/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/04-mutex_42-trylock_2mutex.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:29:43,767 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:29:43,824 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 15:29:43,833 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:29:43,833 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:29:43,872 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:29:43,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:29:43,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:29:43,874 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:29:43,878 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:29:43,878 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:29:43,878 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:29:43,878 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:29:43,880 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:29:43,880 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:29:43,880 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:29:43,880 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:29:43,881 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:29:43,881 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:29:43,881 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:29:43,881 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:29:43,882 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:29:43,882 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:29:43,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:29:43,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:29:43,883 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:29:43,883 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:29:43,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:29:43,884 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:29:43,884 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:29:43,885 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:29:43,885 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:29:43,885 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:29:43,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:29:43,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:29:43,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:29:44,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:29:44,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:29:44,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:29:44,265 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:29:44,265 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:29:44,266 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/04-mutex_42-trylock_2mutex.i [2023-08-26 15:29:45,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:29:45,814 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:29:45,815 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/04-mutex_42-trylock_2mutex.i [2023-08-26 15:29:45,831 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca058f42/b3ebd1ebb960467e93c4d8933c11bf18/FLAGf27791ae8 [2023-08-26 15:29:45,846 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eca058f42/b3ebd1ebb960467e93c4d8933c11bf18 [2023-08-26 15:29:45,851 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:29:45,853 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:29:45,855 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:29:45,855 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:29:45,858 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:29:45,859 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:29:45" (1/1) ... [2023-08-26 15:29:45,860 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a8c6e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:45, skipping insertion in model container [2023-08-26 15:29:45,860 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:29:45" (1/1) ... [2023-08-26 15:29:45,904 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:29:46,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:29:46,219 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:29:46,247 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:29:46,254 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 15:29:46,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:29:46,317 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:29:46,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46 WrapperNode [2023-08-26 15:29:46,318 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:29:46,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:29:46,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:29:46,319 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:29:46,325 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,346 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,364 INFO L138 Inliner]: procedures = 163, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2023-08-26 15:29:46,364 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:29:46,365 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:29:46,365 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:29:46,365 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:29:46,373 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,373 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,375 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,376 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,382 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,383 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,384 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,386 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:29:46,387 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:29:46,387 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:29:46,387 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:29:46,388 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (1/1) ... [2023-08-26 15:29:46,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:29:46,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:29:46,415 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 15:29:46,424 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 15:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:29:46,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:29:46,448 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2023-08-26 15:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:29:46,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:29:46,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:29:46,449 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 15:29:46,594 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:29:46,596 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:29:46,763 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:29:46,768 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:29:46,768 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 15:29:46,770 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:29:46 BoogieIcfgContainer [2023-08-26 15:29:46,770 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:29:46,772 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:29:46,772 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:29:46,779 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:29:46,780 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:29:45" (1/3) ... [2023-08-26 15:29:46,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bb7aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:29:46, skipping insertion in model container [2023-08-26 15:29:46,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:29:46" (2/3) ... [2023-08-26 15:29:46,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bb7aed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:29:46, skipping insertion in model container [2023-08-26 15:29:46,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:29:46" (3/3) ... [2023-08-26 15:29:46,782 INFO L112 eAbstractionObserver]: Analyzing ICFG 04-mutex_42-trylock_2mutex.i [2023-08-26 15:29:46,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:29:46,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-26 15:29:46,802 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:29:46,878 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:29:46,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 148 flow [2023-08-26 15:29:46,965 INFO L124 PetriNetUnfolderBase]: 2/69 cut-off events. [2023-08-26 15:29:46,965 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:29:46,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 69 events. 2/69 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 62 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 34. Up to 2 conditions per place. [2023-08-26 15:29:46,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 148 flow [2023-08-26 15:29:46,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 61 transitions, 125 flow [2023-08-26 15:29:46,980 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:29:46,988 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 63 places, 61 transitions, 125 flow [2023-08-26 15:29:46,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 63 places, 61 transitions, 125 flow [2023-08-26 15:29:46,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 61 transitions, 125 flow [2023-08-26 15:29:47,014 INFO L124 PetriNetUnfolderBase]: 2/61 cut-off events. [2023-08-26 15:29:47,014 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:47,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 61 events. 2/61 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-08-26 15:29:47,015 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2023-08-26 15:29:49,058 INFO L134 LiptonReduction]: Checked pairs total: 1608 [2023-08-26 15:29:49,059 INFO L136 LiptonReduction]: Total number of compositions: 49 [2023-08-26 15:29:49,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:29:49,077 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;@38689ab9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:29:49,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 15:29:49,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:29:49,078 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:29:49,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:49,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:49,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:29:49,080 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 15:29:49,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:49,083 INFO L85 PathProgramCache]: Analyzing trace with hash 245, now seen corresponding path program 1 times [2023-08-26 15:29:49,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:49,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991056926] [2023-08-26 15:29:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:49,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:49,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:49,189 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 15:29:49,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:49,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991056926] [2023-08-26 15:29:49,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991056926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:49,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:49,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:29:49,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780628881] [2023-08-26 15:29:49,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:49,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:29:49,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:29:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:29:49,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 119 [2023-08-26 15:29:49,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 45 flow. Second operand has 2 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:49,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 119 [2023-08-26 15:29:49,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:49,285 INFO L124 PetriNetUnfolderBase]: 49/114 cut-off events. [2023-08-26 15:29:49,285 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:49,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225 conditions, 114 events. 49/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 363 event pairs, 42 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 216. Up to 107 conditions per place. [2023-08-26 15:29:49,289 INFO L140 encePairwiseOnDemand]: 116/119 looper letters, 16 selfloop transitions, 0 changer transitions 0/18 dead transitions. [2023-08-26 15:29:49,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 71 flow [2023-08-26 15:29:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:29:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:29:49,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 153 transitions. [2023-08-26 15:29:49,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2023-08-26 15:29:49,303 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 153 transitions. [2023-08-26 15:29:49,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 153 transitions. [2023-08-26 15:29:49,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:49,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 153 transitions. [2023-08-26 15:29:49,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 76.5) internal successors, (153), 2 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,319 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,321 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 45 flow. Second operand 2 states and 153 transitions. [2023-08-26 15:29:49,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 71 flow [2023-08-26 15:29:49,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 18 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:49,324 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 38 flow [2023-08-26 15:29:49,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-26 15:29:49,329 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2023-08-26 15:29:49,330 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 38 flow [2023-08-26 15:29:49,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 67.5) internal successors, (135), 2 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:49,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:29:49,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:29:49,331 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 15:29:49,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:49,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1867543615, now seen corresponding path program 1 times [2023-08-26 15:29:49,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:49,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419449152] [2023-08-26 15:29:49,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:49,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:49,567 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 15:29:49,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:49,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419449152] [2023-08-26 15:29:49,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419449152] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:49,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:49,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:49,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311344803] [2023-08-26 15:29:49,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:49,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:49,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:49,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:49,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:49,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 119 [2023-08-26 15:29:49,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:49,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 119 [2023-08-26 15:29:49,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:49,602 INFO L124 PetriNetUnfolderBase]: 43/101 cut-off events. [2023-08-26 15:29:49,602 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:49,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 101 events. 43/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 294 event pairs, 36 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 196. Up to 93 conditions per place. [2023-08-26 15:29:49,603 INFO L140 encePairwiseOnDemand]: 117/119 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 15:29:49,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 66 flow [2023-08-26 15:29:49,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:49,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:49,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 181 transitions. [2023-08-26 15:29:49,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2023-08-26 15:29:49,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 181 transitions. [2023-08-26 15:29:49,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 181 transitions. [2023-08-26 15:29:49,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:49,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 181 transitions. [2023-08-26 15:29:49,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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 15:29:49,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,609 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 38 flow. Second operand 3 states and 181 transitions. [2023-08-26 15:29:49,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 66 flow [2023-08-26 15:29:49,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:29:49,610 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 38 flow [2023-08-26 15:29:49,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-08-26 15:29:49,610 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-26 15:29:49,611 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 38 flow [2023-08-26 15:29:49,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:29:49,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:29:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:29:49,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-08-26 15:29:49,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:29:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1867543616, now seen corresponding path program 1 times [2023-08-26 15:29:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:29:49,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363767406] [2023-08-26 15:29:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:29:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:29:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:29:49,675 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 15:29:49,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:29:49,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363767406] [2023-08-26 15:29:49,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363767406] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:29:49,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:29:49,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:29:49,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229263618] [2023-08-26 15:29:49,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:29:49,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:29:49,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:29:49,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:29:49,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:29:49,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 119 [2023-08-26 15:29:49,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:29:49,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 119 [2023-08-26 15:29:49,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:29:49,725 INFO L124 PetriNetUnfolderBase]: 37/88 cut-off events. [2023-08-26 15:29:49,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:29:49,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 88 events. 37/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 240 event pairs, 30 based on Foata normal form. 7/86 useless extension candidates. Maximal degree in co-relation 171. Up to 80 conditions per place. [2023-08-26 15:29:49,726 INFO L140 encePairwiseOnDemand]: 117/119 looper letters, 0 selfloop transitions, 0 changer transitions 16/16 dead transitions. [2023-08-26 15:29:49,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 64 flow [2023-08-26 15:29:49,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:29:49,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:29:49,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2023-08-26 15:29:49,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2023-08-26 15:29:49,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2023-08-26 15:29:49,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2023-08-26 15:29:49,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:29:49,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2023-08-26 15:29:49,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.0) internal successors, (177), 3 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,735 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 38 flow. Second operand 3 states and 177 transitions. [2023-08-26 15:29:49,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 64 flow [2023-08-26 15:29:49,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:29:49,735 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-26 15:29:49,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=35, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-26 15:29:49,736 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -1 predicate places. [2023-08-26 15:29:49,737 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-26 15:29:49,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:29:49,739 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2023-08-26 15:29:49,740 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2023-08-26 15:29:49,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2023-08-26 15:29:49,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2023-08-26 15:29:49,741 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-26 15:29:49,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:29:49,742 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 15:29:49,744 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:29:49,745 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:29:49,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:29:49 BasicIcfg [2023-08-26 15:29:49,749 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:29:49,749 INFO L158 Benchmark]: Toolchain (without parser) took 3896.48ms. Allocated memory was 371.2MB in the beginning and 505.4MB in the end (delta: 134.2MB). Free memory was 346.2MB in the beginning and 393.1MB in the end (delta: -46.8MB). Peak memory consumption was 88.8MB. Max. memory is 16.0GB. [2023-08-26 15:29:49,750 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 371.2MB. Free memory is still 348.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:29:49,750 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.71ms. Allocated memory is still 371.2MB. Free memory was 345.8MB in the beginning and 326.9MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 15:29:49,751 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.69ms. Allocated memory is still 371.2MB. Free memory was 326.9MB in the beginning and 324.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:29:49,751 INFO L158 Benchmark]: Boogie Preprocessor took 21.13ms. Allocated memory is still 371.2MB. Free memory was 324.9MB in the beginning and 323.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:29:49,751 INFO L158 Benchmark]: RCFGBuilder took 383.73ms. Allocated memory is still 371.2MB. Free memory was 323.7MB in the beginning and 309.5MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 15:29:49,753 INFO L158 Benchmark]: TraceAbstraction took 2976.51ms. Allocated memory was 371.2MB in the beginning and 505.4MB in the end (delta: 134.2MB). Free memory was 309.1MB in the beginning and 393.1MB in the end (delta: -83.9MB). Peak memory consumption was 53.2MB. Max. memory is 16.0GB. [2023-08-26 15:29:49,756 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 371.2MB. Free memory is still 348.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 462.71ms. Allocated memory is still 371.2MB. Free memory was 345.8MB in the beginning and 326.9MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 45.69ms. Allocated memory is still 371.2MB. Free memory was 326.9MB in the beginning and 324.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.13ms. Allocated memory is still 371.2MB. Free memory was 324.9MB in the beginning and 323.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 383.73ms. Allocated memory is still 371.2MB. Free memory was 323.7MB in the beginning and 309.5MB in the end (delta: 14.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 2976.51ms. Allocated memory was 371.2MB in the beginning and 505.4MB in the end (delta: 134.2MB). Free memory was 309.1MB in the beginning and 393.1MB in the end (delta: -83.9MB). Peak memory consumption was 53.2MB. 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: 2.1s, 63 PlacesBefore, 23 PlacesAfterwards, 61 TransitionsBefore, 21 TransitionsAfterwards, 540 CoEnabledTransitionPairs, 6 FixpointIterations, 30 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 0 ChoiceCompositions, 49 TotalNumberOfCompositions, 1608 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 716, independent: 576, independent conditional: 0, independent unconditional: 576, dependent: 140, dependent conditional: 0, dependent unconditional: 140, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 283, independent: 260, independent conditional: 0, independent unconditional: 260, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 716, independent: 316, independent conditional: 0, independent unconditional: 316, dependent: 117, dependent conditional: 0, dependent unconditional: 117, unknown: 283, unknown conditional: 0, unknown unconditional: 283] , Statistics on independence cache: Total cache size (in pairs): 39, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, 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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 86 locations, 5 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: 2.8s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 19 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 19 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45 IncrementalHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 45 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=0, InterpolantAutomatonStates: 8, 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, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 84 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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 4 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:29:49,784 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...