/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 TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_28-funptr_racefree_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 15:17:59,930 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 15:18:00,005 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 15:18:00,012 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 15:18:00,012 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 15:18:00,013 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 15:18:00,013 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 15:18:00,038 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 15:18:00,039 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 15:18:00,042 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 15:18:00,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 15:18:00,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 15:18:00,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 15:18:00,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 15:18:00,045 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 15:18:00,045 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 15:18:00,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 15:18:00,046 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 15:18:00,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 15:18:00,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 15:18:00,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 15:18:00,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 15:18:00,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 15:18:00,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 15:18:00,047 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 15:18:00,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 15:18:00,048 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 15:18:00,048 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 15:18:00,048 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 15:18:00,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 15:18:00,049 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:18:00,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 15:18:00,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 15:18:00,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 15:18:00,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 15:18:00,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 15:18:00,050 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 15:18:00,050 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 15:18:00,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 15:18:00,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 15:18:00,051 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 15:18:00,051 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 15:18:00,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 15:18:00,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 15:18:00,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 15:18:00,299 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 15:18:00,299 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 15:18:00,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_28-funptr_racefree_bound2.i [2023-08-03 15:18:01,413 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 15:18:01,698 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 15:18:01,699 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_28-funptr_racefree_bound2.i [2023-08-03 15:18:01,713 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45bfd90b/e639c3e3294c407586cb13f1cf360574/FLAG73951092c [2023-08-03 15:18:01,730 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a45bfd90b/e639c3e3294c407586cb13f1cf360574 [2023-08-03 15:18:01,735 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 15:18:01,737 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 15:18:01,739 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 15:18:01,739 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 15:18:01,742 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 15:18:01,743 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:18:01" (1/1) ... [2023-08-03 15:18:01,743 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d9876a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:01, skipping insertion in model container [2023-08-03 15:18:01,744 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:18:01" (1/1) ... [2023-08-03 15:18:01,806 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 15:18:02,119 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_28-funptr_racefree_bound2.i[41323,41336] [2023-08-03 15:18:02,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:18:02,150 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 15:18:02,175 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 15:18:02,177 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 15:18:02,184 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-03 15:18:02,205 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_28-funptr_racefree_bound2.i[41323,41336] [2023-08-03 15:18:02,211 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:18:02,271 WARN L667 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 15:18:02,277 INFO L206 MainTranslator]: Completed translation [2023-08-03 15:18:02,279 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02 WrapperNode [2023-08-03 15:18:02,279 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 15:18:02,280 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 15:18:02,280 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 15:18:02,280 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 15:18:02,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,298 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,327 INFO L138 Inliner]: procedures = 273, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 122 [2023-08-03 15:18:02,327 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 15:18:02,328 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 15:18:02,328 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 15:18:02,328 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 15:18:02,335 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,356 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,358 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,359 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,362 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 15:18:02,362 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 15:18:02,362 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 15:18:02,363 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 15:18:02,363 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (1/1) ... [2023-08-03 15:18:02,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:18:02,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:02,391 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) [2023-08-03 15:18:02,401 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 [2023-08-03 15:18:02,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 15:18:02,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 15:18:02,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 15:18:02,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 15:18:02,425 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 15:18:02,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 15:18:02,427 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 15:18:02,427 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 15:18:02,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 15:18:02,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 15:18:02,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 15:18:02,429 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 15:18:02,594 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 15:18:02,595 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 15:18:02,764 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 15:18:02,780 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 15:18:02,780 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-03 15:18:02,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:18:02 BoogieIcfgContainer [2023-08-03 15:18:02,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 15:18:02,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 15:18:02,784 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 15:18:02,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 15:18:02,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 03:18:01" (1/3) ... [2023-08-03 15:18:02,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d67473f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:18:02, skipping insertion in model container [2023-08-03 15:18:02,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:18:02" (2/3) ... [2023-08-03 15:18:02,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d67473f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:18:02, skipping insertion in model container [2023-08-03 15:18:02,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:18:02" (3/3) ... [2023-08-03 15:18:02,792 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_28-funptr_racefree_bound2.i [2023-08-03 15:18:02,798 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 15:18:02,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 15:18:02,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 15:18:02,804 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 15:18:02,858 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 15:18:02,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 246 flow [2023-08-03 15:18:02,939 INFO L124 PetriNetUnfolderBase]: 17/156 cut-off events. [2023-08-03 15:18:02,940 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 15:18:02,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 352 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-03 15:18:02,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 246 flow [2023-08-03 15:18:02,949 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 233 flow [2023-08-03 15:18:02,953 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:18:02,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-03 15:18:02,963 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-03 15:18:02,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 114 transitions, 233 flow [2023-08-03 15:18:02,989 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-08-03 15:18:02,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:18:02,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 339 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-08-03 15:18:02,994 INFO L119 LiptonReduction]: Number of co-enabled transitions 3096 [2023-08-03 15:18:05,935 INFO L134 LiptonReduction]: Checked pairs total: 6627 [2023-08-03 15:18:05,935 INFO L136 LiptonReduction]: Total number of compositions: 91 [2023-08-03 15:18:05,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:18:05,952 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;@727b4c2e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:18:05,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 15:18:05,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:18:05,957 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2023-08-03 15:18:05,957 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:18:05,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:05,958 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 15:18:05,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:05,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:05,962 INFO L85 PathProgramCache]: Analyzing trace with hash 432317202, now seen corresponding path program 1 times [2023-08-03 15:18:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:05,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821617488] [2023-08-03 15:18:05,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:05,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:06,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:18:06,073 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 15:18:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:18:06,113 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 15:18:06,114 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 15:18:06,115 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 15:18:06,117 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-03 15:18:06,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 15:18:06,117 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 15:18:06,120 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 15:18:06,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 15:18:06,139 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 15:18:06,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-03 15:18:06,178 INFO L124 PetriNetUnfolderBase]: 31/255 cut-off events. [2023-08-03 15:18:06,178 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 15:18:06,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 755 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-03 15:18:06,181 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 332 flow [2023-08-03 15:18:06,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 332 flow [2023-08-03 15:18:06,183 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:18:06,183 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-03 15:18:06,183 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 157 transitions, 332 flow [2023-08-03 15:18:06,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 332 flow [2023-08-03 15:18:06,213 INFO L124 PetriNetUnfolderBase]: 31/255 cut-off events. [2023-08-03 15:18:06,213 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 15:18:06,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269 conditions, 255 events. 31/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 755 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-03 15:18:06,221 INFO L119 LiptonReduction]: Number of co-enabled transitions 9576 [2023-08-03 15:18:09,060 INFO L134 LiptonReduction]: Checked pairs total: 23792 [2023-08-03 15:18:09,060 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-03 15:18:09,062 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:18:09,063 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;@727b4c2e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:18:09,063 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 15:18:09,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:18:09,066 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-08-03 15:18:09,066 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 15:18:09,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:09,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:09,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:09,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:09,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1382064333, now seen corresponding path program 1 times [2023-08-03 15:18:09,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:09,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167444088] [2023-08-03 15:18:09,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:09,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:09,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:09,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:09,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167444088] [2023-08-03 15:18:09,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167444088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:09,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:18:09,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:18:09,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928635225] [2023-08-03 15:18:09,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:09,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:18:09,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:18:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:18:09,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 268 [2023-08-03 15:18:09,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-08-03 15:18:09,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:09,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 268 [2023-08-03 15:18:09,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:09,761 INFO L124 PetriNetUnfolderBase]: 3209/5651 cut-off events. [2023-08-03 15:18:09,761 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-03 15:18:09,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10885 conditions, 5651 events. 3209/5651 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 35792 event pairs, 1480 based on Foata normal form. 634/5792 useless extension candidates. Maximal degree in co-relation 857. Up to 5130 conditions per place. [2023-08-03 15:18:09,783 INFO L140 encePairwiseOnDemand]: 251/268 looper letters, 42 selfloop transitions, 2 changer transitions 9/63 dead transitions. [2023-08-03 15:18:09,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 248 flow [2023-08-03 15:18:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:18:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:18:09,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-03 15:18:09,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796019900497512 [2023-08-03 15:18:09,796 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-03 15:18:09,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-03 15:18:09,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:09,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-03 15:18:09,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 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) [2023-08-03 15:18:09,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-08-03 15:18:09,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-08-03 15:18:09,810 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 146 flow. Second operand 3 states and 466 transitions. [2023-08-03 15:18:09,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 248 flow [2023-08-03 15:18:09,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 15:18:09,815 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 106 flow [2023-08-03 15:18:09,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-03 15:18:09,819 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-03 15:18:09,819 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 106 flow [2023-08-03 15:18:09,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 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) [2023-08-03 15:18:09,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:09,820 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 15:18:09,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 15:18:09,820 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:09,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:09,821 INFO L85 PathProgramCache]: Analyzing trace with hash -2038109542, now seen corresponding path program 1 times [2023-08-03 15:18:09,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:09,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317097714] [2023-08-03 15:18:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:09,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:09,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:09,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317097714] [2023-08-03 15:18:09,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317097714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:09,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726463422] [2023-08-03 15:18:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:09,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:09,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:09,929 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) [2023-08-03 15:18:09,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 15:18:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:10,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 15:18:10,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:10,081 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:18:10,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726463422] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:10,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:18:10,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 15:18:10,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608493871] [2023-08-03 15:18:10,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:10,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:18:10,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:18:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:18:10,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 268 [2023-08-03 15:18:10,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 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) [2023-08-03 15:18:10,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:10,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 268 [2023-08-03 15:18:10,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:10,407 INFO L124 PetriNetUnfolderBase]: 1644/2874 cut-off events. [2023-08-03 15:18:10,408 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2023-08-03 15:18:10,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5885 conditions, 2874 events. 1644/2874 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 16927 event pairs, 0 based on Foata normal form. 132/3005 useless extension candidates. Maximal degree in co-relation 498. Up to 2353 conditions per place. [2023-08-03 15:18:10,421 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 62 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2023-08-03 15:18:10,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 75 transitions, 302 flow [2023-08-03 15:18:10,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 15:18:10,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 15:18:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-03 15:18:10,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5350746268656716 [2023-08-03 15:18:10,425 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-03 15:18:10,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-03 15:18:10,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:10,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-03 15:18:10,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 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) [2023-08-03 15:18:10,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 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) [2023-08-03 15:18:10,430 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 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) [2023-08-03 15:18:10,431 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 106 flow. Second operand 5 states and 717 transitions. [2023-08-03 15:18:10,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 75 transitions, 302 flow [2023-08-03 15:18:10,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 75 transitions, 299 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:18:10,433 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 118 flow [2023-08-03 15:18:10,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-08-03 15:18:10,434 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2023-08-03 15:18:10,434 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 118 flow [2023-08-03 15:18:10,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 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) [2023-08-03 15:18:10,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:10,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:10,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 15:18:10,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:10,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:10,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1576556382, now seen corresponding path program 1 times [2023-08-03 15:18:10,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:10,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825546284] [2023-08-03 15:18:10,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:10,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:10,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:10,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:10,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825546284] [2023-08-03 15:18:10,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825546284] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:10,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990509334] [2023-08-03 15:18:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:10,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:10,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:10,738 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) [2023-08-03 15:18:10,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 15:18:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:10,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 15:18:10,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:10,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:10,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:18:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990509334] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:10,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:10,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 15:18:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321882643] [2023-08-03 15:18:10,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:10,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:18:10,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:18:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 15:18:10,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 268 [2023-08-03 15:18:10,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 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) [2023-08-03 15:18:10,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:10,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 268 [2023-08-03 15:18:10,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:11,140 INFO L124 PetriNetUnfolderBase]: 1589/2747 cut-off events. [2023-08-03 15:18:11,140 INFO L125 PetriNetUnfolderBase]: For 864/864 co-relation queries the response was YES. [2023-08-03 15:18:11,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6042 conditions, 2747 events. 1589/2747 cut-off events. For 864/864 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 15634 event pairs, 0 based on Foata normal form. 12/2758 useless extension candidates. Maximal degree in co-relation 498. Up to 2239 conditions per place. [2023-08-03 15:18:11,157 INFO L140 encePairwiseOnDemand]: 265/268 looper letters, 62 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-03 15:18:11,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 74 transitions, 308 flow [2023-08-03 15:18:11,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 15:18:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 15:18:11,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 586 transitions. [2023-08-03 15:18:11,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5466417910447762 [2023-08-03 15:18:11,159 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 586 transitions. [2023-08-03 15:18:11,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 586 transitions. [2023-08-03 15:18:11,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:11,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 586 transitions. [2023-08-03 15:18:11,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 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) [2023-08-03 15:18:11,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 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) [2023-08-03 15:18:11,164 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 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) [2023-08-03 15:18:11,164 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 118 flow. Second operand 4 states and 586 transitions. [2023-08-03 15:18:11,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 74 transitions, 308 flow [2023-08-03 15:18:11,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 303 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 15:18:11,167 INFO L231 Difference]: Finished difference. Result has 53 places, 41 transitions, 111 flow [2023-08-03 15:18:11,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=111, PETRI_PLACES=53, PETRI_TRANSITIONS=41} [2023-08-03 15:18:11,168 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-08-03 15:18:11,168 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 41 transitions, 111 flow [2023-08-03 15:18:11,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 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) [2023-08-03 15:18:11,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:11,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:11,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 15:18:11,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 15:18:11,374 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:11,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:11,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1728367728, now seen corresponding path program 1 times [2023-08-03 15:18:11,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:11,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753873109] [2023-08-03 15:18:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:11,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 15:18:11,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753873109] [2023-08-03 15:18:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753873109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:11,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:18:11,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 15:18:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107751523] [2023-08-03 15:18:11,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:11,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:18:11,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:11,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:18:11,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:18:11,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 268 [2023-08-03 15:18:11,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 41 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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) [2023-08-03 15:18:11,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:11,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 268 [2023-08-03 15:18:11,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:11,763 INFO L124 PetriNetUnfolderBase]: 1666/2886 cut-off events. [2023-08-03 15:18:11,763 INFO L125 PetriNetUnfolderBase]: For 1378/1378 co-relation queries the response was YES. [2023-08-03 15:18:11,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6378 conditions, 2886 events. 1666/2886 cut-off events. For 1378/1378 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 15669 event pairs, 646 based on Foata normal form. 36/2904 useless extension candidates. Maximal degree in co-relation 4595. Up to 2101 conditions per place. [2023-08-03 15:18:11,780 INFO L140 encePairwiseOnDemand]: 264/268 looper letters, 50 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-08-03 15:18:11,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 279 flow [2023-08-03 15:18:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:18:11,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:18:11,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-03 15:18:11,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497512437810945 [2023-08-03 15:18:11,782 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-03 15:18:11,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-03 15:18:11,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:11,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-03 15:18:11,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 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) [2023-08-03 15:18:11,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-08-03 15:18:11,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-08-03 15:18:11,786 INFO L175 Difference]: Start difference. First operand has 53 places, 41 transitions, 111 flow. Second operand 3 states and 442 transitions. [2023-08-03 15:18:11,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 279 flow [2023-08-03 15:18:11,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 61 transitions, 269 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 15:18:11,791 INFO L231 Difference]: Finished difference. Result has 53 places, 43 transitions, 124 flow [2023-08-03 15:18:11,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, 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=124, PETRI_PLACES=53, PETRI_TRANSITIONS=43} [2023-08-03 15:18:11,793 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 0 predicate places. [2023-08-03 15:18:11,793 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 43 transitions, 124 flow [2023-08-03 15:18:11,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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) [2023-08-03 15:18:11,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:11,794 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:11,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 15:18:11,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:11,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:11,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1948488722, now seen corresponding path program 1 times [2023-08-03 15:18:11,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:11,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816642079] [2023-08-03 15:18:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:11,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 15:18:12,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:12,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816642079] [2023-08-03 15:18:12,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816642079] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:12,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:18:12,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 15:18:12,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511588358] [2023-08-03 15:18:12,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:12,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:18:12,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:18:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 15:18:12,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 268 [2023-08-03 15:18:12,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 43 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 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) [2023-08-03 15:18:12,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:12,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 268 [2023-08-03 15:18:12,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:12,247 INFO L124 PetriNetUnfolderBase]: 730/1466 cut-off events. [2023-08-03 15:18:12,247 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2023-08-03 15:18:12,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 1466 events. 730/1466 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7527 event pairs, 183 based on Foata normal form. 152/1617 useless extension candidates. Maximal degree in co-relation 1758. Up to 947 conditions per place. [2023-08-03 15:18:12,254 INFO L140 encePairwiseOnDemand]: 262/268 looper letters, 41 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-08-03 15:18:12,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 56 transitions, 262 flow [2023-08-03 15:18:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 15:18:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 15:18:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 519 transitions. [2023-08-03 15:18:12,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841417910447761 [2023-08-03 15:18:12,257 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 519 transitions. [2023-08-03 15:18:12,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 519 transitions. [2023-08-03 15:18:12,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:12,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 519 transitions. [2023-08-03 15:18:12,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 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) [2023-08-03 15:18:12,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 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) [2023-08-03 15:18:12,261 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 268.0) internal successors, (1340), 5 states have internal predecessors, (1340), 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) [2023-08-03 15:18:12,262 INFO L175 Difference]: Start difference. First operand has 53 places, 43 transitions, 124 flow. Second operand 4 states and 519 transitions. [2023-08-03 15:18:12,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 56 transitions, 262 flow [2023-08-03 15:18:12,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 56 transitions, 259 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 15:18:12,264 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 133 flow [2023-08-03 15:18:12,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2023-08-03 15:18:12,267 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-03 15:18:12,267 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 133 flow [2023-08-03 15:18:12,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.4) internal successors, (607), 5 states have internal predecessors, (607), 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) [2023-08-03 15:18:12,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:12,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:12,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 15:18:12,268 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:12,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:12,268 INFO L85 PathProgramCache]: Analyzing trace with hash 996073001, now seen corresponding path program 1 times [2023-08-03 15:18:12,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:12,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67335291] [2023-08-03 15:18:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 15:18:12,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67335291] [2023-08-03 15:18:12,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67335291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:12,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:18:12,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 15:18:12,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381857491] [2023-08-03 15:18:12,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:12,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 15:18:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:12,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 15:18:12,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:18:12,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 268 [2023-08-03 15:18:12,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 43 transitions, 133 flow. Second operand has 6 states, 6 states have (on average 128.66666666666666) internal successors, (772), 6 states have internal predecessors, (772), 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) [2023-08-03 15:18:12,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:12,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 268 [2023-08-03 15:18:12,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:12,712 INFO L124 PetriNetUnfolderBase]: 640/1261 cut-off events. [2023-08-03 15:18:12,712 INFO L125 PetriNetUnfolderBase]: For 707/711 co-relation queries the response was YES. [2023-08-03 15:18:12,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3048 conditions, 1261 events. 640/1261 cut-off events. For 707/711 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6176 event pairs, 333 based on Foata normal form. 4/1262 useless extension candidates. Maximal degree in co-relation 1599. Up to 586 conditions per place. [2023-08-03 15:18:12,717 INFO L140 encePairwiseOnDemand]: 261/268 looper letters, 70 selfloop transitions, 7 changer transitions 2/86 dead transitions. [2023-08-03 15:18:12,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 86 transitions, 445 flow [2023-08-03 15:18:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 15:18:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 15:18:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 825 transitions. [2023-08-03 15:18:12,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5130597014925373 [2023-08-03 15:18:12,720 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 825 transitions. [2023-08-03 15:18:12,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 825 transitions. [2023-08-03 15:18:12,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:12,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 825 transitions. [2023-08-03 15:18:12,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 137.5) internal successors, (825), 6 states have internal predecessors, (825), 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) [2023-08-03 15:18:12,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 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) [2023-08-03 15:18:12,725 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 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) [2023-08-03 15:18:12,725 INFO L175 Difference]: Start difference. First operand has 55 places, 43 transitions, 133 flow. Second operand 6 states and 825 transitions. [2023-08-03 15:18:12,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 86 transitions, 445 flow [2023-08-03 15:18:12,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 86 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:18:12,728 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 164 flow [2023-08-03 15:18:12,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2023-08-03 15:18:12,728 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2023-08-03 15:18:12,728 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 164 flow [2023-08-03 15:18:12,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 128.66666666666666) internal successors, (772), 6 states have internal predecessors, (772), 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) [2023-08-03 15:18:12,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:12,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:12,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 15:18:12,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:12,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:12,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1782718522, now seen corresponding path program 1 times [2023-08-03 15:18:12,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:12,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671879645] [2023-08-03 15:18:12,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:12,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:12,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 15:18:12,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:12,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671879645] [2023-08-03 15:18:12,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671879645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:12,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:18:12,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 15:18:12,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123730094] [2023-08-03 15:18:12,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:12,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:18:12,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:18:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:18:12,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 268 [2023-08-03 15:18:12,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-08-03 15:18:12,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:12,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 268 [2023-08-03 15:18:12,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:12,994 INFO L124 PetriNetUnfolderBase]: 711/1443 cut-off events. [2023-08-03 15:18:12,994 INFO L125 PetriNetUnfolderBase]: For 1007/1007 co-relation queries the response was YES. [2023-08-03 15:18:12,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3563 conditions, 1443 events. 711/1443 cut-off events. For 1007/1007 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7933 event pairs, 282 based on Foata normal form. 96/1528 useless extension candidates. Maximal degree in co-relation 2215. Up to 829 conditions per place. [2023-08-03 15:18:13,001 INFO L140 encePairwiseOnDemand]: 256/268 looper letters, 55 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2023-08-03 15:18:13,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 402 flow [2023-08-03 15:18:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:18:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:18:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-03 15:18:13,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248756218905473 [2023-08-03 15:18:13,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-03 15:18:13,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-03 15:18:13,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:13,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-03 15:18:13,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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) [2023-08-03 15:18:13,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-08-03 15:18:13,005 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 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) [2023-08-03 15:18:13,006 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 164 flow. Second operand 3 states and 422 transitions. [2023-08-03 15:18:13,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 402 flow [2023-08-03 15:18:13,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 399 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 15:18:13,009 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 235 flow [2023-08-03 15:18:13,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=235, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-03 15:18:13,009 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-03 15:18:13,009 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 235 flow [2023-08-03 15:18:13,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 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) [2023-08-03 15:18:13,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:13,010 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:13,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 15:18:13,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:13,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:13,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1482671878, now seen corresponding path program 2 times [2023-08-03 15:18:13,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:13,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509328425] [2023-08-03 15:18:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:13,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 15:18:13,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:13,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509328425] [2023-08-03 15:18:13,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509328425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:18:13,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:18:13,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 15:18:13,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831320632] [2023-08-03 15:18:13,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:18:13,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 15:18:13,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:13,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 15:18:13,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:18:13,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 268 [2023-08-03 15:18:13,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 128.66666666666666) internal successors, (772), 6 states have internal predecessors, (772), 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) [2023-08-03 15:18:13,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:13,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 268 [2023-08-03 15:18:13,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:13,421 INFO L124 PetriNetUnfolderBase]: 711/1470 cut-off events. [2023-08-03 15:18:13,421 INFO L125 PetriNetUnfolderBase]: For 1563/1565 co-relation queries the response was YES. [2023-08-03 15:18:13,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4417 conditions, 1470 events. 