/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:36:58,165 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:36:58,239 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:36:58,244 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:36:58,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:36:58,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:36:58,245 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:36:58,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:36:58,268 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:36:58,268 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:36:58,269 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:36:58,269 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:36:58,270 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:36:58,270 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:36:58,270 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:36:58,271 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:36:58,271 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:36:58,271 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:36:58,272 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:36:58,272 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:36:58,272 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:36:58,273 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:36:58,273 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:36:58,273 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:36:58,273 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:36:58,273 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:36:58,274 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:36:58,274 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:36:58,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:36:58,274 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:36:58,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:36:58,275 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:36:58,275 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:36:58,275 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:36:58,275 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:36:58,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:36:58,276 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:36:58,276 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:36:58,276 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:36:58,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:36:58,276 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:36:58,281 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:36:58,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:36:58,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:36:58,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:36:58,501 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:36:58,502 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:36:58,503 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i [2023-08-04 07:36:59,723 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:36:59,962 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:36:59,962 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i [2023-08-04 07:36:59,996 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4571513/48b7d9abc3614f14a3504d03b6aa5352/FLAGa3786593b [2023-08-04 07:37:00,014 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee4571513/48b7d9abc3614f14a3504d03b6aa5352 [2023-08-04 07:37:00,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:37:00,022 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:37:00,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:37:00,025 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:37:00,028 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:37:00,029 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,029 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74919cf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00, skipping insertion in model container [2023-08-04 07:37:00,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,087 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:37:00,522 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i[55202,55215] [2023-08-04 07:37:00,541 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:37:00,554 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:37:00,581 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-04 07:37:00,583 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [274] [2023-08-04 07:37:00,600 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_bigshot_s_bound2.i[55202,55215] [2023-08-04 07:37:00,615 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:37:00,665 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:37:00,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00 WrapperNode [2023-08-04 07:37:00,678 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:37:00,681 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:37:00,681 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:37:00,684 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:37:00,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,703 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,723 INFO L138 Inliner]: procedures = 323, calls = 33, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 107 [2023-08-04 07:37:00,723 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:37:00,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:37:00,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:37:00,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:37:00,732 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,741 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,744 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,746 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,747 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,749 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:37:00,750 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:37:00,750 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:37:00,750 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:37:00,751 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (1/1) ... [2023-08-04 07:37:00,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:37:00,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:00,782 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 07:37:00,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 07:37:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:37:00,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:37:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-08-04 07:37:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:37:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 07:37:00,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 07:37:00,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 07:37:00,826 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 07:37:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:37:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 07:37:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:37:00,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:37:00,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:37:00,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:37:00,829 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:37:00,966 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:37:00,968 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:37:01,137 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:37:01,143 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:37:01,143 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-04 07:37:01,145 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:37:01 BoogieIcfgContainer [2023-08-04 07:37:01,145 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:37:01,147 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:37:01,147 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:37:01,150 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:37:01,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:37:00" (1/3) ... [2023-08-04 07:37:01,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e72dc8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:37:01, skipping insertion in model container [2023-08-04 07:37:01,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:37:00" (2/3) ... [2023-08-04 07:37:01,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e72dc8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:37:01, skipping insertion in model container [2023-08-04 07:37:01,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:37:01" (3/3) ... [2023-08-04 07:37:01,157 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_bigshot_s_bound2.i [2023-08-04 07:37:01,162 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:37:01,168 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:37:01,169 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:37:01,169 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:37:01,228 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 07:37:01,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 117 transitions, 256 flow [2023-08-04 07:37:01,324 INFO L124 PetriNetUnfolderBase]: 31/262 cut-off events. [2023-08-04 07:37:01,324 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 07:37:01,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 262 events. 31/262 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 966 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2023-08-04 07:37:01,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 117 transitions, 256 flow [2023-08-04 07:37:01,336 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 115 transitions, 247 flow [2023-08-04 07:37:01,339 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:37:01,349 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 115 transitions, 247 flow [2023-08-04 07:37:01,352 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 115 transitions, 247 flow [2023-08-04 07:37:01,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 115 transitions, 247 flow [2023-08-04 07:37:01,406 INFO L124 PetriNetUnfolderBase]: 31/261 cut-off events. [2023-08-04 07:37:01,407 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 07:37:01,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277 conditions, 261 events. 31/261 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 960 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 134. Up to 8 conditions per place. [2023-08-04 07:37:01,411 INFO L119 LiptonReduction]: Number of co-enabled transitions 2544 [2023-08-04 07:37:03,966 INFO L134 LiptonReduction]: Checked pairs total: 4510 [2023-08-04 07:37:03,966 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-04 07:37:03,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:37:03,985 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;@17d3fc33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:37:03,985 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:37:03,989 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:37:03,990 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2023-08-04 07:37:03,990 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:37:03,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:03,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:37:03,991 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:03,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:03,996 INFO L85 PathProgramCache]: Analyzing trace with hash 265454232, now seen corresponding path program 1 times [2023-08-04 07:37:04,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:04,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799875128] [2023-08-04 07:37:04,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:04,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:04,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:37:04,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:04,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799875128] [2023-08-04 07:37:04,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799875128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:04,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:37:04,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:37:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783488352] [2023-08-04 07:37:04,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:04,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:04,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:37:04,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2023-08-04 07:37:04,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 34 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:04,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2023-08-04 07:37:04,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:04,405 INFO L124 PetriNetUnfolderBase]: 330/602 cut-off events. [2023-08-04 07:37:04,405 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-04 07:37:04,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1184 conditions, 602 events. 330/602 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2484 event pairs, 111 based on Foata normal form. 41/469 useless extension candidates. Maximal degree in co-relation 907. Up to 550 conditions per place. [2023-08-04 07:37:04,410 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 28 selfloop transitions, 2 changer transitions 4/36 dead transitions. [2023-08-04 07:37:04,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 155 flow [2023-08-04 07:37:04,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-04 07:37:04,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169753086419753 [2023-08-04 07:37:04,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-04 07:37:04,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-04 07:37:04,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:04,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-04 07:37:04,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,435 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,437 INFO L175 Difference]: Start difference. First operand has 32 places, 34 transitions, 85 flow. Second operand 3 states and 335 transitions. [2023-08-04 07:37:04,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 155 flow [2023-08-04 07:37:04,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:04,442 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 80 flow [2023-08-04 07:37:04,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-04 07:37:04,446 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-08-04 07:37:04,446 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 80 flow [2023-08-04 07:37:04,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:04,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:04,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:37:04,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:04,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:04,448 INFO L85 PathProgramCache]: Analyzing trace with hash 725784853, now seen corresponding path program 1 times [2023-08-04 07:37:04,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:04,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090195183] [2023-08-04 07:37:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:04,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:37:04,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:04,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090195183] [2023-08-04 07:37:04,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090195183] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:04,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491108468] [2023-08-04 07:37:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:04,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:04,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:04,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:04,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:37:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:04,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:37:04,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:04,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:37:04,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:37:04,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491108468] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:04,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:37:04,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:37:04,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859918568] [2023-08-04 07:37:04,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:04,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:04,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:04,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:04,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:04,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2023-08-04 07:37:04,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:04,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2023-08-04 07:37:04,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:04,738 INFO L124 PetriNetUnfolderBase]: 51/120 cut-off events. [2023-08-04 07:37:04,739 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:37:04,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 120 events. 51/120 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 296 event pairs, 25 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 207. Up to 101 conditions per place. [2023-08-04 07:37:04,741 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 27 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 07:37:04,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 142 flow [2023-08-04 07:37:04,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:04,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 331 transitions. [2023-08-04 07:37:04,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108024691358025 [2023-08-04 07:37:04,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 331 transitions. [2023-08-04 07:37:04,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 331 transitions. [2023-08-04 07:37:04,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:04,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 331 transitions. [2023-08-04 07:37:04,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,751 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,751 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 80 flow. Second operand 3 states and 331 transitions. [2023-08-04 07:37:04,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 142 flow [2023-08-04 07:37:04,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 136 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:37:04,753 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 78 flow [2023-08-04 07:37:04,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-04 07:37:04,754 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-08-04 07:37:04,754 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 78 flow [2023-08-04 07:37:04,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:04,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:04,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:04,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:04,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:04,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:04,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:04,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1557332027, now seen corresponding path program 1 times [2023-08-04 07:37:04,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:04,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958888939] [2023-08-04 07:37:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:04,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:37:05,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958888939] [2023-08-04 07:37:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958888939] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976911834] [2023-08-04 07:37:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:05,053 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:05,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:37:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:05,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:37:05,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:37:05,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:37:05,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976911834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:05,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:37:05,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:37:05,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979497422] [2023-08-04 07:37:05,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:05,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:05,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:05,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:05,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:05,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2023-08-04 07:37:05,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 78 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:05,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2023-08-04 07:37:05,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:05,219 INFO L124 PetriNetUnfolderBase]: 50/112 cut-off events. [2023-08-04 07:37:05,220 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:37:05,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 112 events. 50/112 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 256 event pairs, 8 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 186. Up to 103 conditions per place. [2023-08-04 07:37:05,220 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 30 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 07:37:05,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 35 transitions, 156 flow [2023-08-04 07:37:05,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:05,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-04 07:37:05,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154320987654321 [2023-08-04 07:37:05,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-04 07:37:05,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-04 07:37:05,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:05,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-04 07:37:05,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,228 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 78 flow. Second operand 3 states and 334 transitions. [2023-08-04 07:37:05,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 35 transitions, 156 flow [2023-08-04 07:37:05,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 35 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:37:05,231 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 82 flow [2023-08-04 07:37:05,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-04 07:37:05,232 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 0 predicate places. [2023-08-04 07:37:05,232 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 82 flow [2023-08-04 07:37:05,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:05,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:05,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:05,438 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,SelfDestructingSolverStorable2 [2023-08-04 07:37:05,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:05,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:05,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1104774850, now seen corresponding path program 1 times [2023-08-04 07:37:05,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:05,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43884535] [2023-08-04 07:37:05,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:37:05,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43884535] [2023-08-04 07:37:05,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43884535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:05,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735390579] [2023-08-04 07:37:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:05,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:05,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:05,510 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:05,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:37:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:05,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:37:05,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:05,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:37:05,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735390579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:05,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:37:05,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:37:05,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133909833] [2023-08-04 07:37:05,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:05,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:05,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:05,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:05,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:05,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 216 [2023-08-04 07:37:05,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:05,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 216 [2023-08-04 07:37:05,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:05,666 INFO L124 PetriNetUnfolderBase]: 31/83 cut-off events. [2023-08-04 07:37:05,666 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:37:05,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 83 events. 31/83 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 158 event pairs, 14 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 138. Up to 61 conditions per place. [2023-08-04 07:37:05,667 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 30 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 07:37:05,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 160 flow [2023-08-04 07:37:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:05,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-04 07:37:05,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5169753086419753 [2023-08-04 07:37:05,679 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-04 07:37:05,679 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-04 07:37:05,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:05,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-04 07:37:05,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,683 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,683 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 82 flow. Second operand 3 states and 335 transitions. [2023-08-04 07:37:05,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 160 flow [2023-08-04 07:37:05,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:37:05,685 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 88 flow [2023-08-04 07:37:05,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2023-08-04 07:37:05,685 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 1 predicate places. [2023-08-04 07:37:05,686 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 88 flow [2023-08-04 07:37:05,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:05,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:05,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:05,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:05,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:05,892 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:05,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:05,893 INFO L85 PathProgramCache]: Analyzing trace with hash -80655556, now seen corresponding path program 1 times [2023-08-04 07:37:05,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:05,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407815903] [2023-08-04 07:37:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:05,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:05,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:06,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:06,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:06,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407815903] [2023-08-04 07:37:06,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407815903] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:06,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686190235] [2023-08-04 07:37:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:06,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:06,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:06,019 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:06,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:37:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:06,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:37:06,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:06,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:06,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686190235] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:06,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:06,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:37:06,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630846722] [2023-08-04 07:37:06,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:06,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:37:06,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:06,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:37:06,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:06,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 216 [2023-08-04 07:37:06,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 88 flow. Second operand has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:06,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:06,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 216 [2023-08-04 07:37:06,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:06,219 INFO L124 PetriNetUnfolderBase]: 4/15 cut-off events. [2023-08-04 07:37:06,219 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:37:06,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 15 events. 4/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 0 based on Foata normal form. 3/18 useless extension candidates. Maximal degree in co-relation 34. Up to 10 conditions per place. [2023-08-04 07:37:06,220 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 07:37:06,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 9 transitions, 40 flow [2023-08-04 07:37:06,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:37:06,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:37:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 406 transitions. [2023-08-04 07:37:06,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4699074074074074 [2023-08-04 07:37:06,221 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 406 transitions. [2023-08-04 07:37:06,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 406 transitions. [2023-08-04 07:37:06,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:06,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 406 transitions. [2023-08-04 07:37:06,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:06,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:06,225 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:06,225 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 88 flow. Second operand 4 states and 406 transitions. [2023-08-04 07:37:06,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 17 places, 9 transitions, 40 flow [2023-08-04 07:37:06,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:06,226 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-04 07:37:06,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-04 07:37:06,229 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -16 predicate places. [2023-08-04 07:37:06,229 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-04 07:37:06,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:06,232 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:37:06,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 07:37:06,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:06,438 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:37:06,440 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:37:06,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 117 transitions, 256 flow [2023-08-04 07:37:06,464 INFO L124 PetriNetUnfolderBase]: 31/262 cut-off events. [2023-08-04 07:37:06,464 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 07:37:06,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 262 events. 31/262 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 966 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2023-08-04 07:37:06,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 117 transitions, 256 flow [2023-08-04 07:37:06,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 115 transitions, 246 flow [2023-08-04 07:37:06,466 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:37:06,466 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 115 transitions, 246 flow [2023-08-04 07:37:06,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 115 transitions, 246 flow [2023-08-04 07:37:06,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 115 transitions, 246 flow [2023-08-04 07:37:06,485 INFO L124 PetriNetUnfolderBase]: 29/256 cut-off events. [2023-08-04 07:37:06,486 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:37:06,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 256 events. 29/256 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 937 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 140. Up to 8 conditions per place. [2023-08-04 07:37:06,489 INFO L119 LiptonReduction]: Number of co-enabled transitions 2496 [2023-08-04 07:37:08,766 INFO L134 LiptonReduction]: Checked pairs total: 3987 [2023-08-04 07:37:08,766 INFO L136 LiptonReduction]: Total number of compositions: 100 [2023-08-04 07:37:08,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:37:08,769 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;@17d3fc33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:37:08,769 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:37:08,772 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:37:08,772 INFO L124 PetriNetUnfolderBase]: 1/25 cut-off events. [2023-08-04 07:37:08,772 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:37:08,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:08,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:37:08,772 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 07:37:08,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:08,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1064825712, now seen corresponding path program 1 times [2023-08-04 07:37:08,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:08,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262085919] [2023-08-04 07:37:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:08,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:37:08,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:37:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:37:08,833 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:37:08,833 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:37:08,834 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 07:37:08,836 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 07:37:08,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:37:08,837 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:37:08,838 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 07:37:08,839 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:37:08,839 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:37:08,877 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 07:37:08,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 147 transitions, 342 flow [2023-08-04 07:37:08,964 INFO L124 PetriNetUnfolderBase]: 122/892 cut-off events. [2023-08-04 07:37:08,964 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-04 07:37:08,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 968 conditions, 892 events. 122/892 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4819 event pairs, 0 based on Foata normal form. 0/750 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2023-08-04 07:37:08,969 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 147 transitions, 342 flow [2023-08-04 07:37:08,972 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 144 transitions, 326 flow [2023-08-04 07:37:08,972 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:37:08,973 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 135 places, 144 transitions, 326 flow [2023-08-04 07:37:08,973 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 135 places, 144 transitions, 326 flow [2023-08-04 07:37:08,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 144 transitions, 326 flow [2023-08-04 07:37:09,043 INFO L124 PetriNetUnfolderBase]: 122/891 cut-off events. [2023-08-04 07:37:09,044 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 07:37:09,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 965 conditions, 891 events. 122/891 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4804 event pairs, 0 based on Foata normal form. 0/749 useless extension candidates. Maximal degree in co-relation 524. Up to 32 conditions per place. [2023-08-04 07:37:09,064 INFO L119 LiptonReduction]: Number of co-enabled transitions 6624 [2023-08-04 07:37:11,808 INFO L134 LiptonReduction]: Checked pairs total: 13677 [2023-08-04 07:37:11,808 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-04 07:37:11,810 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:37:11,810 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;@17d3fc33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:37:11,810 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:37:11,813 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:37:11,813 INFO L124 PetriNetUnfolderBase]: 1/17 cut-off events. [2023-08-04 07:37:11,813 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:37:11,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:11,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:37:11,813 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:11,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:11,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1002814389, now seen corresponding path program 1 times [2023-08-04 07:37:11,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:11,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552141784] [2023-08-04 07:37:11,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:11,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:37:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552141784] [2023-08-04 07:37:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552141784] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:11,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:37:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:37:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635549035] [2023-08-04 07:37:11,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:11,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:37:11,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 07:37:11,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 51 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:11,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:11,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 07:37:11,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:13,303 INFO L124 PetriNetUnfolderBase]: 12730/18146 cut-off events. [2023-08-04 07:37:13,303 INFO L125 PetriNetUnfolderBase]: For 954/954 co-relation queries the response was YES. [2023-08-04 07:37:13,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35738 conditions, 18146 events. 