/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-wmm_safe017_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:04:48,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:04:48,394 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:04:48,398 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:04:48,398 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:04:48,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:04:48,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:04:48,424 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:04:48,425 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:04:48,425 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:04:48,425 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:04:48,426 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:04:48,426 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:04:48,427 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:04:48,427 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:04:48,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:04:48,428 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:04:48,428 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:04:48,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:04:48,429 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:04:48,429 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:04:48,430 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:04:48,430 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:04:48,430 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:04:48,431 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:04:48,431 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:04:48,431 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:04:48,432 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:04:48,432 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:04:48,432 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:04:48,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:04:48,433 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:04:48,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:04:48,434 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:04:48,434 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:04:48,434 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:04:48,435 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:04:48,435 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:04:48,435 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:04:48,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:04:48,436 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:04:48,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:04:48,619 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:04:48,637 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:04:48,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:04:48,640 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:04:48,640 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:04:48,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe017_tso_bound2.i [2023-08-04 07:04:49,868 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:04:50,130 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:04:50,131 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe017_tso_bound2.i [2023-08-04 07:04:50,151 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21b40b580/c70c86f09678489886bcbc195ffe99d8/FLAGc66e51157 [2023-08-04 07:04:50,163 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21b40b580/c70c86f09678489886bcbc195ffe99d8 [2023-08-04 07:04:50,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:04:50,167 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:04:50,168 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:04:50,168 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:04:50,179 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:04:50,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ecc34fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50, skipping insertion in model container [2023-08-04 07:04:50,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,218 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:04:50,384 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-wmm_safe017_tso_bound2.i[945,958] [2023-08-04 07:04:50,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:04:50,550 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:04:50,559 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-wmm_safe017_tso_bound2.i[945,958] [2023-08-04 07:04:50,566 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:04:50,568 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:04:50,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:04:50,605 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:04:50,605 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:04:50,610 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:04:50,610 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50 WrapperNode [2023-08-04 07:04:50,610 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:04:50,611 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:04:50,612 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:04:50,612 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:04:50,616 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,629 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,647 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93 [2023-08-04 07:04:50,648 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:04:50,649 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:04:50,649 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:04:50,649 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:04:50,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,668 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,672 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,674 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,678 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:04:50,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:04:50,679 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:04:50,679 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:04:50,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (1/1) ... [2023-08-04 07:04:50,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:04:50,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:04:50,730 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 07:04:50,755 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 07:04:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:04:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:04:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:04:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:04:50,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:04:50,769 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:04:50,769 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:04:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:04:50,770 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:04:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:04:50,770 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:04:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:04:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:04:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:04:50,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:04:50,772 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 07:04:50,917 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:04:50,919 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:04:51,129 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:04:51,136 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:04:51,136 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:04:51,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:04:51 BoogieIcfgContainer [2023-08-04 07:04:51,138 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:04:51,140 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:04:51,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:04:51,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:04:51,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:04:50" (1/3) ... [2023-08-04 07:04:51,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a095fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:04:51, skipping insertion in model container [2023-08-04 07:04:51,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:04:50" (2/3) ... [2023-08-04 07:04:51,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a095fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:04:51, skipping insertion in model container [2023-08-04 07:04:51,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:04:51" (3/3) ... [2023-08-04 07:04:51,145 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe017_tso_bound2.i [2023-08-04 07:04:51,152 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:04:51,160 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:04:51,160 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:04:51,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:04:51,211 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:04:51,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 103 transitions, 221 flow [2023-08-04 07:04:51,356 INFO L124 PetriNetUnfolderBase]: 30/410 cut-off events. [2023-08-04 07:04:51,356 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:51,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 410 events. 30/410 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1853 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-08-04 07:04:51,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 103 transitions, 221 flow [2023-08-04 07:04:51,372 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 91 places, 88 transitions, 185 flow [2023-08-04 07:04:51,375 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:04:51,385 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 91 places, 88 transitions, 185 flow [2023-08-04 07:04:51,387 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 91 places, 88 transitions, 185 flow [2023-08-04 07:04:51,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 91 places, 88 transitions, 185 flow [2023-08-04 07:04:51,457 INFO L124 PetriNetUnfolderBase]: 22/307 cut-off events. [2023-08-04 07:04:51,457 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:51,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 307 events. 22/307 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1210 event pairs, 0 based on Foata normal form. 0/271 useless extension candidates. Maximal degree in co-relation 185. Up to 16 conditions per place. [2023-08-04 07:04:51,461 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-04 07:04:53,246 INFO L134 LiptonReduction]: Checked pairs total: 2392 [2023-08-04 07:04:53,246 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-04 07:04:53,270 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:04:53,277 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;@163ce9a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:04:53,278 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:04:53,290 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:04:53,290 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-04 07:04:53,290 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:53,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:53,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:04:53,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:53,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash 345088142, now seen corresponding path program 1 times [2023-08-04 07:04:53,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:53,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292710231] [2023-08-04 07:04:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:53,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:53,529 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 07:04:53,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:53,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292710231] [2023-08-04 07:04:53,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292710231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:53,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:04:53,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:04:53,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668092540] [2023-08-04 07:04:53,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:53,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:53,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:04:53,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 175 [2023-08-04 07:04:53,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 55 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:53,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:53,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 175 [2023-08-04 07:04:53,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:53,753 INFO L124 PetriNetUnfolderBase]: 400/733 cut-off events. [2023-08-04 07:04:53,753 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:04:53,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1442 conditions, 733 events. 400/733 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3541 event pairs, 222 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1429. Up to 668 conditions per place. [2023-08-04 07:04:53,760 INFO L140 encePairwiseOnDemand]: 171/175 looper letters, 20 selfloop transitions, 2 changer transitions 1/25 dead transitions. [2023-08-04 07:04:53,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 105 flow [2023-08-04 07:04:53,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:04:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:04:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-08-04 07:04:53,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2023-08-04 07:04:53,773 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-08-04 07:04:53,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-08-04 07:04:53,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:53,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-08-04 07:04:53,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:53,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:53,785 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:53,787 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 55 flow. Second operand 3 states and 295 transitions. [2023-08-04 07:04:53,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 105 flow [2023-08-04 07:04:53,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 105 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:04:53,791 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 61 flow [2023-08-04 07:04:53,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-04 07:04:53,795 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-04 07:04:53,795 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 61 flow [2023-08-04 07:04:53,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:53,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:53,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:04:53,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:04:53,796 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:53,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1144420665, now seen corresponding path program 1 times [2023-08-04 07:04:53,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:53,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661635308] [2023-08-04 07:04:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:53,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:53,920 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 07:04:53,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:53,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661635308] [2023-08-04 07:04:53,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661635308] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:04:53,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691724094] [2023-08-04 07:04:53,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:53,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:53,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:04:53,933 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 07:04:53,939 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 07:04:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:54,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:04:54,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:04:54,053 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 07:04:54,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:04:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691724094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:54,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:04:54,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:04:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141262819] [2023-08-04 07:04:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:54,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:54,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:54,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:04:54,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 175 [2023-08-04 07:04:54,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:54,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 175 [2023-08-04 07:04:54,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:54,177 INFO L124 PetriNetUnfolderBase]: 338/601 cut-off events. [2023-08-04 07:04:54,178 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:04:54,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 601 events. 338/601 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2601 event pairs, 202 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 1181. Up to 529 conditions per place. [2023-08-04 07:04:54,185 INFO L140 encePairwiseOnDemand]: 172/175 looper letters, 22 selfloop transitions, 2 changer transitions 1/27 dead transitions. [2023-08-04 07:04:54,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 121 flow [2023-08-04 07:04:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:04:54,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:04:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 296 transitions. [2023-08-04 07:04:54,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638095238095238 [2023-08-04 07:04:54,197 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 296 transitions. [2023-08-04 07:04:54,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 296 transitions. [2023-08-04 07:04:54,197 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:54,197 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 296 transitions. [2023-08-04 07:04:54,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,202 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 61 flow. Second operand 3 states and 296 transitions. [2023-08-04 07:04:54,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 121 flow [2023-08-04 07:04:54,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 117 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:04:54,204 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 65 flow [2023-08-04 07:04:54,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-04 07:04:54,205 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-08-04 07:04:54,205 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 65 flow [2023-08-04 07:04:54,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:54,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:04:54,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 07:04:54,410 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 07:04:54,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:54,411 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:54,412 INFO L85 PathProgramCache]: Analyzing trace with hash -332632688, now seen corresponding path program 1 times [2023-08-04 07:04:54,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:54,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199685032] [2023-08-04 07:04:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:54,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:54,473 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 07:04:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199685032] [2023-08-04 07:04:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199685032] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:04:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234442429] [2023-08-04 07:04:54,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:54,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:54,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:04:54,476 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 07:04:54,497 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 07:04:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:54,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:04:54,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:04:54,579 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 07:04:54,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:04:54,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234442429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:54,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:04:54,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:04:54,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234346867] [2023-08-04 07:04:54,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:54,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:54,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:04:54,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 175 [2023-08-04 07:04:54,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:54,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 175 [2023-08-04 07:04:54,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:54,694 INFO L124 PetriNetUnfolderBase]: 314/523 cut-off events. [2023-08-04 07:04:54,694 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-04 07:04:54,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 523 events. 314/523 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2148 event pairs, 182 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 1088. Up to 407 conditions per place. [2023-08-04 07:04:54,697 INFO L140 encePairwiseOnDemand]: 172/175 looper letters, 24 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-04 07:04:54,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 133 flow [2023-08-04 07:04:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:04:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:04:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-08-04 07:04:54,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676190476190476 [2023-08-04 07:04:54,701 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-08-04 07:04:54,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-08-04 07:04:54,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:54,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-08-04 07:04:54,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 175.0) internal successors, (700), 4 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,704 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 65 flow. Second operand 3 states and 298 transitions. [2023-08-04 07:04:54,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 133 flow [2023-08-04 07:04:54,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:04:54,706 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 69 flow [2023-08-04 07:04:54,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-04 07:04:54,707 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-04 07:04:54,707 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 69 flow [2023-08-04 07:04:54,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:54,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:54,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:04:54,716 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 07:04:54,913 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 07:04:54,914 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:54,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:54,914 INFO L85 PathProgramCache]: Analyzing trace with hash -982721073, now seen corresponding path program 1 times [2023-08-04 07:04:54,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:54,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797921925] [2023-08-04 07:04:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:54,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:54,978 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 07:04:54,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:54,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797921925] [2023-08-04 07:04:54,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797921925] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:04:54,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83359970] [2023-08-04 07:04:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:54,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:04:54,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:04:54,980 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 07:04:54,983 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 07:04:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:55,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:04:55,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:04:55,093 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 07:04:55,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:04:55,112 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 07:04:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83359970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:04:55,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:04:55,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 07:04:55,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839501387] [2023-08-04 07:04:55,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:04:55,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:04:55,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:55,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:04:55,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:04:55,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 175 [2023-08-04 07:04:55,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:55,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:55,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 175 [2023-08-04 07:04:55,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:55,145 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:04:55,145 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:04:55,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:04:55,147 INFO L140 encePairwiseOnDemand]: 172/175 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:04:55,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 07:04:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:04:55,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:04:55,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 366 transitions. [2023-08-04 07:04:55,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5228571428571429 [2023-08-04 07:04:55,149 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 366 transitions. [2023-08-04 07:04:55,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 366 transitions. [2023-08-04 07:04:55,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:55,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 366 transitions. [2023-08-04 07:04:55,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:55,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:55,152 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 175.0) internal successors, (875), 5 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:55,152 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 69 flow. Second operand 4 states and 366 transitions. [2023-08-04 07:04:55,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 07:04:55,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:04:55,153 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 07:04:55,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=175, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 07:04:55,154 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -11 predicate places. [2023-08-04 07:04:55,154 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 07:04:55,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:55,157 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:04:55,168 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 07:04:55,363 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 07:04:55,363 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:04:55,365 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:04:55,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 103 transitions, 221 flow [2023-08-04 07:04:55,397 INFO L124 PetriNetUnfolderBase]: 30/410 cut-off events. [2023-08-04 07:04:55,397 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:55,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435 conditions, 410 events. 30/410 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1853 event pairs, 0 based on Foata normal form. 0/358 useless extension candidates. Maximal degree in co-relation 239. Up to 16 conditions per place. [2023-08-04 07:04:55,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 103 transitions, 221 flow [2023-08-04 07:04:55,399 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 75 transitions, 165 flow [2023-08-04 07:04:55,399 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:04:55,399 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 75 transitions, 165 flow [2023-08-04 07:04:55,400 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 75 transitions, 165 flow [2023-08-04 07:04:55,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 75 transitions, 165 flow [2023-08-04 07:04:55,413 INFO L124 PetriNetUnfolderBase]: 6/186 cut-off events. [2023-08-04 07:04:55,413 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:55,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 186 events. 6/186 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 567 event pairs, 0 based on Foata normal form. 0/174 useless extension candidates. Maximal degree in co-relation 127. Up to 8 conditions per place. [2023-08-04 07:04:55,415 INFO L119 LiptonReduction]: Number of co-enabled transitions 1042 [2023-08-04 07:04:56,871 INFO L134 LiptonReduction]: Checked pairs total: 1792 [2023-08-04 07:04:56,871 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-08-04 07:04:56,873 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:04:56,873 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;@163ce9a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:04:56,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:04:56,881 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:04:56,881 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 07:04:56,881 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:56,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:56,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:04:56,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:04:56,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:56,882 INFO L85 PathProgramCache]: Analyzing trace with hash -441565552, now seen corresponding path program 1 times [2023-08-04 07:04:56,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:56,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110254758] [2023-08-04 07:04:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:56,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:56,937 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 07:04:56,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:56,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110254758] [2023-08-04 07:04:56,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110254758] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:56,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:04:56,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:04:56,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17009243] [2023-08-04 07:04:56,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:56,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:56,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:56,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:04:56,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 161 [2023-08-04 07:04:56,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:56,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:56,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 161 [2023-08-04 07:04:56,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:04:56,994 INFO L124 PetriNetUnfolderBase]: 160/325 cut-off events. [2023-08-04 07:04:56,994 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:04:56,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 668 conditions, 325 events. 160/325 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1453 event pairs, 78 based on Foata normal form. 0/310 useless extension candidates. Maximal degree in co-relation 649. Up to 284 conditions per place. [2023-08-04 07:04:56,996 INFO L140 encePairwiseOnDemand]: 158/161 looper letters, 18 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-04 07:04:56,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 105 flow [2023-08-04 07:04:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:04:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:04:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-08-04 07:04:56,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2023-08-04 07:04:56,998 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-08-04 07:04:56,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-08-04 07:04:56,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:04:56,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-08-04 07:04:56,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:57,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:57,000 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:57,000 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 59 flow. Second operand 3 states and 291 transitions. [2023-08-04 07:04:57,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 105 flow [2023-08-04 07:04:57,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 105 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:04:57,002 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 67 flow [2023-08-04 07:04:57,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=161, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=67, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-04 07:04:57,005 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-04 07:04:57,005 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 67 flow [2023-08-04 07:04:57,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 3 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:57,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:57,005 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:04:57,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:04:57,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:04:57,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:57,006 INFO L85 PathProgramCache]: Analyzing trace with hash -437840807, now seen corresponding path program 1 times [2023-08-04 07:04:57,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:57,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139611014] [2023-08-04 07:04:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:57,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:04:57,028 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:04:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:04:57,077 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:04:57,077 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:04:57,077 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:04:57,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:04:57,078 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:04:57,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:04:57,078 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 07:04:57,079 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:04:57,079 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:04:57,079 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:04:57,102 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:04:57,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 123 transitions, 282 flow [2023-08-04 07:04:57,204 INFO L124 PetriNetUnfolderBase]: 93/1296 cut-off events. [2023-08-04 07:04:57,204 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:04:57,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1394 conditions, 1296 events. 93/1296 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8825 event pairs, 0 based on Foata normal form. 0/1137 useless extension candidates. Maximal degree in co-relation 937. Up to 54 conditions per place. [2023-08-04 07:04:57,209 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 123 transitions, 282 flow [2023-08-04 07:04:57,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 117 places, 108 transitions, 240 flow [2023-08-04 07:04:57,212 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:04:57,212 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 117 places, 108 transitions, 240 flow [2023-08-04 07:04:57,212 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 117 places, 108 transitions, 240 flow [2023-08-04 07:04:57,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 108 transitions, 240 flow [2023-08-04 07:04:57,280 INFO L124 PetriNetUnfolderBase]: 66/959 cut-off events. [2023-08-04 07:04:57,281 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:04:57,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1031 conditions, 959 events. 66/959 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 5898 event pairs, 0 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 709. Up to 54 conditions per place. [2023-08-04 07:04:57,297 INFO L119 LiptonReduction]: Number of co-enabled transitions 3716 [2023-08-04 07:04:58,811 INFO L134 LiptonReduction]: Checked pairs total: 7034 [2023-08-04 07:04:58,812 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-04 07:04:58,813 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:04:58,814 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;@163ce9a6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:04:58,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:04:58,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:04:58,816 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 07:04:58,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:04:58,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:04:58,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:04:58,817 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:04:58,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:04:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash 612355081, now seen corresponding path program 1 times [2023-08-04 07:04:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:04:58,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590300311] [2023-08-04 07:04:58,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:04:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:04:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:04:58,861 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 07:04:58,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:04:58,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590300311] [2023-08-04 07:04:58,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590300311] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:04:58,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:04:58,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:04:58,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829410766] [2023-08-04 07:04:58,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:04:58,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:04:58,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:04:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:04:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:04:58,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 201 [2023-08-04 07:04:58,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:04:58,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:04:58,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 201 [2023-08-04 07:04:58,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:02,789 INFO L124 PetriNetUnfolderBase]: 33046/46787 cut-off events. [2023-08-04 07:05:02,789 INFO L125 PetriNetUnfolderBase]: For 1449/1449 co-relation queries the response was YES. [2023-08-04 07:05:02,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92178 conditions, 46787 events. 33046/46787 cut-off events. For 1449/1449 co-relation queries the response was YES. Maximal size of possible extension queue 1482. Compared 309191 event pairs, 26064 based on Foata normal form. 0/44569 useless extension candidates. Maximal degree in co-relation 26065. Up to 43520 conditions per place. [2023-08-04 07:05:03,074 INFO L140 encePairwiseOnDemand]: 198/201 looper letters, 31 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-04 07:05:03,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 170 flow [2023-08-04 07:05:03,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:03,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:03,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 355 transitions. [2023-08-04 07:05:03,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887230514096186 [2023-08-04 07:05:03,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 355 transitions. [2023-08-04 07:05:03,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 355 transitions. [2023-08-04 07:05:03,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:03,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 355 transitions. [2023-08-04 07:05:03,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:03,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:03,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:03,079 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 96 flow. Second operand 3 states and 355 transitions. [2023-08-04 07:05:03,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 170 flow [2023-08-04 07:05:03,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:05:03,080 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 108 flow [2023-08-04 07:05:03,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-04 07:05:03,081 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 07:05:03,081 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 108 flow [2023-08-04 07:05:03,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:03,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:03,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:05:03,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:05:03,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:03,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash 685105654, now seen corresponding path program 1 times [2023-08-04 07:05:03,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:03,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189609053] [2023-08-04 07:05:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:03,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:03,112 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 07:05:03,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:03,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189609053] [2023-08-04 07:05:03,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189609053] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:03,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038197444] [2023-08-04 07:05:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:03,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:03,114 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 07:05:03,116 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 07:05:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:03,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:05:03,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:03,186 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 07:05:03,186 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:05:03,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038197444] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:03,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:05:03,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:05:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822067586] [2023-08-04 07:05:03,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:03,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:05:03,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:03,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:05:03,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:05:03,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 201 [2023-08-04 07:05:03,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:03,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:03,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 201 [2023-08-04 07:05:03,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:05,711 INFO L124 PetriNetUnfolderBase]: 31406/44609 cut-off events. [2023-08-04 07:05:05,711 INFO L125 PetriNetUnfolderBase]: For 1215/1215 co-relation queries the response was YES. [2023-08-04 07:05:05,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87490 conditions, 44609 events. 31406/44609 cut-off events. For 1215/1215 co-relation queries the response was YES. Maximal size of possible extension queue 1528. Compared 294592 event pairs, 24928 based on Foata normal form. 0/42556 useless extension candidates. Maximal degree in co-relation 87453. Up to 40987 conditions per place. [2023-08-04 07:05:05,937 INFO L140 encePairwiseOnDemand]: 198/201 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 07:05:05,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 200 flow [2023-08-04 07:05:05,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-04 07:05:05,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5953565505804311 [2023-08-04 07:05:05,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-04 07:05:05,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-04 07:05:05,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:05,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-04 07:05:05,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:05,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:05,942 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:05,942 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 108 flow. Second operand 3 states and 359 transitions. [2023-08-04 07:05:05,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 200 flow [2023-08-04 07:05:05,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:05:05,945 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 118 flow [2023-08-04 07:05:05,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-04 07:05:05,945 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-04 07:05:05,946 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 118 flow [2023-08-04 07:05:05,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:05,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:05,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:05:05,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 07:05:06,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:06,156 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:06,156 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1397801155, now seen corresponding path program 1 times [2023-08-04 07:05:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:06,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046223789] [2023-08-04 07:05:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:06,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:06,207 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 07:05:06,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:06,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046223789] [2023-08-04 07:05:06,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046223789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:06,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010860249] [2023-08-04 07:05:06,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:06,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:06,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:06,209 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 07:05:06,211 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 07:05:06,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:06,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:05:06,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:06,293 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 07:05:06,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:05:06,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010860249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:06,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:05:06,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:05:06,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116864194] [2023-08-04 07:05:06,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:06,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:05:06,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:06,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:05:06,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:05:06,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 201 [2023-08-04 07:05:06,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:06,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:06,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 201 [2023-08-04 07:05:06,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:08,950 INFO L124 PetriNetUnfolderBase]: 30734/43106 cut-off events. [2023-08-04 07:05:08,951 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 07:05:09,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85361 conditions, 43106 events. 30734/43106 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1508. Compared 278963 event pairs, 23582 based on Foata normal form. 0/41374 useless extension candidates. Maximal degree in co-relation 24260. Up to 37757 conditions per place. [2023-08-04 07:05:09,220 INFO L140 encePairwiseOnDemand]: 198/201 looper letters, 41 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 07:05:09,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 228 flow [2023-08-04 07:05:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:09,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-04 07:05:09,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6019900497512438 [2023-08-04 07:05:09,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-04 07:05:09,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-04 07:05:09,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:09,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-04 07:05:09,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:09,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:09,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:09,229 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 118 flow. Second operand 3 states and 363 transitions. [2023-08-04 07:05:09,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 228 flow [2023-08-04 07:05:09,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:05:09,233 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 128 flow [2023-08-04 07:05:09,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-08-04 07:05:09,235 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-04 07:05:09,235 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 128 flow [2023-08-04 07:05:09,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:09,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:09,235 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 07:05:09,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 07:05:09,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:09,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:09,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1321727016, now seen corresponding path program 1 times [2023-08-04 07:05:09,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:09,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815532944] [2023-08-04 07:05:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:09,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:09,511 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 07:05:09,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:09,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815532944] [2023-08-04 07:05:09,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815532944] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563964796] [2023-08-04 07:05:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:09,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:09,517 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 07:05:09,542 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 07:05:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:09,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:05:09,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:09,621 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 07:05:09,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:05:09,649 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 07:05:09,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563964796] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:05:09,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:05:09,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 07:05:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700035283] [2023-08-04 07:05:09,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:05:09,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:05:09,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:05:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:05:09,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 201 [2023-08-04 07:05:09,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:09,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:09,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 201 [2023-08-04 07:05:09,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:11,633 INFO L124 PetriNetUnfolderBase]: 24232/33704 cut-off events. [2023-08-04 07:05:11,633 INFO L125 PetriNetUnfolderBase]: For 3705/3705 co-relation queries the response was YES. [2023-08-04 07:05:11,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69593 conditions, 33704 events. 24232/33704 cut-off events. For 3705/3705 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 207351 event pairs, 14820 based on Foata normal form. 3/33679 useless extension candidates. Maximal degree in co-relation 24747. Up to 31258 conditions per place. [2023-08-04 07:05:11,839 INFO L140 encePairwiseOnDemand]: 197/201 looper letters, 36 selfloop transitions, 3 changer transitions 1/47 dead transitions. [2023-08-04 07:05:11,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 224 flow [2023-08-04 07:05:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:05:11,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:05:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-08-04 07:05:11,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5758706467661692 [2023-08-04 07:05:11,841 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-08-04 07:05:11,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-08-04 07:05:11,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:11,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-08-04 07:05:11,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:11,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:11,849 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:11,849 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 128 flow. Second operand 4 states and 463 transitions. [2023-08-04 07:05:11,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 224 flow [2023-08-04 07:05:11,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:05:11,856 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 140 flow [2023-08-04 07:05:11,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 07:05:11,857 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-08-04 07:05:11,857 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 140 flow [2023-08-04 07:05:11,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:11,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:11,858 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:05:11,869 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 07:05:12,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:12,070 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:12,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:12,070 INFO L85 PathProgramCache]: Analyzing trace with hash -851505018, now seen corresponding path program 1 times [2023-08-04 07:05:12,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:12,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144884973] [2023-08-04 07:05:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:12,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:05:12,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:12,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144884973] [2023-08-04 07:05:12,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144884973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:12,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975786263] [2023-08-04 07:05:12,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:12,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:12,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:12,145 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 07:05:12,169 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 07:05:12,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:12,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:05:12,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:05:12,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:05:12,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 07:05:12,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975786263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:05:12,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:05:12,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:05:12,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348277660] [2023-08-04 07:05:12,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:05:12,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:05:12,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:12,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:05:12,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:05:12,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 201 [2023-08-04 07:05:12,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:12,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:12,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 201 [2023-08-04 07:05:12,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:14,119 INFO L124 PetriNetUnfolderBase]: 19198/26422 cut-off events. [2023-08-04 07:05:14,120 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 07:05:14,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54308 conditions, 26422 events. 19198/26422 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 154025 event pairs, 11902 based on Foata normal form. 27/26448 useless extension candidates. Maximal degree in co-relation 19274. Up to 23785 conditions per place. [2023-08-04 07:05:14,240 INFO L140 encePairwiseOnDemand]: 197/201 looper letters, 44 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 07:05:14,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 268 flow [2023-08-04 07:05:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:05:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:05:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 471 transitions. [2023-08-04 07:05:14,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585820895522388 [2023-08-04 07:05:14,242 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 471 transitions. [2023-08-04 07:05:14,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 471 transitions. [2023-08-04 07:05:14,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:14,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 471 transitions. [2023-08-04 07:05:14,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:14,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:14,246 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:14,246 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 140 flow. Second operand 4 states and 471 transitions. [2023-08-04 07:05:14,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 268 flow [2023-08-04 07:05:14,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 261 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:05:14,253 INFO L231 Difference]: Finished difference. Result has 62 places, 39 transitions, 147 flow [2023-08-04 07:05:14,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=62, PETRI_TRANSITIONS=39} [2023-08-04 07:05:14,254 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2023-08-04 07:05:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 39 transitions, 147 flow [2023-08-04 07:05:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.8) internal successors, (549), 5 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:14,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:14,255 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:05:14,263 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 07:05:14,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:14,460 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:14,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash -880526222, now seen corresponding path program 1 times [2023-08-04 07:05:14,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:14,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658489028] [2023-08-04 07:05:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:14,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:14,521 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 07:05:14,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:14,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658489028] [2023-08-04 07:05:14,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658489028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:14,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903748989] [2023-08-04 07:05:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:14,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:14,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:14,523 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 07:05:14,525 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 07:05:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:14,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:05:14,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:14,630 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 07:05:14,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:05:14,644 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 07:05:14,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903748989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:05:14,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:05:14,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:05:14,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031879036] [2023-08-04 07:05:14,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:05:14,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:05:14,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:14,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:05:14,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:05:14,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 201 [2023-08-04 07:05:14,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:14,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:14,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 201 [2023-08-04 07:05:14,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:16,044 INFO L124 PetriNetUnfolderBase]: 17362/23128 cut-off events. [2023-08-04 07:05:16,045 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 07:05:16,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48673 conditions, 23128 events. 17362/23128 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 124390 event pairs, 6886 based on Foata normal form. 243/23370 useless extension candidates. Maximal degree in co-relation 17270. Up to 11794 conditions per place. [2023-08-04 07:05:16,201 INFO L140 encePairwiseOnDemand]: 197/201 looper letters, 52 selfloop transitions, 3 changer transitions 1/63 dead transitions. [2023-08-04 07:05:16,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 307 flow [2023-08-04 07:05:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:05:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:05:16,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-04 07:05:16,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595771144278607 [2023-08-04 07:05:16,204 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-04 07:05:16,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-04 07:05:16,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:16,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-04 07:05:16,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,207 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,207 INFO L175 Difference]: Start difference. First operand has 62 places, 39 transitions, 147 flow. Second operand 4 states and 479 transitions. [2023-08-04 07:05:16,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 307 flow [2023-08-04 07:05:16,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 300 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:05:16,213 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 154 flow [2023-08-04 07:05:16,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-08-04 07:05:16,213 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-04 07:05:16,214 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 154 flow [2023-08-04 07:05:16,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.0) internal successors, (550), 5 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:16,214 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] [2023-08-04 07:05:16,223 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 07:05:16,423 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,SelfDestructingSolverStorable11 [2023-08-04 07:05:16,423 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:16,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1494863992, now seen corresponding path program 1 times [2023-08-04 07:05:16,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:16,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671135231] [2023-08-04 07:05:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:16,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:05:16,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:16,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671135231] [2023-08-04 07:05:16,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671135231] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:16,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:05:16,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:05:16,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708912140] [2023-08-04 07:05:16,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:16,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:05:16,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:16,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:05:16,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:05:16,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 201 [2023-08-04 07:05:16,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:16,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:16,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 201 [2023-08-04 07:05:16,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:22,770 INFO L124 PetriNetUnfolderBase]: 83185/105848 cut-off events. [2023-08-04 07:05:22,770 INFO L125 PetriNetUnfolderBase]: For 51382/51382 co-relation queries the response was YES. [2023-08-04 07:05:23,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242126 conditions, 105848 events. 83185/105848 cut-off events. For 51382/51382 co-relation queries the response was YES. Maximal size of possible extension queue 3206. Compared 573431 event pairs, 34056 based on Foata normal form. 2161/107929 useless extension candidates. Maximal degree in co-relation 132639. Up to 60595 conditions per place. [2023-08-04 07:05:23,290 INFO L140 encePairwiseOnDemand]: 189/201 looper letters, 58 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2023-08-04 07:05:23,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 428 flow [2023-08-04 07:05:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:23,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2023-08-04 07:05:23,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.593698175787728 [2023-08-04 07:05:23,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2023-08-04 07:05:23,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2023-08-04 07:05:23,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:23,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2023-08-04 07:05:23,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:23,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:23,296 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:23,296 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 154 flow. Second operand 3 states and 358 transitions. [2023-08-04 07:05:23,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 428 flow [2023-08-04 07:05:23,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 72 transitions, 414 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:05:23,396 INFO L231 Difference]: Finished difference. Result has 65 places, 49 transitions, 233 flow [2023-08-04 07:05:23,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=233, PETRI_PLACES=65, PETRI_TRANSITIONS=49} [2023-08-04 07:05:23,396 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 16 predicate places. [2023-08-04 07:05:23,397 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 49 transitions, 233 flow [2023-08-04 07:05:23,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:23,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:23,397 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] [2023-08-04 07:05:23,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 07:05:23,397 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:23,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:23,398 INFO L85 PathProgramCache]: Analyzing trace with hash 903855999, now seen corresponding path program 1 times [2023-08-04 07:05:23,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:23,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983629295] [2023-08-04 07:05:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:23,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:05:23,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:23,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983629295] [2023-08-04 07:05:23,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983629295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:23,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:05:23,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:05:23,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128254691] [2023-08-04 07:05:23,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:23,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:05:23,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:23,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:05:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:05:23,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 201 [2023-08-04 07:05:23,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 49 transitions, 233 flow. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:23,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:23,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 201 [2023-08-04 07:05:23,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:29,883 INFO L124 PetriNetUnfolderBase]: 82529/104426 cut-off events. [2023-08-04 07:05:29,884 INFO L125 PetriNetUnfolderBase]: For 88413/88413 co-relation queries the response was YES. [2023-08-04 07:05:30,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 313017 conditions, 104426 events. 82529/104426 cut-off events. For 88413/88413 co-relation queries the response was YES. Maximal size of possible extension queue 3225. Compared 566570 event pairs, 8329 based on Foata normal form. 55/104454 useless extension candidates. Maximal degree in co-relation 214372. Up to 59249 conditions per place. [2023-08-04 07:05:30,779 INFO L140 encePairwiseOnDemand]: 189/201 looper letters, 86 selfloop transitions, 19 changer transitions 0/108 dead transitions. [2023-08-04 07:05:30,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 108 transitions, 737 flow [2023-08-04 07:05:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:05:30,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:05:30,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 480 transitions. [2023-08-04 07:05:30,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5970149253731343 [2023-08-04 07:05:30,781 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 480 transitions. [2023-08-04 07:05:30,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 480 transitions. [2023-08-04 07:05:30,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:30,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 480 transitions. [2023-08-04 07:05:30,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:30,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:30,784 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:30,784 INFO L175 Difference]: Start difference. First operand has 65 places, 49 transitions, 233 flow. Second operand 4 states and 480 transitions. [2023-08-04 07:05:30,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 108 transitions, 737 flow [2023-08-04 07:05:30,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 108 transitions, 695 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:05:30,971 INFO L231 Difference]: Finished difference. Result has 69 places, 63 transitions, 365 flow [2023-08-04 07:05:30,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=365, PETRI_PLACES=69, PETRI_TRANSITIONS=63} [2023-08-04 07:05:30,972 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 20 predicate places. [2023-08-04 07:05:30,972 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 63 transitions, 365 flow [2023-08-04 07:05:30,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:30,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:30,972 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] [2023-08-04 07:05:30,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 07:05:30,972 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:30,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:30,973 INFO L85 PathProgramCache]: Analyzing trace with hash 903855906, now seen corresponding path program 1 times [2023-08-04 07:05:30,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:30,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877368481] [2023-08-04 07:05:30,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:30,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:05:31,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:31,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877368481] [2023-08-04 07:05:31,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877368481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:31,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:05:31,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:05:31,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918599454] [2023-08-04 07:05:31,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:31,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:05:31,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:31,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:05:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:05:31,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 201 [2023-08-04 07:05:31,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 63 transitions, 365 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:31,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:31,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 201 [2023-08-04 07:05:31,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:37,806 INFO L124 PetriNetUnfolderBase]: 74672/96763 cut-off events. [2023-08-04 07:05:37,806 INFO L125 PetriNetUnfolderBase]: For 152173/154687 co-relation queries the response was YES. [2023-08-04 07:05:38,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315249 conditions, 96763 events. 74672/96763 cut-off events. For 152173/154687 co-relation queries the response was YES. Maximal size of possible extension queue 3299. Compared 548080 event pairs, 45060 based on Foata normal form. 1398/97149 useless extension candidates. Maximal degree in co-relation 315157. Up to 91118 conditions per place. [2023-08-04 07:05:38,504 INFO L140 encePairwiseOnDemand]: 195/201 looper letters, 80 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2023-08-04 07:05:38,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 100 transitions, 756 flow [2023-08-04 07:05:38,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-04 07:05:38,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202321724709784 [2023-08-04 07:05:38,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-04 07:05:38,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-04 07:05:38,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:38,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-04 07:05:38,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:38,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:38,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:38,509 INFO L175 Difference]: Start difference. First operand has 69 places, 63 transitions, 365 flow. Second operand 3 states and 374 transitions. [2023-08-04 07:05:38,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 100 transitions, 756 flow [2023-08-04 07:05:38,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 756 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:05:38,798 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 458 flow [2023-08-04 07:05:38,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=458, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2023-08-04 07:05:38,799 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 23 predicate places. [2023-08-04 07:05:38,799 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 458 flow [2023-08-04 07:05:38,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:38,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:38,800 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] [2023-08-04 07:05:38,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 07:05:38,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:38,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:38,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1936106745, now seen corresponding path program 1 times [2023-08-04 07:05:38,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:38,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829152497] [2023-08-04 07:05:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:05:38,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829152497] [2023-08-04 07:05:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829152497] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:05:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987802290] [2023-08-04 07:05:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:38,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:05:38,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:05:38,977 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 07:05:38,980 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 07:05:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:39,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 07:05:39,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:05:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:05:39,114 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:05:39,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987802290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:39,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:05:39,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-04 07:05:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351094191] [2023-08-04 07:05:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:05:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:05:39,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 07:05:39,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 201 [2023-08-04 07:05:39,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 458 flow. Second operand has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:39,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:39,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 201 [2023-08-04 07:05:39,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:45,260 INFO L124 PetriNetUnfolderBase]: 66601/87231 cut-off events. [2023-08-04 07:05:45,260 INFO L125 PetriNetUnfolderBase]: For 194299/206963 co-relation queries the response was YES. [2023-08-04 07:05:45,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292802 conditions, 87231 events. 66601/87231 cut-off events. For 194299/206963 co-relation queries the response was YES. Maximal size of possible extension queue 3739. Compared 521441 event pairs, 11207 based on Foata normal form. 5193/89987 useless extension candidates. Maximal degree in co-relation 206066. Up to 64628 conditions per place. [2023-08-04 07:05:45,958 INFO L140 encePairwiseOnDemand]: 192/201 looper letters, 139 selfloop transitions, 14 changer transitions 0/174 dead transitions. [2023-08-04 07:05:45,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 174 transitions, 1377 flow [2023-08-04 07:05:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 07:05:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 07:05:45,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 581 transitions. [2023-08-04 07:05:45,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5781094527363184 [2023-08-04 07:05:45,960 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 581 transitions. [2023-08-04 07:05:45,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 581 transitions. [2023-08-04 07:05:45,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:45,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 581 transitions. [2023-08-04 07:05:45,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.2) internal successors, (581), 5 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:45,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:45,964 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 201.0) internal successors, (1206), 6 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:45,964 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 458 flow. Second operand 5 states and 581 transitions. [2023-08-04 07:05:45,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 174 transitions, 1377 flow [2023-08-04 07:05:46,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 174 transitions, 1360 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:05:46,121 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 558 flow [2023-08-04 07:05:46,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=558, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2023-08-04 07:05:46,122 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 29 predicate places. [2023-08-04 07:05:46,122 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 558 flow [2023-08-04 07:05:46,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.75) internal successors, (419), 4 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:46,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:46,122 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] [2023-08-04 07:05:46,128 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 07:05:46,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 07:05:46,328 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:46,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:46,328 INFO L85 PathProgramCache]: Analyzing trace with hash 427796394, now seen corresponding path program 1 times [2023-08-04 07:05:46,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:46,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785669831] [2023-08-04 07:05:46,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:46,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:05:46,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:46,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785669831] [2023-08-04 07:05:46,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785669831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:46,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:05:46,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:05:46,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911582175] [2023-08-04 07:05:46,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:46,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:05:46,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:46,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:05:46,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:05:46,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 201 [2023-08-04 07:05:46,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 558 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:46,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:46,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 201 [2023-08-04 07:05:46,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:05:54,222 INFO L124 PetriNetUnfolderBase]: 72559/96583 cut-off events. [2023-08-04 07:05:54,223 INFO L125 PetriNetUnfolderBase]: For 226936/229166 co-relation queries the response was YES. [2023-08-04 07:05:54,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402436 conditions, 96583 events. 72559/96583 cut-off events. For 226936/229166 co-relation queries the response was YES. Maximal size of possible extension queue 3632. Compared 597032 event pairs, 10232 based on Foata normal form. 928/95707 useless extension candidates. Maximal degree in co-relation 284075. Up to 75041 conditions per place. [2023-08-04 07:05:54,994 INFO L140 encePairwiseOnDemand]: 197/201 looper letters, 88 selfloop transitions, 7 changer transitions 6/122 dead transitions. [2023-08-04 07:05:54,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 1003 flow [2023-08-04 07:05:54,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:05:54,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:05:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 368 transitions. [2023-08-04 07:05:54,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102819237147595 [2023-08-04 07:05:54,996 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 368 transitions. [2023-08-04 07:05:54,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 368 transitions. [2023-08-04 07:05:54,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:05:54,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 368 transitions. [2023-08-04 07:05:54,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:54,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:54,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 201.0) internal successors, (804), 4 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:54,998 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 558 flow. Second operand 3 states and 368 transitions. [2023-08-04 07:05:54,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 1003 flow [2023-08-04 07:05:55,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 992 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:05:55,341 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 610 flow [2023-08-04 07:05:55,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=610, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2023-08-04 07:05:55,342 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 31 predicate places. [2023-08-04 07:05:55,342 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 610 flow [2023-08-04 07:05:55,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:55,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:05:55,342 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] [2023-08-04 07:05:55,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 07:05:55,342 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:05:55,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:05:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -7176376, now seen corresponding path program 1 times [2023-08-04 07:05:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:05:55,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002591470] [2023-08-04 07:05:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:05:55,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:05:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:05:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:05:55,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:05:55,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002591470] [2023-08-04 07:05:55,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002591470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:05:55,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:05:55,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 07:05:55,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130371573] [2023-08-04 07:05:55,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:05:55,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:05:55,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:05:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:05:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:05:55,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 201 [2023-08-04 07:05:55,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 610 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:05:55,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:05:55,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 201 [2023-08-04 07:05:55,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:07,784 INFO L124 PetriNetUnfolderBase]: 123987/159877 cut-off events. [2023-08-04 07:06:07,784 INFO L125 PetriNetUnfolderBase]: For 434070/434070 co-relation queries the response was YES. [2023-08-04 07:06:08,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 693727 conditions, 159877 events. 123987/159877 cut-off events. For 434070/434070 co-relation queries the response was YES. Maximal size of possible extension queue 5236. Compared 941282 event pairs, 24835 based on Foata normal form. 920/160760 useless extension candidates. Maximal degree in co-relation 693601. Up to 68976 conditions per place. [2023-08-04 07:06:08,913 INFO L140 encePairwiseOnDemand]: 189/201 looper letters, 123 selfloop transitions, 37 changer transitions 15/178 dead transitions. [2023-08-04 07:06:08,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 178 transitions, 1504 flow [2023-08-04 07:06:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:06:08,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:06:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-08-04 07:06:08,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044776119402985 [2023-08-04 07:06:08,914 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-08-04 07:06:08,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-08-04 07:06:08,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:08,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-08-04 07:06:08,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:08,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:08,917 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:08,917 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 610 flow. Second operand 4 states and 486 transitions. [2023-08-04 07:06:08,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 178 transitions, 1504 flow [2023-08-04 07:06:10,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 178 transitions, 1495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:06:10,007 INFO L231 Difference]: Finished difference. Result has 85 places, 97 transitions, 855 flow [2023-08-04 07:06:10,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=603, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=855, PETRI_PLACES=85, PETRI_TRANSITIONS=97} [2023-08-04 07:06:10,007 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 36 predicate places. [2023-08-04 07:06:10,007 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 97 transitions, 855 flow [2023-08-04 07:06:10,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:10,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:10,008 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] [2023-08-04 07:06:10,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 07:06:10,008 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:10,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:10,008 INFO L85 PathProgramCache]: Analyzing trace with hash -220354876, now seen corresponding path program 1 times [2023-08-04 07:06:10,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:10,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126059132] [2023-08-04 07:06:10,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:10,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:06:10,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:10,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126059132] [2023-08-04 07:06:10,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126059132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:06:10,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629283523] [2023-08-04 07:06:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:10,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:10,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:06:10,135 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 07:06:10,138 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 07:06:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:10,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 07:06:10,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:06:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:06:10,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:06:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 07:06:10,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629283523] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:06:10,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:06:10,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 15 [2023-08-04 07:06:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663513645] [2023-08-04 07:06:10,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:06:10,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 07:06:10,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 07:06:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2023-08-04 07:06:10,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 201 [2023-08-04 07:06:10,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 97 transitions, 855 flow. Second operand has 17 states, 17 states have (on average 91.11764705882354) internal successors, (1549), 17 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:10,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:10,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 201 [2023-08-04 07:06:10,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:06:30,434 INFO L124 PetriNetUnfolderBase]: 160733/209205 cut-off events. [2023-08-04 07:06:30,434 INFO L125 PetriNetUnfolderBase]: For 1071424/1071424 co-relation queries the response was YES. [2023-08-04 07:06:31,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1014040 conditions, 209205 events. 160733/209205 cut-off events. For 1071424/1071424 co-relation queries the response was YES. Maximal size of possible extension queue 7073. Compared 1310042 event pairs, 1338 based on Foata normal form. 4014/213127 useless extension candidates. Maximal degree in co-relation 1013898. Up to 89043 conditions per place. [2023-08-04 07:06:32,605 INFO L140 encePairwiseOnDemand]: 182/201 looper letters, 375 selfloop transitions, 515 changer transitions 442/1335 dead transitions. [2023-08-04 07:06:32,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 1335 transitions, 13951 flow [2023-08-04 07:06:32,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-04 07:06:32,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-04 07:06:32,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4002 transitions. [2023-08-04 07:06:32,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5381202097620008 [2023-08-04 07:06:32,634 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4002 transitions. [2023-08-04 07:06:32,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4002 transitions. [2023-08-04 07:06:32,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:06:32,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4002 transitions. [2023-08-04 07:06:32,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 108.16216216216216) internal successors, (4002), 37 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:32,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 201.0) internal successors, (7638), 38 states have internal predecessors, (7638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:32,669 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 201.0) internal successors, (7638), 38 states have internal predecessors, (7638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:32,669 INFO L175 Difference]: Start difference. First operand has 85 places, 97 transitions, 855 flow. Second operand 37 states and 4002 transitions. [2023-08-04 07:06:32,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 1335 transitions, 13951 flow [2023-08-04 07:06:37,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 1335 transitions, 13945 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-04 07:06:37,197 INFO L231 Difference]: Finished difference. Result has 144 places, 627 transitions, 7974 flow [2023-08-04 07:06:37,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=201, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7974, PETRI_PLACES=144, PETRI_TRANSITIONS=627} [2023-08-04 07:06:37,197 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 95 predicate places. [2023-08-04 07:06:37,198 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 627 transitions, 7974 flow [2023-08-04 07:06:37,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 91.11764705882354) internal successors, (1549), 17 states have internal predecessors, (1549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:37,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:06:37,199 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] [2023-08-04 07:06:37,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 07:06:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:06:37,405 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:06:37,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:06:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1209577109, now seen corresponding path program 1 times [2023-08-04 07:06:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:06:37,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141548713] [2023-08-04 07:06:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:06:37,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:06:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:06:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:06:37,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:06:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141548713] [2023-08-04 07:06:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141548713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:06:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:06:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 07:06:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550657595] [2023-08-04 07:06:37,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:06:37,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:06:37,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:06:37,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:06:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:06:37,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 201 [2023-08-04 07:06:37,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 627 transitions, 7974 flow. Second operand has 4 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:06:37,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:06:37,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 201 [2023-08-04 07:06:37,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:07:08,742 INFO L124 PetriNetUnfolderBase]: 158125/208360 cut-off events. [2023-08-04 07:07:08,743 INFO L125 PetriNetUnfolderBase]: For 2525651/2525651 co-relation queries the response was YES. [2023-08-04 07:07:10,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444420 conditions, 208360 events. 158125/208360 cut-off events. For 2525651/2525651 co-relation queries the response was YES. Maximal size of possible extension queue 7996. Compared 1354821 event pairs, 11561 based on Foata normal form. 662/209002 useless extension candidates. Maximal degree in co-relation 1443656. Up to 97732 conditions per place. [2023-08-04 07:07:11,339 INFO L140 encePairwiseOnDemand]: 189/201 looper letters, 610 selfloop transitions, 239 changer transitions 77/929 dead transitions. [2023-08-04 07:07:11,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 929 transitions, 13348 flow [2023-08-04 07:07:11,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:07:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:07:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 476 transitions. [2023-08-04 07:07:11,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5920398009950248 [2023-08-04 07:07:11,341 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 476 transitions. [2023-08-04 07:07:11,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 476 transitions. [2023-08-04 07:07:11,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:07:11,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 476 transitions. [2023-08-04 07:07:11,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:11,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:11,344 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:07:11,344 INFO L175 Difference]: Start difference. First operand has 144 places, 627 transitions, 7974 flow. Second operand 4 states and 476 transitions. [2023-08-04 07:07:11,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 929 transitions, 13348 flow