/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_25_stack_longer-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:54:59,602 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:54:59,679 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:54:59,685 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:54:59,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:54:59,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:54:59,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:54:59,714 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:54:59,714 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:54:59,718 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:54:59,719 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:54:59,719 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:54:59,720 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:54:59,725 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:54:59,725 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:54:59,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:54:59,726 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:54:59,726 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:54:59,726 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:54:59,727 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:54:59,727 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:54:59,727 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:54:59,728 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:54:59,728 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:54:59,728 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:54:59,728 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:54:59,728 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:54:59,729 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:54:59,729 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:54:59,730 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:54:59,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:54:59,731 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:54:59,731 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:54:59,731 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:54:59,731 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:54:59,731 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:54:59,732 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:54:59,732 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:54:59,732 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:54:59,732 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:54:59,732 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:54:59,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:54:59,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:55:00,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:55:00,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:55:00,011 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:55:00,011 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:55:00,012 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_25_stack_longer-2_bound2.i [2023-08-03 21:55:01,256 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:55:01,513 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:55:01,513 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_25_stack_longer-2_bound2.i [2023-08-03 21:55:01,532 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/940b3c993/aa7134a1e92e4bea816b9e85c0c4b6b9/FLAG1d8654744 [2023-08-03 21:55:01,545 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/940b3c993/aa7134a1e92e4bea816b9e85c0c4b6b9 [2023-08-03 21:55:01,550 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:55:01,552 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:55:01,555 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:55:01,555 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:55:01,559 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:55:01,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:01,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20e50f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01, skipping insertion in model container [2023-08-03 21:55:01,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:01,607 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:55:01,880 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/pthread-ext_25_stack_longer-2_bound2.i[31179,31192] [2023-08-03 21:55:01,891 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:55:01,905 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:55:01,929 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [256] [2023-08-03 21:55:01,936 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [256] [2023-08-03 21:55:01,948 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/pthread-ext_25_stack_longer-2_bound2.i[31179,31192] [2023-08-03 21:55:01,952 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:55:01,978 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:55:01,979 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 21:55:01,985 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:55:01,985 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01 WrapperNode [2023-08-03 21:55:01,985 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:55:01,986 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:55:01,986 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:55:01,986 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:55:01,992 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,043 INFO L138 Inliner]: procedures = 179, calls = 36, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 179 [2023-08-03 21:55:02,043 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:55:02,044 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:55:02,044 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:55:02,044 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:55:02,052 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,054 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,060 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,074 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,075 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,078 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:55:02,078 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:55:02,078 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:55:02,079 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:55:02,079 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (1/1) ... [2023-08-03 21:55:02,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:55:02,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:55:02,125 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 21:55:02,150 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 21:55:02,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:55:02,165 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-03 21:55:02,165 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-03 21:55:02,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:55:02,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 21:55:02,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:55:02,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:55:02,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:55:02,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:55:02,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 21:55:02,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:55:02,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:55:02,169 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 21:55:02,319 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:55:02,321 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:55:02,595 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:55:02,745 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:55:02,746 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 21:55:02,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:55:02 BoogieIcfgContainer [2023-08-03 21:55:02,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:55:02,750 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:55:02,750 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:55:02,753 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:55:02,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:55:01" (1/3) ... [2023-08-03 21:55:02,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9a1b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:55:02, skipping insertion in model container [2023-08-03 21:55:02,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:55:01" (2/3) ... [2023-08-03 21:55:02,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9a1b6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:55:02, skipping insertion in model container [2023-08-03 21:55:02,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:55:02" (3/3) ... [2023-08-03 21:55:02,755 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_25_stack_longer-2_bound2.i [2023-08-03 21:55:02,762 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:55:02,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:55:02,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:55:02,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:55:02,827 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:55:02,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 100 transitions, 205 flow [2023-08-03 21:55:02,905 INFO L124 PetriNetUnfolderBase]: 8/110 cut-off events. [2023-08-03 21:55:02,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:55:02,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 110 events. 8/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-03 21:55:02,912 INFO L82 GeneralOperation]: Start removeDead. Operand has 96 places, 100 transitions, 205 flow [2023-08-03 21:55:02,916 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 96 places, 100 transitions, 205 flow [2023-08-03 21:55:02,919 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:55:02,933 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 96 places, 100 transitions, 205 flow [2023-08-03 21:55:02,938 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 96 places, 100 transitions, 205 flow [2023-08-03 21:55:02,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 96 places, 100 transitions, 205 flow [2023-08-03 21:55:02,983 INFO L124 PetriNetUnfolderBase]: 8/110 cut-off events. [2023-08-03 21:55:02,984 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:55:02,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 110 events. 8/110 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 113 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-03 21:55:02,988 INFO L119 LiptonReduction]: Number of co-enabled transitions 1984 [2023-08-03 21:55:08,289 INFO L134 LiptonReduction]: Checked pairs total: 1726 [2023-08-03 21:55:08,289 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-03 21:55:08,301 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:55:08,306 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;@50533a3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:55:08,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:55:08,310 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:55:08,310 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-03 21:55:08,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:55:08,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:08,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:55:08,312 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:55:08,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:08,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1092898197, now seen corresponding path program 1 times [2023-08-03 21:55:08,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:08,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42171782] [2023-08-03 21:55:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:08,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:55:08,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:55:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:55:08,466 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:55:08,468 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:55:08,469 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:55:08,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:55:08,471 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:55:08,473 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:55:08,474 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:55:08,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:55:08,521 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:55:08,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:08,558 INFO L124 PetriNetUnfolderBase]: 15/188 cut-off events. [2023-08-03 21:55:08,558 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:55:08,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 188 events. 15/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 342 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2023-08-03 21:55:08,561 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:08,563 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:08,564 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:55:08,564 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:08,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:08,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:08,606 INFO L124 PetriNetUnfolderBase]: 15/188 cut-off events. [2023-08-03 21:55:08,607 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:55:08,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 188 events. 15/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 342 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2023-08-03 21:55:08,621 INFO L119 LiptonReduction]: Number of co-enabled transitions 11780 [2023-08-03 21:55:13,272 INFO L134 LiptonReduction]: Checked pairs total: 23811 [2023-08-03 21:55:13,272 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-03 21:55:13,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:55:13,277 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;@50533a3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:55:13,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:55:13,282 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:55:13,282 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2023-08-03 21:55:13,283 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:55:13,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:13,283 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:55:13,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:55:13,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:13,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1302958535, now seen corresponding path program 1 times [2023-08-03 21:55:13,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:13,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271655278] [2023-08-03 21:55:13,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:13,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:13,463 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 21:55:13,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:13,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271655278] [2023-08-03 21:55:13,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271655278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:55:13,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130416462] [2023-08-03 21:55:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:13,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:55:13,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:55:13,469 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 21:55:13,477 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 21:55:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:13,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:55:13,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:55:13,643 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 21:55:13,643 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:55:13,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130416462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:13,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:55:13,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:55:13,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190919450] [2023-08-03 21:55:13,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:13,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:55:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:13,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:55:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:55:13,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2023-08-03 21:55:13,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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 21:55:13,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:13,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2023-08-03 21:55:13,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:14,025 INFO L124 PetriNetUnfolderBase]: 934/1547 cut-off events. [2023-08-03 21:55:14,026 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-03 21:55:14,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2993 conditions, 1547 events. 934/1547 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7715 event pairs, 0 based on Foata normal form. 0/1191 useless extension candidates. Maximal degree in co-relation 291. Up to 987 conditions per place. [2023-08-03 21:55:14,031 INFO L140 encePairwiseOnDemand]: 282/288 looper letters, 0 selfloop transitions, 0 changer transitions 101/101 dead transitions. [2023-08-03 21:55:14,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 101 transitions, 370 flow [2023-08-03 21:55:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:55:14,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:55:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 751 transitions. [2023-08-03 21:55:14,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215277777777778 [2023-08-03 21:55:14,048 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 751 transitions. [2023-08-03 21:55:14,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 751 transitions. [2023-08-03 21:55:14,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:14,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 751 transitions. [2023-08-03 21:55:14,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.2) internal successors, (751), 5 states have internal predecessors, (751), 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 21:55:14,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 21:55:14,063 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 21:55:14,065 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 128 flow. Second operand 5 states and 751 transitions. [2023-08-03 21:55:14,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 101 transitions, 370 flow [2023-08-03 21:55:14,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 101 transitions, 369 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:55:14,070 INFO L231 Difference]: Finished difference. Result has 55 places, 0 transitions, 0 flow [2023-08-03 21:55:14,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=55, PETRI_TRANSITIONS=0} [2023-08-03 21:55:14,074 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-03 21:55:14,075 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 0 transitions, 0 flow [2023-08-03 21:55:14,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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 21:55:14,076 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:55:14,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 21:55:14,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:55:14,282 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:55:14,283 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:55:14,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:14,309 INFO L124 PetriNetUnfolderBase]: 15/188 cut-off events. [2023-08-03 21:55:14,309 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:55:14,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 188 events. 15/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 342 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2023-08-03 21:55:14,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:14,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:14,312 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:55:14,312 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:14,313 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:14,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 163 transitions, 338 flow [2023-08-03 21:55:14,331 INFO L124 PetriNetUnfolderBase]: 15/188 cut-off events. [2023-08-03 21:55:14,331 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:55:14,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 188 events. 15/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 342 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 139. Up to 6 conditions per place. [2023-08-03 21:55:14,338 INFO L119 LiptonReduction]: Number of co-enabled transitions 11780 [2023-08-03 21:55:18,575 INFO L134 LiptonReduction]: Checked pairs total: 24029 [2023-08-03 21:55:18,576 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-03 21:55:18,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:55:18,578 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;@50533a3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:55:18,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:55:18,583 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:55:18,583 INFO L124 PetriNetUnfolderBase]: 6/44 cut-off events. [2023-08-03 21:55:18,583 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:55:18,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:18,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:55:18,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:18,584 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:18,584 INFO L85 PathProgramCache]: Analyzing trace with hash 440453578, now seen corresponding path program 1 times [2023-08-03 21:55:18,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:18,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843160462] [2023-08-03 21:55:18,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:18,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:18,691 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 21:55:18,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843160462] [2023-08-03 21:55:18,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843160462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:18,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:18,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:55:18,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053694919] [2023-08-03 21:55:18,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:18,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:55:18,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:18,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:55:18,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:55:18,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 288 [2023-08-03 21:55:18,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 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 21:55:18,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:18,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 288 [2023-08-03 21:55:18,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:19,058 INFO L124 PetriNetUnfolderBase]: 1602/3014 cut-off events. [2023-08-03 21:55:19,058 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-03 21:55:19,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5429 conditions, 3014 events. 1602/3014 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19009 event pairs, 375 based on Foata normal form. 0/2334 useless extension candidates. Maximal degree in co-relation 4815. Up to 1630 conditions per place. [2023-08-03 21:55:19,076 INFO L140 encePairwiseOnDemand]: 276/288 looper letters, 73 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2023-08-03 21:55:19,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 100 transitions, 384 flow [2023-08-03 21:55:19,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:55:19,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:55:19,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 736 transitions. [2023-08-03 21:55:19,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-08-03 21:55:19,080 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 736 transitions. [2023-08-03 21:55:19,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 736 transitions. [2023-08-03 21:55:19,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:19,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 736 transitions. [2023-08-03 21:55:19,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 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 21:55:19,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 21:55:19,085 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 21:55:19,086 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 128 flow. Second operand 5 states and 736 transitions. [2023-08-03 21:55:19,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 100 transitions, 384 flow [2023-08-03 21:55:19,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 100 transitions, 382 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 21:55:19,090 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 192 flow [2023-08-03 21:55:19,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2023-08-03 21:55:19,091 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2023-08-03 21:55:19,091 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 192 flow [2023-08-03 21:55:19,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 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 21:55:19,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:19,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:55:19,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:55:19,092 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:19,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:19,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1511436345, now seen corresponding path program 1 times [2023-08-03 21:55:19,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:19,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222323478] [2023-08-03 21:55:19,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:19,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:19,213 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 21:55:19,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:19,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222323478] [2023-08-03 21:55:19,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222323478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:19,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:19,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:55:19,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284544699] [2023-08-03 21:55:19,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:19,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:55:19,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:55:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:55:19,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2023-08-03 21:55:19,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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 21:55:19,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:19,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2023-08-03 21:55:19,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:19,588 INFO L124 PetriNetUnfolderBase]: 2041/3729 cut-off events. [2023-08-03 21:55:19,588 INFO L125 PetriNetUnfolderBase]: For 1024/1046 co-relation queries the response was YES. [2023-08-03 21:55:19,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7707 conditions, 3729 events. 2041/3729 cut-off events. For 1024/1046 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 23927 event pairs, 427 based on Foata normal form. 94/3206 useless extension candidates. Maximal degree in co-relation 4107. Up to 2543 conditions per place. [2023-08-03 21:55:19,612 INFO L140 encePairwiseOnDemand]: 283/288 looper letters, 58 selfloop transitions, 3 changer transitions 0/83 dead transitions. [2023-08-03 21:55:19,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 83 transitions, 387 flow [2023-08-03 21:55:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:55:19,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:55:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 457 transitions. [2023-08-03 21:55:19,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289351851851852 [2023-08-03 21:55:19,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 457 transitions. [2023-08-03 21:55:19,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 457 transitions. [2023-08-03 21:55:19,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:19,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 457 transitions. [2023-08-03 21:55:19,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 21:55:19,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 21:55:19,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 21:55:19,623 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 192 flow. Second operand 3 states and 457 transitions. [2023-08-03 21:55:19,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 83 transitions, 387 flow [2023-08-03 21:55:19,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 83 transitions, 387 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:55:19,630 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 213 flow [2023-08-03 21:55:19,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=213, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2023-08-03 21:55:19,632 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-08-03 21:55:19,633 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 213 flow [2023-08-03 21:55:19,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 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 21:55:19,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:19,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:55:19,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:55:19,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:19,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:19,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1011828470, now seen corresponding path program 1 times [2023-08-03 21:55:19,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:19,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34799237] [2023-08-03 21:55:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:19,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:19,786 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 21:55:19,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:19,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34799237] [2023-08-03 21:55:19,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34799237] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:19,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:19,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:55:19,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605769056] [2023-08-03 21:55:19,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:19,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:55:19,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:19,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:55:19,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:55:19,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 288 [2023-08-03 21:55:19,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 213 flow. Second operand has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 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 21:55:19,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:19,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 288 [2023-08-03 21:55:19,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:20,440 INFO L124 PetriNetUnfolderBase]: 3072/5488 cut-off events. [2023-08-03 21:55:20,440 INFO L125 PetriNetUnfolderBase]: For 1503/1537 co-relation queries the response was YES. [2023-08-03 21:55:20,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11771 conditions, 5488 events. 3072/5488 cut-off events. For 1503/1537 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 35877 event pairs, 671 based on Foata normal form. 22/4559 useless extension candidates. Maximal degree in co-relation 7727. Up to 2748 conditions per place. [2023-08-03 21:55:20,485 INFO L140 encePairwiseOnDemand]: 280/288 looper letters, 114 selfloop transitions, 8 changer transitions 0/143 dead transitions. [2023-08-03 21:55:20,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 143 transitions, 698 flow [2023-08-03 21:55:20,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:55:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:55:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 874 transitions. [2023-08-03 21:55:20,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057870370370371 [2023-08-03 21:55:20,488 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 874 transitions. [2023-08-03 21:55:20,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 874 transitions. [2023-08-03 21:55:20,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:20,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 874 transitions. [2023-08-03 21:55:20,491 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.66666666666666) internal successors, (874), 6 states have internal predecessors, (874), 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 21:55:20,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 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 21:55:20,495 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 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 21:55:20,495 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 213 flow. Second operand 6 states and 874 transitions. [2023-08-03 21:55:20,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 143 transitions, 698 flow [2023-08-03 21:55:20,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 143 transitions, 694 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:55:20,500 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 258 flow [2023-08-03 21:55:20,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2023-08-03 21:55:20,501 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 18 predicate places. [2023-08-03 21:55:20,501 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 258 flow [2023-08-03 21:55:20,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 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 21:55:20,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:20,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:55:20,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 21:55:20,502 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:20,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:20,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1614561468, now seen corresponding path program 1 times [2023-08-03 21:55:20,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:20,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197805012] [2023-08-03 21:55:20,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:20,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:55:20,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:20,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197805012] [2023-08-03 21:55:20,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197805012] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:20,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:20,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:55:20,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886435945] [2023-08-03 21:55:20,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:20,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:55:20,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:55:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:55:20,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 288 [2023-08-03 21:55:20,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 21:55:20,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:20,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 288 [2023-08-03 21:55:20,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:21,298 INFO L124 PetriNetUnfolderBase]: 3658/7190 cut-off events. [2023-08-03 21:55:21,299 INFO L125 PetriNetUnfolderBase]: For 2104/2138 co-relation queries the response was YES. [2023-08-03 21:55:21,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 7190 events. 3658/7190 cut-off events. For 2104/2138 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 54340 event pairs, 1776 based on Foata normal form. 34/6032 useless extension candidates. Maximal degree in co-relation 10033. Up to 3604 conditions per place. [2023-08-03 21:55:21,438 INFO L140 encePairwiseOnDemand]: 285/288 looper letters, 68 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2023-08-03 21:55:21,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 100 transitions, 497 flow [2023-08-03 21:55:21,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:55:21,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:55:21,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-03 21:55:21,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2023-08-03 21:55:21,440 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-03 21:55:21,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-03 21:55:21,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:21,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-03 21:55:21,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 21:55:21,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 21:55:21,445 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 21:55:21,445 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 258 flow. Second operand 3 states and 465 transitions. [2023-08-03 21:55:21,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 100 transitions, 497 flow [2023-08-03 21:55:21,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:55:21,453 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 269 flow [2023-08-03 21:55:21,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=269, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2023-08-03 21:55:21,455 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 20 predicate places. [2023-08-03 21:55:21,455 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 269 flow [2023-08-03 21:55:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 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 21:55:21,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:21,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:55:21,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:55:21,456 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:21,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash -547698110, now seen corresponding path program 1 times [2023-08-03 21:55:21,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:21,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111569902] [2023-08-03 21:55:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:21,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:21,532 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 21:55:21,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:21,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111569902] [2023-08-03 21:55:21,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111569902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:21,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:21,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:55:21,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103280492] [2023-08-03 21:55:21,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:21,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:55:21,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:21,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:55:21,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:55:21,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 288 [2023-08-03 21:55:21,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 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 21:55:21,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:21,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 288 [2023-08-03 21:55:21,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:23,010 INFO L124 PetriNetUnfolderBase]: 6754/12574 cut-off events. [2023-08-03 21:55:23,010 INFO L125 PetriNetUnfolderBase]: For 3186/3212 co-relation queries the response was YES. [2023-08-03 21:55:23,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27614 conditions, 12574 events. 6754/12574 cut-off events. For 3186/3212 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 95992 event pairs, 1508 based on Foata normal form. 74/11118 useless extension candidates. Maximal degree in co-relation 19015. Up to 3979 conditions per place. [2023-08-03 21:55:23,094 INFO L140 encePairwiseOnDemand]: 281/288 looper letters, 113 selfloop transitions, 9 changer transitions 2/151 dead transitions. [2023-08-03 21:55:23,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 151 transitions, 766 flow [2023-08-03 21:55:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:55:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:55:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 753 transitions. [2023-08-03 21:55:23,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2023-08-03 21:55:23,097 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 753 transitions. [2023-08-03 21:55:23,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 753 transitions. [2023-08-03 21:55:23,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:23,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 753 transitions. [2023-08-03 21:55:23,099 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.6) internal successors, (753), 5 states have internal predecessors, (753), 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 21:55:23,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 21:55:23,101 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 21:55:23,101 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 269 flow. Second operand 5 states and 753 transitions. [2023-08-03 21:55:23,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 151 transitions, 766 flow [2023-08-03 21:55:23,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 151 transitions, 750 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:55:23,117 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 345 flow [2023-08-03 21:55:23,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=345, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2023-08-03 21:55:23,119 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 26 predicate places. [2023-08-03 21:55:23,119 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 345 flow [2023-08-03 21:55:23,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 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 21:55:23,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:23,122 INFO L208 CegarLoopForPetriNet]: trace histogram [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 21:55:23,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 21:55:23,122 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:23,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:23,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1098237715, now seen corresponding path program 1 times [2023-08-03 21:55:23,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:23,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669695940] [2023-08-03 21:55:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:23,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:55:23,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:23,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669695940] [2023-08-03 21:55:23,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669695940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:23,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:23,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:55:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145061112] [2023-08-03 21:55:23,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:23,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:55:23,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:55:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:55:23,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 288 [2023-08-03 21:55:23,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 345 flow. Second operand has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 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 21:55:23,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:23,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 288 [2023-08-03 21:55:23,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:24,971 INFO L124 PetriNetUnfolderBase]: 9474/17914 cut-off events. [2023-08-03 21:55:24,971 INFO L125 PetriNetUnfolderBase]: For 11146/11296 co-relation queries the response was YES. [2023-08-03 21:55:25,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42197 conditions, 17914 events. 9474/17914 cut-off events. For 11146/11296 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 145295 event pairs, 2211 based on Foata normal form. 322/16670 useless extension candidates. Maximal degree in co-relation 25972. Up to 5502 conditions per place. [2023-08-03 21:55:25,059 INFO L140 encePairwiseOnDemand]: 281/288 looper letters, 90 selfloop transitions, 11 changer transitions 40/168 dead transitions. [2023-08-03 21:55:25,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 168 transitions, 1001 flow [2023-08-03 21:55:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:55:25,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:55:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-08-03 21:55:25,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2023-08-03 21:55:25,062 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-08-03 21:55:25,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-08-03 21:55:25,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:25,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-08-03 21:55:25,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 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 21:55:25,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 21:55:25,067 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 288.0) internal successors, (1728), 6 states have internal predecessors, (1728), 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 21:55:25,067 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 345 flow. Second operand 5 states and 745 transitions. [2023-08-03 21:55:25,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 168 transitions, 1001 flow [2023-08-03 21:55:25,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 168 transitions, 989 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-03 21:55:25,084 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 429 flow [2023-08-03 21:55:25,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=429, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2023-08-03 21:55:25,085 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 34 predicate places. [2023-08-03 21:55:25,085 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 429 flow [2023-08-03 21:55:25,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 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 21:55:25,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:25,086 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-03 21:55:25,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 21:55:25,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:25,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash 762873939, now seen corresponding path program 1 times [2023-08-03 21:55:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:25,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713292261] [2023-08-03 21:55:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:25,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:55:25,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:25,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713292261] [2023-08-03 21:55:25,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713292261] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:25,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:25,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:55:25,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497196543] [2023-08-03 21:55:25,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:25,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:55:25,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:25,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:55:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 21:55:25,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 288 [2023-08-03 21:55:25,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 429 flow. Second operand has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 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 21:55:25,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:25,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 288 [2023-08-03 21:55:25,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:27,238 INFO L124 PetriNetUnfolderBase]: 11088/20164 cut-off events. [2023-08-03 21:55:27,238 INFO L125 PetriNetUnfolderBase]: For 18520/18604 co-relation queries the response was YES. [2023-08-03 21:55:27,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52171 conditions, 20164 events. 11088/20164 cut-off events. For 18520/18604 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 157141 event pairs, 1367 based on Foata normal form. 256/18682 useless extension candidates. Maximal degree in co-relation 26217. Up to 14221 conditions per place. [2023-08-03 21:55:27,405 INFO L140 encePairwiseOnDemand]: 283/288 looper letters, 102 selfloop transitions, 5 changer transitions 5/139 dead transitions. [2023-08-03 21:55:27,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 139 transitions, 905 flow [2023-08-03 21:55:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:55:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:55:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 618 transitions. [2023-08-03 21:55:27,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364583333333334 [2023-08-03 21:55:27,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 618 transitions. [2023-08-03 21:55:27,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 618 transitions. [2023-08-03 21:55:27,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:27,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 618 transitions. [2023-08-03 21:55:27,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 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 21:55:27,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 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 21:55:27,426 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 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 21:55:27,427 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 429 flow. Second operand 4 states and 618 transitions. [2023-08-03 21:55:27,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 139 transitions, 905 flow [2023-08-03 21:55:27,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 905 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:55:27,467 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 453 flow [2023-08-03 21:55:27,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=453, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-08-03 21:55:27,467 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 37 predicate places. [2023-08-03 21:55:27,468 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 453 flow [2023-08-03 21:55:27,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 137.5) internal successors, (550), 4 states have internal predecessors, (550), 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 21:55:27,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:27,468 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-03 21:55:27,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 21:55:27,468 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:27,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash 314995957, now seen corresponding path program 1 times [2023-08-03 21:55:27,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:27,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118890430] [2023-08-03 21:55:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:27,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:55:27,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118890430] [2023-08-03 21:55:27,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118890430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:55:27,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713376022] [2023-08-03 21:55:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:27,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:55:27,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:55:27,710 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 21:55:27,717 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 21:55:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:27,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-03 21:55:27,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:55:27,922 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 21:55:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:55:27,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:55:27,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713376022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:27,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:55:27,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2023-08-03 21:55:27,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797901504] [2023-08-03 21:55:27,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:27,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 21:55:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:27,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 21:55:27,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-08-03 21:55:27,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 288 [2023-08-03 21:55:27,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 453 flow. Second operand has 4 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 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 21:55:27,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:27,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 288 [2023-08-03 21:55:27,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:30,097 INFO L124 PetriNetUnfolderBase]: 11077/20078 cut-off events. [2023-08-03 21:55:30,097 INFO L125 PetriNetUnfolderBase]: For 21951/22091 co-relation queries the response was YES. [2023-08-03 21:55:30,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54221 conditions, 20078 events. 11077/20078 cut-off events. For 21951/22091 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 155511 event pairs, 2669 based on Foata normal form. 40/18323 useless extension candidates. Maximal degree in co-relation 37024. Up to 15856 conditions per place. [2023-08-03 21:55:30,205 INFO L140 encePairwiseOnDemand]: 280/288 looper letters, 83 selfloop transitions, 11 changer transitions 1/122 dead transitions. [2023-08-03 21:55:30,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 122 transitions, 818 flow [2023-08-03 21:55:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:55:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:55:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 599 transitions. [2023-08-03 21:55:30,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199652777777778 [2023-08-03 21:55:30,207 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 599 transitions. [2023-08-03 21:55:30,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 599 transitions. [2023-08-03 21:55:30,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:30,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 599 transitions. [2023-08-03 21:55:30,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.75) internal successors, (599), 4 states have internal predecessors, (599), 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 21:55:30,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 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 21:55:30,211 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 288.0) internal successors, (1440), 5 states have internal predecessors, (1440), 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 21:55:30,211 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 453 flow. Second operand 4 states and 599 transitions. [2023-08-03 21:55:30,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 122 transitions, 818 flow [2023-08-03 21:55:30,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 122 transitions, 806 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 21:55:30,240 INFO L231 Difference]: Finished difference. Result has 93 places, 95 transitions, 531 flow [2023-08-03 21:55:30,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=443, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=531, PETRI_PLACES=93, PETRI_TRANSITIONS=95} [2023-08-03 21:55:30,241 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 40 predicate places. [2023-08-03 21:55:30,241 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 95 transitions, 531 flow [2023-08-03 21:55:30,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 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 21:55:30,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:30,241 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-03 21:55:30,251 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 21:55:30,452 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,SelfDestructingSolverStorable9 [2023-08-03 21:55:30,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:30,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:30,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1219336998, now seen corresponding path program 1 times [2023-08-03 21:55:30,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:30,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642374513] [2023-08-03 21:55:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:30,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:55:30,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:30,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642374513] [2023-08-03 21:55:30,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642374513] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:30,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:30,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 21:55:30,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667821022] [2023-08-03 21:55:30,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:30,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:55:30,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:30,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:55:30,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:55:30,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 288 [2023-08-03 21:55:30,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 95 transitions, 531 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 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 21:55:30,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:30,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 288 [2023-08-03 21:55:30,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:32,832 INFO L124 PetriNetUnfolderBase]: 11536/22735 cut-off events. [2023-08-03 21:55:32,832 INFO L125 PetriNetUnfolderBase]: For 23722/24388 co-relation queries the response was YES. [2023-08-03 21:55:32,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60640 conditions, 22735 events. 11536/22735 cut-off events. For 23722/24388 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 196421 event pairs, 5157 based on Foata normal form. 155/22390 useless extension candidates. Maximal degree in co-relation 41137. Up to 11460 conditions per place. [2023-08-03 21:55:32,926 INFO L140 encePairwiseOnDemand]: 285/288 looper letters, 87 selfloop transitions, 3 changer transitions 1/128 dead transitions. [2023-08-03 21:55:32,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 868 flow [2023-08-03 21:55:32,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:55:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:55:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-03 21:55:32,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2023-08-03 21:55:32,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-03 21:55:32,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-03 21:55:32,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:32,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-03 21:55:32,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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 21:55:32,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 21:55:32,933 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 21:55:32,933 INFO L175 Difference]: Start difference. First operand has 93 places, 95 transitions, 531 flow. Second operand 3 states and 465 transitions. [2023-08-03 21:55:32,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 128 transitions, 868 flow [2023-08-03 21:55:32,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 128 transitions, 863 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:55:32,966 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 564 flow [2023-08-03 21:55:32,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=564, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2023-08-03 21:55:32,968 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 43 predicate places. [2023-08-03 21:55:32,968 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 564 flow [2023-08-03 21:55:32,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 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 21:55:32,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:32,969 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-03 21:55:32,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 21:55:32,969 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:32,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash -2134391673, now seen corresponding path program 2 times [2023-08-03 21:55:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:32,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125096870] [2023-08-03 21:55:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:32,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:55:33,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:33,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125096870] [2023-08-03 21:55:33,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125096870] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:33,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:33,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 21:55:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498472607] [2023-08-03 21:55:33,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:33,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:55:33,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:33,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:55:33,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:55:33,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 288 [2023-08-03 21:55:33,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 564 flow. Second operand has 3 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 21:55:33,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:33,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 288 [2023-08-03 21:55:33,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:35,160 INFO L124 PetriNetUnfolderBase]: 11819/22933 cut-off events. [2023-08-03 21:55:35,160 INFO L125 PetriNetUnfolderBase]: For 27082/27715 co-relation queries the response was YES. [2023-08-03 21:55:35,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62574 conditions, 22933 events. 11819/22933 cut-off events. For 27082/27715 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 194921 event pairs, 3366 based on Foata normal form. 158/22593 useless extension candidates. Maximal degree in co-relation 42519. Up to 16460 conditions per place. [2023-08-03 21:55:35,263 INFO L140 encePairwiseOnDemand]: 285/288 looper letters, 65 selfloop transitions, 3 changer transitions 6/105 dead transitions. [2023-08-03 21:55:35,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 105 transitions, 745 flow [2023-08-03 21:55:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:55:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:55:35,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-03 21:55:35,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-03 21:55:35,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-03 21:55:35,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-03 21:55:35,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:35,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-03 21:55:35,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 21:55:35,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 21:55:35,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 288.0) internal successors, (1152), 4 states have internal predecessors, (1152), 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 21:55:35,272 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 564 flow. Second operand 3 states and 450 transitions. [2023-08-03 21:55:35,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 105 transitions, 745 flow [2023-08-03 21:55:35,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 105 transitions, 739 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:55:35,322 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 526 flow [2023-08-03 21:55:35,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=526, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2023-08-03 21:55:35,323 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 43 predicate places. [2023-08-03 21:55:35,323 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 526 flow [2023-08-03 21:55:35,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 21:55:35,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:35,324 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-03 21:55:35,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 21:55:35,324 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:35,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash -327263421, now seen corresponding path program 1 times [2023-08-03 21:55:35,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:35,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187898957] [2023-08-03 21:55:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:35,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 21:55:35,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:35,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187898957] [2023-08-03 21:55:35,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187898957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:55:35,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:55:35,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 21:55:35,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830688555] [2023-08-03 21:55:35,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:55:35,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 21:55:35,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 21:55:35,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:55:35,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 288 [2023-08-03 21:55:35,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 526 flow. Second operand has 6 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 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 21:55:35,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:35,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 288 [2023-08-03 21:55:35,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:38,120 INFO L124 PetriNetUnfolderBase]: 11814/23273 cut-off events. [2023-08-03 21:55:38,120 INFO L125 PetriNetUnfolderBase]: For 25342/25895 co-relation queries the response was YES. [2023-08-03 21:55:38,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62242 conditions, 23273 events. 11814/23273 cut-off events. For 25342/25895 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 200596 event pairs, 2181 based on Foata normal form. 212/23098 useless extension candidates. Maximal degree in co-relation 27052. Up to 9622 conditions per place. [2023-08-03 21:55:38,211 INFO L140 encePairwiseOnDemand]: 281/288 looper letters, 84 selfloop transitions, 5 changer transitions 48/164 dead transitions. [2023-08-03 21:55:38,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 164 transitions, 1113 flow [2023-08-03 21:55:38,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 21:55:38,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 21:55:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 849 transitions. [2023-08-03 21:55:38,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4913194444444444 [2023-08-03 21:55:38,214 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 849 transitions. [2023-08-03 21:55:38,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 849 transitions. [2023-08-03 21:55:38,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:38,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 849 transitions. [2023-08-03 21:55:38,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 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 21:55:38,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 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 21:55:38,219 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 288.0) internal successors, (2016), 7 states have internal predecessors, (2016), 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 21:55:38,219 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 526 flow. Second operand 6 states and 849 transitions. [2023-08-03 21:55:38,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 164 transitions, 1113 flow [2023-08-03 21:55:38,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 164 transitions, 1110 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:55:38,250 INFO L231 Difference]: Finished difference. Result has 100 places, 83 transitions, 455 flow [2023-08-03 21:55:38,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=455, PETRI_PLACES=100, PETRI_TRANSITIONS=83} [2023-08-03 21:55:38,251 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 47 predicate places. [2023-08-03 21:55:38,251 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 83 transitions, 455 flow [2023-08-03 21:55:38,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 128.0) internal successors, (768), 6 states have internal predecessors, (768), 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 21:55:38,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:55:38,251 INFO L208 CegarLoopForPetriNet]: trace histogram [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] [2023-08-03 21:55:38,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 21:55:38,251 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:55:38,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:55:38,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2030501349, now seen corresponding path program 3 times [2023-08-03 21:55:38,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:55:38,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312247064] [2023-08-03 21:55:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:55:38,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:55:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:55:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:55:38,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:55:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312247064] [2023-08-03 21:55:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312247064] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:55:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677387519] [2023-08-03 21:55:38,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 21:55:38,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:55:38,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:55:38,590 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 21:55:38,593 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 21:55:38,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-03 21:55:38,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 21:55:38,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-03 21:55:38,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:55:38,757 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-03 21:55:38,758 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-03 21:55:38,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 21:55:38,851 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 21:55:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:55:38,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:55:38,921 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_287 (Array Int Int))) (not (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_287) |c_~#m2~0.base|) |c_~#m2~0.offset|)))) is different from false [2023-08-03 21:55:38,950 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 21:55:38,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 20 [2023-08-03 21:55:38,956 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2023-08-03 21:55:38,960 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-03 21:55:38,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-03 21:55:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677387519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:55:38,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:55:38,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 13 [2023-08-03 21:55:38,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277977840] [2023-08-03 21:55:38,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:55:38,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-03 21:55:38,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:55:38,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-03 21:55:38,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=126, Unknown=1, NotChecked=22, Total=182 [2023-08-03 21:55:39,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 288 [2023-08-03 21:55:39,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 83 transitions, 455 flow. Second operand has 14 states, 14 states have (on average 113.28571428571429) internal successors, (1586), 14 states have internal predecessors, (1586), 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 21:55:39,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:55:39,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 288 [2023-08-03 21:55:39,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:55:39,435 INFO L124 PetriNetUnfolderBase]: 352/882 cut-off events. [2023-08-03 21:55:39,435 INFO L125 PetriNetUnfolderBase]: For 958/965 co-relation queries the response was YES. [2023-08-03 21:55:39,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2680 conditions, 882 events. 352/882 cut-off events. For 958/965 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 4410 event pairs, 25 based on Foata normal form. 30/911 useless extension candidates. Maximal degree in co-relation 2654. Up to 375 conditions per place. [2023-08-03 21:55:39,438 INFO L140 encePairwiseOnDemand]: 277/288 looper letters, 0 selfloop transitions, 0 changer transitions 112/112 dead transitions. [2023-08-03 21:55:39,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 112 transitions, 787 flow [2023-08-03 21:55:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-03 21:55:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-03 21:55:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1405 transitions. [2023-08-03 21:55:39,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40653935185185186 [2023-08-03 21:55:39,442 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1405 transitions. [2023-08-03 21:55:39,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1405 transitions. [2023-08-03 21:55:39,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:55:39,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1405 transitions. [2023-08-03 21:55:39,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.08333333333333) internal successors, (1405), 12 states have internal predecessors, (1405), 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 21:55:39,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 288.0) internal successors, (3744), 13 states have internal predecessors, (3744), 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 21:55:39,451 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 288.0) internal successors, (3744), 13 states have internal predecessors, (3744), 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 21:55:39,451 INFO L175 Difference]: Start difference. First operand has 100 places, 83 transitions, 455 flow. Second operand 12 states and 1405 transitions. [2023-08-03 21:55:39,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 112 transitions, 787 flow [2023-08-03 21:55:39,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 112 transitions, 715 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-08-03 21:55:39,455 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-08-03 21:55:39,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=288, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-08-03 21:55:39,456 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 21 predicate places. [2023-08-03 21:55:39,456 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-08-03 21:55:39,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 113.28571428571429) internal successors, (1586), 14 states have internal predecessors, (1586), 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 21:55:39,457 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 21:55:39,457 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:55:39,457 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 21:55:39,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 21:55:39,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:55:39,669 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:55:39,670 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (2/2) [2023-08-03 21:55:39,672 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:55:39,672 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:55:39,677 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:55:39 BasicIcfg [2023-08-03 21:55:39,677 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:55:39,678 INFO L158 Benchmark]: Toolchain (without parser) took 38125.75ms. Allocated memory was 348.1MB in the beginning and 8.5GB in the end (delta: 8.2GB). Free memory was 295.3MB in the beginning and 7.0GB in the end (delta: -6.7GB). Peak memory consumption was 1.5GB. Max. memory is 16.0GB. [2023-08-03 21:55:39,678 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 348.1MB. Free memory was 301.7MB in the beginning and 301.5MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:55:39,679 INFO L158 Benchmark]: CACSL2BoogieTranslator took 430.64ms. Allocated memory is still 348.1MB. Free memory was 295.3MB in the beginning and 274.6MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 21:55:39,679 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.47ms. Allocated memory is still 348.1MB. Free memory was 274.6MB in the beginning and 272.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:55:39,679 INFO L158 Benchmark]: Boogie Preprocessor took 33.64ms. Allocated memory is still 348.1MB. Free memory was 272.2MB in the beginning and 270.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:55:39,679 INFO L158 Benchmark]: RCFGBuilder took 669.68ms. Allocated memory was 348.1MB in the beginning and 541.1MB in the end (delta: 192.9MB). Free memory was 270.2MB in the beginning and 481.2MB in the end (delta: -211.0MB). Peak memory consumption was 17.3MB. Max. memory is 16.0GB. [2023-08-03 21:55:39,680 INFO L158 Benchmark]: TraceAbstraction took 36927.62ms. Allocated memory was 541.1MB in the beginning and 8.5GB in the end (delta: 8.0GB). Free memory was 480.5MB in the beginning and 7.0GB in the end (delta: -6.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.0GB. [2023-08-03 21:55:39,684 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 348.1MB. Free memory was 301.7MB in the beginning and 301.5MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 430.64ms. Allocated memory is still 348.1MB. Free memory was 295.3MB in the beginning and 274.6MB in the end (delta: 20.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.47ms. Allocated memory is still 348.1MB. Free memory was 274.6MB in the beginning and 272.2MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.64ms. Allocated memory is still 348.1MB. Free memory was 272.2MB in the beginning and 270.2MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 669.68ms. Allocated memory was 348.1MB in the beginning and 541.1MB in the end (delta: 192.9MB). Free memory was 270.2MB in the beginning and 481.2MB in the end (delta: -211.0MB). Peak memory consumption was 17.3MB. Max. memory is 16.0GB. * TraceAbstraction took 36927.62ms. Allocated memory was 541.1MB in the beginning and 8.5GB in the end (delta: 8.0GB). Free memory was 480.5MB in the beginning and 7.0GB in the end (delta: -6.5GB). Peak memory consumption was 1.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 256]: Unsoundness Warning unspecified type, defaulting to int C: short [256] - GenericResultAtLocation [Line: 256]: Unsoundness Warning unspecified type, defaulting to int C: short [256] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 96 PlacesBefore, 17 PlacesAfterwards, 100 TransitionsBefore, 17 TransitionsAfterwards, 1984 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 59 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 4 ChoiceCompositions, 99 TotalNumberOfCompositions, 1726 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1518, independent: 1471, independent conditional: 0, independent unconditional: 1471, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1073, independent: 1049, independent conditional: 0, independent unconditional: 1049, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1518, independent: 422, independent conditional: 0, independent unconditional: 422, dependent: 23, dependent conditional: 0, dependent unconditional: 23, unknown: 1073, unknown conditional: 0, unknown unconditional: 1073] , Statistics on independence cache: Total cache size (in pairs): 26, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.7s, 155 PlacesBefore, 53 PlacesAfterwards, 163 TransitionsBefore, 58 TransitionsAfterwards, 11780 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 79 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 3 ChoiceCompositions, 125 TotalNumberOfCompositions, 23811 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10674, independent: 10291, independent conditional: 0, independent unconditional: 10291, dependent: 383, dependent conditional: 0, dependent unconditional: 383, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5875, independent: 5809, independent conditional: 0, independent unconditional: 5809, dependent: 66, dependent conditional: 0, dependent unconditional: 66, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10674, independent: 4482, independent conditional: 0, independent unconditional: 4482, dependent: 317, dependent conditional: 0, dependent unconditional: 317, unknown: 5875, unknown conditional: 0, unknown unconditional: 5875] , Statistics on independence cache: Total cache size (in pairs): 358, Positive cache size: 326, Positive conditional cache size: 0, Positive unconditional cache size: 326, Negative cache size: 32, Negative conditional cache size: 0, Negative unconditional cache size: 32, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 155 PlacesBefore, 53 PlacesAfterwards, 163 TransitionsBefore, 58 TransitionsAfterwards, 11780 CoEnabledTransitionPairs, 5 FixpointIterations, 20 TrivialSequentialCompositions, 79 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 3 ChoiceCompositions, 125 TotalNumberOfCompositions, 24029 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11676, independent: 11289, independent conditional: 0, independent unconditional: 11289, dependent: 387, dependent conditional: 0, dependent unconditional: 387, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5966, independent: 5898, independent conditional: 0, independent unconditional: 5898, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 11676, independent: 5391, independent conditional: 0, independent unconditional: 5391, dependent: 319, dependent conditional: 0, dependent unconditional: 319, unknown: 5966, unknown conditional: 0, unknown unconditional: 5966] , Statistics on independence cache: Total cache size (in pairs): 414, Positive cache size: 381, Positive conditional cache size: 0, Positive unconditional cache size: 381, Negative cache size: 33, Negative conditional cache size: 0, Negative unconditional cache size: 33, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 749]: 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 for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 151 locations, 3 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: 5.6s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.4s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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 for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 208 locations, 4 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: 5.8s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 78 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 76 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 134 IncrementalHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 134 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=128occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 111 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 11/16 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 1 thread instances CFG has 4 procedures, 208 locations, 4 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: 25.4s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 18.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 832 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 695 mSDsluCounter, 240 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 96 IncrementalHoareTripleChecker+Unchecked, 171 mSDsCounter, 77 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2044 IncrementalHoareTripleChecker+Invalid, 2217 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 77 mSolverCounterUnsat, 69 mSDtfsCounter, 2044 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=564occurred in iteration=9, InterpolantAutomatonStates: 59, 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, 1.6s InterpolantComputationTime, 330 NumberOfCodeBlocks, 330 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 343 ConstructedInterpolants, 3 QuantifiedInterpolants, 1066 SizeOfPredicates, 11 NumberOfNonLiveVariables, 586 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 15 InterpolantComputations, 11 PerfectInterpolantSequences, 16/22 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 21:55:39,717 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...