/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 22:06:04,952 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 22:06:05,010 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 22:06:05,015 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 22:06:05,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 22:06:05,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 22:06:05,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 22:06:05,037 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 22:06:05,038 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 22:06:05,040 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 22:06:05,041 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 22:06:05,041 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 22:06:05,041 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 22:06:05,042 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 22:06:05,042 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 22:06:05,042 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 22:06:05,043 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 22:06:05,043 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 22:06:05,043 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 22:06:05,043 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 22:06:05,043 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 22:06:05,044 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 22:06:05,044 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 22:06:05,044 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 22:06:05,044 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 22:06:05,044 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 22:06:05,044 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 22:06:05,045 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 22:06:05,045 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 22:06:05,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 22:06:05,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:06:05,046 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 22:06:05,046 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 22:06:05,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 22:06:05,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 22:06:05,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 22:06:05,046 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 22:06:05,047 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 22:06:05,047 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 22:06:05,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 22:06:05,047 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 22:06:05,047 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 22:06:05,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 22:06:05,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 22:06:05,211 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 22:06:05,212 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 22:06:05,215 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 22:06:05,216 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i [2023-08-03 22:06:06,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 22:06:06,372 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 22:06:06,372 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i [2023-08-03 22:06:06,381 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb18c55b/a30edcb4a45d4ff4a787ebe256224fbc/FLAGb5b7af3eb [2023-08-03 22:06:06,392 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fb18c55b/a30edcb4a45d4ff4a787ebe256224fbc [2023-08-03 22:06:06,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 22:06:06,395 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 22:06:06,395 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 22:06:06,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 22:06:06,398 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 22:06:06,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,399 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18897a7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06, skipping insertion in model container [2023-08-03 22:06:06,399 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,426 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 22:06:06,529 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] [2023-08-03 22:06:06,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:06:06,611 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 22:06:06,620 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] [2023-08-03 22:06:06,637 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-03 22:06:06,650 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-03 22:06:06,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 22:06:06,693 INFO L206 MainTranslator]: Completed translation [2023-08-03 22:06:06,694 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06 WrapperNode [2023-08-03 22:06:06,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 22:06:06,695 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 22:06:06,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 22:06:06,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 22:06:06,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,726 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,739 INFO L138 Inliner]: procedures = 162, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 93 [2023-08-03 22:06:06,739 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 22:06:06,740 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 22:06:06,740 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 22:06:06,740 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 22:06:06,748 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,748 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,755 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,765 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,767 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,768 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,769 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,770 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 22:06:06,771 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 22:06:06,771 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 22:06:06,771 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 22:06:06,771 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (1/1) ... [2023-08-03 22:06:06,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 22:06:06,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:06,821 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 22:06:06,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 22:06:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 22:06:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2023-08-03 22:06:06,858 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2023-08-03 22:06:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 22:06:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 22:06:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 22:06:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 22:06:06,859 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 22:06:06,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 22:06:06,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 22:06:06,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 22:06:06,861 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 22:06:06,965 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 22:06:06,967 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 22:06:07,100 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 22:06:07,105 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 22:06:07,105 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 22:06:07,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:06:07 BoogieIcfgContainer [2023-08-03 22:06:07,107 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 22:06:07,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 22:06:07,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 22:06:07,110 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 22:06:07,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 10:06:06" (1/3) ... [2023-08-03 22:06:07,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4d52a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:06:07, skipping insertion in model container [2023-08-03 22:06:07,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 10:06:06" (2/3) ... [2023-08-03 22:06:07,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d4d52a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 10:06:07, skipping insertion in model container [2023-08-03 22:06:07,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 10:06:07" (3/3) ... [2023-08-03 22:06:07,112 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_13-privatized_29-multiple-protecting2-vesal_true_bound2.i [2023-08-03 22:06:07,117 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 22:06:07,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 22:06:07,123 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-03 22:06:07,123 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 22:06:07,174 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 22:06:07,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 115 transitions, 238 flow [2023-08-03 22:06:07,266 INFO L124 PetriNetUnfolderBase]: 11/167 cut-off events. [2023-08-03 22:06:07,267 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:06:07,270 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. [2023-08-03 22:06:07,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 115 transitions, 238 flow [2023-08-03 22:06:07,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 62 transitions, 129 flow [2023-08-03 22:06:07,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:07,280 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 62 transitions, 129 flow [2023-08-03 22:06:07,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 62 transitions, 129 flow [2023-08-03 22:06:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 62 transitions, 129 flow [2023-08-03 22:06:07,291 INFO L124 PetriNetUnfolderBase]: 0/66 cut-off events. [2023-08-03 22:06:07,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:07,292 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. [2023-08-03 22:06:07,292 INFO L119 LiptonReduction]: Number of co-enabled transitions 360 [2023-08-03 22:06:09,794 INFO L134 LiptonReduction]: Checked pairs total: 264 [2023-08-03 22:06:09,794 INFO L136 LiptonReduction]: Total number of compositions: 60 [2023-08-03 22:06:09,804 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:06:09,809 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;@4a158540, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:09,809 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:06:09,812 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:09,813 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-08-03 22:06:09,813 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:09,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:09,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:06:09,814 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:06:09,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:09,817 INFO L85 PathProgramCache]: Analyzing trace with hash 11423502, now seen corresponding path program 1 times [2023-08-03 22:06:09,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:09,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390925749] [2023-08-03 22:06:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:09,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:06:09,995 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 22:06:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 22:06:10,054 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 22:06:10,056 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 22:06:10,057 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:06:10,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 22:06:10,059 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:06:10,065 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 22:06:10,065 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 22:06:10,065 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 22:06:10,090 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 22:06:10,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 288 flow [2023-08-03 22:06:10,154 INFO L124 PetriNetUnfolderBase]: 19/263 cut-off events. [2023-08-03 22:06:10,154 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:06:10,156 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. [2023-08-03 22:06:10,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 135 transitions, 288 flow [2023-08-03 22:06:10,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 81 transitions, 174 flow [2023-08-03 22:06:10,157 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:10,157 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 86 places, 81 transitions, 174 flow [2023-08-03 22:06:10,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 86 places, 81 transitions, 174 flow [2023-08-03 22:06:10,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 86 places, 81 transitions, 174 flow [2023-08-03 22:06:10,167 INFO L124 PetriNetUnfolderBase]: 0/94 cut-off events. [2023-08-03 22:06:10,168 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:06:10,168 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. [2023-08-03 22:06:10,169 INFO L119 LiptonReduction]: Number of co-enabled transitions 1404 [2023-08-03 22:06:12,085 INFO L134 LiptonReduction]: Checked pairs total: 4497 [2023-08-03 22:06:12,085 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-03 22:06:12,087 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 22:06:12,090 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;@4a158540, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:12,090 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 22:06:12,092 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:12,092 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 22:06:12,092 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 22:06:12,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:12,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-08-03 22:06:12,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 22:06:12,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2032487934, now seen corresponding path program 1 times [2023-08-03 22:06:12,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:12,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163946909] [2023-08-03 22:06:12,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:12,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:12,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:12,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:12,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163946909] [2023-08-03 22:06:12,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163946909] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:12,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:12,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:06:12,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050216565] [2023-08-03 22:06:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:12,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:06:12,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:12,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:06:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:06:12,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 193 [2023-08-03 22:06:12,282 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) [2023-08-03 22:06:12,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:12,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 193 [2023-08-03 22:06:12,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:12,342 INFO L124 PetriNetUnfolderBase]: 63/181 cut-off events. [2023-08-03 22:06:12,342 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-03 22:06:12,343 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. [2023-08-03 22:06:12,344 INFO L140 encePairwiseOnDemand]: 191/193 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-08-03 22:06:12,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 122 flow [2023-08-03 22:06:12,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 502 transitions. [2023-08-03 22:06:12,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6502590673575129 [2023-08-03 22:06:12,360 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 502 transitions. [2023-08-03 22:06:12,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 502 transitions. [2023-08-03 22:06:12,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:12,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 502 transitions. [2023-08-03 22:06:12,368 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) [2023-08-03 22:06:12,373 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) [2023-08-03 22:06:12,373 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) [2023-08-03 22:06:12,374 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 64 flow. Second operand 4 states and 502 transitions. [2023-08-03 22:06:12,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 122 flow [2023-08-03 22:06:12,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:12,377 INFO L231 Difference]: Finished difference. Result has 32 places, 0 transitions, 0 flow [2023-08-03 22:06:12,379 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} [2023-08-03 22:06:12,382 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 1 predicate places. [2023-08-03 22:06:12,382 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 0 transitions, 0 flow [2023-08-03 22:06:12,383 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) [2023-08-03 22:06:12,383 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 22:06:12,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 22:06:12,383 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 22:06:12,384 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 22:06:12,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 288 flow [2023-08-03 22:06:12,414 INFO L124 PetriNetUnfolderBase]: 19/263 cut-off events. [2023-08-03 22:06:12,414 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 22:06:12,416 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. [2023-08-03 22:06:12,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 135 transitions, 288 flow [2023-08-03 22:06:12,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 112 transitions, 232 flow [2023-08-03 22:06:12,420 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 22:06:12,421 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 112 transitions, 232 flow [2023-08-03 22:06:12,421 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 112 transitions, 232 flow [2023-08-03 22:06:12,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 112 transitions, 232 flow [2023-08-03 22:06:12,434 INFO L124 PetriNetUnfolderBase]: 9/189 cut-off events. [2023-08-03 22:06:12,434 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 22:06:12,436 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. [2023-08-03 22:06:12,438 INFO L119 LiptonReduction]: Number of co-enabled transitions 3636 [2023-08-03 22:06:14,603 INFO L134 LiptonReduction]: Checked pairs total: 12482 [2023-08-03 22:06:14,603 INFO L136 LiptonReduction]: Total number of compositions: 84 [2023-08-03 22:06:14,605 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 22:06:14,605 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;@4a158540, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 22:06:14,605 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 22:06:14,607 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 22:06:14,607 INFO L124 PetriNetUnfolderBase]: 1/8 cut-off events. [2023-08-03 22:06:14,607 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 22:06:14,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:14,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 22:06:14,607 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:14,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:14,608 INFO L85 PathProgramCache]: Analyzing trace with hash 20588565, now seen corresponding path program 1 times [2023-08-03 22:06:14,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:14,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840396508] [2023-08-03 22:06:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:14,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:14,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:14,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840396508] [2023-08-03 22:06:14,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840396508] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:14,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:14,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:06:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869125342] [2023-08-03 22:06:14,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:14,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:06:14,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:06:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:06:14,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 219 [2023-08-03 22:06:14,682 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) [2023-08-03 22:06:14,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:14,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 219 [2023-08-03 22:06:14,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:14,845 INFO L124 PetriNetUnfolderBase]: 1365/2571 cut-off events. [2023-08-03 22:06:14,845 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 22:06:14,847 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 15991 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. [2023-08-03 22:06:14,854 INFO L140 encePairwiseOnDemand]: 215/219 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-03 22:06:14,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 45 transitions, 172 flow [2023-08-03 22:06:14,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:06:14,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:06:14,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2023-08-03 22:06:14,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027397260273972 [2023-08-03 22:06:14,856 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 396 transitions. [2023-08-03 22:06:14,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 396 transitions. [2023-08-03 22:06:14,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:14,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 396 transitions. [2023-08-03 22:06:14,857 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) [2023-08-03 22:06:14,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:14,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:14,858 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 3 states and 396 transitions. [2023-08-03 22:06:14,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 45 transitions, 172 flow [2023-08-03 22:06:14,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:06:14,860 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 92 flow [2023-08-03 22:06:14,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, 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} [2023-08-03 22:06:14,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 3 predicate places. [2023-08-03 22:06:14,861 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 92 flow [2023-08-03 22:06:14,861 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) [2023-08-03 22:06:14,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:14,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:14,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 22:06:14,862 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:14,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash -892518190, now seen corresponding path program 1 times [2023-08-03 22:06:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274315312] [2023-08-03 22:06:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:14,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:14,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:14,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274315312] [2023-08-03 22:06:14,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274315312] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:14,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750965727] [2023-08-03 22:06:14,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:14,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:14,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:14,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:06:14,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 22:06:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:14,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 22:06:14,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:15,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:15,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:06:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 22:06:15,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750965727] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:06:15,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:06:15,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 22:06:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003361557] [2023-08-03 22:06:15,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:06:15,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:15,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:15,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:06:15,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 219 [2023-08-03 22:06:15,055 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) [2023-08-03 22:06:15,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:15,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 219 [2023-08-03 22:06:15,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:15,233 INFO L124 PetriNetUnfolderBase]: 1302/2284 cut-off events. [2023-08-03 22:06:15,233 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-08-03 22:06:15,236 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 13088 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. [2023-08-03 22:06:15,242 INFO L140 encePairwiseOnDemand]: 215/219 looper letters, 48 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-03 22:06:15,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 242 flow [2023-08-03 22:06:15,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:15,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:15,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 525 transitions. [2023-08-03 22:06:15,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993150684931506 [2023-08-03 22:06:15,244 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 525 transitions. [2023-08-03 22:06:15,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 525 transitions. [2023-08-03 22:06:15,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:15,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 525 transitions. [2023-08-03 22:06:15,245 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) [2023-08-03 22:06:15,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:15,247 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:15,247 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 92 flow. Second operand 4 states and 525 transitions. [2023-08-03 22:06:15,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 242 flow [2023-08-03 22:06:15,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:15,248 INFO L231 Difference]: Finished difference. Result has 48 places, 37 transitions, 104 flow [2023-08-03 22:06:15,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, 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} [2023-08-03 22:06:15,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 22:06:15,249 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 37 transitions, 104 flow [2023-08-03 22:06:15,249 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) [2023-08-03 22:06:15,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:15,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:15,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 22:06:15,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:15,454 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:15,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:15,454 INFO L85 PathProgramCache]: Analyzing trace with hash -248476754, now seen corresponding path program 1 times [2023-08-03 22:06:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053684016] [2023-08-03 22:06:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:15,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:15,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:15,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053684016] [2023-08-03 22:06:15,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053684016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:15,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:15,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 22:06:15,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566536534] [2023-08-03 22:06:15,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:15,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 22:06:15,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:15,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 22:06:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 22:06:15,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 219 [2023-08-03 22:06:15,576 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) [2023-08-03 22:06:15,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:15,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 219 [2023-08-03 22:06:15,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:15,736 INFO L124 PetriNetUnfolderBase]: 1318/2500 cut-off events. [2023-08-03 22:06:15,736 INFO L125 PetriNetUnfolderBase]: For 723/723 co-relation queries the response was YES. [2023-08-03 22:06:15,738 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 15164 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. [2023-08-03 22:06:15,744 INFO L140 encePairwiseOnDemand]: 215/219 looper letters, 47 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 22:06:15,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 266 flow [2023-08-03 22:06:15,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 22:06:15,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 22:06:15,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-08-03 22:06:15,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133942161339422 [2023-08-03 22:06:15,746 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-08-03 22:06:15,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-08-03 22:06:15,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:15,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-08-03 22:06:15,747 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) [2023-08-03 22:06:15,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:15,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 219.0) internal successors, (876), 4 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:15,748 INFO L175 Difference]: Start difference. First operand has 48 places, 37 transitions, 104 flow. Second operand 3 states and 403 transitions. [2023-08-03 22:06:15,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 266 flow [2023-08-03 22:06:15,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 57 transitions, 254 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 22:06:15,751 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 116 flow [2023-08-03 22:06:15,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, 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} [2023-08-03 22:06:15,754 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 22:06:15,754 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 116 flow [2023-08-03 22:06:15,755 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) [2023-08-03 22:06:15,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:15,755 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:15,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 22:06:15,755 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:15,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:15,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1732014369, now seen corresponding path program 1 times [2023-08-03 22:06:15,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:15,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680162554] [2023-08-03 22:06:15,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:15,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:15,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:15,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:15,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680162554] [2023-08-03 22:06:15,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680162554] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:15,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:15,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 22:06:15,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45847739] [2023-08-03 22:06:15,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:15,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 22:06:15,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:15,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 22:06:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 22:06:15,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 219 [2023-08-03 22:06:15,856 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) [2023-08-03 22:06:15,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:15,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 219 [2023-08-03 22:06:15,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:16,044 INFO L124 PetriNetUnfolderBase]: 1400/2630 cut-off events. [2023-08-03 22:06:16,045 INFO L125 PetriNetUnfolderBase]: For 655/655 co-relation queries the response was YES. [2023-08-03 22:06:16,048 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 16075 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. [2023-08-03 22:06:16,056 INFO L140 encePairwiseOnDemand]: 209/219 looper letters, 68 selfloop transitions, 14 changer transitions 0/89 dead transitions. [2023-08-03 22:06:16,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 89 transitions, 411 flow [2023-08-03 22:06:16,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 22:06:16,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 22:06:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 610 transitions. [2023-08-03 22:06:16,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570776255707762 [2023-08-03 22:06:16,058 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 610 transitions. [2023-08-03 22:06:16,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 610 transitions. [2023-08-03 22:06:16,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:16,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 610 transitions. [2023-08-03 22:06:16,059 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) [2023-08-03 22:06:16,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:16,061 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:16,061 INFO L175 Difference]: Start difference. First operand has 48 places, 39 transitions, 116 flow. Second operand 5 states and 610 transitions. [2023-08-03 22:06:16,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 89 transitions, 411 flow [2023-08-03 22:06:16,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 89 transitions, 406 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:16,065 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 211 flow [2023-08-03 22:06:16,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, 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} [2023-08-03 22:06:16,066 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-03 22:06:16,066 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 211 flow [2023-08-03 22:06:16,066 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) [2023-08-03 22:06:16,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:16,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:16,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 22:06:16,066 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:16,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:16,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1716550202, now seen corresponding path program 1 times [2023-08-03 22:06:16,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:16,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153561455] [2023-08-03 22:06:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:16,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:16,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153561455] [2023-08-03 22:06:16,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153561455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447738387] [2023-08-03 22:06:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:16,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:16,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:16,161 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:06:16,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 22:06:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:16,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 22:06:16,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:16,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:06:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:16,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447738387] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:06:16,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:06:16,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-03 22:06:16,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452004607] [2023-08-03 22:06:16,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:06:16,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 22:06:16,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 22:06:16,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-03 22:06:16,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 219 [2023-08-03 22:06:16,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 211 flow. Second operand has 9 states, 9 states have (on average 120.22222222222223) internal successors, (1082), 9 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:16,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:16,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 219 [2023-08-03 22:06:16,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:16,608 INFO L124 PetriNetUnfolderBase]: 1730/3251 cut-off events. [2023-08-03 22:06:16,608 INFO L125 PetriNetUnfolderBase]: For 2302/2302 co-relation queries the response was YES. [2023-08-03 22:06:16,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8090 conditions, 3251 events. 1730/3251 cut-off events. For 2302/2302 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 21374 event pairs, 406 based on Foata normal form. 40/3263 useless extension candidates. Maximal degree in co-relation 6709. Up to 1604 conditions per place. [2023-08-03 22:06:16,623 INFO L140 encePairwiseOnDemand]: 210/219 looper letters, 114 selfloop transitions, 17 changer transitions 0/138 dead transitions. [2023-08-03 22:06:16,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 138 transitions, 828 flow [2023-08-03 22:06:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 22:06:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 22:06:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 929 transitions. [2023-08-03 22:06:16,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060013046314416 [2023-08-03 22:06:16,625 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 929 transitions. [2023-08-03 22:06:16,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 929 transitions. [2023-08-03 22:06:16,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:16,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 929 transitions. [2023-08-03 22:06:16,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 132.71428571428572) internal successors, (929), 7 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:16,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:16,629 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:16,629 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 211 flow. Second operand 7 states and 929 transitions. [2023-08-03 22:06:16,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 138 transitions, 828 flow [2023-08-03 22:06:16,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 138 transitions, 828 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 22:06:16,635 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 341 flow [2023-08-03 22:06:16,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=341, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2023-08-03 22:06:16,635 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2023-08-03 22:06:16,635 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 341 flow [2023-08-03 22:06:16,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 120.22222222222223) internal successors, (1082), 9 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:16,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:16,636 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:16,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 22:06:16,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-08-03 22:06:16,842 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:16,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1016215203, now seen corresponding path program 1 times [2023-08-03 22:06:16,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:16,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675022656] [2023-08-03 22:06:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:16,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:16,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:16,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675022656] [2023-08-03 22:06:16,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675022656] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:16,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:16,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 22:06:16,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701119976] [2023-08-03 22:06:16,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:16,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:16,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:16,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:16,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 22:06:16,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 219 [2023-08-03 22:06:16,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 341 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) [2023-08-03 22:06:16,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:16,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 219 [2023-08-03 22:06:16,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:17,203 INFO L124 PetriNetUnfolderBase]: 1980/3671 cut-off events. [2023-08-03 22:06:17,203 INFO L125 PetriNetUnfolderBase]: For 5082/5082 co-relation queries the response was YES. [2023-08-03 22:06:17,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10925 conditions, 3671 events. 1980/3671 cut-off events. For 5082/5082 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 24582 event pairs, 679 based on Foata normal form. 20/3654 useless extension candidates. Maximal degree in co-relation 7919. Up to 2241 conditions per place. [2023-08-03 22:06:17,219 INFO L140 encePairwiseOnDemand]: 212/219 looper letters, 100 selfloop transitions, 18 changer transitions 0/125 dead transitions. [2023-08-03 22:06:17,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 125 transitions, 883 flow [2023-08-03 22:06:17,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 22:06:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 22:06:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 788 transitions. [2023-08-03 22:06:17,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5996955859969558 [2023-08-03 22:06:17,222 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 788 transitions. [2023-08-03 22:06:17,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 788 transitions. [2023-08-03 22:06:17,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:17,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 788 transitions. [2023-08-03 22:06:17,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.33333333333334) internal successors, (788), 6 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:17,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:17,226 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:17,226 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 341 flow. Second operand 6 states and 788 transitions. [2023-08-03 22:06:17,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 125 transitions, 883 flow [2023-08-03 22:06:17,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 125 transitions, 866 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:17,238 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 493 flow [2023-08-03 22:06:17,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=493, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2023-08-03 22:06:17,239 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2023-08-03 22:06:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 493 flow [2023-08-03 22:06:17,240 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) [2023-08-03 22:06:17,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:17,240 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 22:06:17,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:17,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash 341114405, now seen corresponding path program 1 times [2023-08-03 22:06:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:17,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747900545] [2023-08-03 22:06:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:17,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:17,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:17,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747900545] [2023-08-03 22:06:17,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747900545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121634413] [2023-08-03 22:06:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:17,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:17,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:17,339 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:06:17,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 22:06:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:17,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 22:06:17,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:17,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 22:06:17,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 22:06:17,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 22:06:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:17,573 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:06:17,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121634413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:17,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:06:17,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2023-08-03 22:06:17,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116588894] [2023-08-03 22:06:17,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:17,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:17,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:17,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:17,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-03 22:06:17,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 219 [2023-08-03 22:06:17,642 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) [2023-08-03 22:06:17,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:17,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 219 [2023-08-03 22:06:17,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:17,780 INFO L124 PetriNetUnfolderBase]: 773/1606 cut-off events. [2023-08-03 22:06:17,780 INFO L125 PetriNetUnfolderBase]: For 2269/2273 co-relation queries the response was YES. [2023-08-03 22:06:17,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4822 conditions, 1606 events. 773/1606 cut-off events. For 2269/2273 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 9097 event pairs, 304 based on Foata normal form. 342/1945 useless extension candidates. Maximal degree in co-relation 4609. Up to 902 conditions per place. [2023-08-03 22:06:17,785 INFO L140 encePairwiseOnDemand]: 205/219 looper letters, 59 selfloop transitions, 16 changer transitions 0/81 dead transitions. [2023-08-03 22:06:17,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 81 transitions, 593 flow [2023-08-03 22:06:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-08-03 22:06:17,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547945205479452 [2023-08-03 22:06:17,786 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-08-03 22:06:17,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-08-03 22:06:17,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:17,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-08-03 22:06:17,787 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) [2023-08-03 22:06:17,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:17,788 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:17,789 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 493 flow. Second operand 4 states and 486 transitions. [2023-08-03 22:06:17,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 81 transitions, 593 flow [2023-08-03 22:06:17,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 81 transitions, 558 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-03 22:06:17,795 INFO L231 Difference]: Finished difference. Result has 70 places, 61 transitions, 369 flow [2023-08-03 22:06:17,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=66, 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=369, PETRI_PLACES=70, PETRI_TRANSITIONS=61} [2023-08-03 22:06:17,796 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2023-08-03 22:06:17,796 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 61 transitions, 369 flow [2023-08-03 22:06:17,797 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) [2023-08-03 22:06:17,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:17,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:17,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 22:06:18,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:18,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:18,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:18,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1957598818, now seen corresponding path program 1 times [2023-08-03 22:06:18,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:18,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032395703] [2023-08-03 22:06:18,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:18,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:18,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:18,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032395703] [2023-08-03 22:06:18,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032395703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:18,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822057913] [2023-08-03 22:06:18,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:18,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:18,093 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:06:18,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 22:06:18,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:18,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-03 22:06:18,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:18,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:18,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:06:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822057913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:06:18,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:06:18,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-03 22:06:18,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775659514] [2023-08-03 22:06:18,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:06:18,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 22:06:18,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:18,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 22:06:18,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-03 22:06:18,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 219 [2023-08-03 22:06:18,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 61 transitions, 369 flow. Second operand has 9 states, 9 states have (on average 106.88888888888889) internal successors, (962), 9 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:18,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:18,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 219 [2023-08-03 22:06:18,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:18,660 INFO L124 PetriNetUnfolderBase]: 840/1850 cut-off events. [2023-08-03 22:06:18,660 INFO L125 PetriNetUnfolderBase]: For 2563/2566 co-relation queries the response was YES. [2023-08-03 22:06:18,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6107 conditions, 1850 events. 840/1850 cut-off events. For 2563/2566 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 11229 event pairs, 274 based on Foata normal form. 5/1853 useless extension candidates. Maximal degree in co-relation 5257. Up to 732 conditions per place. [2023-08-03 22:06:18,667 INFO L140 encePairwiseOnDemand]: 206/219 looper letters, 136 selfloop transitions, 29 changer transitions 0/175 dead transitions. [2023-08-03 22:06:18,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 175 transitions, 1228 flow [2023-08-03 22:06:18,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-03 22:06:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-03 22:06:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1702 transitions. [2023-08-03 22:06:18,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181126331811263 [2023-08-03 22:06:18,670 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1702 transitions. [2023-08-03 22:06:18,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1702 transitions. [2023-08-03 22:06:18,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:18,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1702 transitions. [2023-08-03 22:06:18,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 113.46666666666667) internal successors, (1702), 15 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:18,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:18,676 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 219.0) internal successors, (3504), 16 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:18,676 INFO L175 Difference]: Start difference. First operand has 70 places, 61 transitions, 369 flow. Second operand 15 states and 1702 transitions. [2023-08-03 22:06:18,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 175 transitions, 1228 flow [2023-08-03 22:06:18,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 175 transitions, 1227 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 22:06:18,682 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 557 flow [2023-08-03 22:06:18,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=557, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2023-08-03 22:06:18,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2023-08-03 22:06:18,683 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 557 flow [2023-08-03 22:06:18,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 106.88888888888889) internal successors, (962), 9 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:18,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:18,684 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:18,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 22:06:18,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:18,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:18,887 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:18,887 INFO L85 PathProgramCache]: Analyzing trace with hash -785312848, now seen corresponding path program 1 times [2023-08-03 22:06:18,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:18,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219563119] [2023-08-03 22:06:18,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:18,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:18,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:18,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:18,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219563119] [2023-08-03 22:06:18,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219563119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:18,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:18,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:06:18,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060280265] [2023-08-03 22:06:18,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:18,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:06:18,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:18,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:06:18,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:06:18,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 219 [2023-08-03 22:06:18,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 557 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) [2023-08-03 22:06:18,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:18,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 219 [2023-08-03 22:06:18,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:19,219 INFO L124 PetriNetUnfolderBase]: 833/1846 cut-off events. [2023-08-03 22:06:19,219 INFO L125 PetriNetUnfolderBase]: For 4248/4253 co-relation queries the response was YES. [2023-08-03 22:06:19,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6689 conditions, 1846 events. 833/1846 cut-off events. For 4248/4253 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11166 event pairs, 272 based on Foata normal form. 6/1851 useless extension candidates. Maximal degree in co-relation 6453. Up to 766 conditions per place. [2023-08-03 22:06:19,230 INFO L140 encePairwiseOnDemand]: 207/219 looper letters, 104 selfloop transitions, 27 changer transitions 0/141 dead transitions. [2023-08-03 22:06:19,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 1137 flow [2023-08-03 22:06:19,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 22:06:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 22:06:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1040 transitions. [2023-08-03 22:06:19,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276509386098427 [2023-08-03 22:06:19,232 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1040 transitions. [2023-08-03 22:06:19,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1040 transitions. [2023-08-03 22:06:19,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:19,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1040 transitions. [2023-08-03 22:06:19,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:19,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:19,236 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:19,236 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 557 flow. Second operand 9 states and 1040 transitions. [2023-08-03 22:06:19,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 1137 flow [2023-08-03 22:06:19,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1100 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-03 22:06:19,246 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 664 flow [2023-08-03 22:06:19,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=664, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2023-08-03 22:06:19,247 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2023-08-03 22:06:19,247 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 664 flow [2023-08-03 22:06:19,248 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) [2023-08-03 22:06:19,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:19,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:19,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 22:06:19,248 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:19,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash -409428212, now seen corresponding path program 1 times [2023-08-03 22:06:19,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:19,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757605983] [2023-08-03 22:06:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:19,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:19,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:19,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757605983] [2023-08-03 22:06:19,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757605983] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:19,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594654293] [2023-08-03 22:06:19,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:19,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:19,325 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:06:19,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 22:06:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:19,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-03 22:06:19,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:19,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:06:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:19,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594654293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:06:19,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:06:19,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2023-08-03 22:06:19,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097404231] [2023-08-03 22:06:19,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:06:19,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:06:19,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:19,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:06:19,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:06:19,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 219 [2023-08-03 22:06:19,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 664 flow. Second operand has 8 states, 8 states have (on average 117.375) internal successors, (939), 8 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:19,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:19,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 219 [2023-08-03 22:06:19,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:19,759 INFO L124 PetriNetUnfolderBase]: 831/1829 cut-off events. [2023-08-03 22:06:19,759 INFO L125 PetriNetUnfolderBase]: For 6023/6026 co-relation queries the response was YES. [2023-08-03 22:06:19,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6912 conditions, 1829 events. 831/1829 cut-off events. For 6023/6026 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 11107 event pairs, 291 based on Foata normal form. 11/1832 useless extension candidates. Maximal degree in co-relation 6665. Up to 1045 conditions per place. [2023-08-03 22:06:19,765 INFO L140 encePairwiseOnDemand]: 210/219 looper letters, 111 selfloop transitions, 18 changer transitions 0/139 dead transitions. [2023-08-03 22:06:19,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 139 transitions, 1209 flow [2023-08-03 22:06:19,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-03 22:06:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-03 22:06:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1005 transitions. [2023-08-03 22:06:19,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5736301369863014 [2023-08-03 22:06:19,767 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1005 transitions. [2023-08-03 22:06:19,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1005 transitions. [2023-08-03 22:06:19,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:19,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1005 transitions. [2023-08-03 22:06:19,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.625) internal successors, (1005), 8 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:19,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:19,771 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 219.0) internal successors, (1971), 9 states have internal predecessors, (1971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:19,771 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 664 flow. Second operand 8 states and 1005 transitions. [2023-08-03 22:06:19,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 139 transitions, 1209 flow [2023-08-03 22:06:19,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 139 transitions, 1155 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-03 22:06:19,780 INFO L231 Difference]: Finished difference. Result has 101 places, 84 transitions, 689 flow [2023-08-03 22:06:19,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=689, PETRI_PLACES=101, PETRI_TRANSITIONS=84} [2023-08-03 22:06:19,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2023-08-03 22:06:19,781 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 84 transitions, 689 flow [2023-08-03 22:06:19,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 117.375) internal successors, (939), 8 states have internal predecessors, (939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:19,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:19,781 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:19,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-03 22:06:19,986 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 [2023-08-03 22:06:19,986 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:19,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:19,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1789355961, now seen corresponding path program 1 times [2023-08-03 22:06:19,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:19,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361641642] [2023-08-03 22:06:19,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:19,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:20,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:20,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361641642] [2023-08-03 22:06:20,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361641642] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:20,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:20,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 22:06:20,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323080194] [2023-08-03 22:06:20,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:20,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 22:06:20,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:20,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 22:06:20,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-03 22:06:20,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 219 [2023-08-03 22:06:20,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 84 transitions, 689 flow. Second operand has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:20,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:20,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 219 [2023-08-03 22:06:20,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:20,339 INFO L124 PetriNetUnfolderBase]: 814/1798 cut-off events. [2023-08-03 22:06:20,339 INFO L125 PetriNetUnfolderBase]: For 5828/5833 co-relation queries the response was YES. [2023-08-03 22:06:20,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6851 conditions, 1798 events. 814/1798 cut-off events. For 5828/5833 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 10775 event pairs, 352 based on Foata normal form. 12/1807 useless extension candidates. Maximal degree in co-relation 6650. Up to 1039 conditions per place. [2023-08-03 22:06:20,348 INFO L140 encePairwiseOnDemand]: 211/219 looper letters, 96 selfloop transitions, 16 changer transitions 0/122 dead transitions. [2023-08-03 22:06:20,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 122 transitions, 1086 flow [2023-08-03 22:06:20,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 22:06:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 22:06:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 878 transitions. [2023-08-03 22:06:20,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727332028701891 [2023-08-03 22:06:20,350 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 878 transitions. [2023-08-03 22:06:20,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 878 transitions. [2023-08-03 22:06:20,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:20,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 878 transitions. [2023-08-03 22:06:20,352 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) [2023-08-03 22:06:20,354 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:20,354 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:20,354 INFO L175 Difference]: Start difference. First operand has 101 places, 84 transitions, 689 flow. Second operand 7 states and 878 transitions. [2023-08-03 22:06:20,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 122 transitions, 1086 flow [2023-08-03 22:06:20,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 122 transitions, 1046 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-03 22:06:20,365 INFO L231 Difference]: Finished difference. Result has 101 places, 83 transitions, 689 flow [2023-08-03 22:06:20,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=689, PETRI_PLACES=101, PETRI_TRANSITIONS=83} [2023-08-03 22:06:20,366 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2023-08-03 22:06:20,366 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 83 transitions, 689 flow [2023-08-03 22:06:20,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:20,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:20,367 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:20,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 22:06:20,367 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:20,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:20,367 INFO L85 PathProgramCache]: Analyzing trace with hash 510869133, now seen corresponding path program 1 times [2023-08-03 22:06:20,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:20,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137010463] [2023-08-03 22:06:20,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:20,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:20,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-03 22:06:20,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:20,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137010463] [2023-08-03 22:06:20,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137010463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:20,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:20,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 22:06:20,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036472573] [2023-08-03 22:06:20,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:20,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:06:20,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:20,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:06:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:06:20,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 219 [2023-08-03 22:06:20,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 83 transitions, 689 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) [2023-08-03 22:06:20,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:20,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 219 [2023-08-03 22:06:20,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:20,735 INFO L124 PetriNetUnfolderBase]: 223/638 cut-off events. [2023-08-03 22:06:20,735 INFO L125 PetriNetUnfolderBase]: For 2354/2354 co-relation queries the response was YES. [2023-08-03 22:06:20,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2802 conditions, 638 events. 223/638 cut-off events. For 2354/2354 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 3381 event pairs, 68 based on Foata normal form. 155/793 useless extension candidates. Maximal degree in co-relation 2485. Up to 483 conditions per place. [2023-08-03 22:06:20,737 INFO L140 encePairwiseOnDemand]: 213/219 looper letters, 74 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2023-08-03 22:06:20,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 89 transitions, 883 flow [2023-08-03 22:06:20,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:20,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:20,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 472 transitions. [2023-08-03 22:06:20,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388127853881278 [2023-08-03 22:06:20,740 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 472 transitions. [2023-08-03 22:06:20,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 472 transitions. [2023-08-03 22:06:20,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:20,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 472 transitions. [2023-08-03 22:06:20,741 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) [2023-08-03 22:06:20,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:20,742 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:20,742 INFO L175 Difference]: Start difference. First operand has 101 places, 83 transitions, 689 flow. Second operand 4 states and 472 transitions. [2023-08-03 22:06:20,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 89 transitions, 883 flow [2023-08-03 22:06:20,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 89 transitions, 852 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-03 22:06:20,749 INFO L231 Difference]: Finished difference. Result has 99 places, 74 transitions, 586 flow [2023-08-03 22:06:20,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=570, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=586, PETRI_PLACES=99, PETRI_TRANSITIONS=74} [2023-08-03 22:06:20,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 58 predicate places. [2023-08-03 22:06:20,750 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 74 transitions, 586 flow [2023-08-03 22:06:20,750 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) [2023-08-03 22:06:20,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:20,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:20,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 22:06:20,750 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:20,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:20,752 INFO L85 PathProgramCache]: Analyzing trace with hash 2083093223, now seen corresponding path program 1 times [2023-08-03 22:06:20,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:20,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883396812] [2023-08-03 22:06:20,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:20,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:20,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:20,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883396812] [2023-08-03 22:06:20,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883396812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:20,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:20,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 22:06:20,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009835063] [2023-08-03 22:06:20,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:20,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:06:20,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:20,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:06:20,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:06:20,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 219 [2023-08-03 22:06:20,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 74 transitions, 586 flow. Second operand has 8 states, 8 states have (on average 104.125) internal successors, (833), 8 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:20,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:20,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 219 [2023-08-03 22:06:20,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:21,143 INFO L124 PetriNetUnfolderBase]: 205/618 cut-off events. [2023-08-03 22:06:21,143 INFO L125 PetriNetUnfolderBase]: For 1994/1996 co-relation queries the response was YES. [2023-08-03 22:06:21,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 618 events. 205/618 cut-off events. For 1994/1996 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3263 event pairs, 61 based on Foata normal form. 13/629 useless extension candidates. Maximal degree in co-relation 2453. Up to 220 conditions per place. [2023-08-03 22:06:21,146 INFO L140 encePairwiseOnDemand]: 205/219 looper letters, 105 selfloop transitions, 32 changer transitions 1/148 dead transitions. [2023-08-03 22:06:21,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 148 transitions, 1290 flow [2023-08-03 22:06:21,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-03 22:06:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-03 22:06:21,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1747 transitions. [2023-08-03 22:06:21,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4985730593607306 [2023-08-03 22:06:21,149 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1747 transitions. [2023-08-03 22:06:21,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1747 transitions. [2023-08-03 22:06:21,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:21,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1747 transitions. [2023-08-03 22:06:21,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 109.1875) internal successors, (1747), 16 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 219.0) internal successors, (3723), 17 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,156 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 219.0) internal successors, (3723), 17 states have internal predecessors, (3723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,156 INFO L175 Difference]: Start difference. First operand has 99 places, 74 transitions, 586 flow. Second operand 16 states and 1747 transitions. [2023-08-03 22:06:21,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 148 transitions, 1290 flow [2023-08-03 22:06:21,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 148 transitions, 1259 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 22:06:21,163 INFO L231 Difference]: Finished difference. Result has 115 places, 81 transitions, 742 flow [2023-08-03 22:06:21,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=742, PETRI_PLACES=115, PETRI_TRANSITIONS=81} [2023-08-03 22:06:21,163 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 74 predicate places. [2023-08-03 22:06:21,163 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 81 transitions, 742 flow [2023-08-03 22:06:21,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.125) internal successors, (833), 8 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:21,164 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:21,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-03 22:06:21,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:21,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1584153734, now seen corresponding path program 1 times [2023-08-03 22:06:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786616388] [2023-08-03 22:06:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:21,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:21,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:21,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:21,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786616388] [2023-08-03 22:06:21,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786616388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:21,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:21,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 22:06:21,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309861340] [2023-08-03 22:06:21,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:21,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:06:21,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:21,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:06:21,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:06:21,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 219 [2023-08-03 22:06:21,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 81 transitions, 742 flow. Second operand has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:21,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 219 [2023-08-03 22:06:21,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:21,533 INFO L124 PetriNetUnfolderBase]: 204/619 cut-off events. [2023-08-03 22:06:21,533 INFO L125 PetriNetUnfolderBase]: For 2967/2974 co-relation queries the response was YES. [2023-08-03 22:06:21,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2968 conditions, 619 events. 204/619 cut-off events. For 2967/2974 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3285 event pairs, 57 based on Foata normal form. 18/636 useless extension candidates. Maximal degree in co-relation 2704. Up to 247 conditions per place. [2023-08-03 22:06:21,536 INFO L140 encePairwiseOnDemand]: 206/219 looper letters, 95 selfloop transitions, 33 changer transitions 1/139 dead transitions. [2023-08-03 22:06:21,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 139 transitions, 1356 flow [2023-08-03 22:06:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-03 22:06:21,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-03 22:06:21,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1531 transitions. [2023-08-03 22:06:21,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49934768427919113 [2023-08-03 22:06:21,539 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1531 transitions. [2023-08-03 22:06:21,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1531 transitions. [2023-08-03 22:06:21,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:21,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1531 transitions. [2023-08-03 22:06:21,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 109.35714285714286) internal successors, (1531), 14 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 219.0) internal successors, (3285), 15 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,545 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 219.0) internal successors, (3285), 15 states have internal predecessors, (3285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,545 INFO L175 Difference]: Start difference. First operand has 115 places, 81 transitions, 742 flow. Second operand 14 states and 1531 transitions. [2023-08-03 22:06:21,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 139 transitions, 1356 flow [2023-08-03 22:06:21,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 139 transitions, 1306 flow, removed 6 selfloop flow, removed 11 redundant places. [2023-08-03 22:06:21,553 INFO L231 Difference]: Finished difference. Result has 121 places, 88 transitions, 888 flow [2023-08-03 22:06:21,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=888, PETRI_PLACES=121, PETRI_TRANSITIONS=88} [2023-08-03 22:06:21,553 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2023-08-03 22:06:21,553 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 88 transitions, 888 flow [2023-08-03 22:06:21,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.0) internal successors, (832), 8 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:21,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:21,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:21,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-03 22:06:21,554 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:21,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1923665266, now seen corresponding path program 1 times [2023-08-03 22:06:21,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:21,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724805933] [2023-08-03 22:06:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:21,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:21,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:21,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:21,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:21,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724805933] [2023-08-03 22:06:21,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724805933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:21,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539428405] [2023-08-03 22:06:21,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:21,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:21,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:21,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:06:21,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 22:06:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:21,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-03 22:06:21,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:21,798 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-03 22:06:21,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 22:06:21,821 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 22:06:21,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 22:06:21,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-03 22:06:21,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:21,845 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 22:06:21,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539428405] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:21,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 22:06:21,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-08-03 22:06:21,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942803801] [2023-08-03 22:06:21,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:21,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 22:06:21,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:21,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 22:06:21,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-03 22:06:21,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 219 [2023-08-03 22:06:21,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 88 transitions, 888 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) [2023-08-03 22:06:21,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:21,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 219 [2023-08-03 22:06:21,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:22,024 INFO L124 PetriNetUnfolderBase]: 156/474 cut-off events. [2023-08-03 22:06:22,024 INFO L125 PetriNetUnfolderBase]: For 2205/2205 co-relation queries the response was YES. [2023-08-03 22:06:22,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2193 conditions, 474 events. 156/474 cut-off events. For 2205/2205 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2244 event pairs, 63 based on Foata normal form. 6/480 useless extension candidates. Maximal degree in co-relation 1990. Up to 293 conditions per place. [2023-08-03 22:06:22,026 INFO L140 encePairwiseOnDemand]: 207/219 looper letters, 58 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2023-08-03 22:06:22,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 85 transitions, 971 flow [2023-08-03 22:06:22,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 22:06:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 22:06:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 464 transitions. [2023-08-03 22:06:22,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296803652968036 [2023-08-03 22:06:22,028 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 464 transitions. [2023-08-03 22:06:22,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 464 transitions. [2023-08-03 22:06:22,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:22,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 464 transitions. [2023-08-03 22:06:22,029 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) [2023-08-03 22:06:22,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,030 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 219.0) internal successors, (1095), 5 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,030 INFO L175 Difference]: Start difference. First operand has 121 places, 88 transitions, 888 flow. Second operand 4 states and 464 transitions. [2023-08-03 22:06:22,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 85 transitions, 971 flow [2023-08-03 22:06:22,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 85 transitions, 879 flow, removed 16 selfloop flow, removed 12 redundant places. [2023-08-03 22:06:22,037 INFO L231 Difference]: Finished difference. Result has 110 places, 78 transitions, 730 flow [2023-08-03 22:06:22,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=730, PETRI_PLACES=110, PETRI_TRANSITIONS=78} [2023-08-03 22:06:22,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2023-08-03 22:06:22,037 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 78 transitions, 730 flow [2023-08-03 22:06:22,038 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) [2023-08-03 22:06:22,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:22,038 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] [2023-08-03 22:06:22,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 22:06:22,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 22:06:22,243 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:22,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:22,243 INFO L85 PathProgramCache]: Analyzing trace with hash -301442257, now seen corresponding path program 1 times [2023-08-03 22:06:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:22,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609610563] [2023-08-03 22:06:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:22,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:22,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:22,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609610563] [2023-08-03 22:06:22,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609610563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:22,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015409519] [2023-08-03 22:06:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:22,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:22,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:22,349 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:06:22,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 22:06:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:22,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-03 22:06:22,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:22,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:22,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:06:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:22,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015409519] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:06:22,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:06:22,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-08-03 22:06:22,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489459782] [2023-08-03 22:06:22,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:06:22,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:06:22,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:06:22,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:06:22,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 219 [2023-08-03 22:06:22,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 78 transitions, 730 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) [2023-08-03 22:06:22,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:22,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 219 [2023-08-03 22:06:22,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:22,681 INFO L124 PetriNetUnfolderBase]: 136/452 cut-off events. [2023-08-03 22:06:22,681 INFO L125 PetriNetUnfolderBase]: For 1855/1857 co-relation queries the response was YES. [2023-08-03 22:06:22,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2060 conditions, 452 events. 136/452 cut-off events. For 1855/1857 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2167 event pairs, 63 based on Foata normal form. 4/455 useless extension candidates. Maximal degree in co-relation 1885. Up to 194 conditions per place. [2023-08-03 22:06:22,683 INFO L140 encePairwiseOnDemand]: 211/219 looper letters, 84 selfloop transitions, 15 changer transitions 1/107 dead transitions. [2023-08-03 22:06:22,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 107 transitions, 1059 flow [2023-08-03 22:06:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 22:06:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 22:06:22,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-08-03 22:06:22,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5629484670580561 [2023-08-03 22:06:22,685 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-08-03 22:06:22,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-08-03 22:06:22,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:22,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-08-03 22:06:22,686 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) [2023-08-03 22:06:22,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,688 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 219.0) internal successors, (1752), 8 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:22,688 INFO L175 Difference]: Start difference. First operand has 110 places, 78 transitions, 730 flow. Second operand 7 states and 863 transitions. [2023-08-03 22:06:22,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 107 transitions, 1059 flow [2023-08-03 22:06:22,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 107 transitions, 1009 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 22:06:22,694 INFO L231 Difference]: Finished difference. Result has 113 places, 76 transitions, 681 flow [2023-08-03 22:06:22,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=651, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=681, PETRI_PLACES=113, PETRI_TRANSITIONS=76} [2023-08-03 22:06:22,694 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2023-08-03 22:06:22,694 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 76 transitions, 681 flow [2023-08-03 22:06:22,694 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) [2023-08-03 22:06:22,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:22,694 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] [2023-08-03 22:06:22,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 22:06:22,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:22,900 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:22,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:22,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1373955991, now seen corresponding path program 1 times [2023-08-03 22:06:22,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:22,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626679846] [2023-08-03 22:06:22,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:22,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:22,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:22,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626679846] [2023-08-03 22:06:22,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626679846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:22,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:22,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 22:06:22,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056799608] [2023-08-03 22:06:22,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:22,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-03 22:06:22,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:22,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-03 22:06:22,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-03 22:06:23,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 219 [2023-08-03 22:06:23,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 76 transitions, 681 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) [2023-08-03 22:06:23,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:23,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 219 [2023-08-03 22:06:23,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:23,125 INFO L124 PetriNetUnfolderBase]: 135/452 cut-off events. [2023-08-03 22:06:23,125 INFO L125 PetriNetUnfolderBase]: For 1611/1611 co-relation queries the response was YES. [2023-08-03 22:06:23,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1960 conditions, 452 events. 135/452 cut-off events. For 1611/1611 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2159 event pairs, 61 based on Foata normal form. 2/454 useless extension candidates. Maximal degree in co-relation 1793. Up to 226 conditions per place. [2023-08-03 22:06:23,127 INFO L140 encePairwiseOnDemand]: 212/219 looper letters, 73 selfloop transitions, 13 changer transitions 1/94 dead transitions. [2023-08-03 22:06:23,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 94 transitions, 918 flow [2023-08-03 22:06:23,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 22:06:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 22:06:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 740 transitions. [2023-08-03 22:06:23,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563165905631659 [2023-08-03 22:06:23,129 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 740 transitions. [2023-08-03 22:06:23,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 740 transitions. [2023-08-03 22:06:23,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:23,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 740 transitions. [2023-08-03 22:06:23,130 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) [2023-08-03 22:06:23,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,131 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 219.0) internal successors, (1533), 7 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,131 INFO L175 Difference]: Start difference. First operand has 113 places, 76 transitions, 681 flow. Second operand 6 states and 740 transitions. [2023-08-03 22:06:23,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 94 transitions, 918 flow [2023-08-03 22:06:23,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 94 transitions, 877 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-03 22:06:23,136 INFO L231 Difference]: Finished difference. Result has 111 places, 74 transitions, 630 flow [2023-08-03 22:06:23,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=630, PETRI_PLACES=111, PETRI_TRANSITIONS=74} [2023-08-03 22:06:23,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2023-08-03 22:06:23,137 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 74 transitions, 630 flow [2023-08-03 22:06:23,137 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) [2023-08-03 22:06:23,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:23,137 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] [2023-08-03 22:06:23,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-03 22:06:23,137 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:23,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:23,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1093054096, now seen corresponding path program 1 times [2023-08-03 22:06:23,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:23,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920426489] [2023-08-03 22:06:23,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:23,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:23,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:23,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:23,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920426489] [2023-08-03 22:06:23,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920426489] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 22:06:23,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866899434] [2023-08-03 22:06:23,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:23,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 22:06:23,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 22:06:23,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 22:06:23,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 22:06:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:23,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-03 22:06:23,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 22:06:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:23,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 22:06:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 22:06:23,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866899434] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 22:06:23,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 22:06:23,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-08-03 22:06:23,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605444555] [2023-08-03 22:06:23,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 22:06:23,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 22:06:23,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 22:06:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-08-03 22:06:23,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 219 [2023-08-03 22:06:23,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 74 transitions, 630 flow. Second operand has 13 states, 13 states have (on average 116.07692307692308) internal successors, (1509), 13 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:23,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 219 [2023-08-03 22:06:23,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:23,681 INFO L124 PetriNetUnfolderBase]: 135/450 cut-off events. [2023-08-03 22:06:23,681 INFO L125 PetriNetUnfolderBase]: For 1382/1382 co-relation queries the response was YES. [2023-08-03 22:06:23,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1912 conditions, 450 events. 135/450 cut-off events. For 1382/1382 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2134 event pairs, 45 based on Foata normal form. 1/451 useless extension candidates. Maximal degree in co-relation 1750. Up to 155 conditions per place. [2023-08-03 22:06:23,683 INFO L140 encePairwiseOnDemand]: 209/219 looper letters, 91 selfloop transitions, 21 changer transitions 2/121 dead transitions. [2023-08-03 22:06:23,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 121 transitions, 1122 flow [2023-08-03 22:06:23,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-03 22:06:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-03 22:06:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1203 transitions. [2023-08-03 22:06:23,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5493150684931507 [2023-08-03 22:06:23,685 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1203 transitions. [2023-08-03 22:06:23,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1203 transitions. [2023-08-03 22:06:23,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:23,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1203 transitions. [2023-08-03 22:06:23,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 120.3) internal successors, (1203), 10 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,689 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,689 INFO L175 Difference]: Start difference. First operand has 111 places, 74 transitions, 630 flow. Second operand 10 states and 1203 transitions. [2023-08-03 22:06:23,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 121 transitions, 1122 flow [2023-08-03 22:06:23,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 121 transitions, 1096 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 22:06:23,694 INFO L231 Difference]: Finished difference. Result has 116 places, 74 transitions, 659 flow [2023-08-03 22:06:23,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=659, PETRI_PLACES=116, PETRI_TRANSITIONS=74} [2023-08-03 22:06:23,695 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2023-08-03 22:06:23,695 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 74 transitions, 659 flow [2023-08-03 22:06:23,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 116.07692307692308) internal successors, (1509), 13 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:23,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:23,695 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] [2023-08-03 22:06:23,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 22:06:23,900 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 [2023-08-03 22:06:23,900 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:23,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:23,901 INFO L85 PathProgramCache]: Analyzing trace with hash -517926796, now seen corresponding path program 1 times [2023-08-03 22:06:23,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:23,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948175317] [2023-08-03 22:06:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:23,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:23,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948175317] [2023-08-03 22:06:23,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948175317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:23,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:23,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 22:06:23,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637523367] [2023-08-03 22:06:23,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:23,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:06:23,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:23,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:06:23,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:06:24,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 219 [2023-08-03 22:06:24,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 74 transitions, 659 flow. Second operand has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:24,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 219 [2023-08-03 22:06:24,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:24,185 INFO L124 PetriNetUnfolderBase]: 135/449 cut-off events. [2023-08-03 22:06:24,185 INFO L125 PetriNetUnfolderBase]: For 1455/1455 co-relation queries the response was YES. [2023-08-03 22:06:24,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1954 conditions, 449 events. 135/449 cut-off events. For 1455/1455 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2133 event pairs, 46 based on Foata normal form. 1/450 useless extension candidates. Maximal degree in co-relation 1783. Up to 158 conditions per place. [2023-08-03 22:06:24,187 INFO L140 encePairwiseOnDemand]: 209/219 looper letters, 87 selfloop transitions, 22 changer transitions 2/118 dead transitions. [2023-08-03 22:06:24,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 118 transitions, 1129 flow [2023-08-03 22:06:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-03 22:06:24,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-03 22:06:24,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1200 transitions. [2023-08-03 22:06:24,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2023-08-03 22:06:24,189 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1200 transitions. [2023-08-03 22:06:24,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1200 transitions. [2023-08-03 22:06:24,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:24,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1200 transitions. [2023-08-03 22:06:24,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 120.0) internal successors, (1200), 10 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,193 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 219.0) internal successors, (2409), 11 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,193 INFO L175 Difference]: Start difference. First operand has 116 places, 74 transitions, 659 flow. Second operand 10 states and 1200 transitions. [2023-08-03 22:06:24,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 118 transitions, 1129 flow [2023-08-03 22:06:24,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 118 transitions, 1076 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-03 22:06:24,198 INFO L231 Difference]: Finished difference. Result has 117 places, 74 transitions, 662 flow [2023-08-03 22:06:24,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=662, PETRI_PLACES=117, PETRI_TRANSITIONS=74} [2023-08-03 22:06:24,198 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2023-08-03 22:06:24,199 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 74 transitions, 662 flow [2023-08-03 22:06:24,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.5) internal successors, (916), 8 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:24,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:24,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-03 22:06:24,199 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:24,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:24,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1775973483, now seen corresponding path program 1 times [2023-08-03 22:06:24,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:24,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275875455] [2023-08-03 22:06:24,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:24,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:24,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:24,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275875455] [2023-08-03 22:06:24,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275875455] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:24,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:24,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 22:06:24,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346385741] [2023-08-03 22:06:24,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:24,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 22:06:24,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 22:06:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-03 22:06:24,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-08-03 22:06:24,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 74 transitions, 662 flow. Second operand has 9 states, 9 states have (on average 102.44444444444444) internal successors, (922), 9 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:24,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-08-03 22:06:24,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:24,599 INFO L124 PetriNetUnfolderBase]: 135/448 cut-off events. [2023-08-03 22:06:24,600 INFO L125 PetriNetUnfolderBase]: For 1474/1474 co-relation queries the response was YES. [2023-08-03 22:06:24,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1945 conditions, 448 events. 135/448 cut-off events. For 1474/1474 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2112 event pairs, 30 based on Foata normal form. 1/449 useless extension candidates. Maximal degree in co-relation 1785. Up to 110 conditions per place. [2023-08-03 22:06:24,602 INFO L140 encePairwiseOnDemand]: 204/219 looper letters, 96 selfloop transitions, 35 changer transitions 2/140 dead transitions. [2023-08-03 22:06:24,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 140 transitions, 1278 flow [2023-08-03 22:06:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-03 22:06:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-03 22:06:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2010 transitions. [2023-08-03 22:06:24,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830569574621485 [2023-08-03 22:06:24,604 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2010 transitions. [2023-08-03 22:06:24,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2010 transitions. [2023-08-03 22:06:24,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:24,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2010 transitions. [2023-08-03 22:06:24,607 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 105.78947368421052) internal successors, (2010), 19 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 219.0) internal successors, (4380), 20 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,610 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 219.0) internal successors, (4380), 20 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,610 INFO L175 Difference]: Start difference. First operand has 117 places, 74 transitions, 662 flow. Second operand 19 states and 2010 transitions. [2023-08-03 22:06:24,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 140 transitions, 1278 flow [2023-08-03 22:06:24,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 140 transitions, 1211 flow, removed 4 selfloop flow, removed 10 redundant places. [2023-08-03 22:06:24,616 INFO L231 Difference]: Finished difference. Result has 128 places, 78 transitions, 743 flow [2023-08-03 22:06:24,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=743, PETRI_PLACES=128, PETRI_TRANSITIONS=78} [2023-08-03 22:06:24,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2023-08-03 22:06:24,616 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 78 transitions, 743 flow [2023-08-03 22:06:24,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.44444444444444) internal successors, (922), 9 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:24,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 22:06:24,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-03 22:06:24,617 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:24,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:24,617 INFO L85 PathProgramCache]: Analyzing trace with hash 488561767, now seen corresponding path program 1 times [2023-08-03 22:06:24,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:24,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095094918] [2023-08-03 22:06:24,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:24,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:24,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:24,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095094918] [2023-08-03 22:06:24,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095094918] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:24,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:24,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 22:06:24,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201451914] [2023-08-03 22:06:24,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:24,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 22:06:24,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:24,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 22:06:24,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-08-03 22:06:24,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 219 [2023-08-03 22:06:24,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 78 transitions, 743 flow. Second operand has 9 states, 9 states have (on average 102.44444444444444) internal successors, (922), 9 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:24,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:24,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 219 [2023-08-03 22:06:24,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:25,004 INFO L124 PetriNetUnfolderBase]: 135/447 cut-off events. [2023-08-03 22:06:25,004 INFO L125 PetriNetUnfolderBase]: For 1743/1743 co-relation queries the response was YES. [2023-08-03 22:06:25,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1978 conditions, 447 events. 135/447 cut-off events. For 1743/1743 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2118 event pairs, 30 based on Foata normal form. 1/448 useless extension candidates. Maximal degree in co-relation 1811. Up to 116 conditions per place. [2023-08-03 22:06:25,006 INFO L140 encePairwiseOnDemand]: 204/219 looper letters, 92 selfloop transitions, 38 changer transitions 2/139 dead transitions. [2023-08-03 22:06:25,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 139 transitions, 1331 flow [2023-08-03 22:06:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-03 22:06:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-03 22:06:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2006 transitions. [2023-08-03 22:06:25,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48209565008411437 [2023-08-03 22:06:25,009 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2006 transitions. [2023-08-03 22:06:25,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2006 transitions. [2023-08-03 22:06:25,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:25,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2006 transitions. [2023-08-03 22:06:25,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 105.57894736842105) internal successors, (2006), 19 states have internal predecessors, (2006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 219.0) internal successors, (4380), 20 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,015 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 219.0) internal successors, (4380), 20 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,015 INFO L175 Difference]: Start difference. First operand has 128 places, 78 transitions, 743 flow. Second operand 19 states and 2006 transitions. [2023-08-03 22:06:25,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 139 transitions, 1331 flow [2023-08-03 22:06:25,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 139 transitions, 1234 flow, removed 5 selfloop flow, removed 20 redundant places. [2023-08-03 22:06:25,023 INFO L231 Difference]: Finished difference. Result has 129 places, 83 transitions, 809 flow [2023-08-03 22:06:25,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=809, PETRI_PLACES=129, PETRI_TRANSITIONS=83} [2023-08-03 22:06:25,023 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2023-08-03 22:06:25,023 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 83 transitions, 809 flow [2023-08-03 22:06:25,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 102.44444444444444) internal successors, (922), 9 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:25,024 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] [2023-08-03 22:06:25,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-03 22:06:25,024 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:25,024 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:25,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1409452478, now seen corresponding path program 1 times [2023-08-03 22:06:25,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:25,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489979557] [2023-08-03 22:06:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:25,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:25,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:25,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489979557] [2023-08-03 22:06:25,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489979557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:25,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:25,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 22:06:25,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314550631] [2023-08-03 22:06:25,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:25,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 22:06:25,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:25,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 22:06:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-03 22:06:25,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 219 [2023-08-03 22:06:25,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 83 transitions, 809 flow. Second operand has 9 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:25,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 219 [2023-08-03 22:06:25,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:25,384 INFO L124 PetriNetUnfolderBase]: 133/462 cut-off events. [2023-08-03 22:06:25,384 INFO L125 PetriNetUnfolderBase]: For 2045/2045 co-relation queries the response was YES. [2023-08-03 22:06:25,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2088 conditions, 462 events. 133/462 cut-off events. For 2045/2045 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2249 event pairs, 47 based on Foata normal form. 3/465 useless extension candidates. Maximal degree in co-relation 1906. Up to 166 conditions per place. [2023-08-03 22:06:25,386 INFO L140 encePairwiseOnDemand]: 207/219 looper letters, 97 selfloop transitions, 30 changer transitions 1/135 dead transitions. [2023-08-03 22:06:25,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 135 transitions, 1407 flow [2023-08-03 22:06:25,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 22:06:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 22:06:25,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1296 transitions. [2023-08-03 22:06:25,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379825653798257 [2023-08-03 22:06:25,388 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1296 transitions. [2023-08-03 22:06:25,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1296 transitions. [2023-08-03 22:06:25,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:25,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1296 transitions. [2023-08-03 22:06:25,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 117.81818181818181) internal successors, (1296), 11 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,392 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,393 INFO L175 Difference]: Start difference. First operand has 129 places, 83 transitions, 809 flow. Second operand 11 states and 1296 transitions. [2023-08-03 22:06:25,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 135 transitions, 1407 flow [2023-08-03 22:06:25,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 135 transitions, 1306 flow, removed 7 selfloop flow, removed 16 redundant places. [2023-08-03 22:06:25,400 INFO L231 Difference]: Finished difference. Result has 124 places, 85 transitions, 828 flow [2023-08-03 22:06:25,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=718, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=828, PETRI_PLACES=124, PETRI_TRANSITIONS=85} [2023-08-03 22:06:25,400 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2023-08-03 22:06:25,400 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 85 transitions, 828 flow [2023-08-03 22:06:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:25,401 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] [2023-08-03 22:06:25,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-03 22:06:25,401 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:25,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1159266539, now seen corresponding path program 1 times [2023-08-03 22:06:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774113360] [2023-08-03 22:06:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:25,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:25,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:25,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:25,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774113360] [2023-08-03 22:06:25,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774113360] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:25,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:25,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-03 22:06:25,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198618564] [2023-08-03 22:06:25,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:25,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-03 22:06:25,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:25,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-03 22:06:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-08-03 22:06:25,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 219 [2023-08-03 22:06:25,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 85 transitions, 828 flow. Second operand has 9 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:25,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 219 [2023-08-03 22:06:25,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:25,760 INFO L124 PetriNetUnfolderBase]: 132/458 cut-off events. [2023-08-03 22:06:25,760 INFO L125 PetriNetUnfolderBase]: For 1712/1712 co-relation queries the response was YES. [2023-08-03 22:06:25,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2027 conditions, 458 events. 132/458 cut-off events. For 1712/1712 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2219 event pairs, 46 based on Foata normal form. 3/461 useless extension candidates. Maximal degree in co-relation 1801. Up to 166 conditions per place. [2023-08-03 22:06:25,762 INFO L140 encePairwiseOnDemand]: 207/219 looper letters, 94 selfloop transitions, 32 changer transitions 1/134 dead transitions. [2023-08-03 22:06:25,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 134 transitions, 1359 flow [2023-08-03 22:06:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 22:06:25,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 22:06:25,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1294 transitions. [2023-08-03 22:06:25,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371523453715235 [2023-08-03 22:06:25,765 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1294 transitions. [2023-08-03 22:06:25,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1294 transitions. [2023-08-03 22:06:25,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:25,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1294 transitions. [2023-08-03 22:06:25,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 117.63636363636364) internal successors, (1294), 11 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,768 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,768 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 219.0) internal successors, (2628), 12 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,768 INFO L175 Difference]: Start difference. First operand has 124 places, 85 transitions, 828 flow. Second operand 11 states and 1294 transitions. [2023-08-03 22:06:25,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 134 transitions, 1359 flow [2023-08-03 22:06:25,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 1293 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-08-03 22:06:25,775 INFO L231 Difference]: Finished difference. Result has 121 places, 84 transitions, 803 flow [2023-08-03 22:06:25,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=803, PETRI_PLACES=121, PETRI_TRANSITIONS=84} [2023-08-03 22:06:25,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2023-08-03 22:06:25,776 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 84 transitions, 803 flow [2023-08-03 22:06:25,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.44444444444444) internal successors, (1012), 9 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:25,776 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] [2023-08-03 22:06:25,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-03 22:06:25,776 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:25,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:25,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1569126731, now seen corresponding path program 1 times [2023-08-03 22:06:25,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:25,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534749736] [2023-08-03 22:06:25,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:25,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:25,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534749736] [2023-08-03 22:06:25,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534749736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:25,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:25,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-03 22:06:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473590401] [2023-08-03 22:06:25,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:25,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 22:06:25,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 22:06:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-03 22:06:25,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 219 [2023-08-03 22:06:25,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 84 transitions, 803 flow. Second operand has 10 states, 10 states have (on average 100.4) internal successors, (1004), 10 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:25,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:25,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 219 [2023-08-03 22:06:25,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:26,225 INFO L124 PetriNetUnfolderBase]: 131/454 cut-off events. [2023-08-03 22:06:26,226 INFO L125 PetriNetUnfolderBase]: For 1547/1547 co-relation queries the response was YES. [2023-08-03 22:06:26,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1987 conditions, 454 events. 131/454 cut-off events. For 1547/1547 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2185 event pairs, 28 based on Foata normal form. 3/457 useless extension candidates. Maximal degree in co-relation 1781. Up to 104 conditions per place. [2023-08-03 22:06:26,228 INFO L140 encePairwiseOnDemand]: 204/219 looper letters, 97 selfloop transitions, 43 changer transitions 1/148 dead transitions. [2023-08-03 22:06:26,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 148 transitions, 1440 flow [2023-08-03 22:06:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-03 22:06:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-03 22:06:26,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2169 transitions. [2023-08-03 22:06:26,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47162426614481406 [2023-08-03 22:06:26,230 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2169 transitions. [2023-08-03 22:06:26,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2169 transitions. [2023-08-03 22:06:26,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:26,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2169 transitions. [2023-08-03 22:06:26,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 103.28571428571429) internal successors, (2169), 21 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,236 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,236 INFO L175 Difference]: Start difference. First operand has 121 places, 84 transitions, 803 flow. Second operand 21 states and 2169 transitions. [2023-08-03 22:06:26,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 148 transitions, 1440 flow [2023-08-03 22:06:26,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 148 transitions, 1380 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-08-03 22:06:26,242 INFO L231 Difference]: Finished difference. Result has 135 places, 88 transitions, 924 flow [2023-08-03 22:06:26,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=924, PETRI_PLACES=135, PETRI_TRANSITIONS=88} [2023-08-03 22:06:26,243 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2023-08-03 22:06:26,243 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 88 transitions, 924 flow [2023-08-03 22:06:26,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.4) internal successors, (1004), 10 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:26,244 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] [2023-08-03 22:06:26,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-03 22:06:26,244 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:26,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1658607928, now seen corresponding path program 1 times [2023-08-03 22:06:26,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:26,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430011969] [2023-08-03 22:06:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:26,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:26,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430011969] [2023-08-03 22:06:26,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430011969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:26,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:26,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-03 22:06:26,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175887562] [2023-08-03 22:06:26,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:26,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-03 22:06:26,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:26,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-03 22:06:26,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-03 22:06:26,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 219 [2023-08-03 22:06:26,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 88 transitions, 924 flow. Second operand has 10 states, 10 states have (on average 100.4) internal successors, (1004), 10 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:26,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 219 [2023-08-03 22:06:26,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:26,731 INFO L124 PetriNetUnfolderBase]: 130/450 cut-off events. [2023-08-03 22:06:26,732 INFO L125 PetriNetUnfolderBase]: For 1851/1851 co-relation queries the response was YES. [2023-08-03 22:06:26,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2030 conditions, 450 events. 130/450 cut-off events. For 1851/1851 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2168 event pairs, 27 based on Foata normal form. 3/453 useless extension candidates. Maximal degree in co-relation 1848. Up to 104 conditions per place. [2023-08-03 22:06:26,734 INFO L140 encePairwiseOnDemand]: 204/219 looper letters, 94 selfloop transitions, 45 changer transitions 1/147 dead transitions. [2023-08-03 22:06:26,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 147 transitions, 1485 flow [2023-08-03 22:06:26,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-03 22:06:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-03 22:06:26,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2166 transitions. [2023-08-03 22:06:26,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4709719504240052 [2023-08-03 22:06:26,737 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2166 transitions. [2023-08-03 22:06:26,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2166 transitions. [2023-08-03 22:06:26,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:26,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2166 transitions. [2023-08-03 22:06:26,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 103.14285714285714) internal successors, (2166), 21 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,743 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 219.0) internal successors, (4818), 22 states have internal predecessors, (4818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,743 INFO L175 Difference]: Start difference. First operand has 135 places, 88 transitions, 924 flow. Second operand 21 states and 2166 transitions. [2023-08-03 22:06:26,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 147 transitions, 1485 flow [2023-08-03 22:06:26,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 147 transitions, 1357 flow, removed 7 selfloop flow, removed 23 redundant places. [2023-08-03 22:06:26,750 INFO L231 Difference]: Finished difference. Result has 131 places, 88 transitions, 876 flow [2023-08-03 22:06:26,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=876, PETRI_PLACES=131, PETRI_TRANSITIONS=88} [2023-08-03 22:06:26,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2023-08-03 22:06:26,751 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 88 transitions, 876 flow [2023-08-03 22:06:26,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 100.4) internal successors, (1004), 10 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:26,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 22:06:26,751 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] [2023-08-03 22:06:26,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-03 22:06:26,751 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 22:06:26,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 22:06:26,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2063974730, now seen corresponding path program 1 times [2023-08-03 22:06:26,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 22:06:26,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044964738] [2023-08-03 22:06:26,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 22:06:26,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 22:06:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 22:06:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 22:06:26,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 22:06:26,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044964738] [2023-08-03 22:06:26,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044964738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 22:06:26,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 22:06:26,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-03 22:06:26,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117861846] [2023-08-03 22:06:26,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 22:06:26,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 22:06:26,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 22:06:26,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 22:06:26,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-08-03 22:06:26,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 219 [2023-08-03 22:06:26,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 88 transitions, 876 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) [2023-08-03 22:06:26,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 22:06:26,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 219 [2023-08-03 22:06:26,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 22:06:27,085 INFO L124 PetriNetUnfolderBase]: 128/445 cut-off events. [2023-08-03 22:06:27,086 INFO L125 PetriNetUnfolderBase]: For 1593/1595 co-relation queries the response was YES. [2023-08-03 22:06:27,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 445 events. 128/445 cut-off events. For 1593/1595 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2166 event pairs, 76 based on Foata normal form. 6/450 useless extension candidates. Maximal degree in co-relation 1588. Up to 248 conditions per place. [2023-08-03 22:06:27,087 INFO L140 encePairwiseOnDemand]: 208/219 looper letters, 0 selfloop transitions, 0 changer transitions 110/110 dead transitions. [2023-08-03 22:06:27,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 110 transitions, 1135 flow [2023-08-03 22:06:27,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-03 22:06:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-03 22:06:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1041 transitions. [2023-08-03 22:06:27,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528158295281583 [2023-08-03 22:06:27,089 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1041 transitions. [2023-08-03 22:06:27,089 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1041 transitions. [2023-08-03 22:06:27,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 22:06:27,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1041 transitions. [2023-08-03 22:06:27,090 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) [2023-08-03 22:06:27,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:27,091 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 219.0) internal successors, (2190), 10 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 22:06:27,091 INFO L175 Difference]: Start difference. First operand has 131 places, 88 transitions, 876 flow. Second operand 9 states and 1041 transitions. [2023-08-03 22:06:27,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 110 transitions, 1135 flow [2023-08-03 22:06:27,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 110 transitions, 1031 flow, removed 4 selfloop flow, removed 20 redundant places. [2023-08-03 22:06:27,096 INFO L231 Difference]: Finished difference. Result has 118 places, 0 transitions, 0 flow [2023-08-03 22:06:27,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=219, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=118, PETRI_TRANSITIONS=0} [2023-08-03 22:06:27,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2023-08-03 22:06:27,096 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 0 transitions, 0 flow [2023-08-03 22:06:27,096 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) [2023-08-03 22:06:27,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 22:06:27,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 22:06:27,097 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 22:06:27,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-03 22:06:27,097 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, 1] [2023-08-03 22:06:27,097 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (2/2) [2023-08-03 22:06:27,097 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 22:06:27,097 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 22:06:27,102 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 10:06:27 BasicIcfg [2023-08-03 22:06:27,102 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 22:06:27,102 INFO L158 Benchmark]: Toolchain (without parser) took 20707.69ms. Allocated memory was 385.9MB in the beginning and 838.9MB in the end (delta: 453.0MB). Free memory was 342.3MB in the beginning and 370.8MB in the end (delta: -28.5MB). Peak memory consumption was 424.9MB. Max. memory is 16.0GB. [2023-08-03 22:06:27,102 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 385.9MB. Free memory is still 343.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 22:06:27,103 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.00ms. Allocated memory is still 385.9MB. Free memory was 342.0MB in the beginning and 322.7MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 22:06:27,103 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.53ms. Allocated memory is still 385.9MB. Free memory was 322.7MB in the beginning and 320.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:06:27,103 INFO L158 Benchmark]: Boogie Preprocessor took 30.39ms. Allocated memory is still 385.9MB. Free memory was 320.5MB in the beginning and 318.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 22:06:27,103 INFO L158 Benchmark]: RCFGBuilder took 335.92ms. Allocated memory is still 385.9MB. Free memory was 318.9MB in the beginning and 303.5MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 22:06:27,103 INFO L158 Benchmark]: TraceAbstraction took 19993.99ms. Allocated memory was 385.9MB in the beginning and 838.9MB in the end (delta: 453.0MB). Free memory was 302.9MB in the beginning and 370.8MB in the end (delta: -67.9MB). Peak memory consumption was 387.1MB. Max. memory is 16.0GB. [2023-08-03 22:06:27,104 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 385.9MB. Free memory is still 343.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 299.00ms. Allocated memory is still 385.9MB. Free memory was 342.0MB in the beginning and 322.7MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 44.53ms. Allocated memory is still 385.9MB. Free memory was 322.7MB in the beginning and 320.5MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 30.39ms. Allocated memory is still 385.9MB. Free memory was 320.5MB in the beginning and 318.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 335.92ms. Allocated memory is still 385.9MB. Free memory was 318.9MB in the beginning and 303.5MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 19993.99ms. Allocated memory was 385.9MB in the beginning and 838.9MB in the end (delta: 453.0MB). Free memory was 302.9MB in the beginning and 370.8MB in the end (delta: -67.9MB). Peak memory consumption was 387.1MB. 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: 2.5s, 65 PlacesBefore, 8 PlacesAfterwards, 62 TransitionsBefore, 5 TransitionsAfterwards, 360 CoEnabledTransitionPairs, 6 FixpointIterations, 33 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 60 TotalNumberOfCompositions, 264 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 264, independent: 264, independent conditional: 0, independent unconditional: 264, 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: 199, independent: 199, independent conditional: 0, independent unconditional: 199, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 264, independent: 65, independent conditional: 0, independent unconditional: 65, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 199, unknown conditional: 0, unknown unconditional: 199] , 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: 1.9s, 86 PlacesBefore, 31 PlacesAfterwards, 81 TransitionsBefore, 26 TransitionsAfterwards, 1404 CoEnabledTransitionPairs, 6 FixpointIterations, 32 TrivialSequentialCompositions, 20 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 0 ChoiceCompositions, 58 TotalNumberOfCompositions, 4497 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1451, independent: 1216, independent conditional: 0, independent unconditional: 1216, dependent: 235, dependent conditional: 0, dependent unconditional: 235, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 648, independent: 611, independent conditional: 0, independent unconditional: 611, dependent: 37, dependent conditional: 0, dependent unconditional: 37, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1451, independent: 605, independent conditional: 0, independent unconditional: 605, dependent: 198, dependent conditional: 0, dependent unconditional: 198, unknown: 648, unknown conditional: 0, unknown unconditional: 648] , Statistics on independence cache: Total cache size (in pairs): 81, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 18, Negative conditional cache size: 0, Negative unconditional cache size: 18, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 114 PlacesBefore, 41 PlacesAfterwards, 112 TransitionsBefore, 37 TransitionsAfterwards, 3636 CoEnabledTransitionPairs, 7 FixpointIterations, 32 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 2 ChoiceCompositions, 84 TotalNumberOfCompositions, 12482 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3530, independent: 3153, independent conditional: 0, independent unconditional: 3153, dependent: 377, dependent conditional: 0, dependent unconditional: 377, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1758, independent: 1695, independent conditional: 0, independent unconditional: 1695, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3530, independent: 1458, independent conditional: 0, independent unconditional: 1458, dependent: 314, dependent conditional: 0, dependent unconditional: 314, unknown: 1758, unknown conditional: 0, unknown unconditional: 1758] , Statistics on independence cache: Total cache size (in pairs): 117, Positive cache size: 89, Positive conditional cache size: 0, Positive unconditional cache size: 89, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, 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 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: 2.6s, 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: 2.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 37 SdHoareTripleChecker+Valid, 0.1s 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, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 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, 0.1s InterpolantComputationTime, 8 NumberOfCodeBlocks, 8 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 19 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 5/5 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 4 procedures, 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: 14.7s, OverallIterations: 26, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3347 SdHoareTripleChecker+Valid, 3.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2786 mSDsluCounter, 2107 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1981 mSDsCounter, 288 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8593 IncrementalHoareTripleChecker+Invalid, 8881 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 288 mSolverCounterUnsat, 126 mSDtfsCounter, 8593 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 252 SyntacticMatches, 17 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=924occurred in iteration=24, InterpolantAutomatonStates: 253, 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, 2.5s InterpolantComputationTime, 755 NumberOfCodeBlocks, 755 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 833 ConstructedInterpolants, 0 QuantifiedInterpolants, 3063 SizeOfPredicates, 18 NumberOfNonLiveVariables, 1540 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 40 InterpolantComputations, 20 PerfectInterpolantSequences, 131/219 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! [2023-08-03 22:06:27,117 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...