/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_23-idxsense_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:30:43,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:30:43,954 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 15:30:43,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:30:43,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:30:43,989 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:30:43,990 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:30:43,990 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:30:43,991 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:30:43,995 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:30:43,995 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:30:43,995 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:30:43,995 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:30:43,997 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:30:43,997 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:30:43,997 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:30:43,997 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:30:43,998 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:30:43,998 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:30:43,998 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:30:43,998 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:30:43,999 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:30:43,999 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:30:43,999 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:30:44,000 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:30:44,000 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:30:44,000 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:30:44,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:44,000 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:30:44,001 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:30:44,002 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:30:44,002 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:30:44,002 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:30:44,002 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:30:44,002 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:30:44,003 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:30:44,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:30:44,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:30:44,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:30:44,351 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:30:44,351 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:30:44,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_23-idxsense_nr.i [2023-08-26 15:30:45,459 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:30:45,719 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:30:45,720 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_23-idxsense_nr.i [2023-08-26 15:30:45,734 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82d54021e/6144c2803c67495bbb7d04a1357a86ef/FLAG1e7c18063 [2023-08-26 15:30:45,747 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82d54021e/6144c2803c67495bbb7d04a1357a86ef [2023-08-26 15:30:45,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:30:45,750 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:30:45,751 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:45,751 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:30:45,753 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:30:45,754 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:45" (1/1) ... [2023-08-26 15:30:45,754 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62a2636a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:45, skipping insertion in model container [2023-08-26 15:30:45,755 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:45" (1/1) ... [2023-08-26 15:30:45,794 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:30:46,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:46,130 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:30:46,156 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:30:46,158 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:30:46,172 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:46,206 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:30:46,207 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46 WrapperNode [2023-08-26 15:30:46,207 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:46,208 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:46,208 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:30:46,208 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:30:46,214 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,240 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,256 INFO L138 Inliner]: procedures = 161, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2023-08-26 15:30:46,256 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:46,257 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:30:46,257 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:30:46,257 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:30:46,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,266 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,272 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,276 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,277 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,278 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:30:46,279 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:30:46,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:30:46,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:30:46,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (1/1) ... [2023-08-26 15:30:46,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:46,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:46,308 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 15:30:46,323 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 15:30:46,345 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:30:46,345 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:30:46,345 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:30:46,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:30:46,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:30:46,345 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:30:46,345 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:30:46,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:30:46,346 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:30:46,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:30:46,347 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 15:30:46,451 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:30:46,453 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:30:46,609 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:30:46,614 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:30:46,614 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 15:30:46,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:46 BoogieIcfgContainer [2023-08-26 15:30:46,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:30:46,618 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:30:46,618 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:30:46,621 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:30:46,621 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:30:45" (1/3) ... [2023-08-26 15:30:46,621 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1ad576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:46, skipping insertion in model container [2023-08-26 15:30:46,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:46" (2/3) ... [2023-08-26 15:30:46,622 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d1ad576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:46, skipping insertion in model container [2023-08-26 15:30:46,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:46" (3/3) ... [2023-08-26 15:30:46,623 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_23-idxsense_nr.i [2023-08-26 15:30:46,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:30:46,638 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 15:30:46,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:30:46,680 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:30:46,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 74 transitions, 153 flow [2023-08-26 15:30:46,764 INFO L124 PetriNetUnfolderBase]: 2/73 cut-off events. [2023-08-26 15:30:46,765 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:46,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 73 events. 