/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 03:50:02,408 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 03:50:02,477 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 03:50:02,483 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 03:50:02,483 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 03:50:02,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 03:50:02,484 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 03:50:02,517 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 03:50:02,518 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 03:50:02,521 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 03:50:02,522 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 03:50:02,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 03:50:02,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 03:50:02,524 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 03:50:02,525 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 03:50:02,525 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 03:50:02,525 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 03:50:02,525 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 03:50:02,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 03:50:02,526 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 03:50:02,526 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 03:50:02,526 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 03:50:02,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 03:50:02,527 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 03:50:02,527 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 03:50:02,527 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 03:50:02,527 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 03:50:02,528 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 03:50:02,528 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 03:50:02,528 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 03:50:02,529 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:50:02,529 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 03:50:02,530 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 03:50:02,530 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 03:50:02,530 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 03:50:02,531 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 03:50:02,531 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 03:50:02,531 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 03:50:02,531 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 03:50:02,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 03:50:02,532 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 03:50:02,532 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 03:50:02,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 03:50:02,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 03:50:02,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 03:50:02,787 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 03:50:02,788 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 03:50:02,789 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i [2023-08-04 03:50:03,899 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 03:50:04,198 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 03:50:04,199 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i [2023-08-04 03:50:04,211 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ace07a1/44a031097bd14e32bfb3a4f3435f9acc/FLAGd672d16e8 [2023-08-04 03:50:04,470 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ace07a1/44a031097bd14e32bfb3a4f3435f9acc [2023-08-04 03:50:04,472 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 03:50:04,490 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 03:50:04,491 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 03:50:04,491 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 03:50:04,494 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 03:50:04,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@272f4129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04, skipping insertion in model container [2023-08-04 03:50:04,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,538 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 03:50:04,783 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i[30176,30189] [2023-08-04 03:50:04,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:50:04,818 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 03:50:04,837 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-04 03:50:04,847 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-04 03:50:04,857 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i[30176,30189] [2023-08-04 03:50:04,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 03:50:04,894 INFO L206 MainTranslator]: Completed translation [2023-08-04 03:50:04,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04 WrapperNode [2023-08-04 03:50:04,894 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 03:50:04,895 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 03:50:04,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 03:50:04,895 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 03:50:04,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,948 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-04 03:50:04,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 03:50:04,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 03:50:04,949 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 03:50:04,949 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 03:50:04,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,960 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,960 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,965 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,969 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,970 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,971 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,973 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 03:50:04,974 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 03:50:04,974 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 03:50:04,974 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 03:50:04,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (1/1) ... [2023-08-04 03:50:04,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 03:50:04,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:05,002 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) [2023-08-04 03:50:05,010 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 [2023-08-04 03:50:05,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 03:50:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 03:50:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 03:50:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 03:50:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 03:50:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-04 03:50:05,038 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-04 03:50:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 03:50:05,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 03:50:05,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 03:50:05,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 03:50:05,040 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 03:50:05,142 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 03:50:05,144 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 03:50:05,294 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 03:50:05,301 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 03:50:05,301 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 03:50:05,303 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:50:05 BoogieIcfgContainer [2023-08-04 03:50:05,303 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 03:50:05,306 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 03:50:05,306 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 03:50:05,309 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 03:50:05,309 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 03:50:04" (1/3) ... [2023-08-04 03:50:05,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3150ba0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:50:05, skipping insertion in model container [2023-08-04 03:50:05,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 03:50:04" (2/3) ... [2023-08-04 03:50:05,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3150ba0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 03:50:05, skipping insertion in model container [2023-08-04 03:50:05,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 03:50:05" (3/3) ... [2023-08-04 03:50:05,311 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i [2023-08-04 03:50:05,318 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 03:50:05,326 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 03:50:05,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 03:50:05,327 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 03:50:05,403 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-04 03:50:05,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 114 transitions, 236 flow [2023-08-04 03:50:05,495 INFO L124 PetriNetUnfolderBase]: 18/147 cut-off events. [2023-08-04 03:50:05,496 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:50:05,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 18/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-04 03:50:05,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 114 transitions, 236 flow [2023-08-04 03:50:05,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 223 flow [2023-08-04 03:50:05,509 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:50:05,517 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-04 03:50:05,519 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-04 03:50:05,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 223 flow [2023-08-04 03:50:05,557 INFO L124 PetriNetUnfolderBase]: 17/142 cut-off events. [2023-08-04 03:50:05,557 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:05,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 17/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-04 03:50:05,560 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-04 03:50:09,172 INFO L134 LiptonReduction]: Checked pairs total: 3935 [2023-08-04 03:50:09,172 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 03:50:09,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:50:09,190 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=true, 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;@5b94019f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:50:09,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:50:09,193 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:50:09,193 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-04 03:50:09,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:09,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:09,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 03:50:09,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:09,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash 13523618, now seen corresponding path program 1 times [2023-08-04 03:50:09,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:09,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214717184] [2023-08-04 03:50:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:09,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:09,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:09,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214717184] [2023-08-04 03:50:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214717184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:50:09,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:50:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 03:50:09,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592155348] [2023-08-04 03:50:09,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:50:09,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:50:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:09,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:50:09,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:50:09,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 210 [2023-08-04 03:50:09,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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) [2023-08-04 03:50:09,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:09,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 210 [2023-08-04 03:50:09,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:09,593 INFO L124 PetriNetUnfolderBase]: 69/171 cut-off events. [2023-08-04 03:50:09,593 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:09,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 341 conditions, 171 events. 69/171 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 548 event pairs, 21 based on Foata normal form. 9/163 useless extension candidates. Maximal degree in co-relation 316. Up to 114 conditions per place. [2023-08-04 03:50:09,596 INFO L140 encePairwiseOnDemand]: 197/210 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-08-04 03:50:09,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 29 transitions, 117 flow [2023-08-04 03:50:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:50:09,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:50:09,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-04 03:50:09,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2023-08-04 03:50:09,618 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-04 03:50:09,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-04 03:50:09,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:09,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-04 03:50:09,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 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) [2023-08-04 03:50:09,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-04 03:50:09,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 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) [2023-08-04 03:50:09,638 INFO L175 Difference]: Start difference. First operand has 26 places, 32 transitions, 69 flow. Second operand 3 states and 333 transitions. [2023-08-04 03:50:09,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 29 transitions, 117 flow [2023-08-04 03:50:09,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 29 transitions, 117 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:50:09,641 INFO L231 Difference]: Finished difference. Result has 27 places, 16 transitions, 43 flow [2023-08-04 03:50:09,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=27, PETRI_TRANSITIONS=16} [2023-08-04 03:50:09,647 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 1 predicate places. [2023-08-04 03:50:09,647 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 16 transitions, 43 flow [2023-08-04 03:50:09,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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) [2023-08-04 03:50:09,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:09,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:09,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 03:50:09,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:09,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1336112677, now seen corresponding path program 1 times [2023-08-04 03:50:09,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:09,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548656554] [2023-08-04 03:50:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:09,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:09,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:09,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548656554] [2023-08-04 03:50:09,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548656554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308369168] [2023-08-04 03:50:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:09,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:09,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:09,782 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:09,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 03:50:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:09,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:50:09,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:10,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:10,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308369168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:10,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:10,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:50:10,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236045033] [2023-08-04 03:50:10,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:10,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:50:10,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:50:10,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:50:10,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 210 [2023-08-04 03:50:10,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 16 transitions, 43 flow. Second operand has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 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) [2023-08-04 03:50:10,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:10,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 210 [2023-08-04 03:50:10,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:10,107 INFO L124 PetriNetUnfolderBase]: 16/46 cut-off events. [2023-08-04 03:50:10,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:10,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 46 events. 16/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 66 event pairs, 7 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 91. Up to 34 conditions per place. [2023-08-04 03:50:10,108 INFO L140 encePairwiseOnDemand]: 207/210 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-04 03:50:10,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 22 transitions, 98 flow [2023-08-04 03:50:10,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:50:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:50:10,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 403 transitions. [2023-08-04 03:50:10,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797619047619048 [2023-08-04 03:50:10,114 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 403 transitions. [2023-08-04 03:50:10,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 403 transitions. [2023-08-04 03:50:10,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:10,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 403 transitions. [2023-08-04 03:50:10,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 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) [2023-08-04 03:50:10,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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) [2023-08-04 03:50:10,123 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 210.0) internal successors, (1050), 5 states have internal predecessors, (1050), 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) [2023-08-04 03:50:10,123 INFO L175 Difference]: Start difference. First operand has 27 places, 16 transitions, 43 flow. Second operand 4 states and 403 transitions. [2023-08-04 03:50:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 22 transitions, 98 flow [2023-08-04 03:50:10,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 22 transitions, 89 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 03:50:10,124 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 03:50:10,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=210, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 03:50:10,125 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -7 predicate places. [2023-08-04 03:50:10,125 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 03:50:10,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.8) internal successors, (489), 5 states have internal predecessors, (489), 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) [2023-08-04 03:50:10,128 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 03:50:10,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 03:50:10,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:10,334 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 03:50:10,336 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 03:50:10,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 114 transitions, 236 flow [2023-08-04 03:50:10,367 INFO L124 PetriNetUnfolderBase]: 18/147 cut-off events. [2023-08-04 03:50:10,367 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 03:50:10,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 18/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-04 03:50:10,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 114 transitions, 236 flow [2023-08-04 03:50:10,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 223 flow [2023-08-04 03:50:10,372 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:50:10,372 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-04 03:50:10,372 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-04 03:50:10,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 223 flow [2023-08-04 03:50:10,386 INFO L124 PetriNetUnfolderBase]: 17/142 cut-off events. [2023-08-04 03:50:10,387 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:10,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 17/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-04 03:50:10,389 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-04 03:50:14,681 INFO L134 LiptonReduction]: Checked pairs total: 3950 [2023-08-04 03:50:14,681 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 03:50:14,683 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 03:50:14,684 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=true, 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;@5b94019f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:50:14,684 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:50:14,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:50:14,687 INFO L124 PetriNetUnfolderBase]: 2/23 cut-off events. [2023-08-04 03:50:14,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:14,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:14,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 03:50:14,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 03:50:14,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1200534038, now seen corresponding path program 1 times [2023-08-04 03:50:14,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:14,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874324074] [2023-08-04 03:50:14,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:14,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:50:14,717 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:50:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:50:14,743 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:50:14,744 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:50:14,744 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 03:50:14,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 03:50:14,744 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 03:50:14,745 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 03:50:14,745 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 03:50:14,745 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 03:50:14,758 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-04 03:50:14,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-04 03:50:14,779 INFO L124 PetriNetUnfolderBase]: 32/234 cut-off events. [2023-08-04 03:50:14,779 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:50:14,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-04 03:50:14,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 306 flow [2023-08-04 03:50:14,781 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 306 flow [2023-08-04 03:50:14,782 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 03:50:14,782 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-04 03:50:14,782 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-04 03:50:14,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-04 03:50:14,800 INFO L124 PetriNetUnfolderBase]: 32/234 cut-off events. [2023-08-04 03:50:14,800 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 03:50:14,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-04 03:50:14,805 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-04 03:50:18,073 INFO L134 LiptonReduction]: Checked pairs total: 16839 [2023-08-04 03:50:18,073 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-04 03:50:18,075 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 03:50:18,076 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@5b94019f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 03:50:18,076 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 03:50:18,078 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 03:50:18,078 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-04 03:50:18,078 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 03:50:18,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:18,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 03:50:18,078 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:18,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:18,079 INFO L85 PathProgramCache]: Analyzing trace with hash 25344275, now seen corresponding path program 1 times [2023-08-04 03:50:18,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:18,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653409771] [2023-08-04 03:50:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:18,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:18,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653409771] [2023-08-04 03:50:18,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653409771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:50:18,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:50:18,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 03:50:18,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107915360] [2023-08-04 03:50:18,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:50:18,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 03:50:18,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:18,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 03:50:18,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 03:50:18,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 253 [2023-08-04 03:50:18,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-08-04 03:50:18,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:18,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 253 [2023-08-04 03:50:18,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:18,367 INFO L124 PetriNetUnfolderBase]: 1627/2909 cut-off events. [2023-08-04 03:50:18,367 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-04 03:50:18,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5640 conditions, 2909 events. 1627/2909 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 16618 event pairs, 562 based on Foata normal form. 522/3143 useless extension candidates. Maximal degree in co-relation 3944. Up to 2412 conditions per place. [2023-08-04 03:50:18,376 INFO L140 encePairwiseOnDemand]: 235/253 looper letters, 32 selfloop transitions, 3 changer transitions 15/57 dead transitions. [2023-08-04 03:50:18,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 233 flow [2023-08-04 03:50:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 03:50:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 03:50:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 420 transitions. [2023-08-04 03:50:18,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533596837944664 [2023-08-04 03:50:18,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 420 transitions. [2023-08-04 03:50:18,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 420 transitions. [2023-08-04 03:50:18,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:18,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 420 transitions. [2023-08-04 03:50:18,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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) [2023-08-04 03:50:18,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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) [2023-08-04 03:50:18,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 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) [2023-08-04 03:50:18,386 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 420 transitions. [2023-08-04 03:50:18,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 233 flow [2023-08-04 03:50:18,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:50:18,388 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 89 flow [2023-08-04 03:50:18,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-04 03:50:18,389 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 03:50:18,389 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 89 flow [2023-08-04 03:50:18,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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) [2023-08-04 03:50:18,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:18,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:18,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 03:50:18,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:18,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1454053430, now seen corresponding path program 1 times [2023-08-04 03:50:18,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:18,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116736370] [2023-08-04 03:50:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:18,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:18,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:18,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116736370] [2023-08-04 03:50:18,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116736370] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 03:50:18,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474824369] [2023-08-04 03:50:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:18,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:18,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 03:50:18,497 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 03:50:18,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 03:50:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:18,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 03:50:18,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 03:50:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:18,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 03:50:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 03:50:18,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474824369] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 03:50:18,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 03:50:18,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 03:50:18,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121292351] [2023-08-04 03:50:18,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 03:50:18,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:50:18,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:18,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:50:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:50:18,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 253 [2023-08-04 03:50:18,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 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) [2023-08-04 03:50:18,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:18,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 253 [2023-08-04 03:50:18,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:18,806 INFO L124 PetriNetUnfolderBase]: 641/1129 cut-off events. [2023-08-04 03:50:18,806 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-04 03:50:18,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2356 conditions, 1129 events. 