/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-2_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:23:38,411 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:23:38,486 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:23:38,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:23:38,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:23:38,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:23:38,494 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:23:38,527 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:23:38,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:23:38,527 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:23:38,528 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:23:38,528 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:23:38,532 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:23:38,536 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:23:38,537 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:23:38,537 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:23:38,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:23:38,539 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:23:38,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:23:38,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:23:38,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:23:38,540 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:23:38,540 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:23:38,540 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:23:38,542 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:23:38,542 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:23:38,542 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:23:38,543 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:23:38,543 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:23:38,543 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:23:38,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:23:38,544 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:23:38,544 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:23:38,544 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:23:38,545 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:23:38,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:23:38,545 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:23:38,545 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:23:38,545 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:23:38,545 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:23:38,545 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:23:38,546 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:23:38,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:23:38,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:23:38,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:23:38,776 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:23:38,776 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:23:38,777 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-2_bound2.i [2023-08-04 04:23:39,985 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:23:40,209 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:23:40,210 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-2_bound2.i [2023-08-04 04:23:40,223 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01702ed35/7c0a0f7babda4742bbd8c840416b898d/FLAGdf1ad7d34 [2023-08-04 04:23:40,235 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01702ed35/7c0a0f7babda4742bbd8c840416b898d [2023-08-04 04:23:40,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:23:40,239 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:23:40,240 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:23:40,240 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:23:40,243 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:23:40,244 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c3bff6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40, skipping insertion in model container [2023-08-04 04:23:40,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,284 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:23:40,529 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-2_bound2.i[31164,31177] [2023-08-04 04:23:40,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:23:40,559 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:23:40,587 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-04 04:23:40,589 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-04 04:23:40,613 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-2_bound2.i[31164,31177] [2023-08-04 04:23:40,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:23:40,652 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:23:40,654 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40 WrapperNode [2023-08-04 04:23:40,654 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:23:40,656 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:23:40,656 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:23:40,656 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:23:40,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,695 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,729 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 192 [2023-08-04 04:23:40,730 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:23:40,731 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:23:40,731 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:23:40,731 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:23:40,740 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,740 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,754 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,754 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,769 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,771 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,772 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,785 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:23:40,786 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:23:40,786 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:23:40,786 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:23:40,787 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (1/1) ... [2023-08-04 04:23:40,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:23:40,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:23:40,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 04:23:40,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 04:23:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:23:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-04 04:23:40,869 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-04 04:23:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:23:40,869 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:23:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:23:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:23:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:23:40,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:23:40,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:23:40,871 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 04:23:40,986 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:23:40,989 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:23:41,304 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:23:41,443 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:23:41,444 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 04:23:41,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:23:41 BoogieIcfgContainer [2023-08-04 04:23:41,446 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:23:41,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:23:41,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:23:41,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:23:41,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:23:40" (1/3) ... [2023-08-04 04:23:41,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378e1a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:23:41, skipping insertion in model container [2023-08-04 04:23:41,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:23:40" (2/3) ... [2023-08-04 04:23:41,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378e1a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:23:41, skipping insertion in model container [2023-08-04 04:23:41,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:23:41" (3/3) ... [2023-08-04 04:23:41,454 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_26_stack_cas_longest-2_bound2.i [2023-08-04 04:23:41,461 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:23:41,470 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:23:41,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 04:23:41,471 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:23:41,537 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:23:41,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:41,650 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-04 04:23:41,651 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:41,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-04 04:23:41,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:41,662 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:41,666 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:23:41,690 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:41,694 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:41,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:23:41,742 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-04 04:23:41,742 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:41,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-04 04:23:41,745 INFO L119 LiptonReduction]: Number of co-enabled transitions 2496 [2023-08-04 04:23:45,853 INFO L134 LiptonReduction]: Checked pairs total: 2969 [2023-08-04 04:23:45,854 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-04 04:23:45,874 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:23:45,879 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;@79eee76d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:23:45,880 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 04:23:45,885 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:23:45,885 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-08-04 04:23:45,886 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:45,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:45,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:45,887 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:45,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:45,891 INFO L85 PathProgramCache]: Analyzing trace with hash -938850934, now seen corresponding path program 1 times [2023-08-04 04:23:45,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:45,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834081212] [2023-08-04 04:23:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:45,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:46,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:46,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834081212] [2023-08-04 04:23:46,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834081212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:23:46,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:23:46,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:23:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487993264] [2023-08-04 04:23:46,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:23:46,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:23:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:46,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:23:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:23:46,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 226 [2023-08-04 04:23:46,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 28 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:46,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 226 [2023-08-04 04:23:46,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:46,260 INFO L124 PetriNetUnfolderBase]: 61/130 cut-off events. [2023-08-04 04:23:46,261 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:46,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 130 events. 61/130 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 321 event pairs, 3 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 248. Up to 115 conditions per place. [2023-08-04 04:23:46,263 INFO L140 encePairwiseOnDemand]: 221/226 looper letters, 24 selfloop transitions, 2 changer transitions 1/28 dead transitions. [2023-08-04 04:23:46,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 28 transitions, 115 flow [2023-08-04 04:23:46,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:23:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:23:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 336 transitions. [2023-08-04 04:23:46,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49557522123893805 [2023-08-04 04:23:46,286 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 336 transitions. [2023-08-04 04:23:46,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 336 transitions. [2023-08-04 04:23:46,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:46,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 336 transitions. [2023-08-04 04:23:46,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,304 INFO L175 Difference]: Start difference. First operand has 24 places, 28 transitions, 61 flow. Second operand 3 states and 336 transitions. [2023-08-04 04:23:46,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 28 transitions, 115 flow [2023-08-04 04:23:46,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 28 transitions, 115 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:23:46,309 INFO L231 Difference]: Finished difference. Result has 26 places, 24 transitions, 57 flow [2023-08-04 04:23:46,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=26, PETRI_TRANSITIONS=24} [2023-08-04 04:23:46,314 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-08-04 04:23:46,315 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 24 transitions, 57 flow [2023-08-04 04:23:46,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:46,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:46,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:23:46,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:46,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:46,317 INFO L85 PathProgramCache]: Analyzing trace with hash -491700112, now seen corresponding path program 1 times [2023-08-04 04:23:46,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:46,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441104089] [2023-08-04 04:23:46,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:46,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:46,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:46,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:46,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441104089] [2023-08-04 04:23:46,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441104089] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:23:46,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:23:46,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:23:46,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999455518] [2023-08-04 04:23:46,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:23:46,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:23:46,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:46,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:23:46,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:23:46,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 226 [2023-08-04 04:23:46,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 24 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:46,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 226 [2023-08-04 04:23:46,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:46,505 INFO L124 PetriNetUnfolderBase]: 73/158 cut-off events. [2023-08-04 04:23:46,505 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 04:23:46,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 327 conditions, 158 events. 73/158 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 425 event pairs, 21 based on Foata normal form. 4/121 useless extension candidates. Maximal degree in co-relation 308. Up to 101 conditions per place. [2023-08-04 04:23:46,512 INFO L140 encePairwiseOnDemand]: 223/226 looper letters, 28 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 04:23:46,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 135 flow [2023-08-04 04:23:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:23:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:23:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-04 04:23:46,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4941002949852507 [2023-08-04 04:23:46,515 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-04 04:23:46,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-04 04:23:46,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:46,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-04 04:23:46,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,521 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,521 INFO L175 Difference]: Start difference. First operand has 26 places, 24 transitions, 57 flow. Second operand 3 states and 335 transitions. [2023-08-04 04:23:46,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 135 flow [2023-08-04 04:23:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 32 transitions, 131 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:23:46,523 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 65 flow [2023-08-04 04:23:46,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-04 04:23:46,524 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 2 predicate places. [2023-08-04 04:23:46,525 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 65 flow [2023-08-04 04:23:46,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:46,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:46,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 04:23:46,534 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:46,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash -488589355, now seen corresponding path program 1 times [2023-08-04 04:23:46,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:46,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373665450] [2023-08-04 04:23:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:46,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:46,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:46,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373665450] [2023-08-04 04:23:46,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373665450] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:23:46,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:23:46,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:23:46,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978814987] [2023-08-04 04:23:46,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:23:46,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:23:46,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:23:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:23:46,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 226 [2023-08-04 04:23:46,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:46,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 226 [2023-08-04 04:23:46,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:46,823 INFO L124 PetriNetUnfolderBase]: 104/225 cut-off events. [2023-08-04 04:23:46,823 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:23:46,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 225 events. 104/225 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 569 event pairs, 18 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 454. Up to 101 conditions per place. [2023-08-04 04:23:46,825 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 44 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2023-08-04 04:23:46,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 51 transitions, 217 flow [2023-08-04 04:23:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:23:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:23:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 615 transitions. [2023-08-04 04:23:46,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45353982300884954 [2023-08-04 04:23:46,828 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 615 transitions. [2023-08-04 04:23:46,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 615 transitions. [2023-08-04 04:23:46,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:46,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 615 transitions. [2023-08-04 04:23:46,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 102.5) internal successors, (615), 6 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,833 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,833 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 65 flow. Second operand 6 states and 615 transitions. [2023-08-04 04:23:46,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 51 transitions, 217 flow [2023-08-04 04:23:46,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 51 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:23:46,836 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 93 flow [2023-08-04 04:23:46,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-04 04:23:46,837 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 9 predicate places. [2023-08-04 04:23:46,838 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 93 flow [2023-08-04 04:23:46,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.4) internal successors, (482), 5 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:46,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:46,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:46,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:23:46,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:46,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:46,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2032773347, now seen corresponding path program 1 times [2023-08-04 04:23:46,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:46,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13438106] [2023-08-04 04:23:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:46,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:47,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:47,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:47,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13438106] [2023-08-04 04:23:47,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13438106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:23:47,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:23:47,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-04 04:23:47,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685635145] [2023-08-04 04:23:47,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:23:47,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 04:23:47,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:47,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 04:23:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:23:47,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 226 [2023-08-04 04:23:47,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 93 flow. Second operand has 10 states, 10 states have (on average 80.6) internal successors, (806), 10 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:47,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:47,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 226 [2023-08-04 04:23:47,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:48,187 INFO L124 PetriNetUnfolderBase]: 121/268 cut-off events. [2023-08-04 04:23:48,187 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 04:23:48,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 268 events. 121/268 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 760 event pairs, 9 based on Foata normal form. 0/216 useless extension candidates. Maximal degree in co-relation 592. Up to 116 conditions per place. [2023-08-04 04:23:48,189 INFO L140 encePairwiseOnDemand]: 215/226 looper letters, 57 selfloop transitions, 17 changer transitions 1/76 dead transitions. [2023-08-04 04:23:48,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 76 transitions, 350 flow [2023-08-04 04:23:48,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 04:23:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 04:23:48,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 944 transitions. [2023-08-04 04:23:48,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797264682220434 [2023-08-04 04:23:48,193 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 944 transitions. [2023-08-04 04:23:48,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 944 transitions. [2023-08-04 04:23:48,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:48,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 944 transitions. [2023-08-04 04:23:48,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 85.81818181818181) internal successors, (944), 11 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:48,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 226.0) internal successors, (2712), 12 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:48,202 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 226.0) internal successors, (2712), 12 states have internal predecessors, (2712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:48,203 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 93 flow. Second operand 11 states and 944 transitions. [2023-08-04 04:23:48,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 76 transitions, 350 flow [2023-08-04 04:23:48,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 76 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:23:48,207 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 194 flow [2023-08-04 04:23:48,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=194, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-04 04:23:48,209 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 22 predicate places. [2023-08-04 04:23:48,209 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 194 flow [2023-08-04 04:23:48,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 80.6) internal successors, (806), 10 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:48,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:48,210 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:48,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:23:48,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:48,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:48,211 INFO L85 PathProgramCache]: Analyzing trace with hash -23212586, now seen corresponding path program 1 times [2023-08-04 04:23:48,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:48,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488131831] [2023-08-04 04:23:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:48,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:48,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:48,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:48,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488131831] [2023-08-04 04:23:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488131831] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:23:48,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907033731] [2023-08-04 04:23:48,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:48,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:23:48,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:23:48,851 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:23:48,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 04:23:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:48,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-04 04:23:48,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:23:49,020 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 04:23:49,021 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-04 04:23:49,343 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 04:23:49,344 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 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-04 04:23:49,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 04:23:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:49,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:23:49,441 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_142 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t~0#1.base| v_ArrVal_142) |c_~#top~0.base|) |c_~#top~0.offset|) 0))) is different from false [2023-08-04 04:23:49,614 INFO L322 Elim1Store]: treesize reduction 15, result has 64.3 percent of original size [2023-08-04 04:23:49,614 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 2 case distinctions, treesize of input 35 treesize of output 38 [2023-08-04 04:23:49,627 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:23:49,628 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2023-08-04 04:23:49,640 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 20 treesize of output 18 [2023-08-04 04:23:49,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-04 04:23:49,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907033731] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:23:49,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:23:49,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 22 [2023-08-04 04:23:49,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690979277] [2023-08-04 04:23:49,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:23:49,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 04:23:49,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 04:23:49,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=4, NotChecked=42, Total=552 [2023-08-04 04:23:49,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 226 [2023-08-04 04:23:49,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 194 flow. Second operand has 24 states, 24 states have (on average 57.166666666666664) internal successors, (1372), 24 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:49,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:49,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 226 [2023-08-04 04:23:49,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:54,058 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 [1] [2023-08-04 04:23:56,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 04:23:56,541 INFO L124 PetriNetUnfolderBase]: 357/798 cut-off events. [2023-08-04 04:23:56,542 INFO L125 PetriNetUnfolderBase]: For 817/817 co-relation queries the response was YES. [2023-08-04 04:23:56,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2459 conditions, 798 events. 357/798 cut-off events. For 817/817 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3148 event pairs, 8 based on Foata normal form. 15/757 useless extension candidates. Maximal degree in co-relation 2394. Up to 161 conditions per place. [2023-08-04 04:23:56,548 INFO L140 encePairwiseOnDemand]: 210/226 looper letters, 186 selfloop transitions, 123 changer transitions 1/311 dead transitions. [2023-08-04 04:23:56,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 311 transitions, 1934 flow [2023-08-04 04:23:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-04 04:23:56,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-04 04:23:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2769 transitions. [2023-08-04 04:23:56,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27227138643067844 [2023-08-04 04:23:56,559 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2769 transitions. [2023-08-04 04:23:56,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2769 transitions. [2023-08-04 04:23:56,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:56,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2769 transitions. [2023-08-04 04:23:56,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 61.53333333333333) internal successors, (2769), 45 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:56,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 226.0) internal successors, (10396), 46 states have internal predecessors, (10396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:56,586 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 226.0) internal successors, (10396), 46 states have internal predecessors, (10396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:56,586 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 194 flow. Second operand 45 states and 2769 transitions. [2023-08-04 04:23:56,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 311 transitions, 1934 flow [2023-08-04 04:23:56,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 311 transitions, 1911 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-04 04:23:56,595 INFO L231 Difference]: Finished difference. Result has 115 places, 172 transitions, 1274 flow [2023-08-04 04:23:56,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=1274, PETRI_PLACES=115, PETRI_TRANSITIONS=172} [2023-08-04 04:23:56,596 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 91 predicate places. [2023-08-04 04:23:56,596 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 172 transitions, 1274 flow [2023-08-04 04:23:56,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.166666666666664) internal successors, (1372), 24 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:56,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:56,597 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] [2023-08-04 04:23:56,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 04:23:56,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:23:56,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:56,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1349838642, now seen corresponding path program 1 times [2023-08-04 04:23:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:56,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448139266] [2023-08-04 04:23:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:56,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:56,886 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:56,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:56,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448139266] [2023-08-04 04:23:56,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448139266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:23:56,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35008151] [2023-08-04 04:23:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:56,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:23:56,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:23:56,888 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:23:56,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 04:23:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:57,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:23:57,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:23:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:57,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:23:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:57,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35008151] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:23:57,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:23:57,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-04 04:23:57,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614264015] [2023-08-04 04:23:57,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:23:57,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:23:57,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:57,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:23:57,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:23:57,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 226 [2023-08-04 04:23:57,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 172 transitions, 1274 flow. Second operand has 7 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:57,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:57,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 226 [2023-08-04 04:23:57,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:57,485 INFO L124 PetriNetUnfolderBase]: 424/951 cut-off events. [2023-08-04 04:23:57,485 INFO L125 PetriNetUnfolderBase]: For 7043/7043 co-relation queries the response was YES. [2023-08-04 04:23:57,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4959 conditions, 951 events. 424/951 cut-off events. For 7043/7043 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3283 event pairs, 37 based on Foata normal form. 21/972 useless extension candidates. Maximal degree in co-relation 4853. Up to 402 conditions per place. [2023-08-04 04:23:57,497 INFO L140 encePairwiseOnDemand]: 222/226 looper letters, 213 selfloop transitions, 20 changer transitions 4/238 dead transitions. [2023-08-04 04:23:57,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 238 transitions, 2284 flow [2023-08-04 04:23:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:23:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:23:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 682 transitions. [2023-08-04 04:23:57,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5029498525073747 [2023-08-04 04:23:57,499 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 682 transitions. [2023-08-04 04:23:57,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 682 transitions. [2023-08-04 04:23:57,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:57,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 682 transitions. [2023-08-04 04:23:57,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.66666666666667) internal successors, (682), 6 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:57,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:57,504 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 226.0) internal successors, (1582), 7 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:57,504 INFO L175 Difference]: Start difference. First operand has 115 places, 172 transitions, 1274 flow. Second operand 6 states and 682 transitions. [2023-08-04 04:23:57,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 238 transitions, 2284 flow [2023-08-04 04:23:57,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 238 transitions, 2018 flow, removed 133 selfloop flow, removed 5 redundant places. [2023-08-04 04:23:57,536 INFO L231 Difference]: Finished difference. Result has 106 places, 150 transitions, 1068 flow [2023-08-04 04:23:57,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1068, PETRI_PLACES=106, PETRI_TRANSITIONS=150} [2023-08-04 04:23:57,537 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 82 predicate places. [2023-08-04 04:23:57,537 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 150 transitions, 1068 flow [2023-08-04 04:23:57,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 107.42857142857143) internal successors, (752), 7 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:57,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:57,537 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] [2023-08-04 04:23:57,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 04:23:57,743 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,SelfDestructingSolverStorable5 [2023-08-04 04:23:57,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:57,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:57,744 INFO L85 PathProgramCache]: Analyzing trace with hash -514717258, now seen corresponding path program 1 times [2023-08-04 04:23:57,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:57,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728924559] [2023-08-04 04:23:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:57,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:23:57,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:57,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728924559] [2023-08-04 04:23:57,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728924559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:23:57,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547313206] [2023-08-04 04:23:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:57,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:23:57,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:23:57,852 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) [2023-08-04 04:23:57,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 04:23:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:57,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:23:57,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:23:58,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:23:58,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:23:58,022 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:23:58,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547313206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:23:58,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:23:58,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:23:58,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503982985] [2023-08-04 04:23:58,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:23:58,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:23:58,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:23:58,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:23:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:23:58,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 226 [2023-08-04 04:23:58,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 150 transitions, 1068 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:58,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:23:58,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 226 [2023-08-04 04:23:58,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:23:58,285 INFO L124 PetriNetUnfolderBase]: 293/803 cut-off events. [2023-08-04 04:23:58,286 INFO L125 PetriNetUnfolderBase]: For 4464/4464 co-relation queries the response was YES. [2023-08-04 04:23:58,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3791 conditions, 803 events. 293/803 cut-off events. For 4464/4464 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3268 event pairs, 14 based on Foata normal form. 116/919 useless extension candidates. Maximal degree in co-relation 3626. Up to 573 conditions per place. [2023-08-04 04:23:58,293 INFO L140 encePairwiseOnDemand]: 223/226 looper letters, 166 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2023-08-04 04:23:58,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 171 transitions, 1629 flow [2023-08-04 04:23:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:23:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:23:58,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 439 transitions. [2023-08-04 04:23:58,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4856194690265487 [2023-08-04 04:23:58,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 439 transitions. [2023-08-04 04:23:58,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 439 transitions. [2023-08-04 04:23:58,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:23:58,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 439 transitions. [2023-08-04 04:23:58,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:58,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 226.0) internal successors, (1130), 5 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:58,301 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 226.0) internal successors, (1130), 5 states have internal predecessors, (1130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:58,302 INFO L175 Difference]: Start difference. First operand has 106 places, 150 transitions, 1068 flow. Second operand 4 states and 439 transitions. [2023-08-04 04:23:58,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 171 transitions, 1629 flow [2023-08-04 04:23:58,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 171 transitions, 1556 flow, removed 14 selfloop flow, removed 14 redundant places. [2023-08-04 04:23:58,318 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 750 flow [2023-08-04 04:23:58,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=750, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2023-08-04 04:23:58,319 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 68 predicate places. [2023-08-04 04:23:58,319 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 750 flow [2023-08-04 04:23:58,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:23:58,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:23:58,320 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:23:58,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 04:23:58,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:23:58,529 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:23:58,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:23:58,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1798352566, now seen corresponding path program 1 times [2023-08-04 04:23:58,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:23:58,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645706880] [2023-08-04 04:23:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:58,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:23:58,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:59,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:23:59,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645706880] [2023-08-04 04:23:59,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645706880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:23:59,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842594843] [2023-08-04 04:23:59,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:23:59,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:23:59,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:23:59,009 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) [2023-08-04 04:23:59,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 04:23:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:23:59,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-04 04:23:59,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:23:59,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 04:23:59,512 INFO L322 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-08-04 04:23:59,513 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-08-04 04:23:59,556 INFO L322 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2023-08-04 04:23:59,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 85 [2023-08-04 04:23:59,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-08-04 04:23:59,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-08-04 04:23:59,677 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 0 case distinctions, treesize of input 17 treesize of output 6 [2023-08-04 04:23:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:23:59,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:24:00,121 INFO L322 Elim1Store]: treesize reduction 26, result has 65.3 percent of original size [2023-08-04 04:24:00,122 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 111 [2023-08-04 04:24:00,148 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:00,149 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 66 treesize of output 70 [2023-08-04 04:24:00,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-04 04:24:00,344 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:00,345 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 261 treesize of output 257 [2023-08-04 04:24:00,360 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:00,361 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 92 [2023-08-04 04:24:00,371 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:00,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 83 treesize of output 87 [2023-08-04 04:24:00,386 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:24:00,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 85 [2023-08-04 04:24:00,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 6 treesize of output 4 [2023-08-04 04:24:00,493 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-04 04:24:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:00,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842594843] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:24:00,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:24:00,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-04 04:24:00,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685718340] [2023-08-04 04:24:00,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:24:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 04:24:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 04:24:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-08-04 04:24:01,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 226 [2023-08-04 04:24:01,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 750 flow. Second operand has 24 states, 24 states have (on average 77.375) internal successors, (1857), 24 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:01,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:01,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 226 [2023-08-04 04:24:01,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:04,068 INFO L124 PetriNetUnfolderBase]: 451/1203 cut-off events. [2023-08-04 04:24:04,069 INFO L125 PetriNetUnfolderBase]: For 8247/8247 co-relation queries the response was YES. [2023-08-04 04:24:04,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1203 events. 451/1203 cut-off events. For 8247/8247 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 5154 event pairs, 6 based on Foata normal form. 26/1229 useless extension candidates. Maximal degree in co-relation 5689. Up to 410 conditions per place. [2023-08-04 04:24:04,083 INFO L140 encePairwiseOnDemand]: 211/226 looper letters, 179 selfloop transitions, 204 changer transitions 8/392 dead transitions. [2023-08-04 04:24:04,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 392 transitions, 3963 flow [2023-08-04 04:24:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-04 04:24:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-04 04:24:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4016 transitions. [2023-08-04 04:24:04,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484296373416623 [2023-08-04 04:24:04,095 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4016 transitions. [2023-08-04 04:24:04,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4016 transitions. [2023-08-04 04:24:04,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:04,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4016 transitions. [2023-08-04 04:24:04,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 78.74509803921569) internal successors, (4016), 51 states have internal predecessors, (4016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:04,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 226.0) internal successors, (11752), 52 states have internal predecessors, (11752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:04,130 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 226.0) internal successors, (11752), 52 states have internal predecessors, (11752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:04,130 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 750 flow. Second operand 51 states and 4016 transitions. [2023-08-04 04:24:04,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 392 transitions, 3963 flow [2023-08-04 04:24:04,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 392 transitions, 3914 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:24:04,160 INFO L231 Difference]: Finished difference. Result has 163 places, 273 transitions, 3199 flow [2023-08-04 04:24:04,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3199, PETRI_PLACES=163, PETRI_TRANSITIONS=273} [2023-08-04 04:24:04,161 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 139 predicate places. [2023-08-04 04:24:04,161 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 273 transitions, 3199 flow [2023-08-04 04:24:04,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 77.375) internal successors, (1857), 24 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:04,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:04,162 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:04,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 04:24:04,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:04,363 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:04,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:04,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1912837085, now seen corresponding path program 1 times [2023-08-04 04:24:04,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:04,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298052254] [2023-08-04 04:24:04,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:04,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-08-04 04:24:04,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:04,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298052254] [2023-08-04 04:24:04,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298052254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:04,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:04,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:24:04,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451132021] [2023-08-04 04:24:04,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:04,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:24:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:04,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:24:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:24:04,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 226 [2023-08-04 04:24:04,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 273 transitions, 3199 flow. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:04,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:04,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 226 [2023-08-04 04:24:04,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:05,024 INFO L124 PetriNetUnfolderBase]: 547/1437 cut-off events. [2023-08-04 04:24:05,024 INFO L125 PetriNetUnfolderBase]: For 14120/14120 co-relation queries the response was YES. [2023-08-04 04:24:05,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9097 conditions, 1437 events. 547/1437 cut-off events. For 14120/14120 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6708 event pairs, 159 based on Foata normal form. 9/1446 useless extension candidates. Maximal degree in co-relation 8854. Up to 1026 conditions per place. [2023-08-04 04:24:05,041 INFO L140 encePairwiseOnDemand]: 223/226 looper letters, 171 selfloop transitions, 11 changer transitions 165/348 dead transitions. [2023-08-04 04:24:05,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 348 transitions, 4779 flow [2023-08-04 04:24:05,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:24:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:24:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-04 04:24:05,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504424778761062 [2023-08-04 04:24:05,043 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-04 04:24:05,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-04 04:24:05,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:05,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-04 04:24:05,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:05,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:05,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 226.0) internal successors, (904), 4 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:05,045 INFO L175 Difference]: Start difference. First operand has 163 places, 273 transitions, 3199 flow. Second operand 3 states and 342 transitions. [2023-08-04 04:24:05,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 348 transitions, 4779 flow [2023-08-04 04:24:05,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 348 transitions, 3740 flow, removed 495 selfloop flow, removed 12 redundant places. [2023-08-04 04:24:05,145 INFO L231 Difference]: Finished difference. Result has 155 places, 152 transitions, 1356 flow [2023-08-04 04:24:05,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1356, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2023-08-04 04:24:05,147 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 131 predicate places. [2023-08-04 04:24:05,147 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 1356 flow [2023-08-04 04:24:05,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:05,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:05,147 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:05,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:24:05,148 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:05,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1697347414, now seen corresponding path program 1 times [2023-08-04 04:24:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:05,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012215281] [2023-08-04 04:24:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 107 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:24:05,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012215281] [2023-08-04 04:24:05,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012215281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:24:05,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591992329] [2023-08-04 04:24:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:05,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:05,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:24:05,492 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) [2023-08-04 04:24:05,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 04:24:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:05,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 04:24:05,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:24:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 122 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:24:05,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:24:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 122 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:24:05,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591992329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:24:05,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:24:05,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-04 04:24:05,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714207735] [2023-08-04 04:24:05,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:24:05,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 04:24:05,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:05,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 04:24:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-08-04 04:24:06,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 226 [2023-08-04 04:24:06,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 1356 flow. Second operand has 16 states, 16 states have (on average 101.8125) internal successors, (1629), 16 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:06,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:06,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 226 [2023-08-04 04:24:06,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:06,719 INFO L124 PetriNetUnfolderBase]: 218/703 cut-off events. [2023-08-04 04:24:06,719 INFO L125 PetriNetUnfolderBase]: For 2592/2592 co-relation queries the response was YES. [2023-08-04 04:24:06,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3633 conditions, 703 events. 218/703 cut-off events. For 2592/2592 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2673 event pairs, 23 based on Foata normal form. 3/706 useless extension candidates. Maximal degree in co-relation 3482. Up to 252 conditions per place. [2023-08-04 04:24:06,726 INFO L140 encePairwiseOnDemand]: 220/226 looper letters, 0 selfloop transitions, 0 changer transitions 183/183 dead transitions. [2023-08-04 04:24:06,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 183 transitions, 1943 flow [2023-08-04 04:24:06,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-04 04:24:06,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-04 04:24:06,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1791 transitions. [2023-08-04 04:24:06,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44026548672566373 [2023-08-04 04:24:06,729 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1791 transitions. [2023-08-04 04:24:06,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1791 transitions. [2023-08-04 04:24:06,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:06,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1791 transitions. [2023-08-04 04:24:06,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 99.5) internal successors, (1791), 18 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:06,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:06,739 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 226.0) internal successors, (4294), 19 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:06,739 INFO L175 Difference]: Start difference. First operand has 155 places, 152 transitions, 1356 flow. Second operand 18 states and 1791 transitions. [2023-08-04 04:24:06,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 183 transitions, 1943 flow [2023-08-04 04:24:06,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 183 transitions, 1667 flow, removed 55 selfloop flow, removed 28 redundant places. [2023-08-04 04:24:06,754 INFO L231 Difference]: Finished difference. Result has 136 places, 0 transitions, 0 flow [2023-08-04 04:24:06,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=226, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=0, PETRI_PLACES=136, PETRI_TRANSITIONS=0} [2023-08-04 04:24:06,755 INFO L281 CegarLoopForPetriNet]: 24 programPoint places, 112 predicate places. [2023-08-04 04:24:06,755 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 0 transitions, 0 flow [2023-08-04 04:24:06,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 101.8125) internal successors, (1629), 16 states have internal predecessors, (1629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:06,758 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-04 04:24:06,758 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-04 04:24:06,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 04:24:06,969 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,SelfDestructingSolverStorable9 [2023-08-04 04:24:06,969 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:06,971 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-04 04:24:06,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:06,992 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-04 04:24:06,992 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:06,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-04 04:24:06,992 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:06,993 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:06,993 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:24:06,993 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:06,994 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:06,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-04 04:24:07,002 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-04 04:24:07,002 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:07,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-04 04:24:07,004 INFO L119 LiptonReduction]: Number of co-enabled transitions 2496 [2023-08-04 04:24:12,036 INFO L134 LiptonReduction]: Checked pairs total: 3056 [2023-08-04 04:24:12,036 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-04 04:24:12,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:24:12,038 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;@79eee76d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:24:12,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:24:12,040 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:24:12,040 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-04 04:24:12,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:24:12,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:12,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 04:24:12,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:24:12,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:12,041 INFO L85 PathProgramCache]: Analyzing trace with hash -548958516, now seen corresponding path program 1 times [2023-08-04 04:24:12,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:12,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279232405] [2023-08-04 04:24:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:12,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:24:12,050 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:24:12,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:24:12,069 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:24:12,069 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:24:12,069 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:24:12,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 04:24:12,070 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:24:12,070 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 04:24:12,071 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:24:12,071 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:24:12,112 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 04:24:12,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:12,134 INFO L124 PetriNetUnfolderBase]: 21/222 cut-off events. [2023-08-04 04:24:12,135 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:24:12,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 222 events. 21/222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 404 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-08-04 04:24:12,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:12,138 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:12,138 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:24:12,138 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:12,138 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:12,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 197 transitions, 406 flow [2023-08-04 04:24:12,158 INFO L124 PetriNetUnfolderBase]: 21/222 cut-off events. [2023-08-04 04:24:12,159 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:24:12,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 222 events. 21/222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 404 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-08-04 04:24:12,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 17316 [2023-08-04 04:24:17,479 INFO L134 LiptonReduction]: Checked pairs total: 35420 [2023-08-04 04:24:17,479 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-04 04:24:17,481 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:24:17,481 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;@79eee76d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:24:17,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 04:24:17,484 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:24:17,485 INFO L124 PetriNetUnfolderBase]: 7/49 cut-off events. [2023-08-04 04:24:17,485 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:24:17,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:17,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:17,485 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:17,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:17,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2054394583, now seen corresponding path program 1 times [2023-08-04 04:24:17,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:17,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971933440] [2023-08-04 04:24:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:17,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:17,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:17,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971933440] [2023-08-04 04:24:17,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971933440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:17,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:17,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:24:17,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247320954] [2023-08-04 04:24:17,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:17,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:24:17,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:17,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:24:17,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:24:17,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 356 [2023-08-04 04:24:17,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 144 flow. Second operand has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:17,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:17,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 356 [2023-08-04 04:24:17,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:18,041 INFO L124 PetriNetUnfolderBase]: 2758/4630 cut-off events. [2023-08-04 04:24:18,042 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-04 04:24:18,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8741 conditions, 4630 events. 2758/4630 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 26474 event pairs, 743 based on Foata normal form. 0/3522 useless extension candidates. Maximal degree in co-relation 7963. Up to 3042 conditions per place. [2023-08-04 04:24:18,067 INFO L140 encePairwiseOnDemand]: 342/356 looper letters, 93 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2023-08-04 04:24:18,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 116 transitions, 456 flow [2023-08-04 04:24:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 04:24:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 04:24:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 920 transitions. [2023-08-04 04:24:18,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5168539325842697 [2023-08-04 04:24:18,069 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 920 transitions. [2023-08-04 04:24:18,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 920 transitions. [2023-08-04 04:24:18,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:18,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 920 transitions. [2023-08-04 04:24:18,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 184.0) internal successors, (920), 5 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:18,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:18,086 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:18,086 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 144 flow. Second operand 5 states and 920 transitions. [2023-08-04 04:24:18,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 116 transitions, 456 flow [2023-08-04 04:24:18,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 116 transitions, 454 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-04 04:24:18,088 INFO L231 Difference]: Finished difference. Result has 65 places, 69 transitions, 204 flow [2023-08-04 04:24:18,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=65, PETRI_TRANSITIONS=69} [2023-08-04 04:24:18,089 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 8 predicate places. [2023-08-04 04:24:18,090 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 69 transitions, 204 flow [2023-08-04 04:24:18,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:18,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:18,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 04:24:18,090 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:18,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:18,091 INFO L85 PathProgramCache]: Analyzing trace with hash -301997448, now seen corresponding path program 1 times [2023-08-04 04:24:18,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:18,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210716165] [2023-08-04 04:24:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:18,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:18,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:18,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210716165] [2023-08-04 04:24:18,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210716165] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:18,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:18,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:24:18,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572457094] [2023-08-04 04:24:18,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:18,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:24:18,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:18,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:24:18,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:24:18,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 356 [2023-08-04 04:24:18,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 69 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 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) [2023-08-04 04:24:18,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:18,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 356 [2023-08-04 04:24:18,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:18,667 INFO L124 PetriNetUnfolderBase]: 3515/5831 cut-off events. [2023-08-04 04:24:18,667 INFO L125 PetriNetUnfolderBase]: For 1526/1548 co-relation queries the response was YES. [2023-08-04 04:24:18,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12377 conditions, 5831 events. 3515/5831 cut-off events. For 1526/1548 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 34887 event pairs, 781 based on Foata normal form. 110/4904 useless extension candidates. Maximal degree in co-relation 7401. Up to 4339 conditions per place. [2023-08-04 04:24:18,709 INFO L140 encePairwiseOnDemand]: 351/356 looper letters, 72 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2023-08-04 04:24:18,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 435 flow [2023-08-04 04:24:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:24:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:24:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2023-08-04 04:24:18,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5308988764044944 [2023-08-04 04:24:18,711 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2023-08-04 04:24:18,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2023-08-04 04:24:18,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:18,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2023-08-04 04:24:18,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:18,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:18,714 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:18,714 INFO L175 Difference]: Start difference. First operand has 65 places, 69 transitions, 204 flow. Second operand 3 states and 567 transitions. [2023-08-04 04:24:18,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 435 flow [2023-08-04 04:24:18,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 435 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:24:18,716 INFO L231 Difference]: Finished difference. Result has 68 places, 71 transitions, 225 flow [2023-08-04 04:24:18,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=68, PETRI_TRANSITIONS=71} [2023-08-04 04:24:18,718 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2023-08-04 04:24:18,718 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 71 transitions, 225 flow [2023-08-04 04:24:18,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 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) [2023-08-04 04:24:18,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:18,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:18,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 04:24:18,719 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:18,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1685742521, now seen corresponding path program 1 times [2023-08-04 04:24:18,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:18,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998808724] [2023-08-04 04:24:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:18,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:18,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:18,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998808724] [2023-08-04 04:24:18,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998808724] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:18,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:18,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:24:18,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345220296] [2023-08-04 04:24:18,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:18,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:24:18,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:18,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:24:18,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:24:18,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 356 [2023-08-04 04:24:18,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:18,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:18,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 356 [2023-08-04 04:24:18,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:19,751 INFO L124 PetriNetUnfolderBase]: 5363/8687 cut-off events. [2023-08-04 04:24:19,751 INFO L125 PetriNetUnfolderBase]: For 2174/2208 co-relation queries the response was YES. [2023-08-04 04:24:19,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18940 conditions, 8687 events. 5363/8687 cut-off events. For 2174/2208 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 52820 event pairs, 1277 based on Foata normal form. 22/7080 useless extension candidates. Maximal degree in co-relation 13490. Up to 4600 conditions per place. [2023-08-04 04:24:19,873 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 144 selfloop transitions, 8 changer transitions 0/169 dead transitions. [2023-08-04 04:24:19,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 169 transitions, 810 flow [2023-08-04 04:24:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:24:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:24:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1096 transitions. [2023-08-04 04:24:19,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5131086142322098 [2023-08-04 04:24:19,875 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1096 transitions. [2023-08-04 04:24:19,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1096 transitions. [2023-08-04 04:24:19,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:19,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1096 transitions. [2023-08-04 04:24:19,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.66666666666666) internal successors, (1096), 6 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,879 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,879 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 225 flow. Second operand 6 states and 1096 transitions. [2023-08-04 04:24:19,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 169 transitions, 810 flow [2023-08-04 04:24:19,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 169 transitions, 806 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:24:19,883 INFO L231 Difference]: Finished difference. Result has 75 places, 76 transitions, 270 flow [2023-08-04 04:24:19,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=75, PETRI_TRANSITIONS=76} [2023-08-04 04:24:19,884 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 18 predicate places. [2023-08-04 04:24:19,884 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 76 transitions, 270 flow [2023-08-04 04:24:19,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:19,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:19,884 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] [2023-08-04 04:24:19,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 04:24:19,885 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:19,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash -374543834, now seen corresponding path program 1 times [2023-08-04 04:24:19,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:19,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696791710] [2023-08-04 04:24:19,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:19,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:19,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:19,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696791710] [2023-08-04 04:24:19,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696791710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:19,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:19,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:24:19,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948501678] [2023-08-04 04:24:19,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:19,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:24:19,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:19,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:24:19,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:24:20,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 356 [2023-08-04 04:24:20,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 76 transitions, 270 flow. Second operand has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:20,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:20,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 356 [2023-08-04 04:24:20,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:21,170 INFO L124 PetriNetUnfolderBase]: 8093/12957 cut-off events. [2023-08-04 04:24:21,171 INFO L125 PetriNetUnfolderBase]: For 3736/3766 co-relation queries the response was YES. [2023-08-04 04:24:21,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29482 conditions, 12957 events. 8093/12957 cut-off events. For 3736/3766 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 81396 event pairs, 1917 based on Foata normal form. 22/10538 useless extension candidates. Maximal degree in co-relation 21584. Up to 7261 conditions per place. [2023-08-04 04:24:21,230 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 156 selfloop transitions, 9 changer transitions 0/183 dead transitions. [2023-08-04 04:24:21,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 183 transitions, 964 flow [2023-08-04 04:24:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:24:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:24:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1093 transitions. [2023-08-04 04:24:21,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117041198501873 [2023-08-04 04:24:21,233 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1093 transitions. [2023-08-04 04:24:21,233 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1093 transitions. [2023-08-04 04:24:21,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:21,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1093 transitions. [2023-08-04 04:24:21,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.16666666666666) internal successors, (1093), 6 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:21,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:21,237 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:21,237 INFO L175 Difference]: Start difference. First operand has 75 places, 76 transitions, 270 flow. Second operand 6 states and 1093 transitions. [2023-08-04 04:24:21,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 183 transitions, 964 flow [2023-08-04 04:24:21,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 183 transitions, 954 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:24:21,244 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 316 flow [2023-08-04 04:24:21,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=316, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2023-08-04 04:24:21,245 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-04 04:24:21,245 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 316 flow [2023-08-04 04:24:21,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:21,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:21,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:21,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 04:24:21,246 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:21,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:21,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1284036845, now seen corresponding path program 1 times [2023-08-04 04:24:21,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:21,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984852058] [2023-08-04 04:24:21,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:21,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:21,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:21,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:21,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984852058] [2023-08-04 04:24:21,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984852058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:21,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:21,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-04 04:24:21,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571918120] [2023-08-04 04:24:21,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:21,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 04:24:21,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 04:24:21,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:24:21,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 356 [2023-08-04 04:24:21,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 316 flow. Second operand has 10 states, 10 states have (on average 143.8) internal successors, (1438), 10 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:21,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:21,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 356 [2023-08-04 04:24:21,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:24,803 INFO L124 PetriNetUnfolderBase]: 15364/24562 cut-off events. [2023-08-04 04:24:24,803 INFO L125 PetriNetUnfolderBase]: For 6462/6488 co-relation queries the response was YES. [2023-08-04 04:24:24,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56784 conditions, 24562 events. 