12730/18146 cut-off events. For 954/954 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 98172 event pairs, 6710 based on Foata normal form. 1640/14894 useless extension candidates. Maximal degree in co-relation 12424. Up to 16851 conditions per place. [2023-08-04 07:37:13,416 INFO L140 encePairwiseOnDemand]: 260/265 looper letters, 42 selfloop transitions, 2 changer transitions 3/53 dead transitions. [2023-08-04 07:37:13,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 236 flow [2023-08-04 07:37:13,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:13,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:13,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-04 07:37:13,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257861635220126 [2023-08-04 07:37:13,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-04 07:37:13,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-04 07:37:13,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:13,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-04 07:37:13,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:13,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:13,422 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:13,423 INFO L175 Difference]: Start difference. First operand has 47 places, 51 transitions, 140 flow. Second operand 3 states and 418 transitions. [2023-08-04 07:37:13,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 236 flow [2023-08-04 07:37:13,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:13,427 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 135 flow [2023-08-04 07:37:13,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2023-08-04 07:37:13,428 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 07:37:13,428 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 135 flow [2023-08-04 07:37:13,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:13,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:13,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:13,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:37:13,429 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:13,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:13,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1400734552, now seen corresponding path program 1 times [2023-08-04 07:37:13,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:13,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328857881] [2023-08-04 07:37:13,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:13,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:13,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:37:13,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:13,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328857881] [2023-08-04 07:37:13,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328857881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:13,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002275438] [2023-08-04 07:37:13,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:13,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:13,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:13,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:13,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 07:37:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:13,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:37:13,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:37:13,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:37:13,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002275438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:13,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:37:13,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:37:13,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273364356] [2023-08-04 07:37:13,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:13,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:13,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:13,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:13,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:13,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 07:37:13,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:13,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:13,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 07:37:13,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:14,039 INFO L124 PetriNetUnfolderBase]: 3827/5740 cut-off events. [2023-08-04 07:37:14,039 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2023-08-04 07:37:14,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11310 conditions, 5740 events. 3827/5740 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28684 event pairs, 2404 based on Foata normal form. 0/4089 useless extension candidates. Maximal degree in co-relation 11276. Up to 5237 conditions per place. [2023-08-04 07:37:14,066 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 47 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 07:37:14,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 254 flow [2023-08-04 07:37:14,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:14,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-04 07:37:14,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257861635220126 [2023-08-04 07:37:14,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-04 07:37:14,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-04 07:37:14,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:14,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-04 07:37:14,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,071 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,071 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 135 flow. Second operand 3 states and 418 transitions. [2023-08-04 07:37:14,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 254 flow [2023-08-04 07:37:14,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:37:14,075 INFO L231 Difference]: Finished difference. Result has 47 places, 48 transitions, 143 flow [2023-08-04 07:37:14,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=47, PETRI_TRANSITIONS=48} [2023-08-04 07:37:14,075 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-04 07:37:14,075 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 48 transitions, 143 flow [2023-08-04 07:37:14,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:14,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:14,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:14,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:14,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:14,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1646529165, now seen corresponding path program 1 times [2023-08-04 07:37:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:14,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461325577] [2023-08-04 07:37:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:14,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:37:14,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:14,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461325577] [2023-08-04 07:37:14,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461325577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:14,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474377985] [2023-08-04 07:37:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:14,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:14,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:14,361 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:14,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 07:37:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:14,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:37:14,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:37:14,446 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:37:14,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474377985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:14,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:37:14,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:37:14,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468856274] [2023-08-04 07:37:14,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:14,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:14,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 07:37:14,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 48 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:14,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 07:37:14,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:14,890 INFO L124 PetriNetUnfolderBase]: 3820/5684 cut-off events. [2023-08-04 07:37:14,890 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-04 07:37:14,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11251 conditions, 5684 events. 3820/5684 cut-off events. For 257/257 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 27702 event pairs, 1561 based on Foata normal form. 0/4051 useless extension candidates. Maximal degree in co-relation 6278. Up to 5213 conditions per place. [2023-08-04 07:37:14,918 INFO L140 encePairwiseOnDemand]: 262/265 looper letters, 51 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 07:37:14,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 271 flow [2023-08-04 07:37:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-04 07:37:14,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529559748427673 [2023-08-04 07:37:14,920 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-04 07:37:14,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-04 07:37:14,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:14,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-04 07:37:14,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,922 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,922 INFO L175 Difference]: Start difference. First operand has 47 places, 48 transitions, 143 flow. Second operand 3 states and 421 transitions. [2023-08-04 07:37:14,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 271 flow [2023-08-04 07:37:14,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 59 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:14,925 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 153 flow [2023-08-04 07:37:14,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-04 07:37:14,925 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 2 predicate places. [2023-08-04 07:37:14,925 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 153 flow [2023-08-04 07:37:14,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:14,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:14,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:14,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:15,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:15,132 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:15,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:15,132 INFO L85 PathProgramCache]: Analyzing trace with hash 209768786, now seen corresponding path program 1 times [2023-08-04 07:37:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:15,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934910394] [2023-08-04 07:37:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:37:15,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:15,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934910394] [2023-08-04 07:37:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934910394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:15,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603741006] [2023-08-04 07:37:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:15,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:15,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:15,199 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:15,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 07:37:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:15,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:37:15,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:15,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:37:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603741006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:15,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:37:15,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:37:15,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658000417] [2023-08-04 07:37:15,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:15,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:15,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:15,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:15,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 265 [2023-08-04 07:37:15,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:15,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:15,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 265 [2023-08-04 07:37:15,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:15,665 INFO L124 PetriNetUnfolderBase]: 2987/4531 cut-off events. [2023-08-04 07:37:15,666 INFO L125 PetriNetUnfolderBase]: For 457/457 co-relation queries the response was YES. [2023-08-04 07:37:15,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9412 conditions, 4531 events. 2987/4531 cut-off events. For 457/457 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 21815 event pairs, 1305 based on Foata normal form. 0/3461 useless extension candidates. Maximal degree in co-relation 5530. Up to 2956 conditions per place. [2023-08-04 07:37:15,683 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 61 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-04 07:37:15,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 69 transitions, 329 flow [2023-08-04 07:37:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:15,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:15,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 431 transitions. [2023-08-04 07:37:15,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421383647798742 [2023-08-04 07:37:15,685 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 431 transitions. [2023-08-04 07:37:15,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 431 transitions. [2023-08-04 07:37:15,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:15,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 431 transitions. [2023-08-04 07:37:15,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:15,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:15,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:15,688 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 153 flow. Second operand 3 states and 431 transitions. [2023-08-04 07:37:15,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 69 transitions, 329 flow [2023-08-04 07:37:15,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 69 transitions, 327 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:15,690 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 165 flow [2023-08-04 07:37:15,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2023-08-04 07:37:15,690 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-08-04 07:37:15,691 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 165 flow [2023-08-04 07:37:15,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:15,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:15,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:15,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:15,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:15,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:15,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1264360581, now seen corresponding path program 1 times [2023-08-04 07:37:15,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:15,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263685431] [2023-08-04 07:37:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:15,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:15,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:15,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263685431] [2023-08-04 07:37:15,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263685431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:15,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080556316] [2023-08-04 07:37:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:15,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:15,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:15,949 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:15,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 07:37:16,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:16,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:37:16,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:16,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:16,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080556316] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:16,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:16,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:37:16,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701707282] [2023-08-04 07:37:16,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:16,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:37:16,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:16,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:37:16,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:16,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 07:37:16,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:16,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 07:37:16,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:16,409 INFO L124 PetriNetUnfolderBase]: 2982/4563 cut-off events. [2023-08-04 07:37:16,410 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2023-08-04 07:37:16,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9868 conditions, 4563 events. 2982/4563 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 22231 event pairs, 1264 based on Foata normal form. 3/3564 useless extension candidates. Maximal degree in co-relation 4136. Up to 4212 conditions per place. [2023-08-04 07:37:16,431 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 48 selfloop transitions, 3 changer transitions 1/58 dead transitions. [2023-08-04 07:37:16,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 58 transitions, 285 flow [2023-08-04 07:37:16,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:37:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:37:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 538 transitions. [2023-08-04 07:37:16,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075471698113208 [2023-08-04 07:37:16,434 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 538 transitions. [2023-08-04 07:37:16,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 538 transitions. [2023-08-04 07:37:16,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:16,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 538 transitions. [2023-08-04 07:37:16,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,437 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,437 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 165 flow. Second operand 4 states and 538 transitions. [2023-08-04 07:37:16,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 58 transitions, 285 flow [2023-08-04 07:37:16,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 58 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:16,444 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 177 flow [2023-08-04 07:37:16,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-04 07:37:16,445 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 8 predicate places. [2023-08-04 07:37:16,445 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 177 flow [2023-08-04 07:37:16,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.0) internal successors, (635), 5 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:16,446 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:16,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:16,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 07:37:16,652 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:16,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:16,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1450583965, now seen corresponding path program 1 times [2023-08-04 07:37:16,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:16,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801293490] [2023-08-04 07:37:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:16,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:37:16,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:16,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801293490] [2023-08-04 07:37:16,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801293490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:16,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141660485] [2023-08-04 07:37:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:16,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:16,710 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:16,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 07:37:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:16,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:37:16,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:37:16,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:37:16,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141660485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:16,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:16,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:37:16,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286124210] [2023-08-04 07:37:16,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:16,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:37:16,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:16,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:37:16,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:16,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 07:37:16,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:16,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 07:37:16,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:16,962 INFO L124 PetriNetUnfolderBase]: 340/614 cut-off events. [2023-08-04 07:37:16,962 INFO L125 PetriNetUnfolderBase]: For 225/225 co-relation queries the response was YES. [2023-08-04 07:37:16,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1392 conditions, 614 events. 340/614 cut-off events. For 225/225 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2021 event pairs, 179 based on Foata normal form. 6/494 useless extension candidates. Maximal degree in co-relation 1118. Up to 491 conditions per place. [2023-08-04 07:37:16,964 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 50 selfloop transitions, 3 changer transitions 1/60 dead transitions. [2023-08-04 07:37:16,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 305 flow [2023-08-04 07:37:16,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:37:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:37:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-08-04 07:37:16,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2023-08-04 07:37:16,967 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-08-04 07:37:16,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-08-04 07:37:16,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:16,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-08-04 07:37:16,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,970 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,970 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 177 flow. Second operand 4 states and 540 transitions. [2023-08-04 07:37:16,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 305 flow [2023-08-04 07:37:16,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 60 transitions, 296 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:37:16,973 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 174 flow [2023-08-04 07:37:16,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2023-08-04 07:37:16,973 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 10 predicate places. [2023-08-04 07:37:16,973 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 174 flow [2023-08-04 07:37:16,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.2) internal successors, (636), 5 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:16,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:16,974 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:16,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:17,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:17,179 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:17,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1246567582, now seen corresponding path program 1 times [2023-08-04 07:37:17,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:17,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717212387] [2023-08-04 07:37:17,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:17,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:37:17,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:17,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717212387] [2023-08-04 07:37:17,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717212387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:17,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:37:17,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 07:37:17,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400519712] [2023-08-04 07:37:17,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:17,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:37:17,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:17,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:37:17,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:37:17,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 265 [2023-08-04 07:37:17,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:17,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 265 [2023-08-04 07:37:17,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:17,445 INFO L124 PetriNetUnfolderBase]: 555/1035 cut-off events. [2023-08-04 07:37:17,445 INFO L125 PetriNetUnfolderBase]: For 394/394 co-relation queries the response was YES. [2023-08-04 07:37:17,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2336 conditions, 1035 events. 555/1035 cut-off events. For 394/394 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4403 event pairs, 329 based on Foata normal form. 0/853 useless extension candidates. Maximal degree in co-relation 1193. Up to 496 conditions per place. [2023-08-04 07:37:17,450 INFO L140 encePairwiseOnDemand]: 259/265 looper letters, 78 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-04 07:37:17,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 87 transitions, 497 flow [2023-08-04 07:37:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:37:17,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:37:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 557 transitions. [2023-08-04 07:37:17,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254716981132076 [2023-08-04 07:37:17,452 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 557 transitions. [2023-08-04 07:37:17,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 557 transitions. [2023-08-04 07:37:17,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:17,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 557 transitions. [2023-08-04 07:37:17,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.25) internal successors, (557), 4 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,455 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,455 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 174 flow. Second operand 4 states and 557 transitions. [2023-08-04 07:37:17,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 87 transitions, 497 flow [2023-08-04 07:37:17,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 87 transitions, 482 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 07:37:17,458 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 186 flow [2023-08-04 07:37:17,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-04 07:37:17,459 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2023-08-04 07:37:17,459 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 186 flow [2023-08-04 07:37:17,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 126.25) internal successors, (505), 4 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:17,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:17,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 07:37:17,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:17,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:17,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1264431400, now seen corresponding path program 2 times [2023-08-04 07:37:17,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:17,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168815044] [2023-08-04 07:37:17,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:17,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:17,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 07:37:17,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:17,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168815044] [2023-08-04 07:37:17,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168815044] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:17,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744764792] [2023-08-04 07:37:17,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:37:17,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:17,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:17,515 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:17,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 07:37:17,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-04 07:37:17,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:37:17,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 07:37:17,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:37:17,604 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:37:17,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744764792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:37:17,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:37:17,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 07:37:17,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635054828] [2023-08-04 07:37:17,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:37:17,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:37:17,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:17,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:37:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:17,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 265 [2023-08-04 07:37:17,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:17,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 265 [2023-08-04 07:37:17,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:17,746 INFO L124 PetriNetUnfolderBase]: 556/1048 cut-off events. [2023-08-04 07:37:17,747 INFO L125 PetriNetUnfolderBase]: For 421/421 co-relation queries the response was YES. [2023-08-04 07:37:17,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2469 conditions, 1048 events. 556/1048 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4471 event pairs, 373 based on Foata normal form. 9/937 useless extension candidates. Maximal degree in co-relation 1264. Up to 940 conditions per place. [2023-08-04 07:37:17,752 INFO L140 encePairwiseOnDemand]: 263/265 looper letters, 42 selfloop transitions, 0 changer transitions 11/59 dead transitions. [2023-08-04 07:37:17,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 59 transitions, 316 flow [2023-08-04 07:37:17,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 421 transitions. [2023-08-04 07:37:17,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.529559748427673 [2023-08-04 07:37:17,754 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 421 transitions. [2023-08-04 07:37:17,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 421 transitions. [2023-08-04 07:37:17,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:17,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 421 transitions. [2023-08-04 07:37:17,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 265.0) internal successors, (1060), 4 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,758 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 186 flow. Second operand 3 states and 421 transitions. [2023-08-04 07:37:17,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 59 transitions, 316 flow [2023-08-04 07:37:17,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 59 transitions, 312 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:37:17,761 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 178 flow [2023-08-04 07:37:17,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-08-04 07:37:17,761 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 13 predicate places. [2023-08-04 07:37:17,762 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 178 flow [2023-08-04 07:37:17,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:17,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:17,762 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:17,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:17,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 07:37:17,968 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:17,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1624319958, now seen corresponding path program 1 times [2023-08-04 07:37:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:17,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059045812] [2023-08-04 07:37:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:17,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:18,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 07:37:18,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:18,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059045812] [2023-08-04 07:37:18,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059045812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:18,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525230733] [2023-08-04 07:37:18,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:18,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:18,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:18,026 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:18,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 07:37:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:18,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:37:18,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:18,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:37:18,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:37:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525230733] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:18,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:18,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-08-04 07:37:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394813695] [2023-08-04 07:37:18,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:18,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-04 07:37:18,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:18,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-04 07:37:18,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 07:37:18,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 265 [2023-08-04 07:37:18,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:18,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:18,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 265 [2023-08-04 07:37:18,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:18,443 INFO L124 PetriNetUnfolderBase]: 471/901 cut-off events. [2023-08-04 07:37:18,444 INFO L125 PetriNetUnfolderBase]: For 281/281 co-relation queries the response was YES. [2023-08-04 07:37:18,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2110 conditions, 901 events. 471/901 cut-off events. For 281/281 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3769 event pairs, 35 based on Foata normal form. 63/853 useless extension candidates. Maximal degree in co-relation 2096. Up to 299 conditions per place. [2023-08-04 07:37:18,448 INFO L140 encePairwiseOnDemand]: 256/265 looper letters, 101 selfloop transitions, 10 changer transitions 2/119 dead transitions. [2023-08-04 07:37:18,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 119 transitions, 638 flow [2023-08-04 07:37:18,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 07:37:18,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 07:37:18,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1032 transitions. [2023-08-04 07:37:18,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4867924528301887 [2023-08-04 07:37:18,452 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1032 transitions. [2023-08-04 07:37:18,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1032 transitions. [2023-08-04 07:37:18,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:18,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1032 transitions. [2023-08-04 07:37:18,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 129.0) internal successors, (1032), 8 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:18,458 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:18,458 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 265.0) internal successors, (2385), 9 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:18,458 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 178 flow. Second operand 8 states and 1032 transitions. [2023-08-04 07:37:18,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 119 transitions, 638 flow [2023-08-04 07:37:18,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 119 transitions, 634 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:18,462 INFO L231 Difference]: Finished difference. Result has 69 places, 50 transitions, 231 flow [2023-08-04 07:37:18,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=231, PETRI_PLACES=69, PETRI_TRANSITIONS=50} [2023-08-04 07:37:18,463 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-08-04 07:37:18,463 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 50 transitions, 231 flow [2023-08-04 07:37:18,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 122.33333333333333) internal successors, (734), 6 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:18,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:18,464 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:18,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:18,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 07:37:18,670 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:18,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1148840420, now seen corresponding path program 1 times [2023-08-04 07:37:18,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:18,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245567532] [2023-08-04 07:37:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:18,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:37:18,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:18,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245567532] [2023-08-04 07:37:18,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245567532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:18,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540732933] [2023-08-04 07:37:18,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:18,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:18,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:18,734 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:18,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 07:37:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:18,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:37:18,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:37:18,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:37:18,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540732933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:18,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:18,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:37:18,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683297975] [2023-08-04 07:37:18,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:18,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:37:18,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:18,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:37:18,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:18,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 265 [2023-08-04 07:37:18,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 50 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:18,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:18,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 265 [2023-08-04 07:37:18,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:19,009 INFO L124 PetriNetUnfolderBase]: 359/718 cut-off events. [2023-08-04 07:37:19,009 INFO L125 PetriNetUnfolderBase]: For 843/843 co-relation queries the response was YES. [2023-08-04 07:37:19,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1940 conditions, 718 events. 359/718 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2817 event pairs, 143 based on Foata normal form. 16/650 useless extension candidates. Maximal degree in co-relation 1923. Up to 361 conditions per place. [2023-08-04 07:37:19,013 INFO L140 encePairwiseOnDemand]: 261/265 looper letters, 60 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 07:37:19,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 404 flow [2023-08-04 07:37:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:37:19,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:37:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 545 transitions. [2023-08-04 07:37:19,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5141509433962265 [2023-08-04 07:37:19,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 545 transitions. [2023-08-04 07:37:19,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 545 transitions. [2023-08-04 07:37:19,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:19,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 545 transitions. [2023-08-04 07:37:19,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.25) internal successors, (545), 4 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:19,018 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:19,018 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 265.0) internal successors, (1325), 5 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:19,018 INFO L175 Difference]: Start difference. First operand has 69 places, 50 transitions, 231 flow. Second operand 4 states and 545 transitions. [2023-08-04 07:37:19,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 404 flow [2023-08-04 07:37:19,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 390 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:37:19,021 INFO L231 Difference]: Finished difference. Result has 71 places, 50 transitions, 232 flow [2023-08-04 07:37:19,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=71, PETRI_TRANSITIONS=50} [2023-08-04 07:37:19,022 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 24 predicate places. [2023-08-04 07:37:19,022 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 50 transitions, 232 flow [2023-08-04 07:37:19,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.6) internal successors, (643), 5 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:19,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:19,022 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:19,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:19,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 07:37:19,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:19,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:19,229 INFO L85 PathProgramCache]: Analyzing trace with hash -513158531, now seen corresponding path program 1 times [2023-08-04 07:37:19,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:19,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829596240] [2023-08-04 07:37:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:19,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:19,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:37:19,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:19,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829596240] [2023-08-04 07:37:19,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829596240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:19,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750586795] [2023-08-04 07:37:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:19,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:19,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:19,877 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:19,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 07:37:19,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:19,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-04 07:37:19,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:20,031 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 07:37:20,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 07:37:20,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:20,079 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:20,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:20,179 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:37:20,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 07:37:20,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750586795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:20,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:20,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 7] total 18 [2023-08-04 07:37:20,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939138578] [2023-08-04 07:37:20,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:20,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-04 07:37:20,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:20,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-04 07:37:20,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=271, Unknown=1, NotChecked=0, Total=342 [2023-08-04 07:37:21,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 265 [2023-08-04 07:37:21,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 50 transitions, 232 flow. Second operand has 19 states, 19 states have (on average 84.94736842105263) internal successors, (1614), 19 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:21,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:21,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 265 [2023-08-04 07:37:21,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:22,451 INFO L124 PetriNetUnfolderBase]: 1675/2656 cut-off events. [2023-08-04 07:37:22,451 INFO L125 PetriNetUnfolderBase]: For 3769/3769 co-relation queries the response was YES. [2023-08-04 07:37:22,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7293 conditions, 2656 events. 1675/2656 cut-off events. For 3769/3769 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12775 event pairs, 180 based on Foata normal form. 0/2275 useless extension candidates. Maximal degree in co-relation 7275. Up to 559 conditions per place. [2023-08-04 07:37:22,469 INFO L140 encePairwiseOnDemand]: 254/265 looper letters, 258 selfloop transitions, 82 changer transitions 0/344 dead transitions. [2023-08-04 07:37:22,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 344 transitions, 2219 flow [2023-08-04 07:37:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-04 07:37:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-04 07:37:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2714 transitions. [2023-08-04 07:37:22,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34138364779874214 [2023-08-04 07:37:22,477 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2714 transitions. [2023-08-04 07:37:22,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2714 transitions. [2023-08-04 07:37:22,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:22,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2714 transitions. [2023-08-04 07:37:22,484 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 90.46666666666667) internal successors, (2714), 30 states have internal predecessors, (2714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:22,494 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 265.0) internal successors, (8215), 31 states have internal predecessors, (8215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:22,496 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 265.0) internal successors, (8215), 31 states have internal predecessors, (8215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:22,496 INFO L175 Difference]: Start difference. First operand has 71 places, 50 transitions, 232 flow. Second operand 30 states and 2714 transitions. [2023-08-04 07:37:22,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 344 transitions, 2219 flow [2023-08-04 07:37:22,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 344 transitions, 2158 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 07:37:22,504 INFO L231 Difference]: Finished difference. Result has 99 places, 137 transitions, 618 flow [2023-08-04 07:37:22,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=618, PETRI_PLACES=99, PETRI_TRANSITIONS=137} [2023-08-04 07:37:22,505 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 52 predicate places. [2023-08-04 07:37:22,505 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 137 transitions, 618 flow [2023-08-04 07:37:22,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 84.94736842105263) internal successors, (1614), 19 states have internal predecessors, (1614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:22,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:22,506 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:22,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:22,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 07:37:22,713 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:22,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash 255181649, now seen corresponding path program 2 times [2023-08-04 07:37:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:22,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862682318] [2023-08-04 07:37:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:22,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:37:23,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:23,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862682318] [2023-08-04 07:37:23,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862682318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:23,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806692085] [2023-08-04 07:37:23,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:37:23,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:23,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:23,360 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:23,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 07:37:23,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:37:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:37:23,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-04 07:37:23,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:23,511 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 07:37:23,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 07:37:23,526 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:23,547 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:23,606 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:23,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:37:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:37:23,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:37:23,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806692085] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:23,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:23,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 19 [2023-08-04 07:37:23,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92562897] [2023-08-04 07:37:23,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:23,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-04 07:37:23,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:23,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-04 07:37:23,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=304, Unknown=1, NotChecked=0, Total=380 [2023-08-04 07:37:24,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 265 [2023-08-04 07:37:24,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 137 transitions, 618 flow. Second operand has 20 states, 20 states have (on average 81.25) internal successors, (1625), 20 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:24,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:24,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 265 [2023-08-04 07:37:24,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:26,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 07:37:29,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-04 07:37:29,940 INFO L124 PetriNetUnfolderBase]: 3797/5733 cut-off events. [2023-08-04 07:37:29,940 INFO L125 PetriNetUnfolderBase]: For 6990/6990 co-relation queries the response was YES. [2023-08-04 07:37:29,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18730 conditions, 5733 events. 3797/5733 cut-off events. For 6990/6990 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29960 event pairs, 386 based on Foata normal form. 40/4842 useless extension candidates. Maximal degree in co-relation 18711. Up to 1579 conditions per place. [2023-08-04 07:37:29,973 INFO L140 encePairwiseOnDemand]: 253/265 looper letters, 348 selfloop transitions, 237 changer transitions 0/589 dead transitions. [2023-08-04 07:37:29,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 589 transitions, 3950 flow [2023-08-04 07:37:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-04 07:37:29,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-04 07:37:29,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2657 transitions. [2023-08-04 07:37:29,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3234327449786975 [2023-08-04 07:37:29,980 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2657 transitions. [2023-08-04 07:37:29,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2657 transitions. [2023-08-04 07:37:29,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:29,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2657 transitions. [2023-08-04 07:37:29,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 85.70967741935483) internal successors, (2657), 31 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:29,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 265.0) internal successors, (8480), 32 states have internal predecessors, (8480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:29,996 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 265.0) internal successors, (8480), 32 states have internal predecessors, (8480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:29,997 INFO L175 Difference]: Start difference. First operand has 99 places, 137 transitions, 618 flow. Second operand 31 states and 2657 transitions. [2023-08-04 07:37:29,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 589 transitions, 3950 flow [2023-08-04 07:37:30,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 589 transitions, 3942 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:30,020 INFO L231 Difference]: Finished difference. Result has 136 places, 331 transitions, 2205 flow [2023-08-04 07:37:30,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2205, PETRI_PLACES=136, PETRI_TRANSITIONS=331} [2023-08-04 07:37:30,021 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 89 predicate places. [2023-08-04 07:37:30,021 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 331 transitions, 2205 flow [2023-08-04 07:37:30,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 81.25) internal successors, (1625), 20 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:30,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:30,023 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:30,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:30,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:30,229 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:30,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:30,229 INFO L85 PathProgramCache]: Analyzing trace with hash -911928155, now seen corresponding path program 1 times [2023-08-04 07:37:30,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:30,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266571943] [2023-08-04 07:37:30,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:30,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-04 07:37:30,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:30,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266571943] [2023-08-04 07:37:30,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266571943] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:30,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103281590] [2023-08-04 07:37:30,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:30,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:30,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:30,902 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:30,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 07:37:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:31,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-04 07:37:31,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:31,208 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:37:31,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2023-08-04 07:37:31,257 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:37:31,257 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-08-04 07:37:31,326 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:37:31,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2023-08-04 07:37:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:37:31,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:31,530 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 07:37:31,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 209 [2023-08-04 07:37:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:37:31,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103281590] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:31,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:31,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 25 [2023-08-04 07:37:31,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725291794] [2023-08-04 07:37:31,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:31,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-04 07:37:31,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:31,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-04 07:37:31,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2023-08-04 07:37:34,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 265 [2023-08-04 07:37:34,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 331 transitions, 2205 flow. Second operand has 25 states, 25 states have (on average 95.0) internal successors, (2375), 25 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:34,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:34,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 265 [2023-08-04 07:37:34,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:41,534 INFO L124 PetriNetUnfolderBase]: 6987/10525 cut-off events. [2023-08-04 07:37:41,535 INFO L125 PetriNetUnfolderBase]: For 21391/21391 co-relation queries the response was YES. [2023-08-04 07:37:41,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44200 conditions, 10525 events. 6987/10525 cut-off events. For 21391/21391 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 61157 event pairs, 588 based on Foata normal form. 355/10837 useless extension candidates. Maximal degree in co-relation 44173. Up to 1846 conditions per place. [2023-08-04 07:37:41,595 INFO L140 encePairwiseOnDemand]: 252/265 looper letters, 719 selfloop transitions, 914 changer transitions 0/1637 dead transitions. [2023-08-04 07:37:41,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 1637 transitions, 14144 flow [2023-08-04 07:37:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-04 07:37:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-04 07:37:41,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 9629 transitions. [2023-08-04 07:37:41,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37459638202684303 [2023-08-04 07:37:41,611 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 9629 transitions. [2023-08-04 07:37:41,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 9629 transitions. [2023-08-04 07:37:41,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:41,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 9629 transitions. [2023-08-04 07:37:41,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 99.26804123711341) internal successors, (9629), 97 states have internal predecessors, (9629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:41,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 265.0) internal successors, (25970), 98 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:41,669 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 265.0) internal successors, (25970), 98 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:41,669 INFO L175 Difference]: Start difference. First operand has 136 places, 331 transitions, 2205 flow. Second operand 97 states and 9629 transitions. [2023-08-04 07:37:41,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 1637 transitions, 14144 flow [2023-08-04 07:37:42,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 1637 transitions, 14134 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 07:37:42,076 INFO L231 Difference]: Finished difference. Result has 270 places, 1113 transitions, 11076 flow [2023-08-04 07:37:42,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=2110, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=11076, PETRI_PLACES=270, PETRI_TRANSITIONS=1113} [2023-08-04 07:37:42,077 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 223 predicate places. [2023-08-04 07:37:42,077 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 1113 transitions, 11076 flow [2023-08-04 07:37:42,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.0) internal successors, (2375), 25 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:42,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:42,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:42,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 07:37:42,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:42,283 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:42,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:42,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1558798095, now seen corresponding path program 2 times [2023-08-04 07:37:42,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:42,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146113290] [2023-08-04 07:37:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:42,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 07:37:42,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:42,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146113290] [2023-08-04 07:37:42,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146113290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:42,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218552587] [2023-08-04 07:37:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:37:42,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:42,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:42,710 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:42,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 07:37:42,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:37:42,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:37:42,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-04 07:37:42,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:42,999 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:37:42,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2023-08-04 07:37:43,044 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:37:43,045 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2023-08-04 07:37:43,110 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-08-04 07:37:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:37:43,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:43,313 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 07:37:43,313 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 103 [2023-08-04 07:37:43,461 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:37:43,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218552587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:43,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:43,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 11] total 25 [2023-08-04 07:37:43,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838017059] [2023-08-04 07:37:43,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:43,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-04 07:37:43,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:43,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-04 07:37:43,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-08-04 07:37:45,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 265 [2023-08-04 07:37:45,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 1113 transitions, 11076 flow. Second operand has 25 states, 25 states have (on average 95.36) internal successors, (2384), 25 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:45,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:45,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 265 [2023-08-04 07:37:45,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:55,335 INFO L124 PetriNetUnfolderBase]: 11675/17363 cut-off events. [2023-08-04 07:37:55,336 INFO L125 PetriNetUnfolderBase]: For 156183/156183 co-relation queries the response was YES. [2023-08-04 07:37:55,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104445 conditions, 17363 events. 