641/1129 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5931 event pairs, 62 based on Foata normal form. 0/1059 useless extension candidates. Maximal degree in co-relation 1544. Up to 722 conditions per place. [2023-08-04 03:50:18,811 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 43 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-04 03:50:18,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 57 transitions, 236 flow [2023-08-04 03:50:18,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:50:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:50:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2023-08-04 03:50:18,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508893280632411 [2023-08-04 03:50:18,814 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2023-08-04 03:50:18,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2023-08-04 03:50:18,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:18,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2023-08-04 03:50:18,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 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) [2023-08-04 03:50:18,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 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) [2023-08-04 03:50:18,818 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 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) [2023-08-04 03:50:18,818 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 89 flow. Second operand 4 states and 515 transitions. [2023-08-04 03:50:18,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 57 transitions, 236 flow [2023-08-04 03:50:18,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 57 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 03:50:18,820 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 112 flow [2023-08-04 03:50:18,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-08-04 03:50:18,821 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2023-08-04 03:50:18,821 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 112 flow [2023-08-04 03:50:18,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.6) internal successors, (598), 5 states have internal predecessors, (598), 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) [2023-08-04 03:50:18,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:18,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:18,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 03:50:19,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 03:50:19,026 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:19,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:19,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1378890021, now seen corresponding path program 1 times [2023-08-04 03:50:19,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:19,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691157756] [2023-08-04 03:50:19,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:19,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 03:50:19,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 03:50:19,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 03:50:19,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691157756] [2023-08-04 03:50:19,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691157756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 03:50:19,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 03:50:19,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 03:50:19,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775112711] [2023-08-04 03:50:19,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 03:50:19,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 03:50:19,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 03:50:19,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 03:50:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 03:50:19,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 253 [2023-08-04 03:50:19,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 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) [2023-08-04 03:50:19,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 03:50:19,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 253 [2023-08-04 03:50:19,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 03:50:19,392 INFO L124 PetriNetUnfolderBase]: 453/960 cut-off events. [2023-08-04 03:50:19,392 INFO L125 PetriNetUnfolderBase]: For 763/763 co-relation queries the response was YES. [2023-08-04 03:50:19,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2463 conditions, 960 events. 453/960 cut-off events. For 763/763 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4930 event pairs, 194 based on Foata normal form. 153/1110 useless extension candidates. Maximal degree in co-relation 1493. Up to 468 conditions per place. [2023-08-04 03:50:19,397 INFO L140 encePairwiseOnDemand]: 241/253 looper letters, 34 selfloop transitions, 12 changer transitions 2/55 dead transitions. [2023-08-04 03:50:19,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 275 flow [2023-08-04 03:50:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 03:50:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 03:50:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 468 transitions. [2023-08-04 03:50:19,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624505928853755 [2023-08-04 03:50:19,399 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 468 transitions. [2023-08-04 03:50:19,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 468 transitions. [2023-08-04 03:50:19,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 03:50:19,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 468 transitions. [2023-08-04 03:50:19,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.0) internal successors, (468), 4 states have internal predecessors, (468), 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) [2023-08-04 03:50:19,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 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) [2023-08-04 03:50:19,403 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 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) [2023-08-04 03:50:19,403 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 112 flow. Second operand 4 states and 468 transitions. [2023-08-04 03:50:19,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 275 flow [2023-08-04 03:50:19,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 275 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 03:50:19,406 INFO L231 Difference]: Finished difference. Result has 48 places, 40 transitions, 165 flow [2023-08-04 03:50:19,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=48, PETRI_TRANSITIONS=40} [2023-08-04 03:50:19,406 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 03:50:19,406 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 40 transitions, 165 flow [2023-08-04 03:50:19,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.4) internal successors, (537), 5 states have internal predecessors, (537), 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) [2023-08-04 03:50:19,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 03:50:19,407 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 03:50:19,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 03:50:19,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 03:50:19,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 03:50:19,408 INFO L85 PathProgramCache]: Analyzing trace with hash -913910126, now seen corresponding path program 1 times [2023-08-04 03:50:19,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 03:50:19,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143056111] [2023-08-04 03:50:19,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 03:50:19,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 03:50:19,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:50:19,427 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 03:50:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 03:50:19,452 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 03:50:19,453 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 03:50:19,454 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 03:50:19,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 03:50:19,454 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 03:50:19,456 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2023-08-04 03:50:19,457 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 03:50:19,457 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 03:50:19,513 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 03:50:19 BasicIcfg [2023-08-04 03:50:19,513 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 03:50:19,513 INFO L158 Benchmark]: Toolchain (without parser) took 15023.88ms. Allocated memory was 367.0MB in the beginning and 641.7MB in the end (delta: 274.7MB). Free memory was 306.3MB in the beginning and 475.3MB in the end (delta: -168.9MB). Peak memory consumption was 108.2MB. Max. memory is 16.0GB. [2023-08-04 03:50:19,513 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 367.0MB. Free memory is still 320.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 03:50:19,514 INFO L158 Benchmark]: CACSL2BoogieTranslator took 403.68ms. Allocated memory is still 367.0MB. Free memory was 306.1MB in the beginning and 286.1MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 03:50:19,514 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.91ms. Allocated memory was 367.0MB in the beginning and 534.8MB in the end (delta: 167.8MB). Free memory was 286.1MB in the beginning and 505.1MB in the end (delta: -218.9MB). Peak memory consumption was 9.1MB. Max. memory is 16.0GB. [2023-08-04 03:50:19,514 INFO L158 Benchmark]: Boogie Preprocessor took 25.00ms. Allocated memory is still 534.8MB. Free memory was 505.1MB in the beginning and 503.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 03:50:19,514 INFO L158 Benchmark]: RCFGBuilder took 329.28ms. Allocated memory is still 534.8MB. Free memory was 503.3MB in the beginning and 487.7MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 03:50:19,515 INFO L158 Benchmark]: TraceAbstraction took 14207.04ms. Allocated memory was 534.8MB in the beginning and 641.7MB in the end (delta: 107.0MB). Free memory was 487.3MB in the beginning and 475.3MB in the end (delta: 12.0MB). Peak memory consumption was 120.0MB. Max. memory is 16.0GB. [2023-08-04 03:50:19,516 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 367.0MB. Free memory is still 320.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 403.68ms. Allocated memory is still 367.0MB. Free memory was 306.1MB in the beginning and 286.1MB in the end (delta: 19.9MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 52.91ms. Allocated memory was 367.0MB in the beginning and 534.8MB in the end (delta: 167.8MB). Free memory was 286.1MB in the beginning and 505.1MB in the end (delta: -218.9MB). Peak memory consumption was 9.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.00ms. Allocated memory is still 534.8MB. Free memory was 505.1MB in the beginning and 503.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 329.28ms. Allocated memory is still 534.8MB. Free memory was 503.3MB in the beginning and 487.7MB in the end (delta: 15.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 14207.04ms. Allocated memory was 534.8MB in the beginning and 641.7MB in the end (delta: 107.0MB). Free memory was 487.3MB in the beginning and 475.3MB in the end (delta: 12.0MB). Peak memory consumption was 120.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 100 PlacesBefore, 26 PlacesAfterwards, 109 TransitionsBefore, 32 TransitionsAfterwards, 2184 CoEnabledTransitionPairs, 7 FixpointIterations, 40 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 96 TotalNumberOfCompositions, 3935 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2281, independent: 2148, independent conditional: 0, independent unconditional: 2148, dependent: 133, dependent conditional: 0, dependent unconditional: 133, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1149, independent: 1122, independent conditional: 0, independent unconditional: 1122, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2281, independent: 1026, independent conditional: 0, independent unconditional: 1026, dependent: 106, dependent conditional: 0, dependent unconditional: 106, unknown: 1149, unknown conditional: 0, unknown unconditional: 1149] , Statistics on independence cache: Total cache size (in pairs): 80, Positive cache size: 64, Positive conditional cache size: 0, Positive unconditional cache size: 64, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 100 PlacesBefore, 25 PlacesAfterwards, 109 TransitionsBefore, 30 TransitionsAfterwards, 2184 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 9 ConcurrentYvCompositions, 4 ChoiceCompositions, 101 TotalNumberOfCompositions, 3950 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2526, independent: 2384, independent conditional: 0, independent unconditional: 2384, dependent: 142, dependent conditional: 0, dependent unconditional: 142, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1146, independent: 1118, independent conditional: 0, independent unconditional: 1118, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2526, independent: 1266, independent conditional: 0, independent unconditional: 1266, dependent: 114, dependent conditional: 0, dependent unconditional: 114, unknown: 1146, unknown conditional: 0, unknown unconditional: 1146] , Statistics on independence cache: Total cache size (in pairs): 79, Positive cache size: 66, Positive conditional cache size: 0, Positive unconditional cache size: 66, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.3s, 129 PlacesBefore, 44 PlacesAfterwards, 144 TransitionsBefore, 55 TransitionsAfterwards, 6552 CoEnabledTransitionPairs, 7 FixpointIterations, 40 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 17 ConcurrentYvCompositions, 4 ChoiceCompositions, 109 TotalNumberOfCompositions, 16839 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7712, independent: 7414, independent conditional: 0, independent unconditional: 7414, dependent: 298, dependent conditional: 0, dependent unconditional: 298, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3165, independent: 3105, independent conditional: 0, independent unconditional: 3105, dependent: 60, dependent conditional: 0, dependent unconditional: 60, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7712, independent: 4309, independent conditional: 0, independent unconditional: 4309, dependent: 238, dependent conditional: 0, dependent unconditional: 238, unknown: 3165, unknown conditional: 0, unknown unconditional: 3165] , Statistics on independence cache: Total cache size (in pairs): 300, Positive cache size: 272, Positive conditional cache size: 0, Positive unconditional cache size: 272, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 691]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L696] 0 pthread_mutex_t __global_lock = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L697] 0 int global = 0; [L698] 0 pthread_mutex_t mutex1 = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L699] 0 pthread_mutex_t mutex2 = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L707] 0 int i = __VERIFIER_nondet_int(); [L708] 0 pthread_mutex_t *m = &mutex1; [L709] COND TRUE 0 \read(i) [L709] 0 m = &mutex2 [L710] 0 pthread_t t_ids[2]; [L710] 0 int i=0; VAL [__global_lock={3:0}, global=0, i=-3, i=0, m={5:0}, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L710] COND TRUE 0 i<2 [L710] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [__global_lock={3:0}, arg={0:0}, global=0, i=-3, i=0, m={5:0}, mutex1={4:0}, mutex2={5:0}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=-2, t_ids={6:0}] [L710] 0 i++ VAL [__global_lock={3:0}, arg={0:0}, global=0, i=-3, i=1, m={5:0}, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L710] COND TRUE 0 i<2 [L702] 1 (global)++ [L710] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=-3, i=1, m={5:0}, mutex1={4:0}, mutex2={5:0}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=-1, t_ids={6:0}] [L710] 0 i++ VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=-3, i=2, m={5:0}, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L710] COND FALSE 0 !(i<2) [L712] CALL 0 __VERIFIER_assert((global) == 0) [L691] COND TRUE 0 !(cond) [L691] 0 reach_error() VAL [\old(cond)=0, __global_lock={3:0}, arg={0:0}, arg={0:0}, cond=0, global=1, mutex1={4:0}, mutex2={5:0}] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 125 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.9s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 94 IncrementalHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 1 mSDtfsCounter, 94 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=0, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 33 ConstructedInterpolants, 0 QuantifiedInterpolants, 63 SizeOfPredicates, 12 NumberOfNonLiveVariables, 141 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 148 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.7s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 148 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 111 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 27 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 313 IncrementalHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 27 mSolverCounterUnsat, 1 mSDtfsCounter, 313 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=3, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 192 SizeOfPredicates, 12 NumberOfNonLiveVariables, 144 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 6/9 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 125 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.4s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-04 03:50:19,545 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...