/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/increased_bounds/goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 04:32:29,960 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 04:32:30,032 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 04:32:30,037 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 04:32:30,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 04:32:30,038 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 04:32:30,039 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 04:32:30,060 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 04:32:30,061 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 04:32:30,061 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 04:32:30,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 04:32:30,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 04:32:30,062 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 04:32:30,063 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 04:32:30,063 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 04:32:30,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 04:32:30,063 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 04:32:30,064 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 04:32:30,064 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 04:32:30,064 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 04:32:30,064 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 04:32:30,070 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 04:32:30,070 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 04:32:30,070 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 04:32:30,071 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 04:32:30,071 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 04:32:30,071 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 04:32:30,071 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 04:32:30,071 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 04:32:30,072 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 04:32:30,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:32:30,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 04:32:30,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 04:32:30,072 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 04:32:30,073 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 04:32:30,073 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 04:32:30,073 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 04:32:30,073 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 04:32:30,073 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 04:32:30,074 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 04:32:30,074 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 04:32:30,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 04:32:30,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 04:32:30,327 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 04:32:30,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 04:32:30,330 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 04:32:30,330 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 04:32:30,331 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i [2023-08-04 04:32:31,544 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 04:32:31,794 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 04:32:31,794 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i [2023-08-04 04:32:31,806 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1577541c6/31a2fac155ba4ae0969ed7bb6f878573/FLAGd75a8abf7 [2023-08-04 04:32:31,819 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1577541c6/31a2fac155ba4ae0969ed7bb6f878573 [2023-08-04 04:32:31,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 04:32:31,824 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 04:32:31,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 04:32:31,825 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 04:32:31,827 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 04:32:31,828 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:32:31" (1/1) ... [2023-08-04 04:32:31,829 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d3632c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:31, skipping insertion in model container [2023-08-04 04:32:31,829 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 04:32:31" (1/1) ... [2023-08-04 04:32:31,861 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 04:32:31,989 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i[1103,1116] [2023-08-04 04:32:32,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:32:32,116 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 04:32:32,128 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i[1103,1116] [2023-08-04 04:32:32,159 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-04 04:32:32,160 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-04 04:32:32,182 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 04:32:32,222 INFO L206 MainTranslator]: Completed translation [2023-08-04 04:32:32,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32 WrapperNode [2023-08-04 04:32:32,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 04:32:32,224 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 04:32:32,224 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 04:32:32,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 04:32:32,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,266 INFO L138 Inliner]: procedures = 162, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 93 [2023-08-04 04:32:32,266 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 04:32:32,267 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 04:32:32,267 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 04:32:32,267 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 04:32:32,278 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,279 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,281 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,281 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,290 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,292 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,293 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,295 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 04:32:32,296 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 04:32:32,296 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 04:32:32,296 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 04:32:32,297 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (1/1) ... [2023-08-04 04:32:32,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 04:32:32,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:32,467 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 04:32:32,473 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 04:32:32,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 04:32:32,496 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-04 04:32:32,496 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-04 04:32:32,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 04:32:32,496 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 04:32:32,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 04:32:32,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 04:32:32,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 04:32:32,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 04:32:32,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 04:32:32,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 04:32:32,498 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 04:32:32,597 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 04:32:32,599 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 04:32:32,787 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 04:32:32,794 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 04:32:32,794 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-04 04:32:32,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:32:32 BoogieIcfgContainer [2023-08-04 04:32:32,796 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 04:32:32,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 04:32:32,799 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 04:32:32,801 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 04:32:32,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 04:32:31" (1/3) ... [2023-08-04 04:32:32,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4a3662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:32:32, skipping insertion in model container [2023-08-04 04:32:32,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 04:32:32" (2/3) ... [2023-08-04 04:32:32,802 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e4a3662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 04:32:32, skipping insertion in model container [2023-08-04 04:32:32,802 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 04:32:32" (3/3) ... [2023-08-04 04:32:32,804 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i [2023-08-04 04:32:32,810 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 04:32:32,819 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 04:32:32,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-04 04:32:32,819 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 04:32:32,877 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-04 04:32:32,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 115 transitions, 238 flow [2023-08-04 04:32:32,961 INFO L124 PetriNetUnfolderBase]: 11/167 cut-off events. [2023-08-04 04:32:32,962 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:32:32,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 11/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 279 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 85. Up to 4 conditions per place. [2023-08-04 04:32:32,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 115 transitions, 238 flow [2023-08-04 04:32:32,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 93 transitions, 189 flow [2023-08-04 04:32:32,973 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:32:32,980 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 93 transitions, 189 flow [2023-08-04 04:32:32,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 93 transitions, 189 flow [2023-08-04 04:32:32,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 189 flow [2023-08-04 04:32:33,009 INFO L124 PetriNetUnfolderBase]: 6/129 cut-off events. [2023-08-04 04:32:33,009 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:32:33,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 129 events. 6/129 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 211 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-04 04:32:33,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 1476 [2023-08-04 04:32:35,810 INFO L134 LiptonReduction]: Checked pairs total: 3394 [2023-08-04 04:32:35,810 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-04 04:32:35,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:32:35,828 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;@1ab5b429, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:32:35,828 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 04:32:35,831 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:32:35,831 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2023-08-04 04:32:35,831 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:32:35,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:35,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 04:32:35,833 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:35,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:35,837 INFO L85 PathProgramCache]: Analyzing trace with hash 12029839, now seen corresponding path program 1 times [2023-08-04 04:32:35,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:35,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209782801] [2023-08-04 04:32:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:35,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:36,074 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 04:32:36,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:36,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209782801] [2023-08-04 04:32:36,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209782801] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:36,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:36,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:32:36,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043237394] [2023-08-04 04:32:36,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:36,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:32:36,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:36,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:32:36,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:32:36,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 194 [2023-08-04 04:32:36,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:32:36,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:36,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 194 [2023-08-04 04:32:36,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:36,198 INFO L124 PetriNetUnfolderBase]: 77/183 cut-off events. [2023-08-04 04:32:36,199 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:32:36,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 183 events. 77/183 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 678 event pairs, 10 based on Foata normal form. 0/159 useless extension candidates. Maximal degree in co-relation 352. Up to 166 conditions per place. [2023-08-04 04:32:36,201 INFO L140 encePairwiseOnDemand]: 191/194 looper letters, 25 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2023-08-04 04:32:36,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 119 flow [2023-08-04 04:32:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:32:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:32:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-04 04:32:36,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570446735395189 [2023-08-04 04:32:36,214 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-04 04:32:36,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-04 04:32:36,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:36,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-04 04:32:36,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states 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 04:32:36,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states 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 04:32:36,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states 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 04:32:36,227 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 47 flow. Second operand 3 states and 332 transitions. [2023-08-04 04:32:36,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 119 flow [2023-08-04 04:32:36,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 30 transitions, 119 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:32:36,231 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 55 flow [2023-08-04 04:32:36,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-08-04 04:32:36,235 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-04 04:32:36,236 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 55 flow [2023-08-04 04:32:36,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:32:36,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:36,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:36,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 04:32:36,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:36,237 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:36,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2069249551, now seen corresponding path program 1 times [2023-08-04 04:32:36,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:36,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856412626] [2023-08-04 04:32:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:36,318 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 04:32:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856412626] [2023-08-04 04:32:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856412626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545682019] [2023-08-04 04:32:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:36,323 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 04:32:36,331 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 04:32:36,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:36,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:32:36,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:36,466 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 04:32:36,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:32:36,483 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 04:32:36,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545682019] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:32:36,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:32:36,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:32:36,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401498636] [2023-08-04 04:32:36,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:32:36,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:32:36,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:32:36,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:32:36,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 194 [2023-08-04 04:32:36,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 04:32:36,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:36,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 194 [2023-08-04 04:32:36,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:36,550 INFO L124 PetriNetUnfolderBase]: 14/41 cut-off events. [2023-08-04 04:32:36,550 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 04:32:36,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 41 events. 14/41 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 8/49 useless extension candidates. Maximal degree in co-relation 91. Up to 30 conditions per place. [2023-08-04 04:32:36,552 INFO L140 encePairwiseOnDemand]: 191/194 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-04 04:32:36,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 87 flow [2023-08-04 04:32:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:32:36,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:32:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 420 transitions. [2023-08-04 04:32:36,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412371134020618 [2023-08-04 04:32:36,561 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 420 transitions. [2023-08-04 04:32:36,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 420 transitions. [2023-08-04 04:32:36,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:36,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 420 transitions. [2023-08-04 04:32:36,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:32:36,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 04:32:36,572 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 194.0) internal successors, (970), 5 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 04:32:36,572 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 55 flow. Second operand 4 states and 420 transitions. [2023-08-04 04:32:36,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 87 flow [2023-08-04 04:32:36,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 20 transitions, 81 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:32:36,573 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 04:32:36,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=27, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 04:32:36,574 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -7 predicate places. [2023-08-04 04:32:36,574 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 04:32:36,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.2) internal successors, (511), 5 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 04:32:36,577 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 04:32:36,577 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 04:32:36,577 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 04:32:36,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 04:32:36,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:36,786 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 04:32:36,788 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 04:32:36,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 115 transitions, 238 flow [2023-08-04 04:32:36,808 INFO L124 PetriNetUnfolderBase]: 11/167 cut-off events. [2023-08-04 04:32:36,808 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:32:36,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 167 events. 11/167 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 279 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 85. Up to 4 conditions per place. [2023-08-04 04:32:36,809 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 115 transitions, 238 flow [2023-08-04 04:32:36,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 62 transitions, 129 flow [2023-08-04 04:32:36,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:32:36,810 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 62 transitions, 129 flow [2023-08-04 04:32:36,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 62 transitions, 129 flow [2023-08-04 04:32:36,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 62 transitions, 129 flow [2023-08-04 04:32:36,816 INFO L124 PetriNetUnfolderBase]: 0/66 cut-off events. [2023-08-04 04:32:36,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:32:36,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 66 events. 0/66 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 20 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2023-08-04 04:32:36,818 INFO L119 LiptonReduction]: Number of co-enabled transitions 360 [2023-08-04 04:32:39,614 INFO L134 LiptonReduction]: Checked pairs total: 259 [2023-08-04 04:32:39,614 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-04 04:32:39,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:32:39,617 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;@1ab5b429, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:32:39,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:32:39,619 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:32:39,619 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-04 04:32:39,619 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:32:39,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:39,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 04:32:39,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:32:39,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash 13779471, now seen corresponding path program 1 times [2023-08-04 04:32:39,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:39,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714620155] [2023-08-04 04:32:39,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:39,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:32:39,668 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 04:32:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 04:32:39,694 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 04:32:39,694 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 04:32:39,694 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:32:39,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 04:32:39,695 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:32:39,695 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-04 04:32:39,696 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 04:32:39,696 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 04:32:39,710 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-04 04:32:39,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 288 flow [2023-08-04 04:32:39,733 INFO L124 PetriNetUnfolderBase]: 19/263 cut-off events. [2023-08-04 04:32:39,734 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 04:32:39,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 263 events. 19/263 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 662 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-04 04:32:39,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 135 transitions, 288 flow [2023-08-04 04:32:39,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 112 transitions, 232 flow [2023-08-04 04:32:39,736 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:32:39,736 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 112 transitions, 232 flow [2023-08-04 04:32:39,736 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 112 transitions, 232 flow [2023-08-04 04:32:39,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 112 transitions, 232 flow [2023-08-04 04:32:39,749 INFO L124 PetriNetUnfolderBase]: 9/189 cut-off events. [2023-08-04 04:32:39,750 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 04:32:39,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 189 events. 9/189 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 441 event pairs, 0 based on Foata normal form. 0/171 useless extension candidates. Maximal degree in co-relation 131. Up to 6 conditions per place. [2023-08-04 04:32:39,753 INFO L119 LiptonReduction]: Number of co-enabled transitions 3636 [2023-08-04 04:32:42,041 INFO L134 LiptonReduction]: Checked pairs total: 11328 [2023-08-04 04:32:42,041 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-04 04:32:42,043 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 04:32:42,044 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;@1ab5b429, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:32:42,044 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 04:32:42,046 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:32:42,046 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-04 04:32:42,046 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 04:32:42,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:42,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 04:32:42,046 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:42,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:42,047 INFO L85 PathProgramCache]: Analyzing trace with hash 21294609, now seen corresponding path program 1 times [2023-08-04 04:32:42,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:42,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131692586] [2023-08-04 04:32:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:42,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:42,078 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 04:32:42,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:42,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131692586] [2023-08-04 04:32:42,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131692586] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:42,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:42,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:32:42,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781948923] [2023-08-04 04:32:42,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:42,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:32:42,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:42,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:32:42,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:32:42,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 221 [2023-08-04 04:32:42,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states 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 04:32:42,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:42,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 221 [2023-08-04 04:32:42,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:42,323 INFO L124 PetriNetUnfolderBase]: 1365/2571 cut-off events. [2023-08-04 04:32:42,323 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 04:32:42,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4832 conditions, 2571 events. 1365/2571 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15972 event pairs, 616 based on Foata normal form. 0/2347 useless extension candidates. Maximal degree in co-relation 578. Up to 2222 conditions per place. [2023-08-04 04:32:42,336 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 04:32:42,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 172 flow [2023-08-04 04:32:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:32:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:32:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-04 04:32:42,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972850678733032 [2023-08-04 04:32:42,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-04 04:32:42,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-04 04:32:42,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:42,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-04 04:32:42,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states 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 04:32:42,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 04:32:42,345 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 04:32:42,345 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 3 states and 396 transitions. [2023-08-04 04:32:42,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 172 flow [2023-08-04 04:32:42,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:32:42,347 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 92 flow [2023-08-04 04:32:42,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-04 04:32:42,349 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-04 04:32:42,350 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 92 flow [2023-08-04 04:32:42,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states 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 04:32:42,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:42,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:42,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 04:32:42,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:42,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:42,351 INFO L85 PathProgramCache]: Analyzing trace with hash 922906321, now seen corresponding path program 1 times [2023-08-04 04:32:42,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:42,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642613348] [2023-08-04 04:32:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:42,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:42,432 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 04:32:42,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:42,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642613348] [2023-08-04 04:32:42,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642613348] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:42,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652288975] [2023-08-04 04:32:42,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:42,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:42,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:42,437 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 04:32:42,463 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 04:32:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:42,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 04:32:42,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:42,518 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 04:32:42,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:32:42,534 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 04:32:42,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652288975] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:32:42,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:32:42,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 04:32:42,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617452208] [2023-08-04 04:32:42,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:32:42,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:32:42,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:42,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:32:42,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:32:42,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 221 [2023-08-04 04:32:42,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 04:32:42,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:42,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 221 [2023-08-04 04:32:42,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:42,757 INFO L124 PetriNetUnfolderBase]: 1302/2284 cut-off events. [2023-08-04 04:32:42,757 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-08-04 04:32:42,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4557 conditions, 2284 events. 1302/2284 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13113 event pairs, 248 based on Foata normal form. 8/2164 useless extension candidates. Maximal degree in co-relation 587. Up to 1761 conditions per place. [2023-08-04 04:32:42,767 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 48 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-04 04:32:42,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 242 flow [2023-08-04 04:32:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:32:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:32:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 525 transitions. [2023-08-04 04:32:42,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938914027149321 [2023-08-04 04:32:42,769 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 525 transitions. [2023-08-04 04:32:42,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 525 transitions. [2023-08-04 04:32:42,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:42,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 525 transitions. [2023-08-04 04:32:42,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:32:42,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:42,773 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:42,773 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 92 flow. Second operand 4 states and 525 transitions. [2023-08-04 04:32:42,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 242 flow [2023-08-04 04:32:42,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:32:42,775 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 104 flow [2023-08-04 04:32:42,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=48, PETRI_TRANSITIONS=37} [2023-08-04 04:32:42,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-04 04:32:42,776 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 104 flow [2023-08-04 04:32:42,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.2) internal successors, (601), 5 states have internal predecessors, (601), 0 states have call successors, (0), 0 states 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 04:32:42,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:42,777 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:42,789 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 04:32:42,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:42,982 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:42,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1581672496, now seen corresponding path program 1 times [2023-08-04 04:32:42,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:42,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230163527] [2023-08-04 04:32:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:42,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:43,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230163527] [2023-08-04 04:32:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230163527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:43,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 04:32:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223415781] [2023-08-04 04:32:43,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:43,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:32:43,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:32:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:32:43,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 221 [2023-08-04 04:32:43,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 37 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 04:32:43,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:43,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 221 [2023-08-04 04:32:43,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:43,267 INFO L124 PetriNetUnfolderBase]: 1318/2500 cut-off events. [2023-08-04 04:32:43,267 INFO L125 PetriNetUnfolderBase]: For 723/723 co-relation queries the response was YES. [2023-08-04 04:32:43,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5050 conditions, 2500 events. 1318/2500 cut-off events. For 723/723 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 15161 event pairs, 458 based on Foata normal form. 0/2353 useless extension candidates. Maximal degree in co-relation 3245. Up to 1716 conditions per place. [2023-08-04 04:32:43,282 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 47 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-04 04:32:43,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 266 flow [2023-08-04 04:32:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:32:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:32:43,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-04 04:32:43,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2023-08-04 04:32:43,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-04 04:32:43,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-04 04:32:43,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:43,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-04 04:32:43,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:32:43,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 04:32:43,288 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 04:32:43,288 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 104 flow. Second operand 3 states and 403 transitions. [2023-08-04 04:32:43,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 266 flow [2023-08-04 04:32:43,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 254 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 04:32:43,290 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 116 flow [2023-08-04 04:32:43,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-08-04 04:32:43,291 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-04 04:32:43,291 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 116 flow [2023-08-04 04:32:43,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states 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 04:32:43,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:43,292 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:43,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 04:32:43,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:43,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash -431172675, now seen corresponding path program 1 times [2023-08-04 04:32:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:43,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582645962] [2023-08-04 04:32:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:43,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:43,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:43,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582645962] [2023-08-04 04:32:43,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582645962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:43,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:43,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 04:32:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210588016] [2023-08-04 04:32:43,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:43,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:32:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:32:43,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 04:32:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 221 [2023-08-04 04:32:43,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 39 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 04:32:43,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:43,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 221 [2023-08-04 04:32:43,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:43,720 INFO L124 PetriNetUnfolderBase]: 1400/2630 cut-off events. [2023-08-04 04:32:43,721 INFO L125 PetriNetUnfolderBase]: For 655/655 co-relation queries the response was YES. [2023-08-04 04:32:43,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5512 conditions, 2630 events. 1400/2630 cut-off events. For 655/655 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 16049 event pairs, 421 based on Foata normal form. 0/2564 useless extension candidates. Maximal degree in co-relation 3683. Up to 1312 conditions per place. [2023-08-04 04:32:43,735 INFO L140 encePairwiseOnDemand]: 211/221 looper letters, 68 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2023-08-04 04:32:43,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 89 transitions, 411 flow [2023-08-04 04:32:43,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 04:32:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 04:32:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 610 transitions. [2023-08-04 04:32:43,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520361990950227 [2023-08-04 04:32:43,738 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 610 transitions. [2023-08-04 04:32:43,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 610 transitions. [2023-08-04 04:32:43,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:43,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 610 transitions. [2023-08-04 04:32:43,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states 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 04:32:43,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states 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 04:32:43,742 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 221.0) internal successors, (1326), 6 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states 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 04:32:43,742 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 116 flow. Second operand 5 states and 610 transitions. [2023-08-04 04:32:43,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 89 transitions, 411 flow [2023-08-04 04:32:43,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:32:43,745 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 211 flow [2023-08-04 04:32:43,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2023-08-04 04:32:43,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-04 04:32:43,746 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 211 flow [2023-08-04 04:32:43,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states 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 04:32:43,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:43,747 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:43,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 04:32:43,747 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:43,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1559610050, now seen corresponding path program 1 times [2023-08-04 04:32:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:43,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493858995] [2023-08-04 04:32:43,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:43,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:43,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:43,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493858995] [2023-08-04 04:32:43,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493858995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:43,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134485266] [2023-08-04 04:32:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:43,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:43,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:43,819 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 04:32:43,829 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 04:32:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:43,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 04:32:43,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:43,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:32:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:43,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134485266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:32:43,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:32:43,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-04 04:32:43,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870260705] [2023-08-04 04:32:43,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:32:43,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:32:43,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:32:43,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:32:44,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 221 [2023-08-04 04:32:44,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 states 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 04:32:44,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:44,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 221 [2023-08-04 04:32:44,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:44,395 INFO L124 PetriNetUnfolderBase]: 1762/3305 cut-off events. [2023-08-04 04:32:44,395 INFO L125 PetriNetUnfolderBase]: For 2298/2298 co-relation queries the response was YES. [2023-08-04 04:32:44,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8248 conditions, 3305 events. 1762/3305 cut-off events. For 2298/2298 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 21783 event pairs, 392 based on Foata normal form. 24/3301 useless extension candidates. Maximal degree in co-relation 6797. Up to 1607 conditions per place. [2023-08-04 04:32:44,416 INFO L140 encePairwiseOnDemand]: 212/221 looper letters, 117 selfloop transitions, 22 changer transitions 0/146 dead transitions. [2023-08-04 04:32:44,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 146 transitions, 886 flow [2023-08-04 04:32:44,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 04:32:44,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 04:32:44,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 933 transitions. [2023-08-04 04:32:44,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031027795733678 [2023-08-04 04:32:44,419 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 933 transitions. [2023-08-04 04:32:44,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 933 transitions. [2023-08-04 04:32:44,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:44,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 933 transitions. [2023-08-04 04:32:44,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 133.28571428571428) internal successors, (933), 7 states have internal predecessors, (933), 0 states have call successors, (0), 0 states 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 04:32:44,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 221.0) internal successors, (1768), 8 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 04:32:44,424 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 221.0) internal successors, (1768), 8 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 04:32:44,424 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 211 flow. Second operand 7 states and 933 transitions. [2023-08-04 04:32:44,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 146 transitions, 886 flow [2023-08-04 04:32:44,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 146 transitions, 886 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:32:44,432 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 400 flow [2023-08-04 04:32:44,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=400, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2023-08-04 04:32:44,432 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2023-08-04 04:32:44,432 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 400 flow [2023-08-04 04:32:44,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.71428571428571) internal successors, (838), 7 states have internal predecessors, (838), 0 states have call successors, (0), 0 states 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 04:32:44,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:44,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:44,441 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 04:32:44,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:44,639 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:44,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash 984092261, now seen corresponding path program 1 times [2023-08-04 04:32:44,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:44,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069312810] [2023-08-04 04:32:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:44,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:44,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:44,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:44,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069312810] [2023-08-04 04:32:44,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069312810] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:44,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:44,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 04:32:44,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551779724] [2023-08-04 04:32:44,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:44,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:32:44,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:44,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:32:44,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:32:44,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 221 [2023-08-04 04:32:44,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 400 flow. Second operand has 5 states, 5 states have (on average 118.4) internal successors, (592), 5 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:32:44,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:44,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 221 [2023-08-04 04:32:44,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:45,172 INFO L124 PetriNetUnfolderBase]: 2012/3719 cut-off events. [2023-08-04 04:32:45,172 INFO L125 PetriNetUnfolderBase]: For 5340/5340 co-relation queries the response was YES. [2023-08-04 04:32:45,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11101 conditions, 3719 events. 2012/3719 cut-off events. For 5340/5340 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24981 event pairs, 679 based on Foata normal form. 20/3702 useless extension candidates. Maximal degree in co-relation 7969. Up to 2244 conditions per place. [2023-08-04 04:32:45,204 INFO L140 encePairwiseOnDemand]: 213/221 looper letters, 106 selfloop transitions, 27 changer transitions 0/140 dead transitions. [2023-08-04 04:32:45,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 140 transitions, 1019 flow [2023-08-04 04:32:45,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 04:32:45,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 04:32:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 914 transitions. [2023-08-04 04:32:45,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5908209437621202 [2023-08-04 04:32:45,207 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 914 transitions. [2023-08-04 04:32:45,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 914 transitions. [2023-08-04 04:32:45,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:45,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 914 transitions. [2023-08-04 04:32:45,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 130.57142857142858) internal successors, (914), 7 states have internal predecessors, (914), 0 states have call successors, (0), 0 states 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 04:32:45,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 221.0) internal successors, (1768), 8 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 04:32:45,212 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 221.0) internal successors, (1768), 8 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 04:32:45,212 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 400 flow. Second operand 7 states and 914 transitions. [2023-08-04 04:32:45,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 140 transitions, 1019 flow [2023-08-04 04:32:45,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 140 transitions, 1019 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 04:32:45,231 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 623 flow [2023-08-04 04:32:45,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=623, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2023-08-04 04:32:45,232 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2023-08-04 04:32:45,232 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 623 flow [2023-08-04 04:32:45,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.4) internal successors, (592), 5 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:32:45,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:45,232 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:45,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 04:32:45,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:45,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:45,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1183926275, now seen corresponding path program 1 times [2023-08-04 04:32:45,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:45,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055551640] [2023-08-04 04:32:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:45,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055551640] [2023-08-04 04:32:45,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055551640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:45,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:45,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 04:32:45,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934410441] [2023-08-04 04:32:45,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:45,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 04:32:45,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 04:32:45,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 04:32:45,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 221 [2023-08-04 04:32:45,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 623 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 04:32:45,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:45,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 221 [2023-08-04 04:32:45,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:45,687 INFO L124 PetriNetUnfolderBase]: 1980/3699 cut-off events. [2023-08-04 04:32:45,687 INFO L125 PetriNetUnfolderBase]: For 7567/7567 co-relation queries the response was YES. [2023-08-04 04:32:45,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11826 conditions, 3699 events. 1980/3699 cut-off events. For 7567/7567 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 25010 event pairs, 874 based on Foata normal form. 16/3678 useless extension candidates. Maximal degree in co-relation 8590. Up to 2881 conditions per place. [2023-08-04 04:32:45,707 INFO L140 encePairwiseOnDemand]: 217/221 looper letters, 67 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2023-08-04 04:32:45,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 83 transitions, 706 flow [2023-08-04 04:32:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 04:32:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 04:32:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 401 transitions. [2023-08-04 04:32:45,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048265460030166 [2023-08-04 04:32:45,709 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 401 transitions. [2023-08-04 04:32:45,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 401 transitions. [2023-08-04 04:32:45,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:45,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 401 transitions. [2023-08-04 04:32:45,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.66666666666666) internal successors, (401), 3 states have internal predecessors, (401), 0 states have call successors, (0), 0 states 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 04:32:45,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 04:32:45,713 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states 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 04:32:45,714 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 623 flow. Second operand 3 states and 401 transitions. [2023-08-04 04:32:45,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 83 transitions, 706 flow [2023-08-04 04:32:45,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 83 transitions, 672 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-04 04:32:45,756 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 493 flow [2023-08-04 04:32:45,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=493, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2023-08-04 04:32:45,757 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2023-08-04 04:32:45,757 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 493 flow [2023-08-04 04:32:45,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states 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 04:32:45,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:45,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:45,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 04:32:45,758 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:45,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:45,758 INFO L85 PathProgramCache]: Analyzing trace with hash 159607057, now seen corresponding path program 1 times [2023-08-04 04:32:45,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:45,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598466970] [2023-08-04 04:32:45,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:45,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:45,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:45,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:45,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598466970] [2023-08-04 04:32:45,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598466970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:45,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133024144] [2023-08-04 04:32:45,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:45,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:45,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:45,865 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 04:32:45,892 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 04:32:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:45,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 04:32:45,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:46,015 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 04:32:46,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 04:32:46,067 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 04:32:46,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:46,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:32:46,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133024144] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:46,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:32:46,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-04 04:32:46,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368814910] [2023-08-04 04:32:46,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:46,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:32:46,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:46,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:32:46,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-04 04:32:46,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 221 [2023-08-04 04:32:46,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 493 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 04:32:46,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:46,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 221 [2023-08-04 04:32:46,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:46,391 INFO L124 PetriNetUnfolderBase]: 773/1606 cut-off events. [2023-08-04 04:32:46,391 INFO L125 PetriNetUnfolderBase]: For 2296/2300 co-relation queries the response was YES. [2023-08-04 04:32:46,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 1606 events. 773/1606 cut-off events. For 2296/2300 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9099 event pairs, 304 based on Foata normal form. 342/1945 useless extension candidates. Maximal degree in co-relation 4567. Up to 902 conditions per place. [2023-08-04 04:32:46,400 INFO L140 encePairwiseOnDemand]: 207/221 looper letters, 59 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2023-08-04 04:32:46,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 589 flow [2023-08-04 04:32:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:32:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:32:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-08-04 04:32:46,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497737556561086 [2023-08-04 04:32:46,402 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-08-04 04:32:46,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-08-04 04:32:46,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:46,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-08-04 04:32:46,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states 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 04:32:46,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:46,407 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:46,407 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 493 flow. Second operand 4 states and 486 transitions. [2023-08-04 04:32:46,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 589 flow [2023-08-04 04:32:46,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 81 transitions, 555 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-04 04:32:46,416 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 366 flow [2023-08-04 04:32:46,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=366, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2023-08-04 04:32:46,417 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2023-08-04 04:32:46,417 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 366 flow [2023-08-04 04:32:46,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states 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 04:32:46,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:46,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:46,425 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 04:32:46,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:46,623 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:46,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:46,623 INFO L85 PathProgramCache]: Analyzing trace with hash -143446767, now seen corresponding path program 1 times [2023-08-04 04:32:46,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:46,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276154602] [2023-08-04 04:32:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:46,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:46,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:46,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:46,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276154602] [2023-08-04 04:32:46,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276154602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:46,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913137474] [2023-08-04 04:32:46,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:46,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:46,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:46,714 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 04:32:46,716 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 04:32:46,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:46,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 04:32:46,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:46,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:32:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:46,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913137474] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:32:46,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:32:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 04:32:46,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900679279] [2023-08-04 04:32:46,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:32:46,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:32:46,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:46,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:32:46,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:32:46,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 221 [2023-08-04 04:32:46,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 366 flow. Second operand has 7 states, 7 states have (on average 106.57142857142857) internal successors, (746), 7 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 04:32:46,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:46,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 221 [2023-08-04 04:32:46,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:47,284 INFO L124 PetriNetUnfolderBase]: 840/1851 cut-off events. [2023-08-04 04:32:47,285 INFO L125 PetriNetUnfolderBase]: For 2576/2579 co-relation queries the response was YES. [2023-08-04 04:32:47,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6096 conditions, 1851 events. 840/1851 cut-off events. For 2576/2579 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 11262 event pairs, 284 based on Foata normal form. 5/1854 useless extension candidates. Maximal degree in co-relation 5253. Up to 732 conditions per place. [2023-08-04 04:32:47,293 INFO L140 encePairwiseOnDemand]: 209/221 looper letters, 132 selfloop transitions, 29 changer transitions 0/171 dead transitions. [2023-08-04 04:32:47,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 171 transitions, 1205 flow [2023-08-04 04:32:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 04:32:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 04:32:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1381 transitions. [2023-08-04 04:32:47,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.520739064856712 [2023-08-04 04:32:47,299 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1381 transitions. [2023-08-04 04:32:47,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1381 transitions. [2023-08-04 04:32:47,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:47,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1381 transitions. [2023-08-04 04:32:47,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.08333333333333) internal successors, (1381), 12 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states 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 04:32:47,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 221.0) internal successors, (2873), 13 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states 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 04:32:47,308 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 221.0) internal successors, (2873), 13 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states 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 04:32:47,308 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 366 flow. Second operand 12 states and 1381 transitions. [2023-08-04 04:32:47,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 171 transitions, 1205 flow [2023-08-04 04:32:47,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 171 transitions, 1204 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:32:47,317 INFO L231 Difference]: Finished difference. Result has 84 places, 73 transitions, 551 flow [2023-08-04 04:32:47,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=551, PETRI_PLACES=84, PETRI_TRANSITIONS=73} [2023-08-04 04:32:47,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2023-08-04 04:32:47,318 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 73 transitions, 551 flow [2023-08-04 04:32:47,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.57142857142857) internal successors, (746), 7 states have internal predecessors, (746), 0 states have call successors, (0), 0 states 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 04:32:47,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:47,319 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:47,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 04:32:47,524 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,SelfDestructingSolverStorable11 [2023-08-04 04:32:47,524 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:47,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:47,525 INFO L85 PathProgramCache]: Analyzing trace with hash 71446163, now seen corresponding path program 1 times [2023-08-04 04:32:47,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:47,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824879008] [2023-08-04 04:32:47,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:47,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:47,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:47,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:47,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824879008] [2023-08-04 04:32:47,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824879008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:47,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:47,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:32:47,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236846310] [2023-08-04 04:32:47,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:47,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:32:47,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:32:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:32:47,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 221 [2023-08-04 04:32:47,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 73 transitions, 551 flow. Second operand has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 04:32:47,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:47,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 221 [2023-08-04 04:32:47,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:47,963 INFO L124 PetriNetUnfolderBase]: 833/1851 cut-off events. [2023-08-04 04:32:47,963 INFO L125 PetriNetUnfolderBase]: For 4305/4310 co-relation queries the response was YES. [2023-08-04 04:32:47,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6665 conditions, 1851 events. 833/1851 cut-off events. For 4305/4310 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 11246 event pairs, 282 based on Foata normal form. 6/1856 useless extension candidates. Maximal degree in co-relation 5749. Up to 767 conditions per place. [2023-08-04 04:32:47,974 INFO L140 encePairwiseOnDemand]: 210/221 looper letters, 102 selfloop transitions, 30 changer transitions 0/142 dead transitions. [2023-08-04 04:32:47,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 142 transitions, 1151 flow [2023-08-04 04:32:47,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 04:32:47,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 04:32:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1039 transitions. [2023-08-04 04:32:47,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223730517848165 [2023-08-04 04:32:47,977 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1039 transitions. [2023-08-04 04:32:47,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1039 transitions. [2023-08-04 04:32:47,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:47,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1039 transitions. [2023-08-04 04:32:47,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.44444444444444) internal successors, (1039), 9 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states 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 04:32:47,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 04:32:47,984 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 04:32:47,984 INFO L175 Difference]: Start difference. First operand has 84 places, 73 transitions, 551 flow. Second operand 9 states and 1039 transitions. [2023-08-04 04:32:47,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 142 transitions, 1151 flow [2023-08-04 04:32:47,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 142 transitions, 1123 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-04 04:32:47,997 INFO L231 Difference]: Finished difference. Result has 94 places, 83 transitions, 712 flow [2023-08-04 04:32:47,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=712, PETRI_PLACES=94, PETRI_TRANSITIONS=83} [2023-08-04 04:32:47,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2023-08-04 04:32:47,998 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 83 transitions, 712 flow [2023-08-04 04:32:47,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 106.33333333333333) internal successors, (638), 6 states have internal predecessors, (638), 0 states have call successors, (0), 0 states 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 04:32:47,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:47,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:47,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 04:32:47,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:47,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:47,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1925465637, now seen corresponding path program 1 times [2023-08-04 04:32:47,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:47,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474894034] [2023-08-04 04:32:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:47,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:48,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:48,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474894034] [2023-08-04 04:32:48,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474894034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:48,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787619468] [2023-08-04 04:32:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:48,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:48,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:48,254 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 04:32:48,256 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 04:32:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:48,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-04 04:32:48,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:48,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:32:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:48,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787619468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:32:48,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:32:48,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-04 04:32:48,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340414259] [2023-08-04 04:32:48,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:32:48,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:32:48,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:48,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:32:48,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:32:48,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 221 [2023-08-04 04:32:48,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 83 transitions, 712 flow. Second operand has 6 states, 6 states have (on average 116.66666666666667) internal successors, (700), 6 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 04:32:48,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:48,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 221 [2023-08-04 04:32:48,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:48,740 INFO L124 PetriNetUnfolderBase]: 822/1815 cut-off events. [2023-08-04 04:32:48,740 INFO L125 PetriNetUnfolderBase]: For 6195/6203 co-relation queries the response was YES. [2023-08-04 04:32:48,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6888 conditions, 1815 events. 822/1815 cut-off events. For 6195/6203 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 11002 event pairs, 318 based on Foata normal form. 16/1827 useless extension candidates. Maximal degree in co-relation 5968. Up to 1026 conditions per place. [2023-08-04 04:32:48,751 INFO L140 encePairwiseOnDemand]: 212/221 looper letters, 101 selfloop transitions, 18 changer transitions 0/129 dead transitions. [2023-08-04 04:32:48,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 129 transitions, 1158 flow [2023-08-04 04:32:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 04:32:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 04:32:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 878 transitions. [2023-08-04 04:32:48,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675500969618616 [2023-08-04 04:32:48,754 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 878 transitions. [2023-08-04 04:32:48,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 878 transitions. [2023-08-04 04:32:48,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:48,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 878 transitions. [2023-08-04 04:32:48,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 125.42857142857143) internal successors, (878), 7 states have internal predecessors, (878), 0 states have call successors, (0), 0 states 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 04:32:48,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 221.0) internal successors, (1768), 8 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 04:32:48,759 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 221.0) internal successors, (1768), 8 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 04:32:48,793 INFO L175 Difference]: Start difference. First operand has 94 places, 83 transitions, 712 flow. Second operand 7 states and 878 transitions. [2023-08-04 04:32:48,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 129 transitions, 1158 flow [2023-08-04 04:32:48,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 129 transitions, 1100 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-04 04:32:48,806 INFO L231 Difference]: Finished difference. Result has 98 places, 83 transitions, 702 flow [2023-08-04 04:32:48,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=702, PETRI_PLACES=98, PETRI_TRANSITIONS=83} [2023-08-04 04:32:48,807 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2023-08-04 04:32:48,808 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 83 transitions, 702 flow [2023-08-04 04:32:48,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 116.66666666666667) internal successors, (700), 6 states have internal predecessors, (700), 0 states have call successors, (0), 0 states 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 04:32:48,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:48,808 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:48,819 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 04:32:49,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:49,014 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:49,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:49,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1390665648, now seen corresponding path program 1 times [2023-08-04 04:32:49,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:49,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791909096] [2023-08-04 04:32:49,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:49,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:49,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:49,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:49,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:49,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791909096] [2023-08-04 04:32:49,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791909096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:49,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:49,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:32:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125979462] [2023-08-04 04:32:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:49,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:32:49,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:32:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:32:49,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 221 [2023-08-04 04:32:49,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 83 transitions, 702 flow. Second operand has 6 states, 6 states have (on average 116.33333333333333) internal successors, (698), 6 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 04:32:49,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:49,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 221 [2023-08-04 04:32:49,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:49,429 INFO L124 PetriNetUnfolderBase]: 812/1793 cut-off events. [2023-08-04 04:32:49,429 INFO L125 PetriNetUnfolderBase]: For 6089/6094 co-relation queries the response was YES. [2023-08-04 04:32:49,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6885 conditions, 1793 events. 812/1793 cut-off events. For 6089/6094 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10775 event pairs, 412 based on Foata normal form. 12/1802 useless extension candidates. Maximal degree in co-relation 5993. Up to 1038 conditions per place. [2023-08-04 04:32:49,441 INFO L140 encePairwiseOnDemand]: 213/221 looper letters, 89 selfloop transitions, 16 changer transitions 0/115 dead transitions. [2023-08-04 04:32:49,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 115 transitions, 1050 flow [2023-08-04 04:32:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:32:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:32:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 753 transitions. [2023-08-04 04:32:49,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678733031674208 [2023-08-04 04:32:49,443 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 753 transitions. [2023-08-04 04:32:49,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 753 transitions. [2023-08-04 04:32:49,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:49,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 753 transitions. [2023-08-04 04:32:49,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 125.5) internal successors, (753), 6 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 04:32:49,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 04:32:49,448 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 04:32:49,448 INFO L175 Difference]: Start difference. First operand has 98 places, 83 transitions, 702 flow. Second operand 6 states and 753 transitions. [2023-08-04 04:32:49,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 115 transitions, 1050 flow [2023-08-04 04:32:49,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 115 transitions, 1013 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-04 04:32:49,461 INFO L231 Difference]: Finished difference. Result has 98 places, 82 transitions, 702 flow [2023-08-04 04:32:49,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=702, PETRI_PLACES=98, PETRI_TRANSITIONS=82} [2023-08-04 04:32:49,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2023-08-04 04:32:49,462 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 82 transitions, 702 flow [2023-08-04 04:32:49,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 116.33333333333333) internal successors, (698), 6 states have internal predecessors, (698), 0 states have call successors, (0), 0 states 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 04:32:49,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:49,462 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:49,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 04:32:49,462 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:49,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:49,463 INFO L85 PathProgramCache]: Analyzing trace with hash -63245767, now seen corresponding path program 1 times [2023-08-04 04:32:49,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:49,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522588953] [2023-08-04 04:32:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:49,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:49,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 04:32:49,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:49,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522588953] [2023-08-04 04:32:49,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522588953] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:49,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:49,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:32:49,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594679856] [2023-08-04 04:32:49,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:49,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:32:49,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:49,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:32:49,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:32:49,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 221 [2023-08-04 04:32:49,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 82 transitions, 702 flow. Second operand has 6 states, 6 states have (on average 109.83333333333333) internal successors, (659), 6 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 04:32:49,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:49,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 221 [2023-08-04 04:32:49,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:49,936 INFO L124 PetriNetUnfolderBase]: 223/638 cut-off events. [2023-08-04 04:32:49,936 INFO L125 PetriNetUnfolderBase]: For 2465/2465 co-relation queries the response was YES. [2023-08-04 04:32:49,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2822 conditions, 638 events. 223/638 cut-off events. For 2465/2465 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 3368 event pairs, 49 based on Foata normal form. 155/793 useless extension candidates. Maximal degree in co-relation 2462. Up to 483 conditions per place. [2023-08-04 04:32:49,940 INFO L140 encePairwiseOnDemand]: 215/221 looper letters, 72 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2023-08-04 04:32:49,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 889 flow [2023-08-04 04:32:49,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:32:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:32:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 472 transitions. [2023-08-04 04:32:49,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5339366515837104 [2023-08-04 04:32:49,942 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 472 transitions. [2023-08-04 04:32:49,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 472 transitions. [2023-08-04 04:32:49,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:49,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 472 transitions. [2023-08-04 04:32:49,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.0) internal successors, (472), 4 states have internal predecessors, (472), 0 states have call successors, (0), 0 states 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 04:32:49,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:49,945 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:49,945 INFO L175 Difference]: Start difference. First operand has 98 places, 82 transitions, 702 flow. Second operand 4 states and 472 transitions. [2023-08-04 04:32:49,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 889 flow [2023-08-04 04:32:49,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 87 transitions, 879 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 04:32:49,953 INFO L231 Difference]: Finished difference. Result has 99 places, 73 transitions, 621 flow [2023-08-04 04:32:49,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=621, PETRI_PLACES=99, PETRI_TRANSITIONS=73} [2023-08-04 04:32:49,954 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2023-08-04 04:32:49,954 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 73 transitions, 621 flow [2023-08-04 04:32:49,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 109.83333333333333) internal successors, (659), 6 states have internal predecessors, (659), 0 states have call successors, (0), 0 states 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 04:32:49,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:49,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:49,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 04:32:49,954 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:49,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:49,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1917664790, now seen corresponding path program 1 times [2023-08-04 04:32:49,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:49,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143990671] [2023-08-04 04:32:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:49,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:50,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:50,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143990671] [2023-08-04 04:32:50,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143990671] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:50,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:50,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:32:50,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37024576] [2023-08-04 04:32:50,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:50,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:32:50,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:32:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:32:50,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 221 [2023-08-04 04:32:50,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 73 transitions, 621 flow. Second operand has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 states have internal predecessors, (731), 0 states have call successors, (0), 0 states 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 04:32:50,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:50,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 221 [2023-08-04 04:32:50,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:50,360 INFO L124 PetriNetUnfolderBase]: 205/619 cut-off events. [2023-08-04 04:32:50,360 INFO L125 PetriNetUnfolderBase]: For 2347/2352 co-relation queries the response was YES. [2023-08-04 04:32:50,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2788 conditions, 619 events. 205/619 cut-off events. For 2347/2352 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3284 event pairs, 76 based on Foata normal form. 15/632 useless extension candidates. Maximal degree in co-relation 2491. Up to 220 conditions per place. [2023-08-04 04:32:50,362 INFO L140 encePairwiseOnDemand]: 208/221 looper letters, 94 selfloop transitions, 32 changer transitions 0/136 dead transitions. [2023-08-04 04:32:50,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 136 transitions, 1255 flow [2023-08-04 04:32:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-04 04:32:50,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-04 04:32:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1526 transitions. [2023-08-04 04:32:50,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49321266968325794 [2023-08-04 04:32:50,374 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1526 transitions. [2023-08-04 04:32:50,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1526 transitions. [2023-08-04 04:32:50,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:50,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1526 transitions. [2023-08-04 04:32:50,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 109.0) internal successors, (1526), 14 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states 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 04:32:50,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 221.0) internal successors, (3315), 15 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states 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 04:32:50,383 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 221.0) internal successors, (3315), 15 states have internal predecessors, (3315), 0 states have call successors, (0), 0 states 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 04:32:50,383 INFO L175 Difference]: Start difference. First operand has 99 places, 73 transitions, 621 flow. Second operand 14 states and 1526 transitions. [2023-08-04 04:32:50,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 136 transitions, 1255 flow [2023-08-04 04:32:50,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 136 transitions, 1234 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 04:32:50,392 INFO L231 Difference]: Finished difference. Result has 114 places, 80 transitions, 795 flow [2023-08-04 04:32:50,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=795, PETRI_PLACES=114, PETRI_TRANSITIONS=80} [2023-08-04 04:32:50,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2023-08-04 04:32:50,393 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 80 transitions, 795 flow [2023-08-04 04:32:50,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 states have internal predecessors, (731), 0 states have call successors, (0), 0 states 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 04:32:50,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:50,393 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:50,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 04:32:50,393 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:50,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash -694877219, now seen corresponding path program 1 times [2023-08-04 04:32:50,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:50,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515685684] [2023-08-04 04:32:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:50,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:50,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:50,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515685684] [2023-08-04 04:32:50,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515685684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:50,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:50,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:32:50,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331063560] [2023-08-04 04:32:50,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:50,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:32:50,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:50,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:32:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:32:50,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 221 [2023-08-04 04:32:50,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 80 transitions, 795 flow. Second operand has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 04:32:50,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:50,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 221 [2023-08-04 04:32:50,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:50,764 INFO L124 PetriNetUnfolderBase]: 204/619 cut-off events. [2023-08-04 04:32:50,764 INFO L125 PetriNetUnfolderBase]: For 3550/3557 co-relation queries the response was YES. [2023-08-04 04:32:50,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 619 events. 204/619 cut-off events. For 3550/3557 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3289 event pairs, 66 based on Foata normal form. 18/636 useless extension candidates. Maximal degree in co-relation 2783. Up to 247 conditions per place. [2023-08-04 04:32:50,768 INFO L140 encePairwiseOnDemand]: 209/221 looper letters, 87 selfloop transitions, 33 changer transitions 0/130 dead transitions. [2023-08-04 04:32:50,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 130 transitions, 1364 flow [2023-08-04 04:32:50,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-04 04:32:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-04 04:32:50,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1312 transitions. [2023-08-04 04:32:50,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947209653092006 [2023-08-04 04:32:50,778 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1312 transitions. [2023-08-04 04:32:50,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1312 transitions. [2023-08-04 04:32:50,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:50,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1312 transitions. [2023-08-04 04:32:50,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 109.33333333333333) internal successors, (1312), 12 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states 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 04:32:50,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 221.0) internal successors, (2873), 13 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states 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 04:32:50,793 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 221.0) internal successors, (2873), 13 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states 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 04:32:50,793 INFO L175 Difference]: Start difference. First operand has 114 places, 80 transitions, 795 flow. Second operand 12 states and 1312 transitions. [2023-08-04 04:32:50,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 130 transitions, 1364 flow [2023-08-04 04:32:50,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 130 transitions, 1298 flow, removed 9 selfloop flow, removed 10 redundant places. [2023-08-04 04:32:50,810 INFO L231 Difference]: Finished difference. Result has 119 places, 87 transitions, 935 flow [2023-08-04 04:32:50,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=935, PETRI_PLACES=119, PETRI_TRANSITIONS=87} [2023-08-04 04:32:50,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2023-08-04 04:32:50,810 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 87 transitions, 935 flow [2023-08-04 04:32:50,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.28571428571429) internal successors, (730), 7 states have internal predecessors, (730), 0 states have call successors, (0), 0 states 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 04:32:50,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:50,811 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:50,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 04:32:50,811 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:50,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1839238950, now seen corresponding path program 1 times [2023-08-04 04:32:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:50,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273770929] [2023-08-04 04:32:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:50,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:50,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:50,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273770929] [2023-08-04 04:32:50,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273770929] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:50,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87804927] [2023-08-04 04:32:50,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:50,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:50,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:51,571 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 04:32:51,572 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 04:32:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:51,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-04 04:32:51,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:51,745 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 04:32:51,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 04:32:51,770 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 04:32:51,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 04:32:51,780 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 04:32:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:51,805 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:32:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87804927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:51,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:32:51,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-04 04:32:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169690904] [2023-08-04 04:32:51,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:51,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 04:32:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 04:32:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-04 04:32:51,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 221 [2023-08-04 04:32:51,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 87 transitions, 935 flow. Second operand has 5 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 04:32:51,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:51,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 221 [2023-08-04 04:32:51,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:51,982 INFO L124 PetriNetUnfolderBase]: 156/474 cut-off events. [2023-08-04 04:32:51,982 INFO L125 PetriNetUnfolderBase]: For 2558/2558 co-relation queries the response was YES. [2023-08-04 04:32:51,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2251 conditions, 474 events. 156/474 cut-off events. For 2558/2558 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2251 event pairs, 63 based on Foata normal form. 6/480 useless extension candidates. Maximal degree in co-relation 2044. Up to 293 conditions per place. [2023-08-04 04:32:51,985 INFO L140 encePairwiseOnDemand]: 209/221 looper letters, 57 selfloop transitions, 22 changer transitions 0/84 dead transitions. [2023-08-04 04:32:51,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 84 transitions, 1016 flow [2023-08-04 04:32:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:32:51,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:32:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-08-04 04:32:51,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5248868778280543 [2023-08-04 04:32:51,987 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-08-04 04:32:51,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-08-04 04:32:51,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:51,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-08-04 04:32:51,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 0 states have call successors, (0), 0 states 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 04:32:51,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:51,989 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 221.0) internal successors, (1105), 5 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states 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 04:32:51,990 INFO L175 Difference]: Start difference. First operand has 119 places, 87 transitions, 935 flow. Second operand 4 states and 464 transitions. [2023-08-04 04:32:51,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 84 transitions, 1016 flow [2023-08-04 04:32:51,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 84 transitions, 916 flow, removed 16 selfloop flow, removed 11 redundant places. [2023-08-04 04:32:52,000 INFO L231 Difference]: Finished difference. Result has 109 places, 77 transitions, 769 flow [2023-08-04 04:32:52,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=769, PETRI_PLACES=109, PETRI_TRANSITIONS=77} [2023-08-04 04:32:52,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2023-08-04 04:32:52,000 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 77 transitions, 769 flow [2023-08-04 04:32:52,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 0 states have call successors, (0), 0 states 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 04:32:52,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:52,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:52,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 04:32:52,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:52,207 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:52,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash 446068972, now seen corresponding path program 1 times [2023-08-04 04:32:52,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:52,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752351165] [2023-08-04 04:32:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:52,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:52,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:52,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:52,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752351165] [2023-08-04 04:32:52,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752351165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:52,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42263958] [2023-08-04 04:32:52,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:52,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:52,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:52,341 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:32:52,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 04:32:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:52,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-04 04:32:52,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:52,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:32:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:52,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42263958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:32:52,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:32:52,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-04 04:32:52,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999549578] [2023-08-04 04:32:52,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:32:52,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:32:52,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:52,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:32:52,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:32:52,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 221 [2023-08-04 04:32:52,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 77 transitions, 769 flow. Second operand has 6 states, 6 states have (on average 117.5) internal successors, (705), 6 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 04:32:52,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:52,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 221 [2023-08-04 04:32:52,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:52,784 INFO L124 PetriNetUnfolderBase]: 136/452 cut-off events. [2023-08-04 04:32:52,784 INFO L125 PetriNetUnfolderBase]: For 2096/2098 co-relation queries the response was YES. [2023-08-04 04:32:52,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2107 conditions, 452 events. 136/452 cut-off events. For 2096/2098 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2173 event pairs, 63 based on Foata normal form. 4/455 useless extension candidates. Maximal degree in co-relation 1928. Up to 194 conditions per place. [2023-08-04 04:32:52,787 INFO L140 encePairwiseOnDemand]: 213/221 looper letters, 83 selfloop transitions, 15 changer transitions 1/106 dead transitions. [2023-08-04 04:32:52,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 106 transitions, 1094 flow [2023-08-04 04:32:52,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 04:32:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 04:32:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-08-04 04:32:52,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578539107950873 [2023-08-04 04:32:52,788 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-08-04 04:32:52,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-08-04 04:32:52,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:52,789 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-08-04 04:32:52,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states 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 04:32:52,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 221.0) internal successors, (1768), 8 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 04:32:52,792 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 221.0) internal successors, (1768), 8 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states 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 04:32:52,792 INFO L175 Difference]: Start difference. First operand has 109 places, 77 transitions, 769 flow. Second operand 7 states and 863 transitions. [2023-08-04 04:32:52,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 106 transitions, 1094 flow [2023-08-04 04:32:52,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 106 transitions, 1044 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 04:32:52,814 INFO L231 Difference]: Finished difference. Result has 112 places, 75 transitions, 722 flow [2023-08-04 04:32:52,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=722, PETRI_PLACES=112, PETRI_TRANSITIONS=75} [2023-08-04 04:32:52,815 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2023-08-04 04:32:52,815 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 75 transitions, 722 flow [2023-08-04 04:32:52,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.5) internal successors, (705), 6 states have internal predecessors, (705), 0 states have call successors, (0), 0 states 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 04:32:52,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:52,815 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:52,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 04:32:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:53,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:53,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:53,029 INFO L85 PathProgramCache]: Analyzing trace with hash 768068804, now seen corresponding path program 1 times [2023-08-04 04:32:53,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:53,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916548497] [2023-08-04 04:32:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:53,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:53,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:53,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916548497] [2023-08-04 04:32:53,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916548497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:53,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:53,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 04:32:53,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603535647] [2023-08-04 04:32:53,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:53,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 04:32:53,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:53,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 04:32:53,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-04 04:32:53,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 221 [2023-08-04 04:32:53,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 75 transitions, 722 flow. Second operand has 6 states, 6 states have (on average 117.16666666666667) internal successors, (703), 6 states have internal predecessors, (703), 0 states have call successors, (0), 0 states 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 04:32:53,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:53,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 221 [2023-08-04 04:32:53,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:53,367 INFO L124 PetriNetUnfolderBase]: 135/452 cut-off events. [2023-08-04 04:32:53,367 INFO L125 PetriNetUnfolderBase]: For 1908/1908 co-relation queries the response was YES. [2023-08-04 04:32:53,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 452 events. 135/452 cut-off events. For 1908/1908 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2167 event pairs, 61 based on Foata normal form. 2/454 useless extension candidates. Maximal degree in co-relation 1836. Up to 226 conditions per place. [2023-08-04 04:32:53,370 INFO L140 encePairwiseOnDemand]: 214/221 looper letters, 72 selfloop transitions, 13 changer transitions 1/93 dead transitions. [2023-08-04 04:32:53,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 93 transitions, 955 flow [2023-08-04 04:32:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 04:32:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 04:32:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 740 transitions. [2023-08-04 04:32:53,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580693815987934 [2023-08-04 04:32:53,372 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 740 transitions. [2023-08-04 04:32:53,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 740 transitions. [2023-08-04 04:32:53,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:53,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 740 transitions. [2023-08-04 04:32:53,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 123.33333333333333) internal successors, (740), 6 states have internal predecessors, (740), 0 states have call successors, (0), 0 states 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 04:32:53,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 04:32:53,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 221.0) internal successors, (1547), 7 states have internal predecessors, (1547), 0 states have call successors, (0), 0 states 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 04:32:53,375 INFO L175 Difference]: Start difference. First operand has 112 places, 75 transitions, 722 flow. Second operand 6 states and 740 transitions. [2023-08-04 04:32:53,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 93 transitions, 955 flow [2023-08-04 04:32:53,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 93 transitions, 914 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-04 04:32:53,383 INFO L231 Difference]: Finished difference. Result has 110 places, 73 transitions, 673 flow [2023-08-04 04:32:53,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=673, PETRI_PLACES=110, PETRI_TRANSITIONS=73} [2023-08-04 04:32:53,384 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2023-08-04 04:32:53,384 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 73 transitions, 673 flow [2023-08-04 04:32:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.16666666666667) internal successors, (703), 6 states have internal predecessors, (703), 0 states have call successors, (0), 0 states 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 04:32:53,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:53,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:53,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 04:32:53,385 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:53,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1779023619, now seen corresponding path program 1 times [2023-08-04 04:32:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495704851] [2023-08-04 04:32:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:53,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495704851] [2023-08-04 04:32:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495704851] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819500787] [2023-08-04 04:32:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:53,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:53,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:53,474 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:32:53,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 04:32:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:53,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 04:32:53,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:53,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 04:32:53,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 04:32:53,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819500787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 04:32:53,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 04:32:53,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-04 04:32:53,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505867977] [2023-08-04 04:32:53,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 04:32:53,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 04:32:53,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:53,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 04:32:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-04 04:32:53,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 221 [2023-08-04 04:32:53,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 73 transitions, 673 flow. Second operand has 11 states, 11 states have (on average 115.81818181818181) internal successors, (1274), 11 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 04:32:53,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:53,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 221 [2023-08-04 04:32:53,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:53,942 INFO L124 PetriNetUnfolderBase]: 135/449 cut-off events. [2023-08-04 04:32:53,943 INFO L125 PetriNetUnfolderBase]: For 1698/1700 co-relation queries the response was YES. [2023-08-04 04:32:53,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1951 conditions, 449 events. 135/449 cut-off events. For 1698/1700 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2150 event pairs, 59 based on Foata normal form. 3/451 useless extension candidates. Maximal degree in co-relation 1785. Up to 155 conditions per place. [2023-08-04 04:32:53,945 INFO L140 encePairwiseOnDemand]: 211/221 looper letters, 80 selfloop transitions, 21 changer transitions 1/109 dead transitions. [2023-08-04 04:32:53,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 1083 flow [2023-08-04 04:32:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 04:32:53,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 04:32:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 964 transitions. [2023-08-04 04:32:53,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452488687782805 [2023-08-04 04:32:53,947 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 964 transitions. [2023-08-04 04:32:53,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 964 transitions. [2023-08-04 04:32:53,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:53,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 964 transitions. [2023-08-04 04:32:53,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.5) internal successors, (964), 8 states have internal predecessors, (964), 0 states have call successors, (0), 0 states 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 04:32:53,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 221.0) internal successors, (1989), 9 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 04:32:53,951 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 221.0) internal successors, (1989), 9 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 04:32:53,951 INFO L175 Difference]: Start difference. First operand has 110 places, 73 transitions, 673 flow. Second operand 8 states and 964 transitions. [2023-08-04 04:32:53,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 1083 flow [2023-08-04 04:32:53,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 109 transitions, 1057 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 04:32:53,959 INFO L231 Difference]: Finished difference. Result has 113 places, 73 transitions, 702 flow [2023-08-04 04:32:53,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=702, PETRI_PLACES=113, PETRI_TRANSITIONS=73} [2023-08-04 04:32:53,960 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2023-08-04 04:32:53,960 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 73 transitions, 702 flow [2023-08-04 04:32:53,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 115.81818181818181) internal successors, (1274), 11 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states 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 04:32:53,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:53,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:53,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 04:32:54,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:54,167 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:54,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:54,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1792732765, now seen corresponding path program 1 times [2023-08-04 04:32:54,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:54,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594286697] [2023-08-04 04:32:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:54,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:54,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:54,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594286697] [2023-08-04 04:32:54,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594286697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:54,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:54,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-04 04:32:54,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236069344] [2023-08-04 04:32:54,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:54,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-04 04:32:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:54,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-04 04:32:54,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-04 04:32:54,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 221 [2023-08-04 04:32:54,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 73 transitions, 702 flow. Second operand has 7 states, 7 states have (on average 114.85714285714286) internal successors, (804), 7 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 04:32:54,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:54,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 221 [2023-08-04 04:32:54,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:54,518 INFO L124 PetriNetUnfolderBase]: 135/449 cut-off events. [2023-08-04 04:32:54,518 INFO L125 PetriNetUnfolderBase]: For 1781/1781 co-relation queries the response was YES. [2023-08-04 04:32:54,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1999 conditions, 449 events. 135/449 cut-off events. For 1781/1781 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2154 event pairs, 54 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 1824. Up to 158 conditions per place. [2023-08-04 04:32:54,520 INFO L140 encePairwiseOnDemand]: 211/221 looper letters, 79 selfloop transitions, 22 changer transitions 1/109 dead transitions. [2023-08-04 04:32:54,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 109 transitions, 1112 flow [2023-08-04 04:32:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 04:32:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 04:32:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 963 transitions. [2023-08-04 04:32:54,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544683257918552 [2023-08-04 04:32:54,522 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 963 transitions. [2023-08-04 04:32:54,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 963 transitions. [2023-08-04 04:32:54,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:54,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 963 transitions. [2023-08-04 04:32:54,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.375) internal successors, (963), 8 states have internal predecessors, (963), 0 states have call successors, (0), 0 states 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 04:32:54,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 221.0) internal successors, (1989), 9 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 04:32:54,525 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 221.0) internal successors, (1989), 9 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states 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 04:32:54,525 INFO L175 Difference]: Start difference. First operand has 113 places, 73 transitions, 702 flow. Second operand 8 states and 963 transitions. [2023-08-04 04:32:54,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 109 transitions, 1112 flow [2023-08-04 04:32:54,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 109 transitions, 1076 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-04 04:32:54,533 INFO L231 Difference]: Finished difference. Result has 115 places, 73 transitions, 722 flow [2023-08-04 04:32:54,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=722, PETRI_PLACES=115, PETRI_TRANSITIONS=73} [2023-08-04 04:32:54,534 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2023-08-04 04:32:54,534 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 73 transitions, 722 flow [2023-08-04 04:32:54,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.85714285714286) internal successors, (804), 7 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 04:32:54,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:54,534 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:54,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 04:32:54,535 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:54,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:54,535 INFO L85 PathProgramCache]: Analyzing trace with hash 370674932, now seen corresponding path program 1 times [2023-08-04 04:32:54,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:54,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370693466] [2023-08-04 04:32:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:54,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:54,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:54,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370693466] [2023-08-04 04:32:54,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370693466] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:54,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:54,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:32:54,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198705040] [2023-08-04 04:32:54,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:54,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 04:32:54,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:54,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 04:32:54,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-04 04:32:54,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 221 [2023-08-04 04:32:54,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 73 transitions, 722 flow. Second operand has 8 states, 8 states have (on average 102.75) internal successors, (822), 8 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 04:32:54,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:54,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 221 [2023-08-04 04:32:54,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:54,977 INFO L124 PetriNetUnfolderBase]: 135/447 cut-off events. [2023-08-04 04:32:54,977 INFO L125 PetriNetUnfolderBase]: For 1840/1842 co-relation queries the response was YES. [2023-08-04 04:32:54,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2014 conditions, 447 events. 135/447 cut-off events. For 1840/1842 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2132 event pairs, 46 based on Foata normal form. 3/449 useless extension candidates. Maximal degree in co-relation 1847. Up to 110 conditions per place. [2023-08-04 04:32:54,980 INFO L140 encePairwiseOnDemand]: 207/221 looper letters, 83 selfloop transitions, 35 changer transitions 1/126 dead transitions. [2023-08-04 04:32:54,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 126 transitions, 1252 flow [2023-08-04 04:32:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:32:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:32:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1591 transitions. [2023-08-04 04:32:54,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799396681749623 [2023-08-04 04:32:54,982 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1591 transitions. [2023-08-04 04:32:54,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1591 transitions. [2023-08-04 04:32:54,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:54,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1591 transitions. [2023-08-04 04:32:54,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 106.06666666666666) internal successors, (1591), 15 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states 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 04:32:54,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 221.0) internal successors, (3536), 16 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states 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 04:32:54,989 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 221.0) internal successors, (3536), 16 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states 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 04:32:54,989 INFO L175 Difference]: Start difference. First operand has 115 places, 73 transitions, 722 flow. Second operand 15 states and 1591 transitions. [2023-08-04 04:32:54,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 126 transitions, 1252 flow [2023-08-04 04:32:54,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 126 transitions, 1209 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-04 04:32:54,998 INFO L231 Difference]: Finished difference. Result has 126 places, 77 transitions, 831 flow [2023-08-04 04:32:54,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=831, PETRI_PLACES=126, PETRI_TRANSITIONS=77} [2023-08-04 04:32:54,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2023-08-04 04:32:54,999 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 77 transitions, 831 flow [2023-08-04 04:32:54,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.75) internal successors, (822), 8 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 04:32:54,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:54,999 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:54,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 04:32:54,999 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:54,999 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:55,000 INFO L85 PathProgramCache]: Analyzing trace with hash -534320016, now seen corresponding path program 1 times [2023-08-04 04:32:55,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:55,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860244553] [2023-08-04 04:32:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:55,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:55,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:55,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860244553] [2023-08-04 04:32:55,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860244553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:55,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:55,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:32:55,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918881975] [2023-08-04 04:32:55,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:55,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 04:32:55,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:55,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 04:32:55,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-04 04:32:55,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 221 [2023-08-04 04:32:55,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 77 transitions, 831 flow. Second operand has 8 states, 8 states have (on average 102.75) internal successors, (822), 8 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 04:32:55,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:55,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 221 [2023-08-04 04:32:55,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:55,396 INFO L124 PetriNetUnfolderBase]: 135/447 cut-off events. [2023-08-04 04:32:55,397 INFO L125 PetriNetUnfolderBase]: For 2232/2232 co-relation queries the response was YES. [2023-08-04 04:32:55,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2087 conditions, 447 events. 135/447 cut-off events. For 2232/2232 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2133 event pairs, 40 based on Foata normal form. 1/448 useless extension candidates. Maximal degree in co-relation 1912. Up to 116 conditions per place. [2023-08-04 04:32:55,400 INFO L140 encePairwiseOnDemand]: 207/221 looper letters, 82 selfloop transitions, 38 changer transitions 1/128 dead transitions. [2023-08-04 04:32:55,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 128 transitions, 1351 flow [2023-08-04 04:32:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 04:32:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 04:32:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1589 transitions. [2023-08-04 04:32:55,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47933634992458524 [2023-08-04 04:32:55,403 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1589 transitions. [2023-08-04 04:32:55,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1589 transitions. [2023-08-04 04:32:55,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:55,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1589 transitions. [2023-08-04 04:32:55,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 105.93333333333334) internal successors, (1589), 15 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states 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 04:32:55,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 221.0) internal successors, (3536), 16 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states 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 04:32:55,409 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 221.0) internal successors, (3536), 16 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states 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 04:32:55,409 INFO L175 Difference]: Start difference. First operand has 126 places, 77 transitions, 831 flow. Second operand 15 states and 1589 transitions. [2023-08-04 04:32:55,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 128 transitions, 1351 flow [2023-08-04 04:32:55,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 128 transitions, 1262 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-08-04 04:32:55,420 INFO L231 Difference]: Finished difference. Result has 130 places, 82 transitions, 909 flow [2023-08-04 04:32:55,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=909, PETRI_PLACES=130, PETRI_TRANSITIONS=82} [2023-08-04 04:32:55,421 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2023-08-04 04:32:55,421 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 82 transitions, 909 flow [2023-08-04 04:32:55,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.75) internal successors, (822), 8 states have internal predecessors, (822), 0 states have call successors, (0), 0 states 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 04:32:55,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:55,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:55,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-04 04:32:55,422 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:55,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:55,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1594627471, now seen corresponding path program 1 times [2023-08-04 04:32:55,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:55,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312724036] [2023-08-04 04:32:55,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:55,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:55,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:55,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312724036] [2023-08-04 04:32:55,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312724036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:55,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:55,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:32:55,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340774742] [2023-08-04 04:32:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:55,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 04:32:55,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 04:32:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-04 04:32:55,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 221 [2023-08-04 04:32:55,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 82 transitions, 909 flow. Second operand has 8 states, 8 states have (on average 112.75) internal successors, (902), 8 states have internal predecessors, (902), 0 states have call successors, (0), 0 states 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 04:32:55,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:55,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 221 [2023-08-04 04:32:55,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:55,761 INFO L124 PetriNetUnfolderBase]: 133/440 cut-off events. [2023-08-04 04:32:55,762 INFO L125 PetriNetUnfolderBase]: For 2213/2215 co-relation queries the response was YES. [2023-08-04 04:32:55,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2036 conditions, 440 events. 133/440 cut-off events. For 2213/2215 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2096 event pairs, 72 based on Foata normal form. 6/445 useless extension candidates. Maximal degree in co-relation 1864. Up to 243 conditions per place. [2023-08-04 04:32:55,765 INFO L140 encePairwiseOnDemand]: 209/221 looper letters, 63 selfloop transitions, 37 changer transitions 0/107 dead transitions. [2023-08-04 04:32:55,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 107 transitions, 1218 flow [2023-08-04 04:32:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 04:32:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 04:32:55,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1043 transitions. [2023-08-04 04:32:55,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5243841126194068 [2023-08-04 04:32:55,767 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1043 transitions. [2023-08-04 04:32:55,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1043 transitions. [2023-08-04 04:32:55,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:55,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1043 transitions. [2023-08-04 04:32:55,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.88888888888889) internal successors, (1043), 9 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states 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 04:32:55,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 04:32:55,771 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 04:32:55,771 INFO L175 Difference]: Start difference. First operand has 130 places, 82 transitions, 909 flow. Second operand 9 states and 1043 transitions. [2023-08-04 04:32:55,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 107 transitions, 1218 flow [2023-08-04 04:32:55,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 107 transitions, 1085 flow, removed 10 selfloop flow, removed 18 redundant places. [2023-08-04 04:32:55,781 INFO L231 Difference]: Finished difference. Result has 119 places, 81 transitions, 822 flow [2023-08-04 04:32:55,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=822, PETRI_PLACES=119, PETRI_TRANSITIONS=81} [2023-08-04 04:32:55,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2023-08-04 04:32:55,781 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 81 transitions, 822 flow [2023-08-04 04:32:55,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 112.75) internal successors, (902), 8 states have internal predecessors, (902), 0 states have call successors, (0), 0 states 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 04:32:55,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:55,782 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:55,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-04 04:32:55,782 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:55,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash 974066988, now seen corresponding path program 1 times [2023-08-04 04:32:55,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:55,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391012847] [2023-08-04 04:32:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:55,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:55,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:55,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391012847] [2023-08-04 04:32:55,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391012847] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:55,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:55,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-04 04:32:55,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487693948] [2023-08-04 04:32:55,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:55,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 04:32:55,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 04:32:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-08-04 04:32:55,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 221 [2023-08-04 04:32:55,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 81 transitions, 822 flow. Second operand has 9 states, 9 states have (on average 100.66666666666667) internal successors, (906), 9 states have internal predecessors, (906), 0 states have call successors, (0), 0 states 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 04:32:55,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:55,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 221 [2023-08-04 04:32:55,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:56,252 INFO L124 PetriNetUnfolderBase]: 131/434 cut-off events. [2023-08-04 04:32:56,253 INFO L125 PetriNetUnfolderBase]: For 1444/1446 co-relation queries the response was YES. [2023-08-04 04:32:56,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1944 conditions, 434 events. 131/434 cut-off events. For 1444/1446 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2052 event pairs, 55 based on Foata normal form. 6/439 useless extension candidates. Maximal degree in co-relation 1747. Up to 161 conditions per place. [2023-08-04 04:32:56,255 INFO L140 encePairwiseOnDemand]: 208/221 looper letters, 62 selfloop transitions, 47 changer transitions 0/116 dead transitions. [2023-08-04 04:32:56,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 116 transitions, 1213 flow [2023-08-04 04:32:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-04 04:32:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-04 04:32:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1635 transitions. [2023-08-04 04:32:56,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623868778280543 [2023-08-04 04:32:56,258 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1635 transitions. [2023-08-04 04:32:56,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1635 transitions. [2023-08-04 04:32:56,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:56,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1635 transitions. [2023-08-04 04:32:56,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 102.1875) internal successors, (1635), 16 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states 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 04:32:56,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 221.0) internal successors, (3757), 17 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states 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 04:32:56,266 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 221.0) internal successors, (3757), 17 states have internal predecessors, (3757), 0 states have call successors, (0), 0 states 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 04:32:56,266 INFO L175 Difference]: Start difference. First operand has 119 places, 81 transitions, 822 flow. Second operand 16 states and 1635 transitions. [2023-08-04 04:32:56,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 116 transitions, 1213 flow [2023-08-04 04:32:56,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 116 transitions, 1102 flow, removed 0 selfloop flow, removed 13 redundant places. [2023-08-04 04:32:56,274 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 805 flow [2023-08-04 04:32:56,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=703, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=805, PETRI_PLACES=120, PETRI_TRANSITIONS=82} [2023-08-04 04:32:56,275 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2023-08-04 04:32:56,275 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 805 flow [2023-08-04 04:32:56,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 100.66666666666667) internal successors, (906), 9 states have internal predecessors, (906), 0 states have call successors, (0), 0 states 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 04:32:56,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:56,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 04:32:56,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-04 04:32:56,276 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 04:32:56,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1350124899, now seen corresponding path program 1 times [2023-08-04 04:32:56,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:56,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807800123] [2023-08-04 04:32:56,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:56,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 04:32:56,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:56,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807800123] [2023-08-04 04:32:56,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807800123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:56,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 04:32:56,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-04 04:32:56,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274674861] [2023-08-04 04:32:56,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:56,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 04:32:56,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:56,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 04:32:56,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-04 04:32:56,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 221 [2023-08-04 04:32:56,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 805 flow. Second operand has 8 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 0 states have call successors, (0), 0 states 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 04:32:56,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:56,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 221 [2023-08-04 04:32:56,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:56,749 INFO L124 PetriNetUnfolderBase]: 130/432 cut-off events. [2023-08-04 04:32:56,749 INFO L125 PetriNetUnfolderBase]: For 1363/1365 co-relation queries the response was YES. [2023-08-04 04:32:56,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1926 conditions, 432 events. 130/432 cut-off events. For 1363/1365 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2061 event pairs, 71 based on Foata normal form. 4/435 useless extension candidates. Maximal degree in co-relation 1224. Up to 237 conditions per place. [2023-08-04 04:32:56,751 INFO L140 encePairwiseOnDemand]: 210/221 looper letters, 0 selfloop transitions, 0 changer transitions 106/106 dead transitions. [2023-08-04 04:32:56,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 106 transitions, 1104 flow [2023-08-04 04:32:56,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 04:32:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 04:32:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1041 transitions. [2023-08-04 04:32:56,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5233785822021116 [2023-08-04 04:32:56,752 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1041 transitions. [2023-08-04 04:32:56,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1041 transitions. [2023-08-04 04:32:56,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:56,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1041 transitions. [2023-08-04 04:32:56,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states 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 04:32:56,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 04:32:56,756 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 221.0) internal successors, (2210), 10 states have internal predecessors, (2210), 0 states have call successors, (0), 0 states 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 04:32:56,756 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 805 flow. Second operand 9 states and 1041 transitions. [2023-08-04 04:32:56,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 106 transitions, 1104 flow [2023-08-04 04:32:56,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 106 transitions, 1018 flow, removed 3 selfloop flow, removed 13 redundant places. [2023-08-04 04:32:56,762 INFO L231 Difference]: Finished difference. Result has 114 places, 0 transitions, 0 flow [2023-08-04 04:32:56,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=114, PETRI_TRANSITIONS=0} [2023-08-04 04:32:56,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2023-08-04 04:32:56,763 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 0 transitions, 0 flow [2023-08-04 04:32:56,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 0 states have call successors, (0), 0 states 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 04:32:56,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 04:32:56,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 04:32:56,763 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 04:32:56,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-04 04:32:56,764 INFO L445 BasicCegarLoop]: Path program histogram: [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 04:32:56,764 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 04:32:56,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 288 flow [2023-08-04 04:32:56,784 INFO L124 PetriNetUnfolderBase]: 19/263 cut-off events. [2023-08-04 04:32:56,784 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 04:32:56,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 263 events. 19/263 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 662 event pairs, 0 based on Foata normal form. 0/231 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-04 04:32:56,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 135 transitions, 288 flow [2023-08-04 04:32:56,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 81 transitions, 174 flow [2023-08-04 04:32:56,785 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 04:32:56,785 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 81 transitions, 174 flow [2023-08-04 04:32:56,786 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 81 transitions, 174 flow [2023-08-04 04:32:56,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 81 transitions, 174 flow [2023-08-04 04:32:56,791 INFO L124 PetriNetUnfolderBase]: 0/94 cut-off events. [2023-08-04 04:32:56,792 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:32:56,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104 conditions, 94 events. 0/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 72 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2023-08-04 04:32:56,792 INFO L119 LiptonReduction]: Number of co-enabled transitions 1404 [2023-08-04 04:32:59,407 INFO L134 LiptonReduction]: Checked pairs total: 4993 [2023-08-04 04:32:59,407 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-04 04:32:59,409 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 04:32:59,409 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;@1ab5b429, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 04:32:59,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 04:32:59,411 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 04:32:59,411 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 04:32:59,411 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 04:32:59,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 04:32:59,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-04 04:32:59,412 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 04:32:59,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 04:32:59,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1577317516, now seen corresponding path program 1 times [2023-08-04 04:32:59,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 04:32:59,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278594754] [2023-08-04 04:32:59,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:59,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 04:32:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:59,441 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 04:32:59,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 04:32:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278594754] [2023-08-04 04:32:59,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278594754] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 04:32:59,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732673983] [2023-08-04 04:32:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 04:32:59,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 04:32:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 04:32:59,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 04:32:59,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 04:32:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 04:32:59,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 04:32:59,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 04:32:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 04:32:59,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 04:32:59,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732673983] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 04:32:59,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 04:32:59,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-04 04:32:59,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731442113] [2023-08-04 04:32:59,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 04:32:59,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 04:32:59,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 04:32:59,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 04:32:59,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 04:32:59,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 193 [2023-08-04 04:32:59,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 64 flow. Second operand has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 04:32:59,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 04:32:59,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 193 [2023-08-04 04:32:59,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 04:32:59,605 INFO L124 PetriNetUnfolderBase]: 63/181 cut-off events. [2023-08-04 04:32:59,605 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-04 04:32:59,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 181 events. 63/181 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 660 event pairs, 24 based on Foata normal form. 64/244 useless extension candidates. Maximal degree in co-relation 86. Up to 135 conditions per place. [2023-08-04 04:32:59,606 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-08-04 04:32:59,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 122 flow [2023-08-04 04:32:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 04:32:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 04:32:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-04 04:32:59,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6502590673575129 [2023-08-04 04:32:59,607 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-04 04:32:59,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-04 04:32:59,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 04:32:59,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-04 04:32:59,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.5) internal successors, (502), 4 states have internal predecessors, (502), 0 states have call successors, (0), 0 states 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 04:32:59,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states 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 04:32:59,610 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 193.0) internal successors, (965), 5 states have internal predecessors, (965), 0 states have call successors, (0), 0 states 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 04:32:59,610 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 4 states and 502 transitions. [2023-08-04 04:32:59,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 122 flow [2023-08-04 04:32:59,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 04:32:59,611 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-08-04 04:32:59,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=193, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=32, PETRI_TRANSITIONS=0} [2023-08-04 04:32:59,616 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-04 04:32:59,616 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-08-04 04:32:59,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states 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 04:32:59,616 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-04 04:32:59,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 04:32:59,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-04 04:32:59,817 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 04:32:59,817 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (2/2) [2023-08-04 04:32:59,817 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 04:32:59,818 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 04:32:59,822 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 04:32:59 BasicIcfg [2023-08-04 04:32:59,822 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 04:32:59,823 INFO L158 Benchmark]: Toolchain (without parser) took 27999.25ms. Allocated memory was 461.4MB in the beginning and 553.6MB in the end (delta: 92.3MB). Free memory was 413.8MB in the beginning and 448.7MB in the end (delta: -34.9MB). Peak memory consumption was 60.5MB. Max. memory is 16.0GB. [2023-08-04 04:32:59,823 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 358.6MB. Free memory was 315.6MB in the beginning and 315.5MB in the end (delta: 161.0kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 04:32:59,823 INFO L158 Benchmark]: CACSL2BoogieTranslator took 398.09ms. Allocated memory is still 461.4MB. Free memory was 413.0MB in the beginning and 394.1MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 04:32:59,823 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.68ms. Allocated memory is still 461.4MB. Free memory was 394.1MB in the beginning and 391.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:32:59,824 INFO L158 Benchmark]: Boogie Preprocessor took 28.65ms. Allocated memory is still 461.4MB. Free memory was 391.9MB in the beginning and 389.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 04:32:59,824 INFO L158 Benchmark]: RCFGBuilder took 500.54ms. Allocated memory is still 461.4MB. Free memory was 389.9MB in the beginning and 373.9MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 04:32:59,824 INFO L158 Benchmark]: TraceAbstraction took 27023.92ms. Allocated memory was 461.4MB in the beginning and 553.6MB in the end (delta: 92.3MB). Free memory was 373.1MB in the beginning and 448.7MB in the end (delta: -75.6MB). Peak memory consumption was 18.6MB. Max. memory is 16.0GB. [2023-08-04 04:32:59,825 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 358.6MB. Free memory was 315.6MB in the beginning and 315.5MB in the end (delta: 161.0kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 398.09ms. Allocated memory is still 461.4MB. Free memory was 413.0MB in the beginning and 394.1MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.68ms. Allocated memory is still 461.4MB. Free memory was 394.1MB in the beginning and 391.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.65ms. Allocated memory is still 461.4MB. Free memory was 391.9MB in the beginning and 389.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 500.54ms. Allocated memory is still 461.4MB. Free memory was 389.9MB in the beginning and 373.9MB in the end (delta: 15.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 27023.92ms. Allocated memory was 461.4MB in the beginning and 553.6MB in the end (delta: 92.3MB). Free memory was 373.1MB in the beginning and 448.7MB in the end (delta: -75.6MB). Peak memory consumption was 18.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 93 PlacesBefore, 25 PlacesAfterwards, 93 TransitionsBefore, 22 TransitionsAfterwards, 1476 CoEnabledTransitionPairs, 7 FixpointIterations, 32 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 79 TotalNumberOfCompositions, 3394 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1402, independent: 1188, independent conditional: 0, independent unconditional: 1188, dependent: 214, dependent conditional: 0, dependent unconditional: 214, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 762, independent: 726, independent conditional: 0, independent unconditional: 726, dependent: 36, dependent conditional: 0, dependent unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1402, independent: 462, independent conditional: 0, independent unconditional: 462, dependent: 178, dependent conditional: 0, dependent unconditional: 178, unknown: 762, unknown conditional: 0, unknown unconditional: 762] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 27, Positive conditional cache size: 0, Positive unconditional cache size: 27, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 65 PlacesBefore, 8 PlacesAfterwards, 62 TransitionsBefore, 5 TransitionsAfterwards, 360 CoEnabledTransitionPairs, 7 FixpointIterations, 34 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 0 ChoiceCompositions, 60 TotalNumberOfCompositions, 259 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 259, independent: 259, independent conditional: 0, independent unconditional: 259, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 196, independent: 196, independent conditional: 0, independent unconditional: 196, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 259, independent: 63, independent conditional: 0, independent unconditional: 63, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 196, unknown conditional: 0, unknown unconditional: 196] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 114 PlacesBefore, 41 PlacesAfterwards, 112 TransitionsBefore, 37 TransitionsAfterwards, 3636 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 86 TotalNumberOfCompositions, 11328 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4023, independent: 3697, independent conditional: 0, independent unconditional: 3697, dependent: 326, dependent conditional: 0, dependent unconditional: 326, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1813, independent: 1746, independent conditional: 0, independent unconditional: 1746, dependent: 67, dependent conditional: 0, dependent unconditional: 67, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4023, independent: 1951, independent conditional: 0, independent unconditional: 1951, dependent: 259, dependent conditional: 0, dependent unconditional: 259, unknown: 1813, unknown conditional: 0, unknown unconditional: 1813] , Statistics on independence cache: Total cache size (in pairs): 182, Positive cache size: 142, Positive conditional cache size: 0, Positive unconditional cache size: 142, Negative cache size: 40, Negative conditional cache size: 0, Negative unconditional cache size: 40, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 86 PlacesBefore, 31 PlacesAfterwards, 81 TransitionsBefore, 26 TransitionsAfterwards, 1404 CoEnabledTransitionPairs, 7 FixpointIterations, 32 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 4993 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1685, independent: 1414, independent conditional: 0, independent unconditional: 1414, dependent: 271, dependent conditional: 0, dependent unconditional: 271, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 680, independent: 643, independent conditional: 0, independent unconditional: 643, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1685, independent: 771, independent conditional: 0, independent unconditional: 771, dependent: 234, dependent conditional: 0, dependent unconditional: 234, unknown: 680, unknown conditional: 0, unknown unconditional: 680] , Statistics on independence cache: Total cache size (in pairs): 93, Positive cache size: 71, Positive conditional cache size: 0, Positive unconditional cache size: 71, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 129 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.9s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 100 IncrementalHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 7 mSDtfsCounter, 100 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=1, InterpolantAutomatonStates: 7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 47 SizeOfPredicates, 0 NumberOfNonLiveVariables, 130 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 148 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.1s, OverallIterations: 25, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 8.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2572 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1997 mSDsluCounter, 1588 SdHoareTripleChecker+Invalid, 3.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1423 mSDsCounter, 252 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6970 IncrementalHoareTripleChecker+Invalid, 7222 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 252 mSolverCounterUnsat, 165 mSDtfsCounter, 6970 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 488 GetRequests, 268 SyntacticMatches, 14 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=935occurred in iteration=15, InterpolantAutomatonStates: 197, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 708 NumberOfCodeBlocks, 708 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 787 ConstructedInterpolants, 0 QuantifiedInterpolants, 3272 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1534 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 39 InterpolantComputations, 19 PerfectInterpolantSequences, 125/213 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 129 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.9s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 148 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 52 IncrementalHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 0 mSDtfsCounter, 52 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 38 SizeOfPredicates, 0 NumberOfNonLiveVariables, 135 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 7/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-04 04:32:59,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...