11675/17363 cut-off events. For 156183/156183 co-relation queries the response was YES. Maximal size of possible extension queue 891. Compared 108243 event pairs, 951 based on Foata normal form. 352/17713 useless extension candidates. Maximal degree in co-relation 104377. Up to 3511 conditions per place. [2023-08-04 07:37:55,466 INFO L140 encePairwiseOnDemand]: 252/265 looper letters, 1003 selfloop transitions, 1560 changer transitions 0/2567 dead transitions. [2023-08-04 07:37:55,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 2567 transitions, 30134 flow [2023-08-04 07:37:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-08-04 07:37:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2023-08-04 07:37:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 9619 transitions. [2023-08-04 07:37:55,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37420735265512545 [2023-08-04 07:37:55,479 INFO L72 ComplementDD]: Start complementDD. Operand 97 states and 9619 transitions. [2023-08-04 07:37:55,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 9619 transitions. [2023-08-04 07:37:55,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:55,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 97 states and 9619 transitions. [2023-08-04 07:37:55,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 98 states, 97 states have (on average 99.16494845360825) internal successors, (9619), 97 states have internal predecessors, (9619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:55,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 98 states, 98 states have (on average 265.0) internal successors, (25970), 98 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:55,524 INFO L81 ComplementDD]: Finished complementDD. Result has 98 states, 98 states have (on average 265.0) internal successors, (25970), 98 states have internal predecessors, (25970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:55,525 INFO L175 Difference]: Start difference. First operand has 270 places, 1113 transitions, 11076 flow. Second operand 97 states and 9619 transitions. [2023-08-04 07:37:55,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 2567 transitions, 30134 flow [2023-08-04 07:37:59,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 2567 transitions, 29403 flow, removed 321 selfloop flow, removed 9 redundant places. [2023-08-04 07:37:59,104 INFO L231 Difference]: Finished difference. Result has 395 places, 1968 transitions, 24615 flow [2023-08-04 07:37:59,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=10616, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=773, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=97, PETRI_FLOW=24615, PETRI_PLACES=395, PETRI_TRANSITIONS=1968} [2023-08-04 07:37:59,106 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 348 predicate places. [2023-08-04 07:37:59,106 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1968 transitions, 24615 flow [2023-08-04 07:37:59,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 95.36) internal successors, (2384), 25 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:59,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:59,107 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:59,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 07:37:59,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:59,315 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:59,316 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:59,316 INFO L85 PathProgramCache]: Analyzing trace with hash -930420934, now seen corresponding path program 1 times [2023-08-04 07:37:59,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:59,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237175638] [2023-08-04 07:37:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:59,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:38:00,104 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:38:00,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:38:00,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237175638] [2023-08-04 07:38:00,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237175638] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:38:00,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133869020] [2023-08-04 07:38:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:38:00,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:38:00,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:38:00,109 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:38:00,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 07:38:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:38:00,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-04 07:38:00,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:38:00,277 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 07:38:00,278 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 07:38:00,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:38:00,331 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:38:00,473 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:38:00,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:38:00,692 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:38:00,693 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:38:00,898 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 07:38:00,899 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 07:38:00,986 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:38:00,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:38:01,082 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:38:01,082 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:38:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:38:01,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:38:01,985 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_559 (Array Int Int)) (~v~0.base Int)) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_559))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) c_~v~0.offset (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-04 07:38:02,017 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_559 (Array Int Int)) (~v~0.base Int)) (= 66 (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_559))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) |c_thread1Thread2of2ForFork0_#t~malloc3.offset| (select (select .cse0 3) 0)))) 3) 0))) is different from false [2023-08-04 07:38:02,037 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_559 (Array Int Int)) (~v~0.base Int)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_559))) (store .cse0 ~v~0.base (store (select .cse0 ~v~0.base) 0 (select (select .cse0 3) 0)))) 3) 0) 66)) is different from false [2023-08-04 07:38:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 14 not checked. [2023-08-04 07:38:02,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133869020] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:38:02,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:38:02,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 37 [2023-08-04 07:38:02,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624887650] [2023-08-04 07:38:02,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:38:02,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-04 07:38:02,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:38:02,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-04 07:38:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1057, Unknown=3, NotChecked=204, Total=1406 [2023-08-04 07:38:02,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 265 [2023-08-04 07:38:02,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1968 transitions, 24615 flow. Second operand has 38 states, 38 states have (on average 70.44736842105263) internal successors, (2677), 38 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:38:02,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:38:02,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 265 [2023-08-04 07:38:02,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:39:12,530 INFO L124 PetriNetUnfolderBase]: 19441/28807 cut-off events. [2023-08-04 07:39:12,530 INFO L125 PetriNetUnfolderBase]: For 664516/664516 co-relation queries the response was YES. [2023-08-04 07:39:13,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216796 conditions, 28807 events. 19441/28807 cut-off events. For 664516/664516 co-relation queries the response was YES. Maximal size of possible extension queue 1363. Compared 190589 event pairs, 1617 based on Foata normal form. 190/28994 useless extension candidates. Maximal degree in co-relation 216691. Up to 16832 conditions per place. [2023-08-04 07:39:13,280 INFO L140 encePairwiseOnDemand]: 243/265 looper letters, 2559 selfloop transitions, 1471 changer transitions 44/4078 dead transitions. [2023-08-04 07:39:13,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 4078 transitions, 57425 flow [2023-08-04 07:39:13,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2023-08-04 07:39:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2023-08-04 07:39:13,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 8766 transitions. [2023-08-04 07:39:13,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2827285921625544 [2023-08-04 07:39:13,293 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 8766 transitions. [2023-08-04 07:39:13,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 8766 transitions. [2023-08-04 07:39:13,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:39:13,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 8766 transitions. [2023-08-04 07:39:13,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 74.92307692307692) internal successors, (8766), 117 states have internal predecessors, (8766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:13,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 265.0) internal successors, (31270), 118 states have internal predecessors, (31270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:13,348 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 265.0) internal successors, (31270), 118 states have internal predecessors, (31270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:13,348 INFO L175 Difference]: Start difference. First operand has 395 places, 1968 transitions, 24615 flow. Second operand 117 states and 8766 transitions. [2023-08-04 07:39:13,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 4078 transitions, 57425 flow [2023-08-04 07:39:32,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 4078 transitions, 54944 flow, removed 576 selfloop flow, removed 19 redundant places. [2023-08-04 07:39:32,730 INFO L231 Difference]: Finished difference. Result has 552 places, 3265 transitions, 45491 flow [2023-08-04 07:39:32,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=23066, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1963, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=45491, PETRI_PLACES=552, PETRI_TRANSITIONS=3265} [2023-08-04 07:39:32,732 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 505 predicate places. [2023-08-04 07:39:32,732 INFO L495 AbstractCegarLoop]: Abstraction has has 552 places, 3265 transitions, 45491 flow [2023-08-04 07:39:32,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.44736842105263) internal successors, (2677), 38 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:32,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:39:32,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:39:32,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-04 07:39:32,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:39:32,934 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:39:32,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:39:32,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2007406340, now seen corresponding path program 2 times [2023-08-04 07:39:32,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:39:32,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550342803] [2023-08-04 07:39:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:39:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:39:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:39:33,591 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:39:33,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:39:33,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550342803] [2023-08-04 07:39:33,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550342803] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:39:33,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085652863] [2023-08-04 07:39:33,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 07:39:33,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:39:33,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:39:33,593 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:39:33,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-04 07:39:33,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 07:39:33,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:39:33,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-04 07:39:33,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:39:33,757 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-04 07:39:33,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-08-04 07:39:33,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:39:33,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:39:33,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:39:33,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:39:34,221 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:39:34,221 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:39:34,352 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 07:39:34,352 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 07:39:34,444 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:39:34,445 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:39:34,568 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:39:34,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:39:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:39:34,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:39:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:39:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085652863] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:39:35,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:39:35,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 12] total 35 [2023-08-04 07:39:35,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94571686] [2023-08-04 07:39:35,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:39:35,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-04 07:39:35,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:39:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-04 07:39:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2023-08-04 07:39:44,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 265 [2023-08-04 07:39:44,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 552 places, 3265 transitions, 45491 flow. Second operand has 36 states, 36 states have (on average 96.52777777777777) internal successors, (3475), 36 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:44,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:39:44,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 265 [2023-08-04 07:39:44,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:40:42,566 INFO L124 PetriNetUnfolderBase]: 25951/38581 cut-off events. [2023-08-04 07:40:42,567 INFO L125 PetriNetUnfolderBase]: For 1337362/1337364 co-relation queries the response was YES. [2023-08-04 07:40:43,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322401 conditions, 38581 events. 25951/38581 cut-off events. For 1337362/1337364 co-relation queries the response was YES. Maximal size of possible extension queue 1896. Compared 270187 event pairs, 2666 based on Foata normal form. 296/38869 useless extension candidates. Maximal degree in co-relation 322245. Up to 28661 conditions per place. [2023-08-04 07:40:43,623 INFO L140 encePairwiseOnDemand]: 250/265 looper letters, 3843 selfloop transitions, 1202 changer transitions 33/5082 dead transitions. [2023-08-04 07:40:43,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 5082 transitions, 79323 flow [2023-08-04 07:40:43,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-08-04 07:40:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-08-04 07:40:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 9583 transitions. [2023-08-04 07:40:43,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38065541211519366 [2023-08-04 07:40:43,637 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 9583 transitions. [2023-08-04 07:40:43,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 9583 transitions. [2023-08-04 07:40:43,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:40:43,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 9583 transitions. [2023-08-04 07:40:43,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 100.87368421052632) internal successors, (9583), 95 states have internal predecessors, (9583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:43,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 265.0) internal successors, (25440), 96 states have internal predecessors, (25440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:43,683 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 265.0) internal successors, (25440), 96 states have internal predecessors, (25440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:43,684 INFO L175 Difference]: Start difference. First operand has 552 places, 3265 transitions, 45491 flow. Second operand 95 states and 9583 transitions. [2023-08-04 07:40:43,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 5082 transitions, 79323 flow [2023-08-04 07:41:32,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 5082 transitions, 76215 flow, removed 654 selfloop flow, removed 21 redundant places. [2023-08-04 07:41:33,059 INFO L231 Difference]: Finished difference. Result has 668 places, 4357 transitions, 64492 flow [2023-08-04 07:41:33,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=42958, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=64492, PETRI_PLACES=668, PETRI_TRANSITIONS=4357} [2023-08-04 07:41:33,063 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 621 predicate places. [2023-08-04 07:41:33,063 INFO L495 AbstractCegarLoop]: Abstraction has has 668 places, 4357 transitions, 64492 flow [2023-08-04 07:41:33,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 96.52777777777777) internal successors, (3475), 36 states have internal predecessors, (3475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:33,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:41:33,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:41:33,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-04 07:41:33,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:41:33,271 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:41:33,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:41:33,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1597521757, now seen corresponding path program 1 times [2023-08-04 07:41:33,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:41:33,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194180041] [2023-08-04 07:41:33,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:41:33,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:41:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:41:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:41:33,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:41:33,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194180041] [2023-08-04 07:41:33,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194180041] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:41:33,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637523537] [2023-08-04 07:41:33,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:41:33,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:41:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:41:33,824 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:41:33,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-04 07:41:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:41:33,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-04 07:41:33,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:41:33,966 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-04 07:41:33,967 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 30 [2023-08-04 07:41:34,028 INFO L322 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-08-04 07:41:34,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 33 [2023-08-04 07:41:34,063 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-04 07:41:34,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-04 07:41:34,150 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 15 treesize of output 17 [2023-08-04 07:41:34,201 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 15 treesize of output 17 [2023-08-04 07:41:34,218 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 15 treesize of output 17 [2023-08-04 07:41:34,244 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-08-04 07:41:34,258 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:41:34,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:41:34,280 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_dest#1.base| v_ArrVal_687) |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_src#1.base|) (+ |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_src#1.offset| |c_thread2Thread1of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1|)) 0))) is different from false [2023-08-04 07:41:34,350 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 07:41:34,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2023-08-04 07:41:34,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-08-04 07:41:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 4 not checked. [2023-08-04 07:41:34,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637523537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:41:34,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:41:34,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2023-08-04 07:41:34,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265506727] [2023-08-04 07:41:34,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:41:34,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-04 07:41:34,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:41:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-04 07:41:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=449, Unknown=1, NotChecked=42, Total=552 [2023-08-04 07:41:34,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 265 [2023-08-04 07:41:34,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 668 places, 4357 transitions, 64492 flow. Second operand has 24 states, 24 states have (on average 76.04166666666667) internal successors, (1825), 24 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:34,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:41:34,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 265 [2023-08-04 07:41:34,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:42:05,319 INFO L124 PetriNetUnfolderBase]: 27597/41154 cut-off events. [2023-08-04 07:42:05,320 INFO L125 PetriNetUnfolderBase]: For 1554579/1554581 co-relation queries the response was YES. [2023-08-04 07:42:06,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354585 conditions, 41154 events. 27597/41154 cut-off events. For 1554579/1554581 co-relation queries the response was YES. Maximal size of possible extension queue 2054. Compared 292953 event pairs, 867 based on Foata normal form. 192/41341 useless extension candidates. Maximal degree in co-relation 354390. Up to 9709 conditions per place. [2023-08-04 07:42:06,981 INFO L140 encePairwiseOnDemand]: 248/265 looper letters, 2514 selfloop transitions, 2598 changer transitions 0/5116 dead transitions. [2023-08-04 07:42:06,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 714 places, 5116 transitions, 84283 flow [2023-08-04 07:42:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-04 07:42:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-04 07:42:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4184 transitions. [2023-08-04 07:42:06,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30362844702467345 [2023-08-04 07:42:06,986 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4184 transitions. [2023-08-04 07:42:06,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4184 transitions. [2023-08-04 07:42:06,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:42:06,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4184 transitions. [2023-08-04 07:42:06,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 80.46153846153847) internal successors, (4184), 52 states have internal predecessors, (4184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:07,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 265.0) internal successors, (14045), 53 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:07,005 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 265.0) internal successors, (14045), 53 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:42:07,005 INFO L175 Difference]: Start difference. First operand has 668 places, 4357 transitions, 64492 flow. Second operand 52 states and 4184 transitions. [2023-08-04 07:42:07,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 714 places, 5116 transitions, 84283 flow [2023-08-04 07:43:17,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 699 places, 5116 transitions, 81270 flow, removed 1472 selfloop flow, removed 15 redundant places. [2023-08-04 07:43:17,370 INFO L231 Difference]: Finished difference. Result has 724 places, 4765 transitions, 77337 flow [2023-08-04 07:43:17,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=62130, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2099, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=77337, PETRI_PLACES=724, PETRI_TRANSITIONS=4765} [2023-08-04 07:43:17,373 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 677 predicate places. [2023-08-04 07:43:17,374 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 4765 transitions, 77337 flow [2023-08-04 07:43:17,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 76.04166666666667) internal successors, (1825), 24 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:43:17,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:43:17,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:43:17,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-04 07:43:17,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:43:17,575 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:43:17,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:43:17,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1379942744, now seen corresponding path program 3 times [2023-08-04 07:43:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:43:17,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324840201] [2023-08-04 07:43:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:43:17,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:43:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:43:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:43:18,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:43:18,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324840201] [2023-08-04 07:43:18,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324840201] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:43:18,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750136264] [2023-08-04 07:43:18,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 07:43:18,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:43:18,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:43:18,397 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:43:18,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-04 07:43:18,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-04 07:43:18,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:43:18,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-04 07:43:18,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:43:18,587 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 07:43:18,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 07:43:18,614 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:43:18,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:43:18,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:43:18,784 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:43:18,915 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-08-04 07:43:18,915 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2023-08-04 07:43:19,088 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-08-04 07:43:19,088 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2023-08-04 07:43:19,161 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:43:19,162 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:43:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-04 07:43:19,224 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-04 07:43:19,225 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-08-04 07:43:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:43:19,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:43:24,200 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_750 Int) (|v_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1_54| Int) (v_ArrVal_748 Int) (v_ArrVal_742 (Array Int Int))) (or (< |v_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1_54| 1) (= 66 (select (store (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_742))) (let ((.cse0 (select .cse1 ~v~0.base))) (store .cse0 c_~v~0.offset (select (select (store .cse1 ~v~0.base (store .cse0 c_~v~0.offset (select (select .cse1 3) 0))) 3) 0)))) (+ c_~v~0.offset 1) v_ArrVal_748) (+ |v_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1_54| c_~v~0.offset) v_ArrVal_750) c_~v~0.offset)))) is different from false [2023-08-04 07:43:24,363 WARN L839 $PredicateComparison]: unable to prove that (forall ((~v~0.base Int) (v_ArrVal_750 Int) (|v_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1_54| Int) (v_ArrVal_748 Int) (v_ArrVal_742 (Array Int Int))) (or (= 66 (select (store (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_742))) (let ((.cse0 (select .cse1 ~v~0.base))) (store .cse0 0 (select (select (store .cse1 ~v~0.base (store .cse0 0 (select (select .cse1 3) 0))) 3) 0)))) 1 v_ArrVal_748) |v_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1_54| v_ArrVal_750) 0)) (< |v_thread2Thread2of2ForFork1_#Ultimate.C_strcpy_#t~offset18#1_54| 1))) is different from false [2023-08-04 07:43:24,526 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 14 not checked. [2023-08-04 07:43:24,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750136264] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:43:24,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:43:24,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 14] total 36 [2023-08-04 07:43:24,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799778652] [2023-08-04 07:43:24,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:43:24,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-04 07:43:24,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:43:24,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-04 07:43:24,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1036, Unknown=20, NotChecked=134, Total=1332 [2023-08-04 07:43:24,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 265 [2023-08-04 07:43:24,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 4765 transitions, 77337 flow. Second operand has 37 states, 37 states have (on average 70.67567567567568) internal successors, (2615), 37 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:43:24,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:43:24,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 265 [2023-08-04 07:43:24,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:44:20,802 INFO L124 PetriNetUnfolderBase]: 31086/46366 cut-off events. [2023-08-04 07:44:20,802 INFO L125 PetriNetUnfolderBase]: For 1757786/1757790 co-relation queries the response was YES. [2023-08-04 07:44:22,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477475 conditions, 46366 events. 31086/46366 cut-off events. For 1757786/1757790 co-relation queries the response was YES. Maximal size of possible extension queue 2292. Compared 334408 event pairs, 3636 based on Foata normal form. 251/46598 useless extension candidates. Maximal degree in co-relation 477264. Up to 38273 conditions per place. [2023-08-04 07:44:22,980 INFO L140 encePairwiseOnDemand]: 248/265 looper letters, 5019 selfloop transitions, 637 changer transitions 15/5675 dead transitions. [2023-08-04 07:44:22,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 5675 transitions, 104924 flow [2023-08-04 07:44:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-04 07:44:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-04 07:44:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2589 transitions. [2023-08-04 07:44:22,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28734739178690344 [2023-08-04 07:44:22,983 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2589 transitions. [2023-08-04 07:44:22,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2589 transitions. [2023-08-04 07:44:22,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:44:22,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2589 transitions. [2023-08-04 07:44:22,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 76.1470588235294) internal successors, (2589), 34 states have internal predecessors, (2589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:44:22,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 265.0) internal successors, (9275), 35 states have internal predecessors, (9275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:44:22,993 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 265.0) internal successors, (9275), 35 states have internal predecessors, (9275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:44:22,994 INFO L175 Difference]: Start difference. First operand has 724 places, 4765 transitions, 77337 flow. Second operand 34 states and 2589 transitions. [2023-08-04 07:44:22,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 5675 transitions, 104924 flow [2023-08-04 07:46:08,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 5675 transitions, 102395 flow, removed 1180 selfloop flow, removed 14 redundant places. [2023-08-04 07:46:08,823 INFO L231 Difference]: Finished difference. Result has 759 places, 5149 transitions, 85403 flow [2023-08-04 07:46:08,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=75621, PETRI_DIFFERENCE_MINUEND_PLACES=710, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=85403, PETRI_PLACES=759, PETRI_TRANSITIONS=5149} [2023-08-04 07:46:08,828 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 712 predicate places. [2023-08-04 07:46:08,828 INFO L495 AbstractCegarLoop]: Abstraction has has 759 places, 5149 transitions, 85403 flow [2023-08-04 07:46:08,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 70.67567567567568) internal successors, (2615), 37 states have internal predecessors, (2615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:46:08,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:46:08,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:46:08,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-04 07:46:09,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-04 07:46:09,034 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:46:09,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:46:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash -212142552, now seen corresponding path program 4 times [2023-08-04 07:46:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:46:09,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612920915] [2023-08-04 07:46:09,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:46:09,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:46:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:46:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:46:09,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:46:09,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612920915] [2023-08-04 07:46:09,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612920915] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:46:09,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266380086] [2023-08-04 07:46:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-04 07:46:09,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:46:09,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:46:09,587 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:46:09,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-04 07:46:09,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-04 07:46:09,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:46:09,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 57 conjunts are in the unsatisfiable core [2023-08-04 07:46:09,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:46:09,776 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-04 07:46:09,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-04 07:46:09,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:46:09,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:46:09,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:46:09,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-04 07:46:10,181 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-04 07:46:10,233 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 19 treesize of output 18 [2023-08-04 07:46:10,300 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 19 treesize of output 18 [2023-08-04 07:46:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:46:10,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:46:10,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 402 treesize of output 394 [2023-08-04 07:46:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:46:10,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266380086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:46:10,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:46:10,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 32 [2023-08-04 07:46:10,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961492697] [2023-08-04 07:46:10,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:46:10,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-04 07:46:10,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:46:10,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-04 07:46:10,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2023-08-04 07:46:14,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 265 [2023-08-04 07:46:14,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 759 places, 5149 transitions, 85403 flow. Second operand has 33 states, 33 states have (on average 96.72727272727273) internal successors, (3192), 33 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:46:14,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:46:14,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 265 [2023-08-04 07:46:14,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:47:13,551 INFO L124 PetriNetUnfolderBase]: 35605/53049 cut-off events. [2023-08-04 07:47:13,551 INFO L125 PetriNetUnfolderBase]: For 1259264/1259268 co-relation queries the response was YES. [2023-08-04 07:47:15,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520961 conditions, 53049 events. 35605/53049 cut-off events. For 1259264/1259268 co-relation queries the response was YES. Maximal size of possible extension queue 2632. Compared 389827 event pairs, 3709 based on Foata normal form. 283/53314 useless extension candidates. Maximal degree in co-relation 520737. Up to 39695 conditions per place. [2023-08-04 07:47:16,158 INFO L140 encePairwiseOnDemand]: 251/265 looper letters, 5169 selfloop transitions, 1387 changer transitions 34/6594 dead transitions. [2023-08-04 07:47:16,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 828 places, 6594 transitions, 123826 flow [2023-08-04 07:47:16,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-04 07:47:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-04 07:47:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 7293 transitions. [2023-08-04 07:47:16,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3822327044025157 [2023-08-04 07:47:16,165 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 7293 transitions. [2023-08-04 07:47:16,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 7293 transitions. [2023-08-04 07:47:16,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:47:16,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 7293 transitions. [2023-08-04 07:47:16,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 101.29166666666667) internal successors, (7293), 72 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:47:16,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 265.0) internal successors, (19345), 73 states have internal predecessors, (19345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:47:16,193 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 265.0) internal successors, (19345), 73 states have internal predecessors, (19345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:47:16,193 INFO L175 Difference]: Start difference. First operand has 759 places, 5149 transitions, 85403 flow. Second operand 72 states and 7293 transitions. [2023-08-04 07:47:16,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 828 places, 6594 transitions, 123826 flow [2023-08-04 07:48:48,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 6594 transitions, 122816 flow, removed 347 selfloop flow, removed 14 redundant places. [2023-08-04 07:48:49,016 INFO L231 Difference]: Finished difference. Result has 847 places, 5881 transitions, 103849 flow [2023-08-04 07:48:49,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=265, PETRI_DIFFERENCE_MINUEND_FLOW=83807, PETRI_DIFFERENCE_MINUEND_PLACES=743, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=4178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=103849, PETRI_PLACES=847, PETRI_TRANSITIONS=5881} [2023-08-04 07:48:49,020 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 800 predicate places. [2023-08-04 07:48:49,020 INFO L495 AbstractCegarLoop]: Abstraction has has 847 places, 5881 transitions, 103849 flow [2023-08-04 07:48:49,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 96.72727272727273) internal successors, (3192), 33 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:48:49,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:48:49,021 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:48:49,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-04 07:48:49,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-04 07:48:49,222 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:48:49,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:48:49,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2020831975, now seen corresponding path program 3 times [2023-08-04 07:48:49,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:48:49,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003905050] [2023-08-04 07:48:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:48:49,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:48:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:48:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 07:48:49,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:48:49,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003905050] [2023-08-04 07:48:49,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003905050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:48:49,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353085371] [2023-08-04 07:48:49,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-04 07:48:49,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:48:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:48:49,817 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:48:49,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-04 07:48:49,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-04 07:48:49,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 07:48:49,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-04 07:48:49,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:48:49,972 INFO L322 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2023-08-04 07:48:49,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 37 [2023-08-04 07:48:50,054 INFO L322 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-08-04 07:48:50,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-08-04 07:48:50,119 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-04 07:48:50,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-08-04 07:48:50,242 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 15 treesize of output 17 [2023-08-04 07:48:50,269 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 15 treesize of output 17 [2023-08-04 07:48:50,301 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 15 treesize of output 17 [2023-08-04 07:48:50,311 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 15 treesize of output 17 [2023-08-04 07:48:50,356 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-08-04 07:48:50,379 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 07:48:50,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:48:50,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-04 07:48:50,571 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 131 [2023-08-04 07:48:50,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2023-08-04 07:48:50,578 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-08-04 07:48:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 14 refuted. 1 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 07:48:50,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353085371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:48:50,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:48:50,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 12] total 25 [2023-08-04 07:48:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582182063] [2023-08-04 07:48:50,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:48:50,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-04 07:48:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:48:50,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-04 07:48:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=579, Unknown=5, NotChecked=0, Total=650 [2023-08-04 07:48:52,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 265 [2023-08-04 07:48:52,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 847 places, 5881 transitions, 103849 flow. Second operand has 26 states, 26 states have (on average 71.84615384615384) internal successors, (1868), 26 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:48:52,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:48:52,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 265 [2023-08-04 07:48:52,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:48:57,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 07:49:02,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 07:49:04,632 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-04 07:50:07,314 INFO L124 PetriNetUnfolderBase]: 36444/54214 cut-off events. [2023-08-04 07:50:07,314 INFO L125 PetriNetUnfolderBase]: For 1505832/1505836 co-relation queries the response was YES. [2023-08-04 07:50:09,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 555749 conditions, 54214 events. 36444/54214 cut-off events. For 1505832/1505836 co-relation queries the response was YES. Maximal size of possible extension queue 2730. Compared 399198 event pairs, 784 based on Foata normal form. 603/54815 useless extension candidates. Maximal degree in co-relation 555496. Up to 14395 conditions per place. [2023-08-04 07:50:10,325 INFO L140 encePairwiseOnDemand]: 252/265 looper letters, 3049 selfloop transitions, 3452 changer transitions 0/6505 dead transitions. [2023-08-04 07:50:10,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 885 places, 6505 transitions, 127132 flow [2023-08-04 07:50:10,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-04 07:50:10,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-04 07:50:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 4484 transitions. [2023-08-04 07:50:10,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28679245283018867 [2023-08-04 07:50:10,330 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 4484 transitions. [2023-08-04 07:50:10,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 4484 transitions. [2023-08-04 07:50:10,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:10,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 4484 transitions. [2023-08-04 07:50:10,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 76.0) internal successors, (4484), 59 states have internal predecessors, (4484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:50:10,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 265.0) internal successors, (15900), 60 states have internal predecessors, (15900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:50:10,347 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 265.0) internal successors, (15900), 60 states have internal predecessors, (15900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:50:10,347 INFO L175 Difference]: Start difference. First operand has 847 places, 5881 transitions, 103849 flow. Second operand 59 states and 4484 transitions. [2023-08-04 07:50:10,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 885 places, 6505 transitions, 127132 flow Received shutdown request... [2023-08-04 07:50:23,741 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:50:23,741 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:50:23,859 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:50:23,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-04 07:50:24,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-04 07:50:24,060 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-04 07:50:24,060 INFO L445 BasicCegarLoop]: Path program histogram: [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:24,060 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 07:50:24,061 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 07:50:24,061 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 07:50:24,064 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 07:50:24 BasicIcfg [2023-08-04 07:50:24,064 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 07:50:24,064 INFO L158 Benchmark]: Toolchain (without parser) took 804043.09ms. Allocated memory was 505.4MB in the beginning and 11.4GB in the end (delta: 10.9GB). Free memory was 455.5MB in the beginning and 6.5GB in the end (delta: -6.0GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-04 07:50:24,064 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 354.4MB. Free memory is still 307.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 07:50:24,065 INFO L158 Benchmark]: CACSL2BoogieTranslator took 655.66ms. Allocated memory is still 505.4MB. Free memory was 455.2MB in the beginning and 473.1MB in the end (delta: -17.9MB). Peak memory consumption was 41.0MB. Max. memory is 16.0GB. [2023-08-04 07:50:24,065 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.38ms. Allocated memory is still 505.4MB. Free memory was 473.1MB in the beginning and 470.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:50:24,065 INFO L158 Benchmark]: Boogie Preprocessor took 25.17ms. Allocated memory is still 505.4MB. Free memory was 470.6MB in the beginning and 469.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:50:24,065 INFO L158 Benchmark]: RCFGBuilder took 395.13ms. Allocated memory is still 505.4MB. Free memory was 469.2MB in the beginning and 453.2MB in the end (delta: 16.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 07:50:24,065 INFO L158 Benchmark]: TraceAbstraction took 802917.51ms. Allocated memory was 505.4MB in the beginning and 11.4GB in the end (delta: 10.9GB). Free memory was 452.4MB in the beginning and 6.5GB in the end (delta: -6.0GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. [2023-08-04 07:50:24,066 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 354.4MB. Free memory is still 307.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 655.66ms. Allocated memory is still 505.4MB. Free memory was 455.2MB in the beginning and 473.1MB in the end (delta: -17.9MB). Peak memory consumption was 41.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.38ms. Allocated memory is still 505.4MB. Free memory was 473.1MB in the beginning and 470.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.17ms. Allocated memory is still 505.4MB. Free memory was 470.6MB in the beginning and 469.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 395.13ms. Allocated memory is still 505.4MB. Free memory was 469.2MB in the beginning and 453.2MB in the end (delta: 16.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 802917.51ms. Allocated memory was 505.4MB in the beginning and 11.4GB in the end (delta: 10.9GB). Free memory was 452.4MB in the beginning and 6.5GB in the end (delta: -6.0GB). Peak memory consumption was 5.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] - GenericResultAtLocation [Line: 274]: Unsoundness Warning unspecified type, defaulting to int C: short [274] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 108 PlacesBefore, 32 PlacesAfterwards, 115 TransitionsBefore, 34 TransitionsAfterwards, 2544 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 5 ChoiceCompositions, 99 TotalNumberOfCompositions, 4510 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3115, independent: 3005, independent conditional: 0, independent unconditional: 3005, dependent: 110, dependent conditional: 0, dependent unconditional: 110, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1499, independent: 1464, independent conditional: 0, independent unconditional: 1464, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3115, independent: 1541, independent conditional: 0, independent unconditional: 1541, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 1499, unknown conditional: 0, unknown unconditional: 1499] , Statistics on independence cache: Total cache size (in pairs): 98, Positive cache size: 87, Positive conditional cache size: 0, Positive unconditional cache size: 87, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 109 PlacesBefore, 32 PlacesAfterwards, 115 TransitionsBefore, 33 TransitionsAfterwards, 2496 CoEnabledTransitionPairs, 5 FixpointIterations, 24 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 23 ConcurrentYvCompositions, 5 ChoiceCompositions, 100 TotalNumberOfCompositions, 3987 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2911, independent: 2821, independent conditional: 0, independent unconditional: 2821, dependent: 90, dependent conditional: 0, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1461, independent: 1426, independent conditional: 0, independent unconditional: 1426, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2911, independent: 1395, independent conditional: 0, independent unconditional: 1395, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 1461, unknown conditional: 0, unknown unconditional: 1461] , Statistics on independence cache: Total cache size (in pairs): 93, Positive cache size: 82, Positive conditional cache size: 0, Positive unconditional cache size: 82, Negative cache size: 11, Negative conditional cache size: 0, Negative unconditional cache size: 11, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 135 PlacesBefore, 47 PlacesAfterwards, 144 TransitionsBefore, 51 TransitionsAfterwards, 6624 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 61 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 31 ConcurrentYvCompositions, 5 ChoiceCompositions, 118 TotalNumberOfCompositions, 13677 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8749, independent: 8579, independent conditional: 0, independent unconditional: 8579, dependent: 170, dependent conditional: 0, dependent unconditional: 170, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3979, independent: 3923, independent conditional: 0, independent unconditional: 3923, dependent: 56, dependent conditional: 0, dependent unconditional: 56, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8749, independent: 4656, independent conditional: 0, independent unconditional: 4656, dependent: 114, dependent conditional: 0, dependent unconditional: 114, unknown: 3979, unknown conditional: 0, unknown unconditional: 3979] , Statistics on independence cache: Total cache size (in pairs): 288, Positive cache size: 271, Positive conditional cache size: 0, Positive unconditional cache size: 271, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 1107]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 128 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 5.2s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 99 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 289 IncrementalHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 17 mSDtfsCounter, 289 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=4, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 142 ConstructedInterpolants, 0 QuantifiedInterpolants, 210 SizeOfPredicates, 0 NumberOfNonLiveVariables, 575 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 18/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 7 procedures, 151 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 795.2s, OverallIterations: 20, TraceHistogramMax: 3, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 764.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 109 mSolverCounterUnknown, 10269 SdHoareTripleChecker+Valid, 75.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9783 mSDsluCounter, 22874 SdHoareTripleChecker+Invalid, 70.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3862 IncrementalHoareTripleChecker+Unchecked, 22440 mSDsCounter, 1382 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 59834 IncrementalHoareTripleChecker+Invalid, 65187 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1382 mSolverCounterUnsat, 434 mSDtfsCounter, 59834 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2201 GetRequests, 1270 SyntacticMatches, 26 SemanticMatches, 905 ConstructedPredicates, 6 IntricatePredicates, 10 DeprecatedPredicates, 25863 ImplicationChecksByTransitivity, 109.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103849occurred in iteration=19, InterpolantAutomatonStates: 664, 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: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 21.0s InterpolantComputationTime, 1545 NumberOfCodeBlocks, 1516 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 2164 ConstructedInterpolants, 222 QuantifiedInterpolants, 24747 SizeOfPredicates, 156 NumberOfNonLiveVariables, 4529 ConjunctsInSsa, 516 ConjunctsInUnsatCore, 52 InterpolantComputations, 6 PerfectInterpolantSequences, 534/939 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 128 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.4s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown