/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:54:28,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:54:28,096 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 17:54:28,104 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:54:28,105 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:54:28,138 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:54:28,139 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:54:28,139 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:54:28,140 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:54:28,140 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:54:28,141 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:54:28,141 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:54:28,141 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:54:28,142 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:54:28,142 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:54:28,142 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:54:28,143 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:54:28,143 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:54:28,143 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:54:28,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:54:28,144 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:54:28,146 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:54:28,146 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:54:28,147 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:54:28,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:54:28,147 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:54:28,147 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:54:28,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:54:28,148 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:54:28,148 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:54:28,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:54:28,149 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:54:28,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:54:28,150 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:54:28,150 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:54:28,150 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:54:28,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:54:28,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:54:28,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:54:28,497 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:54:28,498 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:54:28,499 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-26 17:54:29,645 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:54:29,916 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:54:29,917 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/28_buggy_simple_loop1_vf.i [2023-08-26 17:54:29,931 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29c5e9d74/003b8d5e3aa34449992d5e977b9ac243/FLAGf186db3f2 [2023-08-26 17:54:29,947 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/29c5e9d74/003b8d5e3aa34449992d5e977b9ac243 [2023-08-26 17:54:29,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:54:29,953 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:54:29,954 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:54:29,954 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:54:29,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:54:29,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:54:29" (1/1) ... [2023-08-26 17:54:29,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20ef656a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:29, skipping insertion in model container [2023-08-26 17:54:29,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:54:29" (1/1) ... [2023-08-26 17:54:29,998 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:54:30,310 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:54:30,319 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:54:30,349 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-26 17:54:30,350 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-26 17:54:30,364 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:54:30,399 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:54:30,399 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30 WrapperNode [2023-08-26 17:54:30,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:54:30,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:54:30,401 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:54:30,401 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:54:30,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,456 INFO L138 Inliner]: procedures = 167, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-08-26 17:54:30,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:54:30,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:54:30,458 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:54:30,458 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:54:30,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,473 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,484 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,489 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,493 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,494 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,496 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:54:30,497 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:54:30,497 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:54:30,497 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:54:30,497 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (1/1) ... [2023-08-26 17:54:30,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:54:30,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:54:30,529 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 17:54:30,554 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 17:54:30,571 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 17:54:30,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 17:54:30,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:54:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:54:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:54:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:54:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:54:30,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:54:30,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:54:30,574 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 17:54:30,700 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:54:30,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:54:30,819 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:54:30,824 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:54:30,824 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-26 17:54:30,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:54:30 BoogieIcfgContainer [2023-08-26 17:54:30,826 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:54:30,828 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:54:30,828 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:54:30,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:54:30,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:54:29" (1/3) ... [2023-08-26 17:54:30,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de25d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:54:30, skipping insertion in model container [2023-08-26 17:54:30,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:54:30" (2/3) ... [2023-08-26 17:54:30,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de25d0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:54:30, skipping insertion in model container [2023-08-26 17:54:30,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:54:30" (3/3) ... [2023-08-26 17:54:30,833 INFO L112 eAbstractionObserver]: Analyzing ICFG 28_buggy_simple_loop1_vf.i [2023-08-26 17:54:30,846 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:54:30,846 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-26 17:54:30,846 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:54:30,911 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 17:54:30,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 73 transitions, 151 flow [2023-08-26 17:54:30,969 INFO L124 PetriNetUnfolderBase]: 11/85 cut-off events. [2023-08-26 17:54:30,970 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:54:30,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 11/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2023-08-26 17:54:30,975 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 73 transitions, 151 flow [2023-08-26 17:54:30,979 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 73 transitions, 151 flow [2023-08-26 17:54:30,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:54:31,005 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 66 places, 73 transitions, 151 flow [2023-08-26 17:54:31,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 66 places, 73 transitions, 151 flow [2023-08-26 17:54:31,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 73 transitions, 151 flow [2023-08-26 17:54:31,024 INFO L124 PetriNetUnfolderBase]: 11/85 cut-off events. [2023-08-26 17:54:31,025 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:54:31,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 85 events. 11/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 127 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 61. Up to 4 conditions per place. [2023-08-26 17:54:31,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 1410 [2023-08-26 17:54:32,685 INFO L134 LiptonReduction]: Checked pairs total: 1109 [2023-08-26 17:54:32,686 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-26 17:54:32,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:54:32,705 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;@34813948, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:54:32,705 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-26 17:54:32,707 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:54:32,707 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 17:54:32,707 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:54:32,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:32,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 17:54:32,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-08-26 17:54:32,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:32,713 INFO L85 PathProgramCache]: Analyzing trace with hash 10682, now seen corresponding path program 1 times [2023-08-26 17:54:32,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:32,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180953777] [2023-08-26 17:54:32,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:32,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:32,914 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 17:54:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180953777] [2023-08-26 17:54:32,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180953777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:32,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:54:32,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83195840] [2023-08-26 17:54:32,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:32,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:32,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:32,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:32,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 138 [2023-08-26 17:54:32,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 19 transitions, 43 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:32,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:32,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 138 [2023-08-26 17:54:32,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:33,011 INFO L124 PetriNetUnfolderBase]: 34/67 cut-off events. [2023-08-26 17:54:33,012 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:54:33,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 67 events. 34/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 174 event pairs, 18 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 122. Up to 65 conditions per place. [2023-08-26 17:54:33,015 INFO L140 encePairwiseOnDemand]: 134/138 looper letters, 14 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 17:54:33,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 16 transitions, 67 flow [2023-08-26 17:54:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:33,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:33,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2023-08-26 17:54:33,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2023-08-26 17:54:33,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2023-08-26 17:54:33,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2023-08-26 17:54:33,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:33,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2023-08-26 17:54:33,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,046 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,049 INFO L175 Difference]: Start difference. First operand has 17 places, 19 transitions, 43 flow. Second operand 3 states and 180 transitions. [2023-08-26 17:54:33,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 16 transitions, 67 flow [2023-08-26 17:54:33,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 16 transitions, 67 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:54:33,053 INFO L231 Difference]: Finished difference. Result has 17 places, 16 transitions, 39 flow [2023-08-26 17:54:33,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=17, PETRI_TRANSITIONS=16} [2023-08-26 17:54:33,060 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2023-08-26 17:54:33,060 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 16 transitions, 39 flow [2023-08-26 17:54:33,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:33,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 17:54:33,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:54:33,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-08-26 17:54:33,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:33,063 INFO L85 PathProgramCache]: Analyzing trace with hash 10683, now seen corresponding path program 1 times [2023-08-26 17:54:33,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:33,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429631272] [2023-08-26 17:54:33,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:33,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:33,158 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 17:54:33,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:33,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429631272] [2023-08-26 17:54:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429631272] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:54:33,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:54:33,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:54:33,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480364609] [2023-08-26 17:54:33,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:54:33,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:54:33,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:33,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:54:33,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:54:33,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 138 [2023-08-26 17:54:33,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 16 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:33,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 138 [2023-08-26 17:54:33,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:54:33,188 INFO L124 PetriNetUnfolderBase]: 24/49 cut-off events. [2023-08-26 17:54:33,188 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:54:33,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 49 events. 24/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 115 event pairs, 12 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 98. Up to 47 conditions per place. [2023-08-26 17:54:33,189 INFO L140 encePairwiseOnDemand]: 136/138 looper letters, 12 selfloop transitions, 1 changer transitions 1/15 dead transitions. [2023-08-26 17:54:33,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 15 transitions, 65 flow [2023-08-26 17:54:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:54:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:54:33,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2023-08-26 17:54:33,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2023-08-26 17:54:33,191 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 180 transitions. [2023-08-26 17:54:33,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 180 transitions. [2023-08-26 17:54:33,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:54:33,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 180 transitions. [2023-08-26 17:54:33,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,194 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 138.0) internal successors, (552), 4 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,194 INFO L175 Difference]: Start difference. First operand has 17 places, 16 transitions, 39 flow. Second operand 3 states and 180 transitions. [2023-08-26 17:54:33,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 15 transitions, 65 flow [2023-08-26 17:54:33,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:54:33,195 INFO L231 Difference]: Finished difference. Result has 17 places, 14 transitions, 36 flow [2023-08-26 17:54:33,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=138, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=17, PETRI_TRANSITIONS=14} [2023-08-26 17:54:33,196 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 0 predicate places. [2023-08-26 17:54:33,197 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 14 transitions, 36 flow [2023-08-26 17:54:33,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:33,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:33,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 17:54:33,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:54:33,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err0ASSERT_VIOLATIONASSERT, thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE] === [2023-08-26 17:54:33,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1281645359, now seen corresponding path program 1 times [2023-08-26 17:54:33,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:33,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830818236] [2023-08-26 17:54:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:33,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 17:54:33,228 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 17:54:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 17:54:33,266 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 17:54:33,266 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 17:54:33,267 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2023-08-26 17:54:33,268 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 4 remaining) [2023-08-26 17:54:33,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2023-08-26 17:54:33,269 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 4 remaining) [2023-08-26 17:54:33,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:54:33,270 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 17:54:33,271 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-26 17:54:33,275 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:54:33,275 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:54:33,291 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:54:33 BasicIcfg [2023-08-26 17:54:33,292 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:54:33,292 INFO L158 Benchmark]: Toolchain (without parser) took 3338.84ms. Allocated memory was 385.9MB in the beginning and 465.6MB in the end (delta: 79.7MB). Free memory was 360.7MB in the beginning and 383.2MB in the end (delta: -22.5MB). Peak memory consumption was 59.0MB. Max. memory is 16.0GB. [2023-08-26 17:54:33,293 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 385.9MB. Free memory was 361.8MB in the beginning and 361.8MB in the end (delta: 75.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:54:33,293 INFO L158 Benchmark]: CACSL2BoogieTranslator took 445.35ms. Allocated memory is still 385.9MB. Free memory was 360.4MB in the beginning and 341.3MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 17:54:33,294 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.26ms. Allocated memory is still 385.9MB. Free memory was 341.3MB in the beginning and 339.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:54:33,294 INFO L158 Benchmark]: Boogie Preprocessor took 38.39ms. Allocated memory is still 385.9MB. Free memory was 339.2MB in the beginning and 337.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:54:33,295 INFO L158 Benchmark]: RCFGBuilder took 329.43ms. Allocated memory is still 385.9MB. Free memory was 337.8MB in the beginning and 324.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 17:54:33,295 INFO L158 Benchmark]: TraceAbstraction took 2463.86ms. Allocated memory was 385.9MB in the beginning and 465.6MB in the end (delta: 79.7MB). Free memory was 324.1MB in the beginning and 383.2MB in the end (delta: -59.1MB). Peak memory consumption was 23.4MB. Max. memory is 16.0GB. [2023-08-26 17:54:33,297 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 385.9MB. Free memory was 361.8MB in the beginning and 361.8MB in the end (delta: 75.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 445.35ms. Allocated memory is still 385.9MB. Free memory was 360.4MB in the beginning and 341.3MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.26ms. Allocated memory is still 385.9MB. Free memory was 341.3MB in the beginning and 339.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.39ms. Allocated memory is still 385.9MB. Free memory was 339.2MB in the beginning and 337.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 329.43ms. Allocated memory is still 385.9MB. Free memory was 337.8MB in the beginning and 324.7MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 2463.86ms. Allocated memory was 385.9MB in the beginning and 465.6MB in the end (delta: 79.7MB). Free memory was 324.1MB in the beginning and 383.2MB in the end (delta: -59.1MB). Peak memory consumption was 23.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 250]: Unsoundness Warning unspecified type, defaulting to int C: short [250] - GenericResultAtLocation [Line: 250]: Unsoundness Warning unspecified type, defaulting to int C: short [250] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 66 PlacesBefore, 17 PlacesAfterwards, 73 TransitionsBefore, 19 TransitionsAfterwards, 1410 CoEnabledTransitionPairs, 5 FixpointIterations, 9 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 5 ChoiceCompositions, 65 TotalNumberOfCompositions, 1109 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1109, independent: 1109, independent conditional: 0, independent unconditional: 1109, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 677, independent: 677, independent conditional: 0, independent unconditional: 677, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1109, independent: 432, independent conditional: 0, independent unconditional: 432, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 677, unknown conditional: 0, unknown unconditional: 677] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 12]: assertion can be violated assertion can be violated We found a FailurePath: [L700] 0 pthread_t t; VAL [t={3:0}] [L701] COND TRUE 0 1 [L703] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [pthread_create(&t, 0, thr1, 0)=-1, t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i