15364/24562 cut-off events. For 6462/6488 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 171752 event pairs, 1952 based on Foata normal form. 26/20277 useless extension candidates. Maximal degree in co-relation 47014. Up to 10090 conditions per place. [2023-08-04 04:24:24,972 INFO L140 encePairwiseOnDemand]: 334/356 looper letters, 342 selfloop transitions, 71 changer transitions 0/430 dead transitions. [2023-08-04 04:24:24,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 430 transitions, 2249 flow [2023-08-04 04:24:24,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:24:24,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:24:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2508 transitions. [2023-08-04 04:24:24,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696629213483146 [2023-08-04 04:24:24,976 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2508 transitions. [2023-08-04 04:24:24,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2508 transitions. [2023-08-04 04:24:24,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:24,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2508 transitions. [2023-08-04 04:24:25,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 167.2) internal successors, (2508), 15 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:25,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:25,121 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:25,121 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 316 flow. Second operand 15 states and 2508 transitions. [2023-08-04 04:24:25,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 430 transitions, 2249 flow [2023-08-04 04:24:25,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 430 transitions, 2236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:24:25,141 INFO L231 Difference]: Finished difference. Result has 103 places, 158 transitions, 866 flow [2023-08-04 04:24:25,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=866, PETRI_PLACES=103, PETRI_TRANSITIONS=158} [2023-08-04 04:24:25,141 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 46 predicate places. [2023-08-04 04:24:25,142 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 158 transitions, 866 flow [2023-08-04 04:24:25,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 143.8) internal successors, (1438), 10 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:25,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:25,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:25,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 04:24:25,142 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:25,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:25,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1316323474, now seen corresponding path program 1 times [2023-08-04 04:24:25,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:25,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696608899] [2023-08-04 04:24:25,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:25,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:25,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:25,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696608899] [2023-08-04 04:24:25,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696608899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:24:25,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530380806] [2023-08-04 04:24:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:25,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:24:25,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:24:25,629 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) [2023-08-04 04:24:25,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 04:24:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:25,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-04 04:24:25,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:24:25,792 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 04:24:25,792 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-04 04:24:26,073 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 04:24:26,073 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 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-04 04:24:26,127 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 04:24:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:26,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:24:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:24:26,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530380806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:24:26,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:24:26,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-04 04:24:26,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879760384] [2023-08-04 04:24:26,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:24:26,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 04:24:26,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:26,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 04:24:26,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2023-08-04 04:24:27,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 356 [2023-08-04 04:24:27,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 158 transitions, 866 flow. Second operand has 24 states, 24 states have (on average 134.375) internal successors, (3225), 24 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:27,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:27,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 356 [2023-08-04 04:24:27,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:24:39,376 INFO L124 PetriNetUnfolderBase]: 46397/73530 cut-off events. [2023-08-04 04:24:39,376 INFO L125 PetriNetUnfolderBase]: For 175417/175471 co-relation queries the response was YES. [2023-08-04 04:24:39,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231751 conditions, 73530 events. 46397/73530 cut-off events. For 175417/175471 co-relation queries the response was YES. Maximal size of possible extension queue 1605. Compared 580839 event pairs, 3406 based on Foata normal form. 1070/70181 useless extension candidates. Maximal degree in co-relation 206631. Up to 13347 conditions per place. [2023-08-04 04:24:40,023 INFO L140 encePairwiseOnDemand]: 331/356 looper letters, 1423 selfloop transitions, 632 changer transitions 0/2072 dead transitions. [2023-08-04 04:24:40,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 2072 transitions, 13964 flow [2023-08-04 04:24:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-04 04:24:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-04 04:24:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 9957 transitions. [2023-08-04 04:24:40,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44395398608881753 [2023-08-04 04:24:40,035 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 9957 transitions. [2023-08-04 04:24:40,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 9957 transitions. [2023-08-04 04:24:40,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:24:40,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 9957 transitions. [2023-08-04 04:24:40,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 158.04761904761904) internal successors, (9957), 63 states have internal predecessors, (9957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:40,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 356.0) internal successors, (22784), 64 states have internal predecessors, (22784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:40,079 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 356.0) internal successors, (22784), 64 states have internal predecessors, (22784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:40,079 INFO L175 Difference]: Start difference. First operand has 103 places, 158 transitions, 866 flow. Second operand 63 states and 9957 transitions. [2023-08-04 04:24:40,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 2072 transitions, 13964 flow [2023-08-04 04:24:40,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 2072 transitions, 13942 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:24:40,575 INFO L231 Difference]: Finished difference. Result has 222 places, 892 transitions, 8011 flow [2023-08-04 04:24:40,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=8011, PETRI_PLACES=222, PETRI_TRANSITIONS=892} [2023-08-04 04:24:40,576 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 165 predicate places. [2023-08-04 04:24:40,576 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 892 transitions, 8011 flow [2023-08-04 04:24:40,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 134.375) internal successors, (3225), 24 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:40,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:24:40,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:24:40,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 04:24:40,782 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 [2023-08-04 04:24:40,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:24:40,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:24:40,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1203665611, now seen corresponding path program 1 times [2023-08-04 04:24:40,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:24:40,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092495971] [2023-08-04 04:24:40,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:24:40,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:24:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:24:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:24:41,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:24:41,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092495971] [2023-08-04 04:24:41,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092495971] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:24:41,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:24:41,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-04 04:24:41,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010185419] [2023-08-04 04:24:41,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:24:41,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-04 04:24:41,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:24:41,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-04 04:24:41,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:24:41,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 356 [2023-08-04 04:24:41,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 892 transitions, 8011 flow. Second operand has 10 states, 10 states have (on average 144.1) internal successors, (1441), 10 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:24:41,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:24:41,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 356 [2023-08-04 04:24:41,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:25:09,647 INFO L124 PetriNetUnfolderBase]: 72851/115667 cut-off events. [2023-08-04 04:25:09,647 INFO L125 PetriNetUnfolderBase]: For 2130478/2132879 co-relation queries the response was YES. [2023-08-04 04:25:11,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 563777 conditions, 115667 events. 72851/115667 cut-off events. For 2130478/2132879 co-relation queries the response was YES. Maximal size of possible extension queue 2500. Compared 971913 event pairs, 10899 based on Foata normal form. 1129/109572 useless extension candidates. Maximal degree in co-relation 521402. Up to 59684 conditions per place. [2023-08-04 04:25:12,394 INFO L140 encePairwiseOnDemand]: 334/356 looper letters, 2315 selfloop transitions, 615 changer transitions 0/2952 dead transitions. [2023-08-04 04:25:12,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 2952 transitions, 29711 flow [2023-08-04 04:25:12,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:25:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:25:12,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2492 transitions. [2023-08-04 04:25:12,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-04 04:25:12,398 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2492 transitions. [2023-08-04 04:25:12,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2492 transitions. [2023-08-04 04:25:12,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:25:12,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2492 transitions. [2023-08-04 04:25:12,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.13333333333333) internal successors, (2492), 15 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:12,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:12,407 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:12,407 INFO L175 Difference]: Start difference. First operand has 222 places, 892 transitions, 8011 flow. Second operand 15 states and 2492 transitions. [2023-08-04 04:25:12,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 2952 transitions, 29711 flow [2023-08-04 04:25:27,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 2952 transitions, 28799 flow, removed 456 selfloop flow, removed 0 redundant places. [2023-08-04 04:25:27,675 INFO L231 Difference]: Finished difference. Result has 245 places, 1538 transitions, 15380 flow [2023-08-04 04:25:27,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=7763, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=892, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15380, PETRI_PLACES=245, PETRI_TRANSITIONS=1538} [2023-08-04 04:25:27,676 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 188 predicate places. [2023-08-04 04:25:27,676 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 1538 transitions, 15380 flow [2023-08-04 04:25:27,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 144.1) internal successors, (1441), 10 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:27,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:25:27,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:25:27,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 04:25:27,677 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:25:27,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:25:27,677 INFO L85 PathProgramCache]: Analyzing trace with hash -181397599, now seen corresponding path program 1 times [2023-08-04 04:25:27,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:25:27,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460240930] [2023-08-04 04:25:27,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:25:27,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:25:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:25:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:25:28,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:25:28,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460240930] [2023-08-04 04:25:28,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460240930] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:25:28,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:25:28,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-04 04:25:28,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853192021] [2023-08-04 04:25:28,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:25:28,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 04:25:28,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:25:28,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 04:25:28,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-04 04:25:28,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 356 [2023-08-04 04:25:28,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 1538 transitions, 15380 flow. Second operand has 11 states, 11 states have (on average 143.9090909090909) internal successors, (1583), 11 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:25:28,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:25:28,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 356 [2023-08-04 04:25:28,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:26:05,050 INFO L124 PetriNetUnfolderBase]: 73579/116597 cut-off events. [2023-08-04 04:26:05,051 INFO L125 PetriNetUnfolderBase]: For 2464195/2464654 co-relation queries the response was YES. [2023-08-04 04:26:07,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 658293 conditions, 116597 events. 73579/116597 cut-off events. For 2464195/2464654 co-relation queries the response was YES. Maximal size of possible extension queue 2491. Compared 975979 event pairs, 10068 based on Foata normal form. 291/111149 useless extension candidates. Maximal degree in co-relation 600307. Up to 68065 conditions per place. [2023-08-04 04:26:08,169 INFO L140 encePairwiseOnDemand]: 336/356 looper letters, 1438 selfloop transitions, 600 changer transitions 0/2055 dead transitions. [2023-08-04 04:26:08,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 2055 transitions, 24994 flow [2023-08-04 04:26:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:26:08,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:26:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2503 transitions. [2023-08-04 04:26:08,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4687265917602996 [2023-08-04 04:26:08,173 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2503 transitions. [2023-08-04 04:26:08,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2503 transitions. [2023-08-04 04:26:08,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:26:08,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2503 transitions. [2023-08-04 04:26:08,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 166.86666666666667) internal successors, (2503), 15 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:08,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:08,180 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:08,180 INFO L175 Difference]: Start difference. First operand has 245 places, 1538 transitions, 15380 flow. Second operand 15 states and 2503 transitions. [2023-08-04 04:26:08,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 2055 transitions, 24994 flow [2023-08-04 04:26:39,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 2055 transitions, 24547 flow, removed 174 selfloop flow, removed 3 redundant places. [2023-08-04 04:26:39,337 INFO L231 Difference]: Finished difference. Result has 260 places, 1616 transitions, 17753 flow [2023-08-04 04:26:39,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=15105, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=530, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=17753, PETRI_PLACES=260, PETRI_TRANSITIONS=1616} [2023-08-04 04:26:39,339 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 203 predicate places. [2023-08-04 04:26:39,339 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 1616 transitions, 17753 flow [2023-08-04 04:26:39,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 143.9090909090909) internal successors, (1583), 11 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:39,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:26:39,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:26:39,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 04:26:39,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:26:39,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:26:39,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1437127472, now seen corresponding path program 1 times [2023-08-04 04:26:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:26:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220336656] [2023-08-04 04:26:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:26:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:26:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:26:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 04:26:39,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:26:39,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220336656] [2023-08-04 04:26:39,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220336656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:26:39,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:26:39,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-04 04:26:39,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289305203] [2023-08-04 04:26:39,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:26:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 04:26:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:26:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 04:26:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-08-04 04:26:40,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 356 [2023-08-04 04:26:40,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 1616 transitions, 17753 flow. Second operand has 11 states, 11 states have (on average 144.0) internal successors, (1584), 11 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:26:40,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:26:40,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 356 [2023-08-04 04:26:40,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:27:17,897 INFO L124 PetriNetUnfolderBase]: 75361/119699 cut-off events. [2023-08-04 04:27:17,898 INFO L125 PetriNetUnfolderBase]: For 2864195/2866794 co-relation queries the response was YES. [2023-08-04 04:27:20,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707068 conditions, 119699 events. 75361/119699 cut-off events. For 2864195/2866794 co-relation queries the response was YES. Maximal size of possible extension queue 2552. Compared 1010986 event pairs, 11587 based on Foata normal form. 132/113967 useless extension candidates. Maximal degree in co-relation 638005. Up to 62208 conditions per place. [2023-08-04 04:27:20,995 INFO L140 encePairwiseOnDemand]: 336/356 looper letters, 2404 selfloop transitions, 663 changer transitions 0/3089 dead transitions. [2023-08-04 04:27:20,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 3089 transitions, 37315 flow [2023-08-04 04:27:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:27:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:27:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2487 transitions. [2023-08-04 04:27:20,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4657303370786517 [2023-08-04 04:27:20,998 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2487 transitions. [2023-08-04 04:27:20,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2487 transitions. [2023-08-04 04:27:20,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:27:20,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2487 transitions. [2023-08-04 04:27:21,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 165.8) internal successors, (2487), 15 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:21,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:21,006 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 356.0) internal successors, (5696), 16 states have internal predecessors, (5696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:21,006 INFO L175 Difference]: Start difference. First operand has 260 places, 1616 transitions, 17753 flow. Second operand 15 states and 2487 transitions. [2023-08-04 04:27:21,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 3089 transitions, 37315 flow [2023-08-04 04:27:51,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 3089 transitions, 36539 flow, removed 72 selfloop flow, removed 8 redundant places. [2023-08-04 04:27:51,854 INFO L231 Difference]: Finished difference. Result has 270 places, 1672 transitions, 19772 flow [2023-08-04 04:27:51,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=17202, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=615, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=979, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=19772, PETRI_PLACES=270, PETRI_TRANSITIONS=1672} [2023-08-04 04:27:51,855 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 213 predicate places. [2023-08-04 04:27:51,855 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1672 transitions, 19772 flow [2023-08-04 04:27:51,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 144.0) internal successors, (1584), 11 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:51,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:27:51,855 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:27:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 04:27:51,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:27:51,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:27:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash -38758105, now seen corresponding path program 2 times [2023-08-04 04:27:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:27:51,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452239689] [2023-08-04 04:27:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:27:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:27:51,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:27:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:27:52,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:27:52,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452239689] [2023-08-04 04:27:52,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452239689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:27:52,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014886734] [2023-08-04 04:27:52,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 04:27:52,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:27:52,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:27:52,165 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) [2023-08-04 04:27:52,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 04:27:52,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 04:27:52,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 04:27:52,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-04 04:27:52,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:27:52,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 04:27:52,631 INFO L322 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2023-08-04 04:27:52,632 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 54 [2023-08-04 04:27:52,658 INFO L322 Elim1Store]: treesize reduction 30, result has 43.4 percent of original size [2023-08-04 04:27:52,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 81 [2023-08-04 04:27:52,667 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-08-04 04:27:52,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-08-04 04:27:52,709 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 8 treesize of output 7 [2023-08-04 04:27:52,738 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 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-04 04:27:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:27:52,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:27:52,943 INFO L322 Elim1Store]: treesize reduction 26, result has 65.3 percent of original size [2023-08-04 04:27:52,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 78 treesize of output 111 [2023-08-04 04:27:52,953 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 04:27:53,000 INFO L322 Elim1Store]: treesize reduction 49, result has 43.7 percent of original size [2023-08-04 04:27:53,001 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 83 treesize of output 137 [2023-08-04 04:27:53,020 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:27:53,020 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 1 case distinctions, treesize of input 9 treesize of output 8 [2023-08-04 04:27:53,096 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:27:53,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2023-08-04 04:27:53,114 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-04 04:27:53,144 INFO L322 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2023-08-04 04:27:53,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 69 [2023-08-04 04:27:53,155 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-04 04:27:53,171 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-04 04:27:53,172 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-08-04 04:27:53,207 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:27:53,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 32 [2023-08-04 04:27:53,288 INFO L322 Elim1Store]: treesize reduction 13, result has 69.0 percent of original size [2023-08-04 04:27:53,288 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 101 [2023-08-04 04:27:53,301 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:27:53,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 82 [2023-08-04 04:27:53,311 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:27:53,312 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 57 treesize of output 61 [2023-08-04 04:27:53,334 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:27:53,335 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 14 treesize of output 11 [2023-08-04 04:27:53,359 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-04 04:27:53,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-08-04 04:27:53,386 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 04:27:53,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2023-08-04 04:27:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:27:53,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014886734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:27:53,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:27:53,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-04 04:27:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578013818] [2023-08-04 04:27:53,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:27:53,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-04 04:27:53,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:27:53,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-04 04:27:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-08-04 04:27:54,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 356 [2023-08-04 04:27:54,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1672 transitions, 19772 flow. Second operand has 21 states, 21 states have (on average 147.0) internal successors, (3087), 21 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:27:54,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:27:54,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 356 [2023-08-04 04:27:54,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand