/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/36-apron_11-traces-max-simple_true.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:09:25,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:09:25,207 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 16:09:25,212 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:09:25,213 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:09:25,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:09:25,245 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:09:25,245 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:09:25,246 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:09:25,250 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:09:25,250 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:09:25,250 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:09:25,250 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:09:25,252 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:09:25,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:09:25,252 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:09:25,252 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:09:25,253 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:09:25,253 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:09:25,253 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:09:25,253 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:09:25,254 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:09:25,254 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:09:25,254 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:09:25,255 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:09:25,255 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:09:25,255 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:09:25,255 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:09:25,256 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:09:25,256 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:09:25,257 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:09:25,257 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:09:25,257 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:09:25,257 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:09:25,257 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:09:25,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:09:25,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:09:25,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:09:25,630 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:09:25,631 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:09:25,632 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:09:25,633 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/36-apron_11-traces-max-simple_true.i [2023-08-26 16:09:26,822 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:09:27,094 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:09:27,095 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/36-apron_11-traces-max-simple_true.i [2023-08-26 16:09:27,108 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65b7b507/e6601ad5a336449282ad043eb677f786/FLAG486d3edd4 [2023-08-26 16:09:27,124 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b65b7b507/e6601ad5a336449282ad043eb677f786 [2023-08-26 16:09:27,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:09:27,127 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:09:27,128 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:09:27,128 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:09:27,131 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:09:27,131 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,132 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f395786 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27, skipping insertion in model container [2023-08-26 16:09:27,132 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,173 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:09:27,384 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:09:27,400 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:09:27,430 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-26 16:09:27,432 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-26 16:09:27,460 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:09:27,497 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:09:27,498 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27 WrapperNode [2023-08-26 16:09:27,498 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:09:27,499 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:09:27,499 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:09:27,499 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:09:27,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,538 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,561 INFO L138 Inliner]: procedures = 162, calls = 22, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 62 [2023-08-26 16:09:27,562 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:09:27,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:09:27,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:09:27,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:09:27,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,578 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,588 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,590 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,591 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,592 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,594 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:09:27,594 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:09:27,595 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:09:27,595 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:09:27,595 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (1/1) ... [2023-08-26 16:09:27,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:09:27,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:09:27,631 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 16:09:27,640 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 16:09:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:09:27,670 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 16:09:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:09:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:09:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 16:09:27,671 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 16:09:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:09:27,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:09:27,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:09:27,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:09:27,673 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 16:09:27,814 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:09:27,816 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:09:27,943 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:09:27,949 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:09:27,949 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 16:09:27,951 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:09:27 BoogieIcfgContainer [2023-08-26 16:09:27,951 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:09:27,953 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:09:27,953 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:09:27,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:09:27,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:09:27" (1/3) ... [2023-08-26 16:09:27,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12511a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:09:27, skipping insertion in model container [2023-08-26 16:09:27,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:09:27" (2/3) ... [2023-08-26 16:09:27,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12511a80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:09:27, skipping insertion in model container [2023-08-26 16:09:27,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:09:27" (3/3) ... [2023-08-26 16:09:27,959 INFO L112 eAbstractionObserver]: Analyzing ICFG 36-apron_11-traces-max-simple_true.i [2023-08-26 16:09:27,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:09:27,978 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-08-26 16:09:27,978 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:09:28,028 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 16:09:28,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 70 transitions, 145 flow [2023-08-26 16:09:28,092 INFO L124 PetriNetUnfolderBase]: 4/69 cut-off events. [2023-08-26 16:09:28,092 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:09:28,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 69 events. 4/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-08-26 16:09:28,098 INFO L82 GeneralOperation]: Start removeDead. Operand has 70 places, 70 transitions, 145 flow [2023-08-26 16:09:28,101 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 69 transitions, 141 flow [2023-08-26 16:09:28,104 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:09:28,112 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 69 transitions, 141 flow [2023-08-26 16:09:28,121 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 69 transitions, 141 flow [2023-08-26 16:09:28,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 69 transitions, 141 flow [2023-08-26 16:09:28,165 INFO L124 PetriNetUnfolderBase]: 4/69 cut-off events. [2023-08-26 16:09:28,166 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:09:28,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 69 events. 4/69 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2023-08-26 16:09:28,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 912 [2023-08-26 16:09:30,017 INFO L134 LiptonReduction]: Checked pairs total: 1600 [2023-08-26 16:09:30,017 INFO L136 LiptonReduction]: Total number of compositions: 80 [2023-08-26 16:09:30,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 16:09:30,036 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;@700b7480, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:09:30,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 16:09:30,037 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:09:30,037 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 16:09:30,037 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:09:30,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:09:30,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 16:09:30,039 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 16:09:30,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:09:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash 287, now seen corresponding path program 1 times [2023-08-26 16:09:30,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:09:30,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160689587] [2023-08-26 16:09:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:09:30,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:09:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:09:30,143 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 16:09:30,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:09:30,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160689587] [2023-08-26 16:09:30,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160689587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:09:30,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:09:30,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 16:09:30,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869621751] [2023-08-26 16:09:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:09:30,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 16:09:30,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:09:30,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 16:09:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 16:09:30,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 150 [2023-08-26 16:09:30,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 37 flow. Second operand has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:09:30,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 150 [2023-08-26 16:09:30,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:09:30,203 INFO L124 PetriNetUnfolderBase]: 12/34 cut-off events. [2023-08-26 16:09:30,203 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:09:30,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 34 events. 12/34 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 86 event pairs, 12 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 63. Up to 34 conditions per place. [2023-08-26 16:09:30,204 INFO L140 encePairwiseOnDemand]: 145/150 looper letters, 7 selfloop transitions, 0 changer transitions 2/10 dead transitions. [2023-08-26 16:09:30,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 10 transitions, 41 flow [2023-08-26 16:09:30,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 16:09:30,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 16:09:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 140 transitions. [2023-08-26 16:09:30,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-26 16:09:30,216 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 140 transitions. [2023-08-26 16:09:30,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 140 transitions. [2023-08-26 16:09:30,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:09:30,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 140 transitions. [2023-08-26 16:09:30,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 70.0) internal successors, (140), 2 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,225 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,227 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 37 flow. Second operand 2 states and 140 transitions. [2023-08-26 16:09:30,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 10 transitions, 41 flow [2023-08-26 16:09:30,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:09:30,231 INFO L231 Difference]: Finished difference. Result has 14 places, 8 transitions, 18 flow [2023-08-26 16:09:30,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=22, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=18, PETRI_PLACES=14, PETRI_TRANSITIONS=8} [2023-08-26 16:09:30,235 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -5 predicate places. [2023-08-26 16:09:30,235 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 8 transitions, 18 flow [2023-08-26 16:09:30,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 63.5) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:09:30,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:09:30,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:09:30,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 16:09:30,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:09:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash 271497064, now seen corresponding path program 1 times [2023-08-26 16:09:30,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:09:30,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339440485] [2023-08-26 16:09:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:09:30,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:09:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:09:30,439 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 16:09:30,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:09:30,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339440485] [2023-08-26 16:09:30,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339440485] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:09:30,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:09:30,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 16:09:30,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791465027] [2023-08-26 16:09:30,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:09:30,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:09:30,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:09:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:09:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:09:30,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 150 [2023-08-26 16:09:30,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 8 transitions, 18 flow. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:09:30,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 150 [2023-08-26 16:09:30,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:09:30,471 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-08-26 16:09:30,472 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:09:30,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 23 events. 6/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 4 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 48. Up to 18 conditions per place. [2023-08-26 16:09:30,472 INFO L140 encePairwiseOnDemand]: 147/150 looper letters, 7 selfloop transitions, 2 changer transitions 2/11 dead transitions. [2023-08-26 16:09:30,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 11 transitions, 46 flow [2023-08-26 16:09:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:09:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:09:30,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 177 transitions. [2023-08-26 16:09:30,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2023-08-26 16:09:30,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 177 transitions. [2023-08-26 16:09:30,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 177 transitions. [2023-08-26 16:09:30,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:09:30,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 177 transitions. [2023-08-26 16:09:30,481 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 16:09:30,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,483 INFO L175 Difference]: Start difference. First operand has 14 places, 8 transitions, 18 flow. Second operand 3 states and 177 transitions. [2023-08-26 16:09:30,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 11 transitions, 46 flow [2023-08-26 16:09:30,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:09:30,484 INFO L231 Difference]: Finished difference. Result has 15 places, 8 transitions, 26 flow [2023-08-26 16:09:30,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=15, PETRI_TRANSITIONS=8} [2023-08-26 16:09:30,485 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -4 predicate places. [2023-08-26 16:09:30,485 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 8 transitions, 26 flow [2023-08-26 16:09:30,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:09:30,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:09:30,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:09:30,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 16:09:30,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:09:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1083124812, now seen corresponding path program 1 times [2023-08-26 16:09:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:09:30,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921160251] [2023-08-26 16:09:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:09:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:09:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:09:30,600 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 16:09:30,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:09:30,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921160251] [2023-08-26 16:09:30,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921160251] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:09:30,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:09:30,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 16:09:30,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763394727] [2023-08-26 16:09:30,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:09:30,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:09:30,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:09:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:09:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:09:30,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 150 [2023-08-26 16:09:30,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 8 transitions, 26 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:09:30,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 150 [2023-08-26 16:09:30,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:09:30,616 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-26 16:09:30,616 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 16:09:30,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17 conditions, 5 events. 0/5 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 2 event pairs, 0 based on Foata normal form. 2/7 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-26 16:09:30,617 INFO L140 encePairwiseOnDemand]: 148/150 looper letters, 0 selfloop transitions, 0 changer transitions 5/5 dead transitions. [2023-08-26 16:09:30,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 5 transitions, 23 flow [2023-08-26 16:09:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:09:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:09:30,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 165 transitions. [2023-08-26 16:09:30,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2023-08-26 16:09:30,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 165 transitions. [2023-08-26 16:09:30,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 165 transitions. [2023-08-26 16:09:30,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:09:30,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 165 transitions. [2023-08-26 16:09:30,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,622 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 150.0) internal successors, (600), 4 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,622 INFO L175 Difference]: Start difference. First operand has 15 places, 8 transitions, 26 flow. Second operand 3 states and 165 transitions. [2023-08-26 16:09:30,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 5 transitions, 23 flow [2023-08-26 16:09:30,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 5 transitions, 21 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 16:09:30,623 INFO L231 Difference]: Finished difference. Result has 12 places, 0 transitions, 0 flow [2023-08-26 16:09:30,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=150, PETRI_DIFFERENCE_MINUEND_FLOW=13, PETRI_DIFFERENCE_MINUEND_PLACES=10, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=12, PETRI_TRANSITIONS=0} [2023-08-26 16:09:30,624 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -7 predicate places. [2023-08-26 16:09:30,624 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 0 transitions, 0 flow [2023-08-26 16:09:30,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:09:30,626 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2023-08-26 16:09:30,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 6 remaining) [2023-08-26 16:09:30,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2023-08-26 16:09:30,627 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2023-08-26 16:09:30,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-26 16:09:30,628 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-26 16:09:30,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:09:30,628 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 16:09:30,632 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 16:09:30,636 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 16:09:30,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:09:30 BasicIcfg [2023-08-26 16:09:30,641 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 16:09:30,645 INFO L158 Benchmark]: Toolchain (without parser) took 3514.20ms. Allocated memory was 346.0MB in the beginning and 459.3MB in the end (delta: 113.2MB). Free memory was 321.2MB in the beginning and 337.1MB in the end (delta: -15.9MB). Peak memory consumption was 98.8MB. Max. memory is 16.0GB. [2023-08-26 16:09:30,645 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 346.0MB. Free memory was 322.2MB in the beginning and 322.0MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:09:30,646 INFO L158 Benchmark]: CACSL2BoogieTranslator took 369.79ms. Allocated memory is still 346.0MB. Free memory was 321.2MB in the beginning and 302.2MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 16:09:30,646 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.82ms. Allocated memory is still 346.0MB. Free memory was 302.2MB in the beginning and 300.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 16:09:30,646 INFO L158 Benchmark]: Boogie Preprocessor took 31.16ms. Allocated memory is still 346.0MB. Free memory was 300.2MB in the beginning and 298.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:09:30,647 INFO L158 Benchmark]: RCFGBuilder took 356.43ms. Allocated memory is still 346.0MB. Free memory was 298.7MB in the beginning and 286.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 16:09:30,649 INFO L158 Benchmark]: TraceAbstraction took 2688.26ms. Allocated memory was 346.0MB in the beginning and 459.3MB in the end (delta: 113.2MB). Free memory was 285.5MB in the beginning and 337.1MB in the end (delta: -51.6MB). Peak memory consumption was 63.2MB. Max. memory is 16.0GB. [2023-08-26 16:09:30,656 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 346.0MB. Free memory was 322.2MB in the beginning and 322.0MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 369.79ms. Allocated memory is still 346.0MB. Free memory was 321.2MB in the beginning and 302.2MB in the end (delta: 19.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 62.82ms. Allocated memory is still 346.0MB. Free memory was 302.2MB in the beginning and 300.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.16ms. Allocated memory is still 346.0MB. Free memory was 300.2MB in the beginning and 298.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 356.43ms. Allocated memory is still 346.0MB. Free memory was 298.7MB in the beginning and 286.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 2688.26ms. Allocated memory was 346.0MB in the beginning and 459.3MB in the end (delta: 113.2MB). Free memory was 285.5MB in the beginning and 337.1MB in the end (delta: -51.6MB). Peak memory consumption was 63.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 69 PlacesBefore, 19 PlacesAfterwards, 69 TransitionsBefore, 17 TransitionsAfterwards, 912 CoEnabledTransitionPairs, 6 FixpointIterations, 28 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 2 ChoiceCompositions, 80 TotalNumberOfCompositions, 1600 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1037, independent: 933, independent conditional: 0, independent unconditional: 933, dependent: 104, dependent conditional: 0, dependent unconditional: 104, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 540, independent: 516, independent conditional: 0, independent unconditional: 516, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1037, independent: 417, independent conditional: 0, independent unconditional: 417, dependent: 80, dependent conditional: 0, dependent unconditional: 80, unknown: 540, unknown conditional: 0, unknown unconditional: 540] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, 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: 18]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 86 locations, 6 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: 2.6s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33 IncrementalHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 33 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred 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, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 18 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 16:09:30,676 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...