711/1470 cut-off events. For 1563/1565 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 7959 event pairs, 273 based on Foata normal form. 6/1467 useless extension candidates. Maximal degree in co-relation 2776. Up to 592 conditions per place. [2023-08-03 15:18:13,435 INFO L140 encePairwiseOnDemand]: 260/268 looper letters, 83 selfloop transitions, 9 changer transitions 2/103 dead transitions. [2023-08-03 15:18:13,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 103 transitions, 637 flow [2023-08-03 15:18:13,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 15:18:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 15:18:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 952 transitions. [2023-08-03 15:18:13,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5074626865671642 [2023-08-03 15:18:13,438 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 952 transitions. [2023-08-03 15:18:13,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 952 transitions. [2023-08-03 15:18:13,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:13,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 952 transitions. [2023-08-03 15:18:13,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 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) [2023-08-03 15:18:13,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 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) [2023-08-03 15:18:13,445 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 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) [2023-08-03 15:18:13,445 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 235 flow. Second operand 7 states and 952 transitions. [2023-08-03 15:18:13,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 103 transitions, 637 flow [2023-08-03 15:18:13,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 103 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 15:18:13,450 INFO L231 Difference]: Finished difference. Result has 72 places, 60 transitions, 280 flow [2023-08-03 15:18:13,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=72, PETRI_TRANSITIONS=60} [2023-08-03 15:18:13,453 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 19 predicate places. [2023-08-03 15:18:13,453 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 60 transitions, 280 flow [2023-08-03 15:18:13,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 128.66666666666666) internal successors, (772), 6 states have internal predecessors, (772), 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) [2023-08-03 15:18:13,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:18:13,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:13,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 15:18:13,454 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 15:18:13,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:18:13,455 INFO L85 PathProgramCache]: Analyzing trace with hash -57792935, now seen corresponding path program 1 times [2023-08-03 15:18:13,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:18:13,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654395332] [2023-08-03 15:18:13,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:13,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:18:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 15:18:13,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:18:13,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654395332] [2023-08-03 15:18:13,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654395332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:18:13,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340289090] [2023-08-03 15:18:13,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:18:13,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:13,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:18:13,707 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 15:18:13,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 15:18:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:18:13,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-03 15:18:13,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:18:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 15:18:13,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 15:18:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 15:18:14,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340289090] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 15:18:14,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 15:18:14,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2023-08-03 15:18:14,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719534829] [2023-08-03 15:18:14,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 15:18:14,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 15:18:14,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:18:14,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 15:18:14,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-03 15:18:14,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 268 [2023-08-03 15:18:14,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 60 transitions, 280 flow. Second operand has 8 states, 8 states have (on average 124.25) internal successors, (994), 8 states have internal predecessors, (994), 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) [2023-08-03 15:18:14,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:18:14,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 268 [2023-08-03 15:18:14,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:18:14,429 INFO L124 PetriNetUnfolderBase]: 732/1505 cut-off events. [2023-08-03 15:18:14,430 INFO L125 PetriNetUnfolderBase]: For 1358/1360 co-relation queries the response was YES. [2023-08-03 15:18:14,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4597 conditions, 1505 events. 732/1505 cut-off events. For 1358/1360 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 8129 event pairs, 340 based on Foata normal form. 1/1501 useless extension candidates. Maximal degree in co-relation 3108. Up to 867 conditions per place. [2023-08-03 15:18:14,434 INFO L140 encePairwiseOnDemand]: 257/268 looper letters, 0 selfloop transitions, 0 changer transitions 111/111 dead transitions. [2023-08-03 15:18:14,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 710 flow [2023-08-03 15:18:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 15:18:14,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 15:18:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1159 transitions. [2023-08-03 15:18:14,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480514096185738 [2023-08-03 15:18:14,438 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1159 transitions. [2023-08-03 15:18:14,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1159 transitions. [2023-08-03 15:18:14,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:18:14,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1159 transitions. [2023-08-03 15:18:14,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 128.77777777777777) internal successors, (1159), 9 states have internal predecessors, (1159), 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) [2023-08-03 15:18:14,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 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) [2023-08-03 15:18:14,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 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) [2023-08-03 15:18:14,444 INFO L175 Difference]: Start difference. First operand has 72 places, 60 transitions, 280 flow. Second operand 9 states and 1159 transitions. [2023-08-03 15:18:14,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 710 flow [2023-08-03 15:18:14,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 111 transitions, 704 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:18:14,450 INFO L231 Difference]: Finished difference. Result has 77 places, 0 transitions, 0 flow [2023-08-03 15:18:14,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=77, PETRI_TRANSITIONS=0} [2023-08-03 15:18:14,450 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 24 predicate places. [2023-08-03 15:18:14,451 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 0 transitions, 0 flow [2023-08-03 15:18:14,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 124.25) internal successors, (994), 8 states have internal predecessors, (994), 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) [2023-08-03 15:18:14,451 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-03 15:18:14,451 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 15:18:14,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 15:18:14,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:18:14,656 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:18:14,657 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 15:18:14,657 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 15:18:14,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 03:18:14 BasicIcfg [2023-08-03 15:18:14,660 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 15:18:14,660 INFO L158 Benchmark]: Toolchain (without parser) took 12923.74ms. Allocated memory was 488.6MB in the beginning and 587.2MB in the end (delta: 98.6MB). Free memory was 438.1MB in the beginning and 461.3MB in the end (delta: -23.2MB). Peak memory consumption was 78.0MB. Max. memory is 16.0GB. [2023-08-03 15:18:14,660 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory was 307.6MB in the beginning and 307.5MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 15:18:14,661 INFO L158 Benchmark]: CACSL2BoogieTranslator took 540.01ms. Allocated memory is still 488.6MB. Free memory was 438.1MB in the beginning and 408.7MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-03 15:18:14,661 INFO L158 Benchmark]: Boogie Procedure Inliner took 47.41ms. Allocated memory is still 488.6MB. Free memory was 408.7MB in the beginning and 406.0MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 15:18:14,661 INFO L158 Benchmark]: Boogie Preprocessor took 34.01ms. Allocated memory is still 488.6MB. Free memory was 406.0MB in the beginning and 404.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 15:18:14,661 INFO L158 Benchmark]: RCFGBuilder took 420.13ms. Allocated memory is still 488.6MB. Free memory was 404.3MB in the beginning and 449.0MB in the end (delta: -44.7MB). Peak memory consumption was 16.1MB. Max. memory is 16.0GB. [2023-08-03 15:18:14,662 INFO L158 Benchmark]: TraceAbstraction took 11875.86ms. Allocated memory was 488.6MB in the beginning and 587.2MB in the end (delta: 98.6MB). Free memory was 448.2MB in the beginning and 461.3MB in the end (delta: -13.0MB). Peak memory consumption was 87.1MB. Max. memory is 16.0GB. [2023-08-03 15:18:14,663 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 356.5MB. Free memory was 307.6MB in the beginning and 307.5MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 540.01ms. Allocated memory is still 488.6MB. Free memory was 438.1MB in the beginning and 408.7MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 47.41ms. Allocated memory is still 488.6MB. Free memory was 408.7MB in the beginning and 406.0MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.01ms. Allocated memory is still 488.6MB. Free memory was 406.0MB in the beginning and 404.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 420.13ms. Allocated memory is still 488.6MB. Free memory was 404.3MB in the beginning and 449.0MB in the end (delta: -44.7MB). Peak memory consumption was 16.1MB. Max. memory is 16.0GB. * TraceAbstraction took 11875.86ms. Allocated memory was 488.6MB in the beginning and 587.2MB in the end (delta: 98.6MB). Free memory was 448.2MB in the beginning and 461.3MB in the end (delta: -13.0MB). Peak memory consumption was 87.1MB. 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] - GenericResultAtLocation [Line: 736]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [736] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 106 PlacesBefore, 31 PlacesAfterwards, 114 TransitionsBefore, 36 TransitionsAfterwards, 3096 CoEnabledTransitionPairs, 7 FixpointIterations, 33 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 91 TotalNumberOfCompositions, 6627 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3008, independent: 2774, independent conditional: 0, independent unconditional: 2774, dependent: 234, dependent conditional: 0, dependent unconditional: 234, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1576, independent: 1536, independent conditional: 0, independent unconditional: 1536, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3008, independent: 1238, independent conditional: 0, independent unconditional: 1238, dependent: 194, dependent conditional: 0, dependent unconditional: 194, unknown: 1576, unknown conditional: 0, unknown unconditional: 1576] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 71, Positive conditional cache size: 0, Positive unconditional cache size: 71, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 143 PlacesBefore, 53 PlacesAfterwards, 157 TransitionsBefore, 64 TransitionsAfterwards, 9576 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 21 ConcurrentYvCompositions, 3 ChoiceCompositions, 111 TotalNumberOfCompositions, 23792 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9728, independent: 9362, independent conditional: 0, independent unconditional: 9362, dependent: 366, dependent conditional: 0, dependent unconditional: 366, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 4475, independent: 4407, independent conditional: 0, independent unconditional: 4407, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9728, independent: 4955, independent conditional: 0, independent unconditional: 4955, dependent: 298, dependent conditional: 0, dependent unconditional: 298, unknown: 4475, unknown conditional: 0, unknown unconditional: 4475] , Statistics on independence cache: Total cache size (in pairs): 342, Positive cache size: 308, Positive conditional cache size: 0, Positive unconditional cache size: 308, Negative cache size: 34, Negative conditional cache size: 0, Negative unconditional cache size: 34, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 929]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 139 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: 3.2s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 170 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: 8.5s, OverallIterations: 9, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 626 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 464 mSDsluCounter, 134 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 101 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1753 IncrementalHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 33 mSDtfsCounter, 1753 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 111 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=280occurred in iteration=8, InterpolantAutomatonStates: 44, 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 262 NumberOfCodeBlocks, 262 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 302 ConstructedInterpolants, 0 QuantifiedInterpolants, 1103 SizeOfPredicates, 5 NumberOfNonLiveVariables, 590 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 53/67 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-03 15:18:14,678 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...