2/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-08-26 15:30:46,769 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 74 transitions, 153 flow [2023-08-26 15:30:46,773 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 73 transitions, 149 flow [2023-08-26 15:30:46,776 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:30:46,797 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 73 transitions, 149 flow [2023-08-26 15:30:46,800 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 73 transitions, 149 flow [2023-08-26 15:30:46,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 149 flow [2023-08-26 15:30:46,829 INFO L124 PetriNetUnfolderBase]: 2/73 cut-off events. [2023-08-26 15:30:46,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:46,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 73 events. 2/73 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2023-08-26 15:30:46,831 INFO L119 LiptonReduction]: Number of co-enabled transitions 930 [2023-08-26 15:30:48,572 INFO L134 LiptonReduction]: Checked pairs total: 2727 [2023-08-26 15:30:48,572 INFO L136 LiptonReduction]: Total number of compositions: 70 [2023-08-26 15:30:48,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:30:48,589 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;@fc66e69, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:30:48,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-08-26 15:30:48,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:30:48,591 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-26 15:30:48,591 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:48,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:48,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 15:30:48,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:48,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:48,596 INFO L85 PathProgramCache]: Analyzing trace with hash 8736, now seen corresponding path program 1 times [2023-08-26 15:30:48,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:48,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809244603] [2023-08-26 15:30:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:48,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:48,768 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 15:30:48,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:48,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809244603] [2023-08-26 15:30:48,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809244603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:48,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:48,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:30:48,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837663985] [2023-08-26 15:30:48,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:48,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:30:48,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:48,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:30:48,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:30:48,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 144 [2023-08-26 15:30:48,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 65 flow. Second operand has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:48,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:48,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 144 [2023-08-26 15:30:48,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:48,908 INFO L124 PetriNetUnfolderBase]: 78/184 cut-off events. [2023-08-26 15:30:48,908 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:48,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365 conditions, 184 events. 78/184 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 689 event pairs, 77 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 352. Up to 177 conditions per place. [2023-08-26 15:30:48,913 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 22 selfloop transitions, 0 changer transitions 0/24 dead transitions. [2023-08-26 15:30:48,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 24 transitions, 95 flow [2023-08-26 15:30:48,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:30:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:30:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 173 transitions. [2023-08-26 15:30:48,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6006944444444444 [2023-08-26 15:30:48,927 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 173 transitions. [2023-08-26 15:30:48,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 173 transitions. [2023-08-26 15:30:48,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:48,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 173 transitions. [2023-08-26 15:30:48,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 86.5) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:48,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:48,941 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:48,943 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 65 flow. Second operand 2 states and 173 transitions. [2023-08-26 15:30:48,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 24 transitions, 95 flow [2023-08-26 15:30:48,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 24 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:48,946 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 50 flow [2023-08-26 15:30:48,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-08-26 15:30:48,951 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -7 predicate places. [2023-08-26 15:30:48,951 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 50 flow [2023-08-26 15:30:48,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:48,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:48,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:30:48,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:30:48,952 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:48,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 8398974, now seen corresponding path program 1 times [2023-08-26 15:30:48,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:48,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143772204] [2023-08-26 15:30:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:48,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:49,068 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 15:30:49,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:49,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143772204] [2023-08-26 15:30:49,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143772204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:49,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:49,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:30:49,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404559466] [2023-08-26 15:30:49,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:49,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:30:49,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:49,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:30:49,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:30:49,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 144 [2023-08-26 15:30:49,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:49,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 144 [2023-08-26 15:30:49,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:49,132 INFO L124 PetriNetUnfolderBase]: 78/185 cut-off events. [2023-08-26 15:30:49,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:49,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 185 events. 78/185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 688 event pairs, 77 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 364. Up to 177 conditions per place. [2023-08-26 15:30:49,134 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 21 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-26 15:30:49,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 98 flow [2023-08-26 15:30:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 216 transitions. [2023-08-26 15:30:49,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-26 15:30:49,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 216 transitions. [2023-08-26 15:30:49,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 216 transitions. [2023-08-26 15:30:49,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:49,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 216 transitions. [2023-08-26 15:30:49,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,140 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,140 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 50 flow. Second operand 3 states and 216 transitions. [2023-08-26 15:30:49,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 98 flow [2023-08-26 15:30:49,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 25 transitions, 98 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:30:49,141 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 62 flow [2023-08-26 15:30:49,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-26 15:30:49,142 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -4 predicate places. [2023-08-26 15:30:49,142 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 62 flow [2023-08-26 15:30:49,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:49,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 15:30:49,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:30:49,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:49,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 260252088, now seen corresponding path program 1 times [2023-08-26 15:30:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:49,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636447782] [2023-08-26 15:30:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:49,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:49,215 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 15:30:49,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:49,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636447782] [2023-08-26 15:30:49,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636447782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:49,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313678227] [2023-08-26 15:30:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:49,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:49,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:49,225 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 15:30:49,273 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 15:30:49,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:49,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 15:30:49,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:49,375 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 15:30:49,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:49,391 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 15:30:49,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313678227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:49,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:49,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 15:30:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050615285] [2023-08-26 15:30:49,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:49,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:49,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:30:49,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 144 [2023-08-26 15:30:49,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 25 transitions, 62 flow. Second operand has 7 states, 7 states have (on average 65.42857142857143) internal successors, (458), 7 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:49,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 144 [2023-08-26 15:30:49,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:49,474 INFO L124 PetriNetUnfolderBase]: 78/188 cut-off events. [2023-08-26 15:30:49,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:49,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 188 events. 78/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 688 event pairs, 77 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 378. Up to 177 conditions per place. [2023-08-26 15:30:49,478 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 21 selfloop transitions, 5 changer transitions 0/28 dead transitions. [2023-08-26 15:30:49,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 126 flow [2023-08-26 15:30:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:30:49,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:30:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 413 transitions. [2023-08-26 15:30:49,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47800925925925924 [2023-08-26 15:30:49,481 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 413 transitions. [2023-08-26 15:30:49,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 413 transitions. [2023-08-26 15:30:49,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:49,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 413 transitions. [2023-08-26 15:30:49,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.83333333333333) internal successors, (413), 6 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,486 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,487 INFO L175 Difference]: Start difference. First operand has 30 places, 25 transitions, 62 flow. Second operand 6 states and 413 transitions. [2023-08-26 15:30:49,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 126 flow [2023-08-26 15:30:49,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 122 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:49,488 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 94 flow [2023-08-26 15:30:49,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=94, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-08-26 15:30:49,490 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-26 15:30:49,490 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 94 flow [2023-08-26 15:30:49,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.42857142857143) internal successors, (458), 7 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:49,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:49,491 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 15:30:49,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 15:30:49,696 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 15:30:49,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:49,697 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:49,697 INFO L85 PathProgramCache]: Analyzing trace with hash 638691070, now seen corresponding path program 2 times [2023-08-26 15:30:49,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:49,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250805348] [2023-08-26 15:30:49,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:49,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:49,833 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 15:30:49,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:49,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250805348] [2023-08-26 15:30:49,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250805348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:49,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104488852] [2023-08-26 15:30:49,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:30:49,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:49,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:49,837 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 15:30:49,864 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 15:30:49,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 15:30:49,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:49,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 15:30:49,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:50,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:50,012 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 15:30:50,031 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 15:30:50,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:50,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104488852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:50,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:50,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 15:30:50,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118805735] [2023-08-26 15:30:50,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:50,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:30:50,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:50,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:30:50,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 15:30:50,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 144 [2023-08-26 15:30:50,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:50,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 144 [2023-08-26 15:30:50,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:50,104 INFO L124 PetriNetUnfolderBase]: 51/130 cut-off events. [2023-08-26 15:30:50,105 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:30:50,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 130 events. 51/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 371 event pairs, 45 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 275. Up to 112 conditions per place. [2023-08-26 15:30:50,107 INFO L140 encePairwiseOnDemand]: 138/144 looper letters, 26 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2023-08-26 15:30:50,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 160 flow [2023-08-26 15:30:50,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:50,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:50,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2023-08-26 15:30:50,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2023-08-26 15:30:50,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 162 transitions. [2023-08-26 15:30:50,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 162 transitions. [2023-08-26 15:30:50,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:50,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 162 transitions. [2023-08-26 15:30:50,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,111 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 94 flow. Second operand 3 states and 162 transitions. [2023-08-26 15:30:50,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 160 flow [2023-08-26 15:30:50,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 146 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:50,114 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 86 flow [2023-08-26 15:30:50,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-26 15:30:50,117 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-26 15:30:50,118 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 86 flow [2023-08-26 15:30:50,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:50,118 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 15:30:50,127 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 15:30:50,327 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 15:30:50,328 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:50,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash 638691071, now seen corresponding path program 1 times [2023-08-26 15:30:50,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:50,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982559055] [2023-08-26 15:30:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:50,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:50,432 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 15:30:50,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:50,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982559055] [2023-08-26 15:30:50,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982559055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:50,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630891148] [2023-08-26 15:30:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:50,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:50,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:50,435 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 15:30:50,437 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 15:30:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:50,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 15:30:50,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:50,515 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 15:30:50,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:50,591 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 15:30:50,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630891148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:50,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:50,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-26 15:30:50,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136930286] [2023-08-26 15:30:50,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:50,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 15:30:50,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:50,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 15:30:50,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-26 15:30:50,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 144 [2023-08-26 15:30:50,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 86 flow. Second operand has 12 states, 12 states have (on average 65.16666666666667) internal successors, (782), 12 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:50,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 144 [2023-08-26 15:30:50,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:50,663 INFO L124 PetriNetUnfolderBase]: 46/126 cut-off events. [2023-08-26 15:30:50,664 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-26 15:30:50,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 126 events. 46/126 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 353 event pairs, 45 based on Foata normal form. 6/113 useless extension candidates. Maximal degree in co-relation 286. Up to 111 conditions per place. [2023-08-26 15:30:50,666 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 19 selfloop transitions, 11 changer transitions 0/32 dead transitions. [2023-08-26 15:30:50,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 32 transitions, 182 flow [2023-08-26 15:30:50,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:30:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:30:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 804 transitions. [2023-08-26 15:30:50,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4652777777777778 [2023-08-26 15:30:50,668 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 804 transitions. [2023-08-26 15:30:50,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 804 transitions. [2023-08-26 15:30:50,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:50,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 804 transitions. [2023-08-26 15:30:50,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 67.0) internal successors, (804), 12 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,675 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 144.0) internal successors, (1872), 13 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,675 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 86 flow. Second operand 12 states and 804 transitions. [2023-08-26 15:30:50,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 32 transitions, 182 flow [2023-08-26 15:30:50,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 32 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:50,678 INFO L231 Difference]: Finished difference. Result has 52 places, 32 transitions, 166 flow [2023-08-26 15:30:50,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=166, PETRI_PLACES=52, PETRI_TRANSITIONS=32} [2023-08-26 15:30:50,680 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 18 predicate places. [2023-08-26 15:30:50,680 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 32 transitions, 166 flow [2023-08-26 15:30:50,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 65.16666666666667) internal successors, (782), 12 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:50,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:50,681 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 15:30:50,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 15:30:50,886 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 15:30:50,886 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:50,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:50,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1591489345, now seen corresponding path program 2 times [2023-08-26 15:30:50,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:50,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493054627] [2023-08-26 15:30:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:50,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:51,084 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 15:30:51,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:51,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493054627] [2023-08-26 15:30:51,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493054627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:51,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:51,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:30:51,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198836724] [2023-08-26 15:30:51,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:51,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:30:51,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:51,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:30:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:30:51,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 144 [2023-08-26 15:30:51,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 32 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:51,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 144 [2023-08-26 15:30:51,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:51,137 INFO L124 PetriNetUnfolderBase]: 33/96 cut-off events. [2023-08-26 15:30:51,137 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 15:30:51,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 96 events. 33/96 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 202 event pairs, 32 based on Foata normal form. 5/100 useless extension candidates. Maximal degree in co-relation 244. Up to 92 conditions per place. [2023-08-26 15:30:51,139 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 25 selfloop transitions, 1 changer transitions 2/29 dead transitions. [2023-08-26 15:30:51,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 29 transitions, 216 flow [2023-08-26 15:30:51,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:51,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:51,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 159 transitions. [2023-08-26 15:30:51,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3680555555555556 [2023-08-26 15:30:51,141 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 159 transitions. [2023-08-26 15:30:51,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 159 transitions. [2023-08-26 15:30:51,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:51,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 159 transitions. [2023-08-26 15:30:51,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,143 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,143 INFO L175 Difference]: Start difference. First operand has 52 places, 32 transitions, 166 flow. Second operand 3 states and 159 transitions. [2023-08-26 15:30:51,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 29 transitions, 216 flow [2023-08-26 15:30:51,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 29 transitions, 168 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 15:30:51,149 INFO L231 Difference]: Finished difference. Result has 46 places, 27 transitions, 110 flow [2023-08-26 15:30:51,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=46, PETRI_TRANSITIONS=27} [2023-08-26 15:30:51,151 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 12 predicate places. [2023-08-26 15:30:51,152 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 27 transitions, 110 flow [2023-08-26 15:30:51,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 4 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:51,152 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:51,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:30:51,152 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:51,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:51,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1693368317, now seen corresponding path program 1 times [2023-08-26 15:30:51,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:51,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181879080] [2023-08-26 15:30:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:51,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:51,281 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 15:30:51,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:51,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181879080] [2023-08-26 15:30:51,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181879080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:51,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:51,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:30:51,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455431347] [2023-08-26 15:30:51,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:51,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:30:51,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:51,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:30:51,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:30:51,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 144 [2023-08-26 15:30:51,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 27 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:51,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 144 [2023-08-26 15:30:51,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:51,312 INFO L124 PetriNetUnfolderBase]: 9/45 cut-off events. [2023-08-26 15:30:51,312 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-26 15:30:51,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 45 events. 9/45 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 46 event pairs, 0 based on Foata normal form. 5/50 useless extension candidates. Maximal degree in co-relation 120. Up to 25 conditions per place. [2023-08-26 15:30:51,312 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 24 selfloop transitions, 3 changer transitions 3/31 dead transitions. [2023-08-26 15:30:51,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 31 transitions, 179 flow [2023-08-26 15:30:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 211 transitions. [2023-08-26 15:30:51,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48842592592592593 [2023-08-26 15:30:51,314 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 211 transitions. [2023-08-26 15:30:51,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 211 transitions. [2023-08-26 15:30:51,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:51,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 211 transitions. [2023-08-26 15:30:51,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,316 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,316 INFO L175 Difference]: Start difference. First operand has 46 places, 27 transitions, 110 flow. Second operand 3 states and 211 transitions. [2023-08-26 15:30:51,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 31 transitions, 179 flow [2023-08-26 15:30:51,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 31 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:51,317 INFO L231 Difference]: Finished difference. Result has 45 places, 27 transitions, 115 flow [2023-08-26 15:30:51,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=27} [2023-08-26 15:30:51,318 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 11 predicate places. [2023-08-26 15:30:51,318 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 27 transitions, 115 flow [2023-08-26 15:30:51,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:51,318 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:51,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:30:51,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-08-26 15:30:51,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:51,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1969104677, now seen corresponding path program 2 times [2023-08-26 15:30:51,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:51,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005573350] [2023-08-26 15:30:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:51,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:51,434 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 15:30:51,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:51,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005573350] [2023-08-26 15:30:51,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005573350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:51,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:51,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:30:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807581977] [2023-08-26 15:30:51,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:51,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:30:51,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:51,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:30:51,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:30:51,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 144 [2023-08-26 15:30:51,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 27 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 43.333333333333336) internal successors, (260), 6 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:51,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 144 [2023-08-26 15:30:51,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:51,480 INFO L124 PetriNetUnfolderBase]: 11/47 cut-off events. [2023-08-26 15:30:51,480 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-26 15:30:51,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 47 events. 11/47 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 46 event pairs, 8 based on Foata normal form. 2/49 useless extension candidates. Maximal degree in co-relation 131. Up to 29 conditions per place. [2023-08-26 15:30:51,481 INFO L140 encePairwiseOnDemand]: 139/144 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2023-08-26 15:30:51,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 27 transitions, 165 flow [2023-08-26 15:30:51,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:30:51,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:30:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2023-08-26 15:30:51,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159722222222222 [2023-08-26 15:30:51,482 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 182 transitions. [2023-08-26 15:30:51,483 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 182 transitions. [2023-08-26 15:30:51,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:51,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 182 transitions. [2023-08-26 15:30:51,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.5) internal successors, (182), 4 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,485 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,485 INFO L175 Difference]: Start difference. First operand has 45 places, 27 transitions, 115 flow. Second operand 4 states and 182 transitions. [2023-08-26 15:30:51,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 27 transitions, 165 flow [2023-08-26 15:30:51,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 27 transitions, 159 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:51,486 INFO L231 Difference]: Finished difference. Result has 44 places, 0 transitions, 0 flow [2023-08-26 15:30:51,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=44, PETRI_TRANSITIONS=0} [2023-08-26 15:30:51,487 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-08-26 15:30:51,487 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 0 transitions, 0 flow [2023-08-26 15:30:51,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.333333333333336) internal successors, (260), 6 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:51,489 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2023-08-26 15:30:51,490 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2023-08-26 15:30:51,490 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2023-08-26 15:30:51,490 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2023-08-26 15:30:51,490 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2023-08-26 15:30:51,490 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2023-08-26 15:30:51,490 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2023-08-26 15:30:51,490 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2023-08-26 15:30:51,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2023-08-26 15:30:51,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2023-08-26 15:30:51,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 19 remaining) [2023-08-26 15:30:51,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2023-08-26 15:30:51,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2023-08-26 15:30:51,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2023-08-26 15:30:51,491 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2023-08-26 15:30:51,492 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2023-08-26 15:30:51,492 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2023-08-26 15:30:51,492 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2023-08-26 15:30:51,492 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 19 remaining) [2023-08-26 15:30:51,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:30:51,492 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1] [2023-08-26 15:30:51,497 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:30:51,497 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:30:51,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:30:51 BasicIcfg [2023-08-26 15:30:51,500 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:30:51,501 INFO L158 Benchmark]: Toolchain (without parser) took 5750.54ms. Allocated memory was 329.3MB in the beginning and 526.4MB in the end (delta: 197.1MB). Free memory was 305.1MB in the beginning and 355.8MB in the end (delta: -50.7MB). Peak memory consumption was 148.6MB. Max. memory is 16.0GB. [2023-08-26 15:30:51,501 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 329.3MB. Free memory is still 306.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:30:51,501 INFO L158 Benchmark]: CACSL2BoogieTranslator took 456.14ms. Allocated memory is still 329.3MB. Free memory was 305.1MB in the beginning and 285.7MB in the end (delta: 19.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 15:30:51,501 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.37ms. Allocated memory is still 329.3MB. Free memory was 285.7MB in the beginning and 284.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:30:51,501 INFO L158 Benchmark]: Boogie Preprocessor took 21.72ms. Allocated memory is still 329.3MB. Free memory was 283.7MB in the beginning and 282.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:30:51,502 INFO L158 Benchmark]: RCFGBuilder took 337.19ms. Allocated memory is still 329.3MB. Free memory was 282.2MB in the beginning and 268.0MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 15:30:51,502 INFO L158 Benchmark]: TraceAbstraction took 4882.37ms. Allocated memory was 329.3MB in the beginning and 526.4MB in the end (delta: 197.1MB). Free memory was 267.4MB in the beginning and 355.8MB in the end (delta: -88.4MB). Peak memory consumption was 110.8MB. Max. memory is 16.0GB. [2023-08-26 15:30:51,503 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 329.3MB. Free memory is still 306.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 456.14ms. Allocated memory is still 329.3MB. Free memory was 305.1MB in the beginning and 285.7MB in the end (delta: 19.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.37ms. Allocated memory is still 329.3MB. Free memory was 285.7MB in the beginning and 284.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 21.72ms. Allocated memory is still 329.3MB. Free memory was 283.7MB in the beginning and 282.2MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 337.19ms. Allocated memory is still 329.3MB. Free memory was 282.2MB in the beginning and 268.0MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4882.37ms. Allocated memory was 329.3MB in the beginning and 526.4MB in the end (delta: 197.1MB). Free memory was 267.4MB in the beginning and 355.8MB in the end (delta: -88.4MB). Peak memory consumption was 110.8MB. 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] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 75 PlacesBefore, 34 PlacesAfterwards, 73 TransitionsBefore, 31 TransitionsAfterwards, 930 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 70 TotalNumberOfCompositions, 2727 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1502, independent: 1335, independent conditional: 0, independent unconditional: 1335, dependent: 167, dependent conditional: 0, dependent unconditional: 167, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 529, independent: 501, independent conditional: 0, independent unconditional: 501, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1502, independent: 834, independent conditional: 0, independent unconditional: 834, dependent: 139, dependent conditional: 0, dependent unconditional: 139, unknown: 529, unknown conditional: 0, unknown unconditional: 529] , Statistics on independence cache: Total cache size (in pairs): 67, Positive cache size: 50, Positive conditional cache size: 0, Positive unconditional cache size: 50, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, 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, 90 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: 4.8s, OverallIterations: 8, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 75 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 298 IncrementalHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 1 mSDtfsCounter, 298 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=166occurred in iteration=5, InterpolantAutomatonStates: 36, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 110 NumberOfCodeBlocks, 106 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 583 SizeOfPredicates, 2 NumberOfNonLiveVariables, 233 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 13 InterpolantComputations, 6 PerfectInterpolantSequences, 175/218 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 15:30:51,521 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...