023-08-26 15:30:13,514 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 46 transitions, 254 flow [2023-08-26 15:30:13,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 54.0) internal successors, (810), 15 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:13,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:13,515 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:13,527 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 15:30:13,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:13,721 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:13,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:13,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1086297746, now seen corresponding path program 1 times [2023-08-26 15:30:13,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:13,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797688535] [2023-08-26 15:30:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:13,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:13,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797688535] [2023-08-26 15:30:13,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797688535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138148643] [2023-08-26 15:30:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:13,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:13,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:13,885 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 15:30:13,887 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 15:30:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:13,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 15:30:13,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:14,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:14,022 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:14,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:16,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:16,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138148643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:16,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:16,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-26 15:30:16,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147228136] [2023-08-26 15:30:16,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:16,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 15:30:16,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:16,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 15:30:16,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-26 15:30:16,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 188 [2023-08-26 15:30:16,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 46 transitions, 254 flow. Second operand has 15 states, 15 states have (on average 55.0) internal successors, (825), 15 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:16,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:16,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 188 [2023-08-26 15:30:16,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:16,626 INFO L124 PetriNetUnfolderBase]: 624/1282 cut-off events. [2023-08-26 15:30:16,626 INFO L125 PetriNetUnfolderBase]: For 1397/1397 co-relation queries the response was YES. [2023-08-26 15:30:16,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4160 conditions, 1282 events. 624/1282 cut-off events. For 1397/1397 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5905 event pairs, 150 based on Foata normal form. 168/1427 useless extension candidates. Maximal degree in co-relation 4135. Up to 400 conditions per place. [2023-08-26 15:30:16,633 INFO L140 encePairwiseOnDemand]: 182/188 looper letters, 152 selfloop transitions, 8 changer transitions 0/160 dead transitions. [2023-08-26 15:30:16,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 160 transitions, 1188 flow [2023-08-26 15:30:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 15:30:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 15:30:16,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 533 transitions. [2023-08-26 15:30:16,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35438829787234044 [2023-08-26 15:30:16,635 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 533 transitions. [2023-08-26 15:30:16,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 533 transitions. [2023-08-26 15:30:16,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:16,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 533 transitions. [2023-08-26 15:30:16,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.625) internal successors, (533), 8 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:16,637 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 188.0) internal successors, (1692), 9 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:16,638 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 188.0) internal successors, (1692), 9 states have internal predecessors, (1692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:16,638 INFO L175 Difference]: Start difference. First operand has 69 places, 46 transitions, 254 flow. Second operand 8 states and 533 transitions. [2023-08-26 15:30:16,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 160 transitions, 1188 flow [2023-08-26 15:30:16,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 160 transitions, 1139 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:16,642 INFO L231 Difference]: Finished difference. Result has 78 places, 50 transitions, 310 flow [2023-08-26 15:30:16,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=310, PETRI_PLACES=78, PETRI_TRANSITIONS=50} [2023-08-26 15:30:16,642 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 43 predicate places. [2023-08-26 15:30:16,642 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 50 transitions, 310 flow [2023-08-26 15:30:16,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.0) internal successors, (825), 15 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:16,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:16,643 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-26 15:30:16,648 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 15:30:16,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 15:30:16,848 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:16,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:16,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1997443259, now seen corresponding path program 2 times [2023-08-26 15:30:16,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:16,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931468649] [2023-08-26 15:30:16,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:16,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:17,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:17,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931468649] [2023-08-26 15:30:17,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931468649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:17,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503253940] [2023-08-26 15:30:17,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:30:17,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:17,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:17,181 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 15:30:17,183 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 15:30:17,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 15:30:17,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:17,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-26 15:30:17,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:17,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:17,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:17,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:19,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503253940] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:19,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:19,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-26 15:30:19,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702229098] [2023-08-26 15:30:19,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:19,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 15:30:19,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 15:30:19,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-08-26 15:30:19,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 188 [2023-08-26 15:30:19,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 50 transitions, 310 flow. Second operand has 25 states, 25 states have (on average 54.64) internal successors, (1366), 25 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:19,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:19,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 188 [2023-08-26 15:30:19,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:20,532 INFO L124 PetriNetUnfolderBase]: 1176/2386 cut-off events. [2023-08-26 15:30:20,532 INFO L125 PetriNetUnfolderBase]: For 5834/5834 co-relation queries the response was YES. [2023-08-26 15:30:20,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8471 conditions, 2386 events. 1176/2386 cut-off events. For 5834/5834 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 10832 event pairs, 209 based on Foata normal form. 138/2501 useless extension candidates. Maximal degree in co-relation 8442. Up to 541 conditions per place. [2023-08-26 15:30:20,547 INFO L140 encePairwiseOnDemand]: 182/188 looper letters, 203 selfloop transitions, 13 changer transitions 0/217 dead transitions. [2023-08-26 15:30:20,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 217 transitions, 1844 flow [2023-08-26 15:30:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 15:30:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 15:30:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 880 transitions. [2023-08-26 15:30:20,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343465045592705 [2023-08-26 15:30:20,549 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 880 transitions. [2023-08-26 15:30:20,549 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 880 transitions. [2023-08-26 15:30:20,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:20,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 880 transitions. [2023-08-26 15:30:20,551 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 62.857142857142854) internal successors, (880), 14 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:20,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 188.0) internal successors, (2820), 15 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:20,553 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 188.0) internal successors, (2820), 15 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:20,553 INFO L175 Difference]: Start difference. First operand has 78 places, 50 transitions, 310 flow. Second operand 14 states and 880 transitions. [2023-08-26 15:30:20,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 217 transitions, 1844 flow [2023-08-26 15:30:20,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 217 transitions, 1745 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:20,561 INFO L231 Difference]: Finished difference. Result has 95 places, 56 transitions, 399 flow [2023-08-26 15:30:20,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=399, PETRI_PLACES=95, PETRI_TRANSITIONS=56} [2023-08-26 15:30:20,561 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 60 predicate places. [2023-08-26 15:30:20,561 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 56 transitions, 399 flow [2023-08-26 15:30:20,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.64) internal successors, (1366), 25 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:20,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:20,562 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-08-26 15:30:20,567 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 15:30:20,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:20,769 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:20,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:20,769 INFO L85 PathProgramCache]: Analyzing trace with hash 593303941, now seen corresponding path program 2 times [2023-08-26 15:30:20,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:20,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533935326] [2023-08-26 15:30:20,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:20,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:21,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533935326] [2023-08-26 15:30:21,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533935326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134655538] [2023-08-26 15:30:21,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:30:21,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:21,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:21,107 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 15:30:21,108 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 15:30:21,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 15:30:21,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:21,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-26 15:30:21,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:21,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:21,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:21,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:23,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134655538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:23,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:23,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-26 15:30:23,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166067461] [2023-08-26 15:30:23,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:23,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 15:30:23,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 15:30:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2023-08-26 15:30:23,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 188 [2023-08-26 15:30:23,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 56 transitions, 399 flow. Second operand has 25 states, 25 states have (on average 55.64) internal successors, (1391), 25 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:23,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:23,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 188 [2023-08-26 15:30:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:24,971 INFO L124 PetriNetUnfolderBase]: 2400/4864 cut-off events. [2023-08-26 15:30:24,972 INFO L125 PetriNetUnfolderBase]: For 14383/14383 co-relation queries the response was YES. [2023-08-26 15:30:24,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17970 conditions, 4864 events. 2400/4864 cut-off events. For 14383/14383 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 26122 event pairs, 294 based on Foata normal form. 624/5441 useless extension candidates. Maximal degree in co-relation 17935. Up to 1134 conditions per place. [2023-08-26 15:30:25,002 INFO L140 encePairwiseOnDemand]: 182/188 looper letters, 368 selfloop transitions, 14 changer transitions 0/382 dead transitions. [2023-08-26 15:30:25,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 382 transitions, 3583 flow [2023-08-26 15:30:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 15:30:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 15:30:25,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 959 transitions. [2023-08-26 15:30:25,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36436170212765956 [2023-08-26 15:30:25,005 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 959 transitions. [2023-08-26 15:30:25,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 959 transitions. [2023-08-26 15:30:25,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:25,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 959 transitions. [2023-08-26 15:30:25,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 68.5) internal successors, (959), 14 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:25,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 188.0) internal successors, (2820), 15 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:25,009 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 188.0) internal successors, (2820), 15 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:25,009 INFO L175 Difference]: Start difference. First operand has 95 places, 56 transitions, 399 flow. Second operand 14 states and 959 transitions. [2023-08-26 15:30:25,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 382 transitions, 3583 flow [2023-08-26 15:30:25,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 382 transitions, 3125 flow, removed 156 selfloop flow, removed 7 redundant places. [2023-08-26 15:30:25,026 INFO L231 Difference]: Finished difference. Result has 107 places, 62 transitions, 473 flow [2023-08-26 15:30:25,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=473, PETRI_PLACES=107, PETRI_TRANSITIONS=62} [2023-08-26 15:30:25,027 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 72 predicate places. [2023-08-26 15:30:25,028 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 62 transitions, 473 flow [2023-08-26 15:30:25,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 55.64) internal successors, (1391), 25 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:25,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:25,028 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-08-26 15:30:25,036 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 15:30:25,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:25,234 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:25,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:25,234 INFO L85 PathProgramCache]: Analyzing trace with hash 246899179, now seen corresponding path program 3 times [2023-08-26 15:30:25,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:25,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297487355] [2023-08-26 15:30:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:25,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:25,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:25,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297487355] [2023-08-26 15:30:25,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297487355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:25,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322015130] [2023-08-26 15:30:25,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 15:30:25,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:25,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:25,437 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 15:30:25,439 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 15:30:25,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 15:30:25,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:25,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-26 15:30:25,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:25,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:25,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:25,813 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-08-26 15:30:25,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:25,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322015130] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:25,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:25,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-08-26 15:30:25,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209050320] [2023-08-26 15:30:25,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:25,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:25,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:25,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:25,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-26 15:30:25,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 188 [2023-08-26 15:30:25,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 62 transitions, 473 flow. Second operand has 7 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:25,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:25,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 188 [2023-08-26 15:30:25,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:26,413 INFO L124 PetriNetUnfolderBase]: 2348/4761 cut-off events. [2023-08-26 15:30:26,413 INFO L125 PetriNetUnfolderBase]: For 13286/13286 co-relation queries the response was YES. [2023-08-26 15:30:26,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17846 conditions, 4761 events. 2348/4761 cut-off events. For 13286/13286 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 25299 event pairs, 69 based on Foata normal form. 52/4767 useless extension candidates. Maximal degree in co-relation 17805. Up to 4275 conditions per place. [2023-08-26 15:30:26,451 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 123 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2023-08-26 15:30:26,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 130 transitions, 1119 flow [2023-08-26 15:30:26,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:30:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:30:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 391 transitions. [2023-08-26 15:30:26,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3466312056737589 [2023-08-26 15:30:26,454 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 391 transitions. [2023-08-26 15:30:26,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 391 transitions. [2023-08-26 15:30:26,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:26,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 391 transitions. [2023-08-26 15:30:26,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:26,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:26,456 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:26,456 INFO L175 Difference]: Start difference. First operand has 107 places, 62 transitions, 473 flow. Second operand 6 states and 391 transitions. [2023-08-26 15:30:26,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 130 transitions, 1119 flow [2023-08-26 15:30:26,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 130 transitions, 1077 flow, removed 13 selfloop flow, removed 7 redundant places. [2023-08-26 15:30:26,473 INFO L231 Difference]: Finished difference. Result has 105 places, 62 transitions, 411 flow [2023-08-26 15:30:26,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=411, PETRI_PLACES=105, PETRI_TRANSITIONS=62} [2023-08-26 15:30:26,474 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 70 predicate places. [2023-08-26 15:30:26,474 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 62 transitions, 411 flow [2023-08-26 15:30:26,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.0) internal successors, (399), 7 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:26,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:26,474 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-08-26 15:30:26,482 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 15:30:26,681 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,SelfDestructingSolverStorable12 [2023-08-26 15:30:26,682 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:26,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:26,682 INFO L85 PathProgramCache]: Analyzing trace with hash 2030507869, now seen corresponding path program 3 times [2023-08-26 15:30:26,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:26,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107324521] [2023-08-26 15:30:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:26,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:26,861 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 153 proven. 37 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:26,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:26,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107324521] [2023-08-26 15:30:26,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107324521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:26,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062750851] [2023-08-26 15:30:26,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 15:30:26,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:26,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:26,862 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 15:30:26,864 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 15:30:26,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 15:30:26,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:26,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 15:30:26,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:27,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:27,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-08-26 15:30:27,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:27,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062750851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:27,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:27,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 17 [2023-08-26 15:30:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357401184] [2023-08-26 15:30:27,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:27,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:27,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-26 15:30:27,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 188 [2023-08-26 15:30:27,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 62 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:27,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:27,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 188 [2023-08-26 15:30:27,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:27,792 INFO L124 PetriNetUnfolderBase]: 2302/4669 cut-off events. [2023-08-26 15:30:27,792 INFO L125 PetriNetUnfolderBase]: For 13055/13055 co-relation queries the response was YES. [2023-08-26 15:30:27,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16829 conditions, 4669 events. 2302/4669 cut-off events. For 13055/13055 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 24953 event pairs, 45 based on Foata normal form. 0/4669 useless extension candidates. Maximal degree in co-relation 16787. Up to 4230 conditions per place. [2023-08-26 15:30:27,819 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 108 selfloop transitions, 4 changer transitions 4/117 dead transitions. [2023-08-26 15:30:27,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 117 transitions, 1021 flow [2023-08-26 15:30:27,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:30:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:30:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 368 transitions. [2023-08-26 15:30:27,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3262411347517731 [2023-08-26 15:30:27,821 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 368 transitions. [2023-08-26 15:30:27,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 368 transitions. [2023-08-26 15:30:27,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:27,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 368 transitions. [2023-08-26 15:30:27,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.333333333333336) internal successors, (368), 6 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:27,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:27,823 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 188.0) internal successors, (1316), 7 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:27,823 INFO L175 Difference]: Start difference. First operand has 105 places, 62 transitions, 411 flow. Second operand 6 states and 368 transitions. [2023-08-26 15:30:27,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 117 transitions, 1021 flow [2023-08-26 15:30:27,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 117 transitions, 1005 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 15:30:27,837 INFO L231 Difference]: Finished difference. Result has 107 places, 61 transitions, 374 flow [2023-08-26 15:30:27,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=374, PETRI_PLACES=107, PETRI_TRANSITIONS=61} [2023-08-26 15:30:27,837 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 72 predicate places. [2023-08-26 15:30:27,838 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 61 transitions, 374 flow [2023-08-26 15:30:27,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.0) internal successors, (392), 7 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:27,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:27,838 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:27,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-26 15:30:28,047 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,SelfDestructingSolverStorable13 [2023-08-26 15:30:28,047 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:28,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:28,047 INFO L85 PathProgramCache]: Analyzing trace with hash -425197231, now seen corresponding path program 1 times [2023-08-26 15:30:28,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:28,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676996753] [2023-08-26 15:30:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:28,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:28,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:28,475 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-08-26 15:30:28,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:28,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676996753] [2023-08-26 15:30:28,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676996753] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:28,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154152034] [2023-08-26 15:30:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:28,478 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 15:30:28,484 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 15:30:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:28,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 15:30:28,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:28,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:28,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-08-26 15:30:28,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:28,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154152034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:28,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:28,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-08-26 15:30:28,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384140484] [2023-08-26 15:30:28,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:28,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:28,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:28,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-08-26 15:30:28,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 188 [2023-08-26 15:30:28,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 61 transitions, 374 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:28,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:28,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 188 [2023-08-26 15:30:28,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:29,440 INFO L124 PetriNetUnfolderBase]: 2255/4606 cut-off events. [2023-08-26 15:30:29,440 INFO L125 PetriNetUnfolderBase]: For 8914/8914 co-relation queries the response was YES. [2023-08-26 15:30:29,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16815 conditions, 4606 events. 2255/4606 cut-off events. For 8914/8914 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 25128 event pairs, 48 based on Foata normal form. 22/4628 useless extension candidates. Maximal degree in co-relation 16772. Up to 4172 conditions per place. [2023-08-26 15:30:29,462 INFO L140 encePairwiseOnDemand]: 179/188 looper letters, 53 selfloop transitions, 5 changer transitions 75/133 dead transitions. [2023-08-26 15:30:29,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 133 transitions, 1072 flow [2023-08-26 15:30:29,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:30:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:30:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 431 transitions. [2023-08-26 15:30:29,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32750759878419455 [2023-08-26 15:30:29,465 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 431 transitions. [2023-08-26 15:30:29,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 431 transitions. [2023-08-26 15:30:29,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:29,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 431 transitions. [2023-08-26 15:30:29,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.57142857142857) internal successors, (431), 7 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:29,467 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:29,467 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:29,467 INFO L175 Difference]: Start difference. First operand has 107 places, 61 transitions, 374 flow. Second operand 7 states and 431 transitions. [2023-08-26 15:30:29,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 133 transitions, 1072 flow [2023-08-26 15:30:29,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 133 transitions, 996 flow, removed 3 selfloop flow, removed 13 redundant places. [2023-08-26 15:30:29,482 INFO L231 Difference]: Finished difference. Result has 100 places, 56 transitions, 332 flow [2023-08-26 15:30:29,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332, PETRI_PLACES=100, PETRI_TRANSITIONS=56} [2023-08-26 15:30:29,482 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 65 predicate places. [2023-08-26 15:30:29,482 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 56 transitions, 332 flow [2023-08-26 15:30:29,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:29,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:29,482 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:29,499 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 15:30:29,688 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,SelfDestructingSolverStorable14 [2023-08-26 15:30:29,689 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:29,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:29,689 INFO L85 PathProgramCache]: Analyzing trace with hash 458943657, now seen corresponding path program 2 times [2023-08-26 15:30:29,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:29,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448806319] [2023-08-26 15:30:29,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:29,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2023-08-26 15:30:30,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448806319] [2023-08-26 15:30:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448806319] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806563120] [2023-08-26 15:30:30,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:30:30,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:30,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:30,066 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 15:30:30,068 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 15:30:30,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 15:30:30,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:30,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 15:30:30,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:30,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:30,360 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-08-26 15:30:30,372 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:30,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806563120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:30,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:30,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-08-26 15:30:30,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337891378] [2023-08-26 15:30:30,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:30,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:30,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-08-26 15:30:30,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 188 [2023-08-26 15:30:30,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 56 transitions, 332 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:30,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:30,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 188 [2023-08-26 15:30:30,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:30,481 INFO L124 PetriNetUnfolderBase]: 101/359 cut-off events. [2023-08-26 15:30:30,482 INFO L125 PetriNetUnfolderBase]: For 1422/1422 co-relation queries the response was YES. [2023-08-26 15:30:30,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1446 conditions, 359 events. 101/359 cut-off events. For 1422/1422 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 553 event pairs, 90 based on Foata normal form. 11/370 useless extension candidates. Maximal degree in co-relation 1411. Up to 232 conditions per place. [2023-08-26 15:30:30,483 INFO L140 encePairwiseOnDemand]: 182/188 looper letters, 52 selfloop transitions, 4 changer transitions 19/75 dead transitions. [2023-08-26 15:30:30,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 75 transitions, 579 flow [2023-08-26 15:30:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:30:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:30:30,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 409 transitions. [2023-08-26 15:30:30,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.310790273556231 [2023-08-26 15:30:30,486 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 409 transitions. [2023-08-26 15:30:30,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 409 transitions. [2023-08-26 15:30:30,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:30,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 409 transitions. [2023-08-26 15:30:30,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.42857142857143) internal successors, (409), 7 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:30,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:30,489 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 188.0) internal successors, (1504), 8 states have internal predecessors, (1504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:30,489 INFO L175 Difference]: Start difference. First operand has 100 places, 56 transitions, 332 flow. Second operand 7 states and 409 transitions. [2023-08-26 15:30:30,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 75 transitions, 579 flow [2023-08-26 15:30:30,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 75 transitions, 549 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-26 15:30:30,492 INFO L231 Difference]: Finished difference. Result has 98 places, 54 transitions, 305 flow [2023-08-26 15:30:30,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=305, PETRI_PLACES=98, PETRI_TRANSITIONS=54} [2023-08-26 15:30:30,492 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 63 predicate places. [2023-08-26 15:30:30,493 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 54 transitions, 305 flow [2023-08-26 15:30:30,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:30,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:30,493 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:30,499 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 15:30:30,699 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,SelfDestructingSolverStorable15 [2023-08-26 15:30:30,699 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:30,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:30,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1230153333, now seen corresponding path program 3 times [2023-08-26 15:30:30,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:30,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287327242] [2023-08-26 15:30:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-08-26 15:30:30,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:30,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287327242] [2023-08-26 15:30:30,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287327242] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:30,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73823357] [2023-08-26 15:30:30,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 15:30:30,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:30,926 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 15:30:30,928 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 15:30:31,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-26 15:30:31,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:31,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 15:30:31,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:31,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:31,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:31,248 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-08-26 15:30:31,248 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:31,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73823357] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:31,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:31,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-26 15:30:31,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579769427] [2023-08-26 15:30:31,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:31,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:31,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:31,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-26 15:30:31,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 188 [2023-08-26 15:30:31,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 54 transitions, 305 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:31,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:31,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 188 [2023-08-26 15:30:31,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:31,314 INFO L124 PetriNetUnfolderBase]: 53/208 cut-off events. [2023-08-26 15:30:31,314 INFO L125 PetriNetUnfolderBase]: For 238/238 co-relation queries the response was YES. [2023-08-26 15:30:31,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 208 events. 53/208 cut-off events. For 238/238 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 172 event pairs, 48 based on Foata normal form. 11/219 useless extension candidates. Maximal degree in co-relation 683. Up to 149 conditions per place. [2023-08-26 15:30:31,315 INFO L140 encePairwiseOnDemand]: 183/188 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-26 15:30:31,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 54 transitions, 411 flow [2023-08-26 15:30:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:30:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:30:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 292 transitions. [2023-08-26 15:30:31,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31063829787234043 [2023-08-26 15:30:31,316 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 292 transitions. [2023-08-26 15:30:31,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 292 transitions. [2023-08-26 15:30:31,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:31,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 292 transitions. [2023-08-26 15:30:31,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 58.4) internal successors, (292), 5 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:31,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:31,319 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 188.0) internal successors, (1128), 6 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:31,319 INFO L175 Difference]: Start difference. First operand has 98 places, 54 transitions, 305 flow. Second operand 5 states and 292 transitions. [2023-08-26 15:30:31,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 54 transitions, 411 flow [2023-08-26 15:30:31,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 54 transitions, 387 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-26 15:30:31,322 INFO L231 Difference]: Finished difference. Result has 90 places, 0 transitions, 0 flow [2023-08-26 15:30:31,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=188, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=90, PETRI_TRANSITIONS=0} [2023-08-26 15:30:31,322 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 55 predicate places. [2023-08-26 15:30:31,322 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 0 transitions, 0 flow [2023-08-26 15:30:31,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:31,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2023-08-26 15:30:31,324 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2023-08-26 15:30:31,325 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 19 remaining) [2023-08-26 15:30:31,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 15:30:31,532 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,SelfDestructingSolverStorable16 [2023-08-26 15:30:31,533 INFO L445 BasicCegarLoop]: Path program histogram: [3, 3, 3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:30:31,536 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:30:31,536 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:30:31,538 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:30:31 BasicIcfg [2023-08-26 15:30:31,538 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:30:31,538 INFO L158 Benchmark]: Toolchain (without parser) took 24307.08ms. Allocated memory was 367.0MB in the beginning and 658.5MB in the end (delta: 291.5MB). Free memory was 342.2MB in the beginning and 312.5MB in the end (delta: 29.7MB). Peak memory consumption was 321.7MB. Max. memory is 16.0GB. [2023-08-26 15:30:31,538 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 367.0MB. Free memory is still 343.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:30:31,539 INFO L158 Benchmark]: CACSL2BoogieTranslator took 436.59ms. Allocated memory is still 367.0MB. Free memory was 341.7MB in the beginning and 314.4MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 15:30:31,539 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.33ms. Allocated memory is still 367.0MB. Free memory was 314.4MB in the beginning and 311.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:30:31,539 INFO L158 Benchmark]: Boogie Preprocessor took 16.79ms. Allocated memory is still 367.0MB. Free memory was 311.8MB in the beginning and 310.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:30:31,539 INFO L158 Benchmark]: RCFGBuilder took 391.60ms. Allocated memory is still 367.0MB. Free memory was 310.2MB in the beginning and 294.5MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 15:30:31,539 INFO L158 Benchmark]: TraceAbstraction took 23426.67ms. Allocated memory was 367.0MB in the beginning and 658.5MB in the end (delta: 291.5MB). Free memory was 293.4MB in the beginning and 312.5MB in the end (delta: -19.0MB). Peak memory consumption was 273.5MB. Max. memory is 16.0GB. [2023-08-26 15:30:31,540 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 367.0MB. Free memory is still 343.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 436.59ms. Allocated memory is still 367.0MB. Free memory was 341.7MB in the beginning and 314.4MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 31.33ms. Allocated memory is still 367.0MB. Free memory was 314.4MB in the beginning and 311.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.79ms. Allocated memory is still 367.0MB. Free memory was 311.8MB in the beginning and 310.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 391.60ms. Allocated memory is still 367.0MB. Free memory was 310.2MB in the beginning and 294.5MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 23426.67ms. Allocated memory was 367.0MB in the beginning and 658.5MB in the end (delta: 291.5MB). Free memory was 293.4MB in the beginning and 312.5MB in the end (delta: -19.0MB). Peak memory consumption was 273.5MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 736]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [736] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 92 PlacesBefore, 35 PlacesAfterwards, 94 TransitionsBefore, 34 TransitionsAfterwards, 2268 CoEnabledTransitionPairs, 4 FixpointIterations, 21 TrivialSequentialCompositions, 63 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 4 ConcurrentYvCompositions, 3 ChoiceCompositions, 93 TotalNumberOfCompositions, 3244 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2179, independent: 2081, independent conditional: 0, independent unconditional: 2081, dependent: 98, dependent conditional: 0, dependent unconditional: 98, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1241, independent: 1215, independent conditional: 0, independent unconditional: 1215, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2179, independent: 866, independent conditional: 0, independent unconditional: 866, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 1241, unknown conditional: 0, unknown unconditional: 1241] , Statistics on independence cache: Total cache size (in pairs): 69, Positive cache size: 56, Positive conditional cache size: 0, Positive unconditional cache size: 56, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 117 locations, 19 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: 23.3s, OverallIterations: 17, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1772 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1772 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 29 mSDsCounter, 58 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2984 IncrementalHoareTripleChecker+Invalid, 3042 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 58 mSolverCounterUnsat, 5 mSDtfsCounter, 2984 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 676 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 8.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=473occurred in iteration=12, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 11.9s InterpolantComputationTime, 893 NumberOfCodeBlocks, 713 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 973 ConstructedInterpolants, 44 QuantifiedInterpolants, 11442 SizeOfPredicates, 37 NumberOfNonLiveVariables, 2337 ConjunctsInSsa, 215 ConjunctsInUnsatCore, 35 InterpolantComputations, 11 PerfectInterpolantSequences, 3044/3502 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 - AllSpecificationsHoldResult: All specifications hold 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:30:31,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...