/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-lit_sssc12_variant_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:00:02,352 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:00:02,437 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:00:02,441 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:00:02,442 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:00:02,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:00:02,443 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:00:02,473 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:00:02,474 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:00:02,478 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:00:02,478 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:00:02,479 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:00:02,480 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:00:02,481 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:00:02,481 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:00:02,482 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:00:02,482 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:00:02,482 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:00:02,482 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:00:02,482 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:00:02,483 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:00:02,483 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:00:02,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:00:02,483 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:00:02,484 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:00:02,484 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:00:02,484 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:00:02,485 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:00:02,485 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:00:02,485 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:00:02,486 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:00:02,486 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:00:02,486 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:00:02,486 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:00:02,487 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:00:02,487 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:00:02,487 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:00:02,487 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:00:02,487 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:00:02,487 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:00:02,487 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:00:02,488 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:00:02,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:00:02,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:00:02,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:00:02,715 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:00:02,716 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:00:02,717 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_variant_bound2.i [2023-08-03 22:00:03,787 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:00:03,977 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:00:03,978 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-lit_sssc12_variant_bound2.i [2023-08-03 22:00:03,993 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddaff012c/3b276685cb3f4ac29c06e169f8bf5755/FLAG76564d5a1 [2023-08-03 22:00:04,006 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddaff012c/3b276685cb3f4ac29c06e169f8bf5755 [2023-08-03 22:00:04,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:00:04,009 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:00:04,010 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:00:04,010 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:00:04,013 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:00:04,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@317a5873 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04, skipping insertion in model container [2023-08-03 22:00:04,015 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,071 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:00:04,509 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-lit_sssc12_variant_bound2.i[46865,46878] [2023-08-03 22:00:04,526 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:00:04,535 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:00:04,565 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 22:00:04,567 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-03 22:00:04,586 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-lit_sssc12_variant_bound2.i[46865,46878] [2023-08-03 22:00:04,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:00:04,658 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 22:00:04,658 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 22:00:04,664 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:00:04,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04 WrapperNode [2023-08-03 22:00:04,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:00:04,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:00:04,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:00:04,667 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:00:04,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,733 INFO L138 Inliner]: procedures = 275, calls = 25, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 92 [2023-08-03 22:00:04,733 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:00:04,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:00:04,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:00:04,734 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:00:04,743 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,743 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,752 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,753 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,767 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:00:04,778 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:00:04,778 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:00:04,778 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:00:04,779 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (1/1) ... [2023-08-03 22:00:04,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:00:04,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:00:04,811 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 22:00:04,854 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 22:00:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 22:00:04,880 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-08-03 22:00:04,881 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-08-03 22:00:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:00:04,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:00:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 22:00:04,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:00:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:00:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-03 22:00:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:00:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:00:04,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:00:04,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:00:04,885 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 22:00:04,990 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:00:04,991 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:00:05,175 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:00:05,208 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:00:05,209 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 22:00:05,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:00:05 BoogieIcfgContainer [2023-08-03 22:00:05,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:00:05,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:00:05,213 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:00:05,215 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:00:05,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:00:04" (1/3) ... [2023-08-03 22:00:05,217 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1db60d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:00:05, skipping insertion in model container [2023-08-03 22:00:05,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:00:04" (2/3) ... [2023-08-03 22:00:05,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1db60d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:00:05, skipping insertion in model container [2023-08-03 22:00:05,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:00:05" (3/3) ... [2023-08-03 22:00:05,220 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-lit_sssc12_variant_bound2.i [2023-08-03 22:00:05,227 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:00:05,233 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:00:05,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 22:00:05,233 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:00:05,280 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:00:05,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 175 flow [2023-08-03 22:00:05,358 INFO L124 PetriNetUnfolderBase]: 7/96 cut-off events. [2023-08-03 22:00:05,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:00:05,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2023-08-03 22:00:05,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 85 transitions, 175 flow [2023-08-03 22:00:05,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 85 transitions, 175 flow [2023-08-03 22:00:05,369 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:00:05,378 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 85 transitions, 175 flow [2023-08-03 22:00:05,381 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 85 transitions, 175 flow [2023-08-03 22:00:05,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 85 transitions, 175 flow [2023-08-03 22:00:05,401 INFO L124 PetriNetUnfolderBase]: 7/96 cut-off events. [2023-08-03 22:00:05,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:00:05,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 7/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 49. Up to 4 conditions per place. [2023-08-03 22:00:05,404 INFO L119 LiptonReduction]: Number of co-enabled transitions 1122 [2023-08-03 22:00:08,246 INFO L134 LiptonReduction]: Checked pairs total: 1201 [2023-08-03 22:00:08,247 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-03 22:00:08,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:00:08,263 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;@f4730c4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:00:08,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:00:08,267 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:00:08,267 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-03 22:00:08,267 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:00:08,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:08,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 22:00:08,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:00:08,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:08,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1468269204, now seen corresponding path program 1 times [2023-08-03 22:00:08,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:08,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867347901] [2023-08-03 22:00:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:08,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:00:08,403 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:00:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:00:08,457 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:00:08,459 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:00:08,460 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:00:08,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:00:08,462 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:00:08,467 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:00:08,468 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:00:08,468 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:00:08,509 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 22:00:08,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:08,562 INFO L124 PetriNetUnfolderBase]: 12/146 cut-off events. [2023-08-03 22:00:08,562 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:00:08,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 146 events. 12/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2023-08-03 22:00:08,566 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:08,568 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:08,569 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:00:08,569 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:08,570 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:08,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:08,598 INFO L124 PetriNetUnfolderBase]: 12/146 cut-off events. [2023-08-03 22:00:08,598 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:00:08,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 146 events. 12/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2023-08-03 22:00:08,602 INFO L119 LiptonReduction]: Number of co-enabled transitions 4488 [2023-08-03 22:00:11,392 INFO L134 LiptonReduction]: Checked pairs total: 9655 [2023-08-03 22:00:11,392 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-03 22:00:11,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:00:11,395 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;@f4730c4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:00:11,395 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:00:11,400 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:00:11,400 INFO L124 PetriNetUnfolderBase]: 2/31 cut-off events. [2023-08-03 22:00:11,401 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:00:11,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:11,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 22:00:11,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:00:11,402 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:11,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1902654125, now seen corresponding path program 1 times [2023-08-03 22:00:11,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:11,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505182398] [2023-08-03 22:00:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:11,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:11,573 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 22:00:11,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:11,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505182398] [2023-08-03 22:00:11,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505182398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:00:11,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620936738] [2023-08-03 22:00:11,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:11,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:00:11,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:00:11,579 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 22:00:11,581 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 22:00:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:11,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:00:11,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:00:11,720 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 22:00:11,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:00:11,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620936738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:11,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:00:11,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:00:11,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609396004] [2023-08-03 22:00:11,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:11,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:00:11,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:00:11,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:00:11,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 230 [2023-08-03 22:00:11,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 78 flow. Second operand has 5 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 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 22:00:11,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:11,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 230 [2023-08-03 22:00:11,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:11,991 INFO L124 PetriNetUnfolderBase]: 452/747 cut-off events. [2023-08-03 22:00:11,991 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-03 22:00:11,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1487 conditions, 747 events. 452/747 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3298 event pairs, 9 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 187. Up to 486 conditions per place. [2023-08-03 22:00:11,995 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-03 22:00:11,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 65 transitions, 254 flow [2023-08-03 22:00:11,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:00:12,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:00:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 559 transitions. [2023-08-03 22:00:12,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860869565217391 [2023-08-03 22:00:12,019 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 559 transitions. [2023-08-03 22:00:12,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 559 transitions. [2023-08-03 22:00:12,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:12,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 559 transitions. [2023-08-03 22:00:12,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.8) internal successors, (559), 5 states have internal predecessors, (559), 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 22:00:12,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 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 22:00:12,039 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 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 22:00:12,041 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 78 flow. Second operand 5 states and 559 transitions. [2023-08-03 22:00:12,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 65 transitions, 254 flow [2023-08-03 22:00:12,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 65 transitions, 253 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:00:12,046 INFO L231 Difference]: Finished difference. Result has 36 places, 0 transitions, 0 flow [2023-08-03 22:00:12,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=36, PETRI_TRANSITIONS=0} [2023-08-03 22:00:12,051 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 2 predicate places. [2023-08-03 22:00:12,052 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 0 transitions, 0 flow [2023-08-03 22:00:12,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 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 22:00:12,052 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:00:12,065 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 22:00:12,258 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 22:00:12,259 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:00:12,260 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:00:12,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:12,276 INFO L124 PetriNetUnfolderBase]: 12/146 cut-off events. [2023-08-03 22:00:12,276 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:00:12,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 146 events. 12/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2023-08-03 22:00:12,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:12,279 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:12,279 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:00:12,279 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:12,279 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:12,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 119 transitions, 250 flow [2023-08-03 22:00:12,292 INFO L124 PetriNetUnfolderBase]: 12/146 cut-off events. [2023-08-03 22:00:12,292 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:00:12,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 146 events. 12/146 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 251 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 97. Up to 6 conditions per place. [2023-08-03 22:00:12,295 INFO L119 LiptonReduction]: Number of co-enabled transitions 4488 [2023-08-03 22:00:15,119 INFO L134 LiptonReduction]: Checked pairs total: 9918 [2023-08-03 22:00:15,120 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-03 22:00:15,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:00:15,123 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;@f4730c4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:00:15,123 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 22:00:15,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:00:15,126 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2023-08-03 22:00:15,126 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:00:15,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:15,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:00:15,126 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:15,126 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:15,127 INFO L85 PathProgramCache]: Analyzing trace with hash 84973928, now seen corresponding path program 1 times [2023-08-03 22:00:15,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:15,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556461883] [2023-08-03 22:00:15,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:15,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:15,286 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 22:00:15,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:15,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556461883] [2023-08-03 22:00:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556461883] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:15,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:15,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:00:15,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599999072] [2023-08-03 22:00:15,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:15,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:00:15,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:00:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:00:15,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 229 [2023-08-03 22:00:15,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 22:00:15,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:15,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 229 [2023-08-03 22:00:15,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:15,465 INFO L124 PetriNetUnfolderBase]: 833/1397 cut-off events. [2023-08-03 22:00:15,466 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-03 22:00:15,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2750 conditions, 1397 events. 833/1397 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7014 event pairs, 413 based on Foata normal form. 0/987 useless extension candidates. Maximal degree in co-relation 1361. Up to 805 conditions per place. [2023-08-03 22:00:15,474 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 39 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-03 22:00:15,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 193 flow [2023-08-03 22:00:15,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:00:15,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:00:15,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-03 22:00:15,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49344978165938863 [2023-08-03 22:00:15,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-03 22:00:15,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-03 22:00:15,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:15,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-03 22:00:15,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 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 22:00:15,479 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 22:00:15,480 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 22:00:15,480 INFO L175 Difference]: Start difference. First operand has 33 places, 32 transitions, 76 flow. Second operand 3 states and 339 transitions. [2023-08-03 22:00:15,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 193 flow [2023-08-03 22:00:15,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 47 transitions, 191 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 22:00:15,482 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 82 flow [2023-08-03 22:00:15,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-08-03 22:00:15,483 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-03 22:00:15,483 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 82 flow [2023-08-03 22:00:15,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 22:00:15,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:15,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:00:15,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:00:15,484 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:15,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:15,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2143040313, now seen corresponding path program 1 times [2023-08-03 22:00:15,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:15,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425259386] [2023-08-03 22:00:15,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:15,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:15,689 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 22:00:15,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:15,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425259386] [2023-08-03 22:00:15,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425259386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:15,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:15,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:00:15,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964414528] [2023-08-03 22:00:15,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:15,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:00:15,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:15,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:00:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:00:15,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 229 [2023-08-03 22:00:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 22:00:15,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:15,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 229 [2023-08-03 22:00:15,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:15,928 INFO L124 PetriNetUnfolderBase]: 891/1554 cut-off events. [2023-08-03 22:00:15,928 INFO L125 PetriNetUnfolderBase]: For 208/208 co-relation queries the response was YES. [2023-08-03 22:00:15,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 1554 events. 891/1554 cut-off events. For 208/208 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8088 event pairs, 657 based on Foata normal form. 0/1183 useless extension candidates. Maximal degree in co-relation 1397. Up to 1306 conditions per place. [2023-08-03 22:00:15,935 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-03 22:00:15,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 195 flow [2023-08-03 22:00:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:00:15,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:00:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 326 transitions. [2023-08-03 22:00:15,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745269286754003 [2023-08-03 22:00:15,937 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 326 transitions. [2023-08-03 22:00:15,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 326 transitions. [2023-08-03 22:00:15,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:15,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 326 transitions. [2023-08-03 22:00:15,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 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 22:00:15,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 22:00:15,949 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 22:00:15,949 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 82 flow. Second operand 3 states and 326 transitions. [2023-08-03 22:00:15,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 195 flow [2023-08-03 22:00:15,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:00:15,952 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 104 flow [2023-08-03 22:00:15,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-08-03 22:00:15,954 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-03 22:00:15,954 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 104 flow [2023-08-03 22:00:15,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 22:00:15,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:15,955 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:00:15,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 22:00:15,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:15,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash 759123313, now seen corresponding path program 1 times [2023-08-03 22:00:15,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:15,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353750593] [2023-08-03 22:00:15,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:16,033 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 22:00:16,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:16,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353750593] [2023-08-03 22:00:16,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353750593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:16,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:16,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:00:16,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091945521] [2023-08-03 22:00:16,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:16,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:00:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:16,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:00:16,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:00:16,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 229 [2023-08-03 22:00:16,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 22:00:16,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:16,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 229 [2023-08-03 22:00:16,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:16,219 INFO L124 PetriNetUnfolderBase]: 1153/1908 cut-off events. [2023-08-03 22:00:16,220 INFO L125 PetriNetUnfolderBase]: For 385/417 co-relation queries the response was YES. [2023-08-03 22:00:16,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4329 conditions, 1908 events. 1153/1908 cut-off events. For 385/417 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9712 event pairs, 601 based on Foata normal form. 84/1781 useless extension candidates. Maximal degree in co-relation 3259. Up to 1158 conditions per place. [2023-08-03 22:00:16,230 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 43 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-03 22:00:16,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 51 transitions, 241 flow [2023-08-03 22:00:16,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:00:16,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:00:16,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-03 22:00:16,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49199417758369723 [2023-08-03 22:00:16,232 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-03 22:00:16,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-03 22:00:16,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:16,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-03 22:00:16,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 22:00:16,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 22:00:16,235 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 22:00:16,235 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 104 flow. Second operand 3 states and 338 transitions. [2023-08-03 22:00:16,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 51 transitions, 241 flow [2023-08-03 22:00:16,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:00:16,239 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 110 flow [2023-08-03 22:00:16,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-08-03 22:00:16,242 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 6 predicate places. [2023-08-03 22:00:16,242 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 110 flow [2023-08-03 22:00:16,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 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 22:00:16,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:16,242 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:00:16,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:00:16,243 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:16,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:16,243 INFO L85 PathProgramCache]: Analyzing trace with hash -900765365, now seen corresponding path program 1 times [2023-08-03 22:00:16,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:16,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431731373] [2023-08-03 22:00:16,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:16,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:00:16,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:16,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431731373] [2023-08-03 22:00:16,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431731373] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:16,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:16,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:00:16,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649897087] [2023-08-03 22:00:16,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:16,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:00:16,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:16,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:00:16,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:00:16,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 229 [2023-08-03 22:00:16,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 110 flow. Second operand has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 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 22:00:16,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:16,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 229 [2023-08-03 22:00:16,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:16,669 INFO L124 PetriNetUnfolderBase]: 1095/1877 cut-off events. [2023-08-03 22:00:16,669 INFO L125 PetriNetUnfolderBase]: For 543/543 co-relation queries the response was YES. [2023-08-03 22:00:16,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4351 conditions, 1877 events. 1095/1877 cut-off events. For 543/543 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10169 event pairs, 603 based on Foata normal form. 0/1699 useless extension candidates. Maximal degree in co-relation 1717. Up to 1137 conditions per place. [2023-08-03 22:00:16,679 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 56 selfloop transitions, 13 changer transitions 6/81 dead transitions. [2023-08-03 22:00:16,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 81 transitions, 400 flow [2023-08-03 22:00:16,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:00:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:00:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 532 transitions. [2023-08-03 22:00:16,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646288209606987 [2023-08-03 22:00:16,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 532 transitions. [2023-08-03 22:00:16,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 532 transitions. [2023-08-03 22:00:16,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:16,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 532 transitions. [2023-08-03 22:00:16,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 106.4) internal successors, (532), 5 states have internal predecessors, (532), 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 22:00:16,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 22:00:16,687 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 22:00:16,687 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 110 flow. Second operand 5 states and 532 transitions. [2023-08-03 22:00:16,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 81 transitions, 400 flow [2023-08-03 22:00:16,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 81 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:00:16,694 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 190 flow [2023-08-03 22:00:16,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=190, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2023-08-03 22:00:16,695 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-08-03 22:00:16,695 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 190 flow [2023-08-03 22:00:16,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 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 22:00:16,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:16,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:00:16,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:00:16,696 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:16,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:16,696 INFO L85 PathProgramCache]: Analyzing trace with hash 163013715, now seen corresponding path program 1 times [2023-08-03 22:00:16,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:16,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873149318] [2023-08-03 22:00:16,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:16,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:16,777 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 22:00:16,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:16,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873149318] [2023-08-03 22:00:16,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873149318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:16,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:16,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:00:16,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549691209] [2023-08-03 22:00:16,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:16,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:00:16,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:16,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:00:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:00:16,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 229 [2023-08-03 22:00:16,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 22:00:16,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:16,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 229 [2023-08-03 22:00:16,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:16,998 INFO L124 PetriNetUnfolderBase]: 872/1497 cut-off events. [2023-08-03 22:00:16,998 INFO L125 PetriNetUnfolderBase]: For 1052/1086 co-relation queries the response was YES. [2023-08-03 22:00:17,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3991 conditions, 1497 events. 872/1497 cut-off events. For 1052/1086 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7219 event pairs, 612 based on Foata normal form. 33/1442 useless extension candidates. Maximal degree in co-relation 2399. Up to 1267 conditions per place. [2023-08-03 22:00:17,004 INFO L140 encePairwiseOnDemand]: 224/229 looper letters, 48 selfloop transitions, 5 changer transitions 0/60 dead transitions. [2023-08-03 22:00:17,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 372 flow [2023-08-03 22:00:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:00:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:00:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-03 22:00:17,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47161572052401746 [2023-08-03 22:00:17,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-03 22:00:17,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-03 22:00:17,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:17,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-03 22:00:17,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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 22:00:17,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 22:00:17,009 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 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 22:00:17,009 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 190 flow. Second operand 3 states and 324 transitions. [2023-08-03 22:00:17,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 372 flow [2023-08-03 22:00:17,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 360 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-03 22:00:17,014 INFO L231 Difference]: Finished difference. Result has 45 places, 46 transitions, 217 flow [2023-08-03 22:00:17,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=217, PETRI_PLACES=45, PETRI_TRANSITIONS=46} [2023-08-03 22:00:17,015 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-08-03 22:00:17,018 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 46 transitions, 217 flow [2023-08-03 22:00:17,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 22:00:17,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:17,019 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:00:17,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 22:00:17,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:17,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:17,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1888832889, now seen corresponding path program 2 times [2023-08-03 22:00:17,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:17,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979813367] [2023-08-03 22:00:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:17,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:17,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:00:17,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979813367] [2023-08-03 22:00:17,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979813367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:00:17,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339477604] [2023-08-03 22:00:17,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 22:00:17,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:00:17,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:00:17,101 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 22:00:17,105 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 22:00:17,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 22:00:17,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 22:00:17,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 22:00:17,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:00:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:00:17,210 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:00:17,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339477604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:17,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:00:17,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 22:00:17,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806648094] [2023-08-03 22:00:17,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:17,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:00:17,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:17,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:00:17,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:00:17,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 229 [2023-08-03 22:00:17,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 46 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 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 22:00:17,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:17,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 229 [2023-08-03 22:00:17,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:17,341 INFO L124 PetriNetUnfolderBase]: 499/868 cut-off events. [2023-08-03 22:00:17,341 INFO L125 PetriNetUnfolderBase]: For 729/788 co-relation queries the response was YES. [2023-08-03 22:00:17,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 868 events. 499/868 cut-off events. For 729/788 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3772 event pairs, 12 based on Foata normal form. 169/993 useless extension candidates. Maximal degree in co-relation 1921. Up to 563 conditions per place. [2023-08-03 22:00:17,346 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 61 selfloop transitions, 3 changer transitions 7/79 dead transitions. [2023-08-03 22:00:17,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 79 transitions, 490 flow [2023-08-03 22:00:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:00:17,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:00:17,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 553 transitions. [2023-08-03 22:00:17,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4829694323144105 [2023-08-03 22:00:17,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 553 transitions. [2023-08-03 22:00:17,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 553 transitions. [2023-08-03 22:00:17,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:17,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 553 transitions. [2023-08-03 22:00:17,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 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 22:00:17,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 22:00:17,352 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 229.0) internal successors, (1374), 6 states have internal predecessors, (1374), 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 22:00:17,352 INFO L175 Difference]: Start difference. First operand has 45 places, 46 transitions, 217 flow. Second operand 5 states and 553 transitions. [2023-08-03 22:00:17,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 79 transitions, 490 flow [2023-08-03 22:00:17,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 79 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:00:17,358 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 216 flow [2023-08-03 22:00:17,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-03 22:00:17,359 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2023-08-03 22:00:17,359 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 216 flow [2023-08-03 22:00:17,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.8) internal successors, (514), 5 states have internal predecessors, (514), 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 22:00:17,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:17,360 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] [2023-08-03 22:00:17,368 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 22:00:17,566 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,SelfDestructingSolverStorable7 [2023-08-03 22:00:17,566 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:17,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:17,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1359505989, now seen corresponding path program 1 times [2023-08-03 22:00:17,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:17,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898023456] [2023-08-03 22:00:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:17,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:17,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:00:17,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:17,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898023456] [2023-08-03 22:00:17,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898023456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:17,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:17,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 22:00:17,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126646341] [2023-08-03 22:00:17,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:17,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:00:17,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:17,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:00:17,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:00:17,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 229 [2023-08-03 22:00:17,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 216 flow. Second operand has 8 states, 8 states have (on average 85.625) internal successors, (685), 8 states have internal predecessors, (685), 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 22:00:17,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:17,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 229 [2023-08-03 22:00:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:18,406 INFO L124 PetriNetUnfolderBase]: 1391/2342 cut-off events. [2023-08-03 22:00:18,406 INFO L125 PetriNetUnfolderBase]: For 3979/4032 co-relation queries the response was YES. [2023-08-03 22:00:18,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8151 conditions, 2342 events. 1391/2342 cut-off events. For 3979/4032 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12680 event pairs, 308 based on Foata normal form. 107/2367 useless extension candidates. Maximal degree in co-relation 6244. Up to 796 conditions per place. [2023-08-03 22:00:18,423 INFO L140 encePairwiseOnDemand]: 216/229 looper letters, 158 selfloop transitions, 75 changer transitions 7/243 dead transitions. [2023-08-03 22:00:18,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 243 transitions, 1748 flow [2023-08-03 22:00:18,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-03 22:00:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-03 22:00:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1510 transitions. [2023-08-03 22:00:18,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.412117903930131 [2023-08-03 22:00:18,428 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1510 transitions. [2023-08-03 22:00:18,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1510 transitions. [2023-08-03 22:00:18,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:18,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1510 transitions. [2023-08-03 22:00:18,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 94.375) internal successors, (1510), 16 states have internal predecessors, (1510), 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 22:00:18,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 229.0) internal successors, (3893), 17 states have internal predecessors, (3893), 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 22:00:18,439 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 229.0) internal successors, (3893), 17 states have internal predecessors, (3893), 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 22:00:18,439 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 216 flow. Second operand 16 states and 1510 transitions. [2023-08-03 22:00:18,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 243 transitions, 1748 flow [2023-08-03 22:00:18,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 243 transitions, 1723 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-03 22:00:18,456 INFO L231 Difference]: Finished difference. Result has 72 places, 113 transitions, 927 flow [2023-08-03 22:00:18,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=927, PETRI_PLACES=72, PETRI_TRANSITIONS=113} [2023-08-03 22:00:18,457 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2023-08-03 22:00:18,457 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 113 transitions, 927 flow [2023-08-03 22:00:18,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 85.625) internal successors, (685), 8 states have internal predecessors, (685), 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 22:00:18,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:18,458 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] [2023-08-03 22:00:18,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 22:00:18,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:18,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:18,458 INFO L85 PathProgramCache]: Analyzing trace with hash -754435315, now seen corresponding path program 2 times [2023-08-03 22:00:18,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:18,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276018410] [2023-08-03 22:00:18,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:18,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:18,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:18,669 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 22:00:18,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:18,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276018410] [2023-08-03 22:00:18,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276018410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:18,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:18,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 22:00:18,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428522726] [2023-08-03 22:00:18,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:18,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:00:18,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:00:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:00:18,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 229 [2023-08-03 22:00:18,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 113 transitions, 927 flow. Second operand has 8 states, 8 states have (on average 85.5) internal successors, (684), 8 states have internal predecessors, (684), 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 22:00:18,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:18,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 229 [2023-08-03 22:00:18,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:19,656 INFO L124 PetriNetUnfolderBase]: 2561/4313 cut-off events. [2023-08-03 22:00:19,656 INFO L125 PetriNetUnfolderBase]: For 16055/16281 co-relation queries the response was YES. [2023-08-03 22:00:19,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19127 conditions, 4313 events. 2561/4313 cut-off events. For 16055/16281 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26520 event pairs, 580 based on Foata normal form. 346/4649 useless extension candidates. Maximal degree in co-relation 14931. Up to 1611 conditions per place. [2023-08-03 22:00:19,698 INFO L140 encePairwiseOnDemand]: 216/229 looper letters, 164 selfloop transitions, 185 changer transitions 3/356 dead transitions. [2023-08-03 22:00:19,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 356 transitions, 3558 flow [2023-08-03 22:00:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-03 22:00:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-03 22:00:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1577 transitions. [2023-08-03 22:00:19,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050860518880041 [2023-08-03 22:00:19,703 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1577 transitions. [2023-08-03 22:00:19,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1577 transitions. [2023-08-03 22:00:19,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:19,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1577 transitions. [2023-08-03 22:00:19,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.76470588235294) internal successors, (1577), 17 states have internal predecessors, (1577), 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 22:00:19,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 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 22:00:19,713 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 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 22:00:19,714 INFO L175 Difference]: Start difference. First operand has 72 places, 113 transitions, 927 flow. Second operand 17 states and 1577 transitions. [2023-08-03 22:00:19,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 356 transitions, 3558 flow [2023-08-03 22:00:19,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 356 transitions, 3550 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-03 22:00:19,776 INFO L231 Difference]: Finished difference. Result has 98 places, 248 transitions, 2824 flow [2023-08-03 22:00:19,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2824, PETRI_PLACES=98, PETRI_TRANSITIONS=248} [2023-08-03 22:00:19,777 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 65 predicate places. [2023-08-03 22:00:19,777 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 248 transitions, 2824 flow [2023-08-03 22:00:19,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 85.5) internal successors, (684), 8 states have internal predecessors, (684), 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 22:00:19,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:19,777 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] [2023-08-03 22:00:19,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 22:00:19,778 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:19,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash 946409114, now seen corresponding path program 1 times [2023-08-03 22:00:19,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:19,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873537979] [2023-08-03 22:00:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:19,930 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 22:00:19,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:19,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873537979] [2023-08-03 22:00:19,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873537979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:19,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:19,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 22:00:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803017232] [2023-08-03 22:00:19,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:19,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:00:19,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:19,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:00:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:00:20,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 229 [2023-08-03 22:00:20,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 248 transitions, 2824 flow. Second operand has 8 states, 8 states have (on average 85.5) internal successors, (684), 8 states have internal predecessors, (684), 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 22:00:20,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:20,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 229 [2023-08-03 22:00:20,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:21,085 INFO L124 PetriNetUnfolderBase]: 2868/4757 cut-off events. [2023-08-03 22:00:21,086 INFO L125 PetriNetUnfolderBase]: For 28624/28851 co-relation queries the response was YES. [2023-08-03 22:00:21,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25566 conditions, 4757 events. 2868/4757 cut-off events. For 28624/28851 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29193 event pairs, 551 based on Foata normal form. 212/4942 useless extension candidates. Maximal degree in co-relation 22557. Up to 1729 conditions per place. [2023-08-03 22:00:21,133 INFO L140 encePairwiseOnDemand]: 218/229 looper letters, 234 selfloop transitions, 175 changer transitions 2/451 dead transitions. [2023-08-03 22:00:21,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 451 transitions, 5491 flow [2023-08-03 22:00:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-03 22:00:21,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-03 22:00:21,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1573 transitions. [2023-08-03 22:00:21,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4040585666581043 [2023-08-03 22:00:21,138 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1573 transitions. [2023-08-03 22:00:21,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1573 transitions. [2023-08-03 22:00:21,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:21,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1573 transitions. [2023-08-03 22:00:21,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.52941176470588) internal successors, (1573), 17 states have internal predecessors, (1573), 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 22:00:21,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 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 22:00:21,149 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 229.0) internal successors, (4122), 18 states have internal predecessors, (4122), 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 22:00:21,149 INFO L175 Difference]: Start difference. First operand has 98 places, 248 transitions, 2824 flow. Second operand 17 states and 1573 transitions. [2023-08-03 22:00:21,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 451 transitions, 5491 flow [2023-08-03 22:00:21,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 451 transitions, 5387 flow, removed 52 selfloop flow, removed 0 redundant places. [2023-08-03 22:00:21,294 INFO L231 Difference]: Finished difference. Result has 119 places, 324 transitions, 4043 flow [2023-08-03 22:00:21,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4043, PETRI_PLACES=119, PETRI_TRANSITIONS=324} [2023-08-03 22:00:21,295 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 86 predicate places. [2023-08-03 22:00:21,295 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 324 transitions, 4043 flow [2023-08-03 22:00:21,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 85.5) internal successors, (684), 8 states have internal predecessors, (684), 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 22:00:21,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:21,296 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] [2023-08-03 22:00:21,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 22:00:21,296 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:21,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:21,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1560749641, now seen corresponding path program 3 times [2023-08-03 22:00:21,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:21,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038498213] [2023-08-03 22:00:21,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:21,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:21,475 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 22:00:21,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:21,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038498213] [2023-08-03 22:00:21,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038498213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:21,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:21,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 22:00:21,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489133514] [2023-08-03 22:00:21,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:21,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:00:21,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:21,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:00:21,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:00:21,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 229 [2023-08-03 22:00:21,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 324 transitions, 4043 flow. Second operand has 6 states, 6 states have (on average 92.16666666666667) internal successors, (553), 6 states have internal predecessors, (553), 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 22:00:21,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:21,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 229 [2023-08-03 22:00:21,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:22,143 INFO L124 PetriNetUnfolderBase]: 1894/3241 cut-off events. [2023-08-03 22:00:22,144 INFO L125 PetriNetUnfolderBase]: For 27114/27277 co-relation queries the response was YES. [2023-08-03 22:00:22,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19943 conditions, 3241 events. 1894/3241 cut-off events. For 27114/27277 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19044 event pairs, 588 based on Foata normal form. 173/3382 useless extension candidates. Maximal degree in co-relation 17616. Up to 1792 conditions per place. [2023-08-03 22:00:22,176 INFO L140 encePairwiseOnDemand]: 220/229 looper letters, 157 selfloop transitions, 163 changer transitions 3/334 dead transitions. [2023-08-03 22:00:22,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 334 transitions, 4746 flow [2023-08-03 22:00:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 22:00:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 22:00:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 592 transitions. [2023-08-03 22:00:22,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43085880640465796 [2023-08-03 22:00:22,179 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 592 transitions. [2023-08-03 22:00:22,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 592 transitions. [2023-08-03 22:00:22,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:22,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 592 transitions. [2023-08-03 22:00:22,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 98.66666666666667) internal successors, (592), 6 states have internal predecessors, (592), 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 22:00:22,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 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 22:00:22,183 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 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 22:00:22,183 INFO L175 Difference]: Start difference. First operand has 119 places, 324 transitions, 4043 flow. Second operand 6 states and 592 transitions. [2023-08-03 22:00:22,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 334 transitions, 4746 flow [2023-08-03 22:00:22,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 334 transitions, 4474 flow, removed 50 selfloop flow, removed 6 redundant places. [2023-08-03 22:00:22,281 INFO L231 Difference]: Finished difference. Result has 118 places, 299 transitions, 3833 flow [2023-08-03 22:00:22,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=3171, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3833, PETRI_PLACES=118, PETRI_TRANSITIONS=299} [2023-08-03 22:00:22,281 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 85 predicate places. [2023-08-03 22:00:22,282 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 299 transitions, 3833 flow [2023-08-03 22:00:22,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 92.16666666666667) internal successors, (553), 6 states have internal predecessors, (553), 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 22:00:22,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:22,282 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] [2023-08-03 22:00:22,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 22:00:22,282 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:22,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:22,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1097180238, now seen corresponding path program 2 times [2023-08-03 22:00:22,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:22,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664296857] [2023-08-03 22:00:22,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:22,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:22,428 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 22:00:22,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:22,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664296857] [2023-08-03 22:00:22,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664296857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:00:22,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:00:22,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 22:00:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766448765] [2023-08-03 22:00:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:00:22,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:00:22,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:22,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:00:22,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:00:22,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 229 [2023-08-03 22:00:22,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 299 transitions, 3833 flow. Second operand has 8 states, 8 states have (on average 85.5) internal successors, (684), 8 states have internal predecessors, (684), 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 22:00:22,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:22,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 229 [2023-08-03 22:00:22,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:23,312 INFO L124 PetriNetUnfolderBase]: 2040/3411 cut-off events. [2023-08-03 22:00:23,313 INFO L125 PetriNetUnfolderBase]: For 26239/26396 co-relation queries the response was YES. [2023-08-03 22:00:23,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20648 conditions, 3411 events. 2040/3411 cut-off events. For 26239/26396 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19066 event pairs, 404 based on Foata normal form. 163/3566 useless extension candidates. Maximal degree in co-relation 17107. Up to 1369 conditions per place. [2023-08-03 22:00:23,349 INFO L140 encePairwiseOnDemand]: 218/229 looper letters, 269 selfloop transitions, 113 changer transitions 5/434 dead transitions. [2023-08-03 22:00:23,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 434 transitions, 5883 flow [2023-08-03 22:00:23,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-03 22:00:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-03 22:00:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1467 transitions. [2023-08-03 22:00:23,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400382096069869 [2023-08-03 22:00:23,354 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1467 transitions. [2023-08-03 22:00:23,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1467 transitions. [2023-08-03 22:00:23,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:23,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1467 transitions. [2023-08-03 22:00:23,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 91.6875) internal successors, (1467), 16 states have internal predecessors, (1467), 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 22:00:23,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 229.0) internal successors, (3893), 17 states have internal predecessors, (3893), 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 22:00:23,364 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 229.0) internal successors, (3893), 17 states have internal predecessors, (3893), 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 22:00:23,364 INFO L175 Difference]: Start difference. First operand has 118 places, 299 transitions, 3833 flow. Second operand 16 states and 1467 transitions. [2023-08-03 22:00:23,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 434 transitions, 5883 flow [2023-08-03 22:00:23,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 434 transitions, 5699 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 22:00:23,451 INFO L231 Difference]: Finished difference. Result has 135 places, 323 transitions, 4186 flow [2023-08-03 22:00:23,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=3616, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4186, PETRI_PLACES=135, PETRI_TRANSITIONS=323} [2023-08-03 22:00:23,452 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 102 predicate places. [2023-08-03 22:00:23,453 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 323 transitions, 4186 flow [2023-08-03 22:00:23,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 85.5) internal successors, (684), 8 states have internal predecessors, (684), 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 22:00:23,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:23,453 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] [2023-08-03 22:00:23,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 22:00:23,453 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:23,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:23,454 INFO L85 PathProgramCache]: Analyzing trace with hash 381113835, now seen corresponding path program 4 times [2023-08-03 22:00:23,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:23,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57432660] [2023-08-03 22:00:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:23,698 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 22:00:23,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57432660] [2023-08-03 22:00:23,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57432660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:00:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258876401] [2023-08-03 22:00:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-03 22:00:23,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:00:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:00:23,701 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 22:00:23,726 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 22:00:23,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-03 22:00:23,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 22:00:23,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-03 22:00:23,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:00:23,825 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 10 treesize of output 8 [2023-08-03 22:00:23,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-03 22:00:23,967 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 18 treesize of output 20 [2023-08-03 22:00:24,029 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:00:24,030 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:00:24,035 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 22:00:24,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:00:24,128 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_232 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_232) c_~data~0.base) (+ (* |c_thrThread1of2ForFork0_~c~0#1| 4) c_~data~0.offset)) 1)) (< |c_thrThread1of2ForFork0_~c~0#1| c_~next~0)) is different from false [2023-08-03 22:00:24,141 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 22:00:24,141 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 26 treesize of output 27 [2023-08-03 22:00:24,145 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 42 treesize of output 26 [2023-08-03 22:00:24,158 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 9 treesize of output 3 [2023-08-03 22:00:24,292 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 22:00:24,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258876401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:00:24,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:00:24,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 20 [2023-08-03 22:00:24,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036878044] [2023-08-03 22:00:24,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:00:24,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-03 22:00:24,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:24,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-03 22:00:24,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=323, Unknown=1, NotChecked=38, Total=462 [2023-08-03 22:00:24,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 229 [2023-08-03 22:00:24,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 323 transitions, 4186 flow. Second operand has 22 states, 22 states have (on average 66.0909090909091) internal successors, (1454), 22 states have internal predecessors, (1454), 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 22:00:24,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:24,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 229 [2023-08-03 22:00:24,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:27,763 INFO L124 PetriNetUnfolderBase]: 4409/7237 cut-off events. [2023-08-03 22:00:27,763 INFO L125 PetriNetUnfolderBase]: For 68965/68965 co-relation queries the response was YES. [2023-08-03 22:00:27,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47163 conditions, 7237 events. 4409/7237 cut-off events. For 68965/68965 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 45947 event pairs, 159 based on Foata normal form. 66/7303 useless extension candidates. Maximal degree in co-relation 44577. Up to 1726 conditions per place. [2023-08-03 22:00:27,842 INFO L140 encePairwiseOnDemand]: 204/229 looper letters, 861 selfloop transitions, 696 changer transitions 35/1593 dead transitions. [2023-08-03 22:00:27,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 1593 transitions, 21496 flow [2023-08-03 22:00:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-03 22:00:27,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-03 22:00:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 5497 transitions. [2023-08-03 22:00:27,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3158469317398299 [2023-08-03 22:00:27,852 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 5497 transitions. [2023-08-03 22:00:27,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 5497 transitions. [2023-08-03 22:00:27,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:27,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 5497 transitions. [2023-08-03 22:00:27,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 72.32894736842105) internal successors, (5497), 76 states have internal predecessors, (5497), 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 22:00:27,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 229.0) internal successors, (17633), 77 states have internal predecessors, (17633), 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 22:00:27,891 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 229.0) internal successors, (17633), 77 states have internal predecessors, (17633), 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 22:00:27,892 INFO L175 Difference]: Start difference. First operand has 135 places, 323 transitions, 4186 flow. Second operand 76 states and 5497 transitions. [2023-08-03 22:00:27,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 1593 transitions, 21496 flow [2023-08-03 22:00:28,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 1593 transitions, 21316 flow, removed 55 selfloop flow, removed 1 redundant places. [2023-08-03 22:00:28,188 INFO L231 Difference]: Finished difference. Result has 245 places, 858 transitions, 12643 flow [2023-08-03 22:00:28,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=12643, PETRI_PLACES=245, PETRI_TRANSITIONS=858} [2023-08-03 22:00:28,189 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 212 predicate places. [2023-08-03 22:00:28,190 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 858 transitions, 12643 flow [2023-08-03 22:00:28,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 66.0909090909091) internal successors, (1454), 22 states have internal predecessors, (1454), 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 22:00:28,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:28,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:00:28,213 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 22:00:28,408 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 22:00:28,408 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:28,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:28,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1963750186, now seen corresponding path program 1 times [2023-08-03 22:00:28,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:28,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82717782] [2023-08-03 22:00:28,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:28,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:28,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82717782] [2023-08-03 22:00:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82717782] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:00:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075921301] [2023-08-03 22:00:28,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:28,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:00:28,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:00:28,577 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:00:28,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 22:00:28,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:28,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-03 22:00:28,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:00:28,708 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 15 treesize of output 11 [2023-08-03 22:00:28,730 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:00:28,731 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:00:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:28,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:00:28,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:28,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075921301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:00:28,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:00:28,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-03 22:00:28,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217346030] [2023-08-03 22:00:28,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:00:28,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 22:00:28,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 22:00:28,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-08-03 22:00:29,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-03 22:00:29,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 858 transitions, 12643 flow. Second operand has 16 states, 16 states have (on average 83.8125) internal successors, (1341), 16 states have internal predecessors, (1341), 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 22:00:29,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:29,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-03 22:00:29,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:33,269 INFO L124 PetriNetUnfolderBase]: 6786/11709 cut-off events. [2023-08-03 22:00:33,269 INFO L125 PetriNetUnfolderBase]: For 251985/252783 co-relation queries the response was YES. [2023-08-03 22:00:33,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99059 conditions, 11709 events. 6786/11709 cut-off events. For 251985/252783 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 83904 event pairs, 742 based on Foata normal form. 1109/12777 useless extension candidates. Maximal degree in co-relation 98430. Up to 2917 conditions per place. [2023-08-03 22:00:33,397 INFO L140 encePairwiseOnDemand]: 211/229 looper letters, 786 selfloop transitions, 1130 changer transitions 27/1966 dead transitions. [2023-08-03 22:00:33,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1966 transitions, 32270 flow [2023-08-03 22:00:33,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-03 22:00:33,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-03 22:00:33,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5688 transitions. [2023-08-03 22:00:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3881004366812227 [2023-08-03 22:00:33,405 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5688 transitions. [2023-08-03 22:00:33,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5688 transitions. [2023-08-03 22:00:33,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:33,408 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5688 transitions. [2023-08-03 22:00:33,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 88.875) internal successors, (5688), 64 states have internal predecessors, (5688), 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 22:00:33,431 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 229.0) internal successors, (14885), 65 states have internal predecessors, (14885), 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 22:00:33,434 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 229.0) internal successors, (14885), 65 states have internal predecessors, (14885), 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 22:00:33,435 INFO L175 Difference]: Start difference. First operand has 245 places, 858 transitions, 12643 flow. Second operand 64 states and 5688 transitions. [2023-08-03 22:00:33,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1966 transitions, 32270 flow [2023-08-03 22:00:34,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 1966 transitions, 31523 flow, removed 128 selfloop flow, removed 1 redundant places. [2023-08-03 22:00:34,626 INFO L231 Difference]: Finished difference. Result has 328 places, 1428 transitions, 23796 flow [2023-08-03 22:00:34,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=12227, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=586, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=23796, PETRI_PLACES=328, PETRI_TRANSITIONS=1428} [2023-08-03 22:00:34,628 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 295 predicate places. [2023-08-03 22:00:34,628 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 1428 transitions, 23796 flow [2023-08-03 22:00:34,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.8125) internal successors, (1341), 16 states have internal predecessors, (1341), 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 22:00:34,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:34,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 22:00:34,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 22:00:34,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 22:00:34,833 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:34,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:34,833 INFO L85 PathProgramCache]: Analyzing trace with hash -77152345, now seen corresponding path program 1 times [2023-08-03 22:00:34,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:34,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084161077] [2023-08-03 22:00:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:34,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:35,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:35,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084161077] [2023-08-03 22:00:35,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084161077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:00:35,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544628816] [2023-08-03 22:00:35,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:35,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:00:35,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:00:35,021 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:00:35,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 22:00:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:35,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-03 22:00:35,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:00:35,205 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 15 treesize of output 11 [2023-08-03 22:00:35,235 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:00:35,236 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:00:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:35,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:00:35,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:35,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544628816] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:00:35,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:00:35,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-03 22:00:35,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098379247] [2023-08-03 22:00:35,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:00:35,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 22:00:35,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:35,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 22:00:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-08-03 22:00:35,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-03 22:00:35,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 1428 transitions, 23796 flow. Second operand has 16 states, 16 states have (on average 83.6875) internal successors, (1339), 16 states have internal predecessors, (1339), 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 22:00:35,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:35,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-03 22:00:35,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:40,363 INFO L124 PetriNetUnfolderBase]: 7090/12073 cut-off events. [2023-08-03 22:00:40,363 INFO L125 PetriNetUnfolderBase]: For 346506/347176 co-relation queries the response was YES. [2023-08-03 22:00:40,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114048 conditions, 12073 events. 7090/12073 cut-off events. For 346506/347176 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 84998 event pairs, 596 based on Foata normal form. 806/12864 useless extension candidates. Maximal degree in co-relation 113356. Up to 3126 conditions per place. [2023-08-03 22:00:40,659 INFO L140 encePairwiseOnDemand]: 213/229 looper letters, 813 selfloop transitions, 1030 changer transitions 20/2064 dead transitions. [2023-08-03 22:00:40,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 2064 transitions, 37339 flow [2023-08-03 22:00:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-03 22:00:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-03 22:00:40,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4597 transitions. [2023-08-03 22:00:40,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38604299630500505 [2023-08-03 22:00:40,677 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4597 transitions. [2023-08-03 22:00:40,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4597 transitions. [2023-08-03 22:00:40,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:40,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4597 transitions. [2023-08-03 22:00:40,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 88.40384615384616) internal successors, (4597), 52 states have internal predecessors, (4597), 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 22:00:40,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 229.0) internal successors, (12137), 53 states have internal predecessors, (12137), 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 22:00:40,707 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 229.0) internal successors, (12137), 53 states have internal predecessors, (12137), 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 22:00:40,707 INFO L175 Difference]: Start difference. First operand has 328 places, 1428 transitions, 23796 flow. Second operand 52 states and 4597 transitions. [2023-08-03 22:00:40,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 2064 transitions, 37339 flow [2023-08-03 22:00:42,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 2064 transitions, 35676 flow, removed 171 selfloop flow, removed 11 redundant places. [2023-08-03 22:00:42,262 INFO L231 Difference]: Finished difference. Result has 373 places, 1643 transitions, 27982 flow [2023-08-03 22:00:42,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=21499, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=27982, PETRI_PLACES=373, PETRI_TRANSITIONS=1643} [2023-08-03 22:00:42,264 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 340 predicate places. [2023-08-03 22:00:42,264 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 1643 transitions, 27982 flow [2023-08-03 22:00:42,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.6875) internal successors, (1339), 16 states have internal predecessors, (1339), 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 22:00:42,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:00:42,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 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 22:00:42,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 22:00:42,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 22:00:42,465 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:00:42,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:00:42,465 INFO L85 PathProgramCache]: Analyzing trace with hash 718396843, now seen corresponding path program 1 times [2023-08-03 22:00:42,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:00:42,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702229513] [2023-08-03 22:00:42,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:42,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:00:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:42,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:00:42,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702229513] [2023-08-03 22:00:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702229513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:00:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520351013] [2023-08-03 22:00:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:00:42,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:00:42,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:00:42,642 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:00:42,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 22:00:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:00:42,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-03 22:00:42,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:00:42,787 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 15 treesize of output 11 [2023-08-03 22:00:42,812 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:00:42,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:00:42,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:42,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:00:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:00:42,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520351013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:00:42,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:00:42,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-03 22:00:42,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324727305] [2023-08-03 22:00:42,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:00:42,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 22:00:42,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:00:42,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 22:00:42,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-08-03 22:00:43,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-03 22:00:43,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 1643 transitions, 27982 flow. Second operand has 16 states, 16 states have (on average 83.6875) internal successors, (1339), 16 states have internal predecessors, (1339), 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 22:00:43,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:00:43,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-03 22:00:43,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:00:53,720 INFO L124 PetriNetUnfolderBase]: 15206/26088 cut-off events. [2023-08-03 22:00:53,720 INFO L125 PetriNetUnfolderBase]: For 917919/919128 co-relation queries the response was YES. [2023-08-03 22:00:53,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 263883 conditions, 26088 events. 15206/26088 cut-off events. For 917919/919128 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 205129 event pairs, 927 based on Foata normal form. 1897/27934 useless extension candidates. Maximal degree in co-relation 263348. Up to 7004 conditions per place. [2023-08-03 22:00:54,094 INFO L140 encePairwiseOnDemand]: 211/229 looper letters, 1793 selfloop transitions, 2374 changer transitions 14/4231 dead transitions. [2023-08-03 22:00:54,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 4231 transitions, 80094 flow [2023-08-03 22:00:54,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-03 22:00:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-03 22:00:54,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4602 transitions. [2023-08-03 22:00:54,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3864628820960699 [2023-08-03 22:00:54,099 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4602 transitions. [2023-08-03 22:00:54,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4602 transitions. [2023-08-03 22:00:54,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:00:54,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4602 transitions. [2023-08-03 22:00:54,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 88.5) internal successors, (4602), 52 states have internal predecessors, (4602), 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 22:00:54,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 229.0) internal successors, (12137), 53 states have internal predecessors, (12137), 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 22:00:54,117 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 229.0) internal successors, (12137), 53 states have internal predecessors, (12137), 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 22:00:54,117 INFO L175 Difference]: Start difference. First operand has 373 places, 1643 transitions, 27982 flow. Second operand 52 states and 4602 transitions. [2023-08-03 22:00:54,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 4231 transitions, 80094 flow [2023-08-03 22:01:00,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 4231 transitions, 77397 flow, removed 562 selfloop flow, removed 22 redundant places. [2023-08-03 22:01:00,277 INFO L231 Difference]: Finished difference. Result has 420 places, 3034 transitions, 57744 flow [2023-08-03 22:01:00,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=26560, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=57744, PETRI_PLACES=420, PETRI_TRANSITIONS=3034} [2023-08-03 22:01:00,279 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 387 predicate places. [2023-08-03 22:01:00,279 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 3034 transitions, 57744 flow [2023-08-03 22:01:00,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.6875) internal successors, (1339), 16 states have internal predecessors, (1339), 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 22:01:00,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:01:00,280 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:01:00,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 22:01:00,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 22:01:00,485 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:01:00,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:01:00,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1204824442, now seen corresponding path program 1 times [2023-08-03 22:01:00,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:01:00,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663472591] [2023-08-03 22:01:00,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:01:00,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:01:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:01:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:01:00,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:01:00,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663472591] [2023-08-03 22:01:00,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663472591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:01:00,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517662947] [2023-08-03 22:01:00,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:01:00,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:01:00,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:01:00,652 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:01:00,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 22:01:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:01:00,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-03 22:01:00,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:01:00,842 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 15 treesize of output 11 [2023-08-03 22:01:00,868 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:01:00,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:01:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:01:00,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:01:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:01:00,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517662947] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:01:00,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:01:00,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-08-03 22:01:00,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389963058] [2023-08-03 22:01:00,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:01:00,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-03 22:01:00,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:01:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-03 22:01:00,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-08-03 22:01:01,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-03 22:01:01,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 3034 transitions, 57744 flow. Second operand has 16 states, 16 states have (on average 83.8125) internal successors, (1341), 16 states have internal predecessors, (1341), 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 22:01:01,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:01:01,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-03 22:01:01,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:01:20,689 INFO L124 PetriNetUnfolderBase]: 19398/32676 cut-off events. [2023-08-03 22:01:20,689 INFO L125 PetriNetUnfolderBase]: For 1529044/1531607 co-relation queries the response was YES. [2023-08-03 22:01:21,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362439 conditions, 32676 events. 19398/32676 cut-off events. For 1529044/1531607 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 259056 event pairs, 2088 based on Foata normal form. 3088/35602 useless extension candidates. Maximal degree in co-relation 361882. Up to 9043 conditions per place. [2023-08-03 22:01:21,577 INFO L140 encePairwiseOnDemand]: 213/229 looper letters, 3340 selfloop transitions, 1448 changer transitions 26/5194 dead transitions. [2023-08-03 22:01:21,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 5194 transitions, 104382 flow [2023-08-03 22:01:21,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-03 22:01:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-03 22:01:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5617 transitions. [2023-08-03 22:01:21,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38325600436681223 [2023-08-03 22:01:21,589 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5617 transitions. [2023-08-03 22:01:21,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5617 transitions. [2023-08-03 22:01:21,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:01:21,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5617 transitions. [2023-08-03 22:01:21,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 87.765625) internal successors, (5617), 64 states have internal predecessors, (5617), 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 22:01:21,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 229.0) internal successors, (14885), 65 states have internal predecessors, (14885), 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 22:01:21,619 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 229.0) internal successors, (14885), 65 states have internal predecessors, (14885), 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 22:01:21,619 INFO L175 Difference]: Start difference. First operand has 420 places, 3034 transitions, 57744 flow. Second operand 64 states and 5617 transitions. [2023-08-03 22:01:21,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 5194 transitions, 104382 flow [2023-08-03 22:01:34,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 5194 transitions, 102977 flow, removed 335 selfloop flow, removed 7 redundant places. [2023-08-03 22:01:34,188 INFO L231 Difference]: Finished difference. Result has 489 places, 3479 transitions, 69139 flow [2023-08-03 22:01:34,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=53956, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=896, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=69139, PETRI_PLACES=489, PETRI_TRANSITIONS=3479} [2023-08-03 22:01:34,191 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 456 predicate places. [2023-08-03 22:01:34,191 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 3479 transitions, 69139 flow [2023-08-03 22:01:34,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 83.8125) internal successors, (1341), 16 states have internal predecessors, (1341), 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 22:01:34,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:01:34,191 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:01:34,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 22:01:34,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:01:34,398 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:01:34,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:01:34,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1469419528, now seen corresponding path program 2 times [2023-08-03 22:01:34,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:01:34,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568844828] [2023-08-03 22:01:34,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:01:34,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:01:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:01:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:01:34,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:01:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568844828] [2023-08-03 22:01:34,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568844828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:01:34,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964611748] [2023-08-03 22:01:34,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 22:01:34,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:01:34,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:01:34,559 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:01:34,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 22:01:34,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 22:01:34,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 22:01:34,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-03 22:01:34,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:01:34,721 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 15 treesize of output 11 [2023-08-03 22:01:34,756 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:01:34,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:01:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:01:34,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:01:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:01:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964611748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:01:34,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:01:34,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 18 [2023-08-03 22:01:34,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374339845] [2023-08-03 22:01:34,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:01:34,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-03 22:01:34,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:01:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-03 22:01:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-03 22:01:35,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 229 [2023-08-03 22:01:35,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 3479 transitions, 69139 flow. Second operand has 19 states, 19 states have (on average 83.42105263157895) internal successors, (1585), 19 states have internal predecessors, (1585), 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 22:01:35,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:01:35,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 229 [2023-08-03 22:01:35,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:02:13,495 INFO L124 PetriNetUnfolderBase]: 30217/50829 cut-off events. [2023-08-03 22:02:13,496 INFO L125 PetriNetUnfolderBase]: For 2750022/2753752 co-relation queries the response was YES. [2023-08-03 22:02:14,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594669 conditions, 50829 events. 30217/50829 cut-off events. For 2750022/2753752 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 428325 event pairs, 2801 based on Foata normal form. 4580/55241 useless extension candidates. Maximal degree in co-relation 592803. Up to 13645 conditions per place. [2023-08-03 22:02:14,986 INFO L140 encePairwiseOnDemand]: 215/229 looper letters, 2131 selfloop transitions, 2826 changer transitions 22/5357 dead transitions. [2023-08-03 22:02:14,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 5357 transitions, 115339 flow [2023-08-03 22:02:14,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-03 22:02:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-03 22:02:14,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4449 transitions. [2023-08-03 22:02:14,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3885589519650655 [2023-08-03 22:02:14,992 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4449 transitions. [2023-08-03 22:02:14,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4449 transitions. [2023-08-03 22:02:14,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:02:14,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4449 transitions. [2023-08-03 22:02:14,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 88.98) internal successors, (4449), 50 states have internal predecessors, (4449), 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 22:02:15,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 229.0) internal successors, (11679), 51 states have internal predecessors, (11679), 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 22:02:15,009 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 229.0) internal successors, (11679), 51 states have internal predecessors, (11679), 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 22:02:15,010 INFO L175 Difference]: Start difference. First operand has 489 places, 3479 transitions, 69139 flow. Second operand 50 states and 4449 transitions. [2023-08-03 22:02:15,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 5357 transitions, 115339 flow [2023-08-03 22:02:44,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 5357 transitions, 114235 flow, removed 204 selfloop flow, removed 15 redundant places. [2023-08-03 22:02:44,184 INFO L231 Difference]: Finished difference. Result has 534 places, 4398 transitions, 95473 flow [2023-08-03 22:02:44,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=67381, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1992, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=95473, PETRI_PLACES=534, PETRI_TRANSITIONS=4398} [2023-08-03 22:02:44,188 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 501 predicate places. [2023-08-03 22:02:44,188 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 4398 transitions, 95473 flow [2023-08-03 22:02:44,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 83.42105263157895) internal successors, (1585), 19 states have internal predecessors, (1585), 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 22:02:44,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:02:44,188 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:02:44,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 22:02:44,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:02:44,397 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:02:44,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:02:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash 825141788, now seen corresponding path program 1 times [2023-08-03 22:02:44,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:02:44,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855914917] [2023-08-03 22:02:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:02:44,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:02:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:02:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:02:44,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:02:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855914917] [2023-08-03 22:02:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855914917] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:02:44,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442678916] [2023-08-03 22:02:44,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:02:44,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:02:44,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:02:44,622 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:02:44,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 22:02:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:02:44,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-03 22:02:44,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:02:44,774 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 15 treesize of output 11 [2023-08-03 22:02:44,788 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:02:44,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:02:44,842 INFO L322 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2023-08-03 22:02:44,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2023-08-03 22:02:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:02:44,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:02:44,921 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 25 treesize of output 23 [2023-08-03 22:02:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:02:44,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442678916] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:02:44,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:02:44,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 10] total 20 [2023-08-03 22:02:44,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371184290] [2023-08-03 22:02:44,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:02:44,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-03 22:02:44,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:02:44,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-03 22:02:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-08-03 22:02:45,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 229 [2023-08-03 22:02:45,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 4398 transitions, 95473 flow. Second operand has 21 states, 21 states have (on average 81.52380952380952) internal successors, (1712), 21 states have internal predecessors, (1712), 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 22:02:45,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:02:45,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 229 [2023-08-03 22:02:45,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:02:51,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-03 22:02:56,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-03 22:03:01,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-03 22:03:04,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-03 22:03:11,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-08-03 22:04:17,514 INFO L124 PetriNetUnfolderBase]: 46995/78240 cut-off events. [2023-08-03 22:04:17,514 INFO L125 PetriNetUnfolderBase]: For 4612985/4612985 co-relation queries the response was YES. [2023-08-03 22:04:19,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 954275 conditions, 78240 events. 46995/78240 cut-off events. For 4612985/4612985 co-relation queries the response was YES. Maximal size of possible extension queue 1963. Compared 686037 event pairs, 4716 based on Foata normal form. 1525/79761 useless extension candidates. Maximal degree in co-relation 952174. Up to 19144 conditions per place. [2023-08-03 22:04:19,727 INFO L140 encePairwiseOnDemand]: 210/229 looper letters, 2342 selfloop transitions, 5180 changer transitions 33/7558 dead transitions. [2023-08-03 22:04:19,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 7558 transitions, 179314 flow [2023-08-03 22:04:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-08-03 22:04:19,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2023-08-03 22:04:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 6889 transitions. [2023-08-03 22:04:19,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37603711790393013 [2023-08-03 22:04:19,734 INFO L72 ComplementDD]: Start complementDD. Operand 80 states and 6889 transitions. [2023-08-03 22:04:19,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 6889 transitions. [2023-08-03 22:04:19,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:04:19,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 80 states and 6889 transitions. [2023-08-03 22:04:19,744 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 81 states, 80 states have (on average 86.1125) internal successors, (6889), 80 states have internal predecessors, (6889), 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 22:04:19,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 81 states, 81 states have (on average 229.0) internal successors, (18549), 81 states have internal predecessors, (18549), 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 22:04:19,760 INFO L81 ComplementDD]: Finished complementDD. Result has 81 states, 81 states have (on average 229.0) internal successors, (18549), 81 states have internal predecessors, (18549), 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 22:04:19,760 INFO L175 Difference]: Start difference. First operand has 534 places, 4398 transitions, 95473 flow. Second operand 80 states and 6889 transitions. [2023-08-03 22:04:19,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 7558 transitions, 179314 flow [2023-08-03 22:05:51,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 590 places, 7558 transitions, 173620 flow, removed 1823 selfloop flow, removed 23 redundant places. [2023-08-03 22:05:51,975 INFO L231 Difference]: Finished difference. Result has 605 places, 6370 transitions, 152525 flow [2023-08-03 22:05:51,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=92073, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=834, PETRI_DIFFERENCE_SUBTRAHEND_STATES=80, PETRI_FLOW=152525, PETRI_PLACES=605, PETRI_TRANSITIONS=6370} [2023-08-03 22:05:51,980 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 572 predicate places. [2023-08-03 22:05:51,980 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 6370 transitions, 152525 flow [2023-08-03 22:05:51,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 81.52380952380952) internal successors, (1712), 21 states have internal predecessors, (1712), 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 22:05:51,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:05:51,981 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:05:51,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 22:05:52,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:05:52,187 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:05:52,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:05:52,188 INFO L85 PathProgramCache]: Analyzing trace with hash 591546411, now seen corresponding path program 2 times [2023-08-03 22:05:52,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:05:52,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221994044] [2023-08-03 22:05:52,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:05:52,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:05:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:05:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:05:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:05:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221994044] [2023-08-03 22:05:52,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221994044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:05:52,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143967013] [2023-08-03 22:05:52,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 22:05:52,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:05:52,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:05:52,354 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:05:52,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 22:05:52,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 22:05:52,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 22:05:52,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-03 22:05:52,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:05:52,507 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 15 treesize of output 11 [2023-08-03 22:05:52,532 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:05:52,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:05:52,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:05:52,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:05:52,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:05:52,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143967013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:05:52,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:05:52,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-08-03 22:05:52,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519113511] [2023-08-03 22:05:52,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:05:52,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 22:05:52,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:05:52,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 22:05:52,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-03 22:05:52,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 229 [2023-08-03 22:05:52,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 6370 transitions, 152525 flow. Second operand has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 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 22:05:52,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:05:52,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 229 [2023-08-03 22:05:52,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:07:52,180 INFO L124 PetriNetUnfolderBase]: 48830/83833 cut-off events. [2023-08-03 22:07:52,180 INFO L125 PetriNetUnfolderBase]: For 5436816/5441535 co-relation queries the response was YES. [2023-08-03 22:07:54,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1096833 conditions, 83833 events. 48830/83833 cut-off events. For 5436816/5441535 co-relation queries the response was YES. Maximal size of possible extension queue 2252. Compared 773425 event pairs, 6489 based on Foata normal form. 4753/88342 useless extension candidates. Maximal degree in co-relation 1094014. Up to 24719 conditions per place. [2023-08-03 22:07:54,936 INFO L140 encePairwiseOnDemand]: 217/229 looper letters, 3882 selfloop transitions, 5559 changer transitions 16/9678 dead transitions. [2023-08-03 22:07:54,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 9678 transitions, 248803 flow [2023-08-03 22:07:54,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-03 22:07:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-03 22:07:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3996 transitions. [2023-08-03 22:07:54,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39658594680428744 [2023-08-03 22:07:54,941 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3996 transitions. [2023-08-03 22:07:54,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3996 transitions. [2023-08-03 22:07:54,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:07:54,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3996 transitions. [2023-08-03 22:07:54,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 90.81818181818181) internal successors, (3996), 44 states have internal predecessors, (3996), 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 22:07:54,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 229.0) internal successors, (10305), 45 states have internal predecessors, (10305), 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 22:07:54,954 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 229.0) internal successors, (10305), 45 states have internal predecessors, (10305), 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 22:07:54,954 INFO L175 Difference]: Start difference. First operand has 605 places, 6370 transitions, 152525 flow. Second operand 44 states and 3996 transitions. [2023-08-03 22:07:54,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 9678 transitions, 248803 flow [2023-08-03 22:09:40,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 9678 transitions, 239919 flow, removed 2793 selfloop flow, removed 33 redundant places. [2023-08-03 22:09:41,027 INFO L231 Difference]: Finished difference. Result has 625 places, 7606 transitions, 194060 flow [2023-08-03 22:09:41,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=147262, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=194060, PETRI_PLACES=625, PETRI_TRANSITIONS=7606} [2023-08-03 22:09:41,032 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 592 predicate places. [2023-08-03 22:09:41,032 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 7606 transitions, 194060 flow [2023-08-03 22:09:41,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 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 22:09:41,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:09:41,032 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:09:41,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 22:09:41,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-03 22:09:41,233 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thrErr0ASSERT_VIOLATIONERROR_FUNCTION === [thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION, thrErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:09:41,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:09:41,234 INFO L85 PathProgramCache]: Analyzing trace with hash -368284782, now seen corresponding path program 2 times [2023-08-03 22:09:41,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:09:41,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950303421] [2023-08-03 22:09:41,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:09:41,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:09:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:09:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 22:09:41,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:09:41,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950303421] [2023-08-03 22:09:41,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950303421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:09:41,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508038684] [2023-08-03 22:09:41,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 22:09:41,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:09:41,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:09:41,402 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:09:41,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 22:09:41,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-03 22:09:41,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 22:09:41,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-03 22:09:41,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:09:41,574 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 15 treesize of output 11 [2023-08-03 22:09:41,600 INFO L322 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-08-03 22:09:41,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 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 27 treesize of output 26 [2023-08-03 22:09:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 22:09:41,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:09:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 22:09:41,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508038684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:09:41,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:09:41,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 14 [2023-08-03 22:09:41,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668430592] [2023-08-03 22:09:41,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:09:41,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-03 22:09:41,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:09:41,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-03 22:09:41,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-08-03 22:09:41,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 229 [2023-08-03 22:09:41,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 7606 transitions, 194060 flow. Second operand has 15 states, 15 states have (on average 83.2) internal successors, (1248), 15 states have internal predecessors, (1248), 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 22:09:41,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:09:41,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 229 [2023-08-03 22:09:41,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:12:33,081 INFO L124 PetriNetUnfolderBase]: 52277/88284 cut-off events. [2023-08-03 22:12:33,082 INFO L125 PetriNetUnfolderBase]: For 5265805/5273845 co-relation queries the response was YES. [2023-08-03 22:12:35,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1160758 conditions, 88284 events. 52277/88284 cut-off events. For 5265805/5273845 co-relation queries the response was YES. Maximal size of possible extension queue 2329. Compared 801819 event pairs, 4469 based on Foata normal form. 7496/95301 useless extension candidates. Maximal degree in co-relation 1149010. Up to 22623 conditions per place. [2023-08-03 22:12:36,247 INFO L140 encePairwiseOnDemand]: 213/229 looper letters, 6989 selfloop transitions, 2369 changer transitions 16/10029 dead transitions. [2023-08-03 22:12:36,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 670 places, 10029 transitions, 271472 flow [2023-08-03 22:12:36,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-03 22:12:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-03 22:12:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3988 transitions. [2023-08-03 22:12:36,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37858363394721856 [2023-08-03 22:12:36,251 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3988 transitions. [2023-08-03 22:12:36,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3988 transitions. [2023-08-03 22:12:36,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:12:36,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3988 transitions. [2023-08-03 22:12:36,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 86.69565217391305) internal successors, (3988), 46 states have internal predecessors, (3988), 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 22:12:36,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 229.0) internal successors, (10763), 47 states have internal predecessors, (10763), 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 22:12:36,264 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 229.0) internal successors, (10763), 47 states have internal predecessors, (10763), 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 22:12:36,264 INFO L175 Difference]: Start difference. First operand has 625 places, 7606 transitions, 194060 flow. Second operand 46 states and 3988 transitions. [2023-08-03 22:12:36,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 670 places, 10029 transitions, 271472 flow Received shutdown request... [2023-08-03 22:13:01,375 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 22:13:01,375 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-03 22:13:01,375 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 22:13:01,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 22:13:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-03 22:13:01,577 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-03 22:13:01,577 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 22:13:01,577 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thrErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 22:13:01,577 INFO L445 BasicCegarLoop]: Path program histogram: [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 22:13:01,577 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT,TIMEOUT,TIMEOUT (2/2) [2023-08-03 22:13:01,579 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:13:01,579 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:13:01,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:13:01 BasicIcfg [2023-08-03 22:13:01,583 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:13:01,584 INFO L158 Benchmark]: Toolchain (without parser) took 777574.64ms. Allocated memory was 469.8MB in the beginning and 9.8GB in the end (delta: 9.4GB). Free memory was 420.5MB in the beginning and 6.1GB in the end (delta: -5.7GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-03 22:13:01,584 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 339.7MB. Free memory was 293.1MB in the beginning and 293.1MB in the end (delta: 34.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:13:01,584 INFO L158 Benchmark]: CACSL2BoogieTranslator took 655.51ms. Allocated memory is still 469.8MB. Free memory was 420.2MB in the beginning and 391.8MB in the end (delta: 28.4MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-03 22:13:01,584 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.11ms. Allocated memory is still 469.8MB. Free memory was 391.8MB in the beginning and 389.3MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-03 22:13:01,585 INFO L158 Benchmark]: Boogie Preprocessor took 38.10ms. Allocated memory is still 469.8MB. Free memory was 389.3MB in the beginning and 387.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:13:01,585 INFO L158 Benchmark]: RCFGBuilder took 433.04ms. Allocated memory is still 469.8MB. Free memory was 387.6MB in the beginning and 424.5MB in the end (delta: -37.0MB). Peak memory consumption was 11.6MB. Max. memory is 16.0GB. [2023-08-03 22:13:01,585 INFO L158 Benchmark]: TraceAbstraction took 776370.66ms. Allocated memory was 469.8MB in the beginning and 9.8GB in the end (delta: 9.4GB). Free memory was 424.1MB in the beginning and 6.1GB in the end (delta: -5.7GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-03 22:13:01,586 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 339.7MB. Free memory was 293.1MB in the beginning and 293.1MB in the end (delta: 34.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 655.51ms. Allocated memory is still 469.8MB. Free memory was 420.2MB in the beginning and 391.8MB in the end (delta: 28.4MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 67.11ms. Allocated memory is still 469.8MB. Free memory was 391.8MB in the beginning and 389.3MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.10ms. Allocated memory is still 469.8MB. Free memory was 389.3MB in the beginning and 387.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 433.04ms. Allocated memory is still 469.8MB. Free memory was 387.6MB in the beginning and 424.5MB in the end (delta: -37.0MB). Peak memory consumption was 11.6MB. Max. memory is 16.0GB. * TraceAbstraction took 776370.66ms. Allocated memory was 469.8MB in the beginning and 9.8GB in the end (delta: 9.4GB). Free memory was 424.1MB in the beginning and 6.1GB in the end (delta: -5.7GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 82 PlacesBefore, 14 PlacesAfterwards, 85 TransitionsBefore, 13 TransitionsAfterwards, 1122 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 10 ConcurrentYvCompositions, 4 ChoiceCompositions, 88 TotalNumberOfCompositions, 1201 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 950, independent: 894, independent conditional: 0, independent unconditional: 894, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 608, independent: 595, independent conditional: 0, independent unconditional: 595, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 950, independent: 299, independent conditional: 0, independent unconditional: 299, dependent: 43, dependent conditional: 0, dependent unconditional: 43, unknown: 608, unknown conditional: 0, unknown unconditional: 608] , Statistics on independence cache: Total cache size (in pairs): 18, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 114 PlacesBefore, 34 PlacesAfterwards, 119 TransitionsBefore, 33 TransitionsAfterwards, 4488 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 54 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 14 ConcurrentYvCompositions, 6 ChoiceCompositions, 111 TotalNumberOfCompositions, 9655 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4682, independent: 4421, independent conditional: 0, independent unconditional: 4421, dependent: 261, dependent conditional: 0, dependent unconditional: 261, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2372, independent: 2327, independent conditional: 0, independent unconditional: 2327, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4682, independent: 2094, independent conditional: 0, independent unconditional: 2094, dependent: 216, dependent conditional: 0, dependent unconditional: 216, unknown: 2372, unknown conditional: 0, unknown unconditional: 2372] , Statistics on independence cache: Total cache size (in pairs): 160, Positive cache size: 141, Positive conditional cache size: 0, Positive unconditional cache size: 141, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 114 PlacesBefore, 33 PlacesAfterwards, 119 TransitionsBefore, 32 TransitionsAfterwards, 4488 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 55 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 13 ConcurrentYvCompositions, 6 ChoiceCompositions, 110 TotalNumberOfCompositions, 9918 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5348, independent: 5077, independent conditional: 0, independent unconditional: 5077, dependent: 271, dependent conditional: 0, dependent unconditional: 271, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2390, independent: 2345, independent conditional: 0, independent unconditional: 2345, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5348, independent: 2732, independent conditional: 0, independent unconditional: 2732, dependent: 226, dependent conditional: 0, dependent unconditional: 226, unknown: 2390, unknown conditional: 0, unknown unconditional: 2390] , Statistics on independence cache: Total cache size (in pairs): 154, Positive cache size: 135, Positive conditional cache size: 0, Positive unconditional cache size: 135, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 998]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 110 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: 3.2s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 140 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: 3.7s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 59 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 107 IncrementalHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 107 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=78occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 56 SizeOfPredicates, 0 NumberOfNonLiveVariables, 117 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, 140 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: 769.3s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 758.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 21 mSolverCounterUnknown, 6885 SdHoareTripleChecker+Valid, 21.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6311 mSDsluCounter, 4188 SdHoareTripleChecker+Invalid, 19.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 637 IncrementalHoareTripleChecker+Unchecked, 4042 mSDsCounter, 639 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18370 IncrementalHoareTripleChecker+Invalid, 19667 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 639 mSolverCounterUnsat, 146 mSDtfsCounter, 18370 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1501 GetRequests, 832 SyntacticMatches, 14 SemanticMatches, 655 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 13467 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=194060occurred in iteration=19, InterpolantAutomatonStates: 576, 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, 0.4s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 704 NumberOfCodeBlocks, 692 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 908 ConstructedInterpolants, 3 QuantifiedInterpolants, 4275 SizeOfPredicates, 59 NumberOfNonLiveVariables, 1942 ConjunctsInSsa, 244 ConjunctsInUnsatCore, 39 InterpolantComputations, 11 PerfectInterpolantSequences, 83/174 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown