/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_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:34:01,351 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:34:01,425 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:34:01,430 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:34:01,430 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:34:01,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:34:01,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:34:01,462 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:34:01,463 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:34:01,466 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:34:01,467 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:34:01,467 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:34:01,468 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:34:01,469 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:34:01,469 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:34:01,469 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:34:01,469 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:34:01,470 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:34:01,470 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:34:01,470 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:34:01,470 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:34:01,471 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:34:01,471 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:34:01,471 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:34:01,471 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:34:01,471 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:34:01,472 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:34:01,472 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:34:01,472 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:34:01,472 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:34:01,473 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:34:01,474 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:34:01,474 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:34:01,474 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:34:01,475 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:34:01,475 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:34:01,475 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:34:01,475 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:34:01,475 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:34:01,476 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:34:01,476 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:34:01,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:34:01,713 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:34:01,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:34:01,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:34:01,740 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:34:01,740 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:34:01,741 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:34:02,950 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:34:03,180 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:34:03,180 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:34:03,198 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/292bfeb8a/61bdd6204c42402d99d1ce289b7dbde4/FLAGc8c931525 [2023-08-04 07:34:03,211 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/292bfeb8a/61bdd6204c42402d99d1ce289b7dbde4 [2023-08-04 07:34:03,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:34:03,217 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:34:03,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:34:03,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:34:03,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:34:03,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,224 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c1a0e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03, skipping insertion in model container [2023-08-04 07:34:03,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,259 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:34:03,429 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_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 07:34:03,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:34:03,609 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:34:03,622 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_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 07:34:03,644 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:34:03,646 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:34:03,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:34:03,700 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:34:03,700 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:34:03,705 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:34:03,706 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03 WrapperNode [2023-08-04 07:34:03,706 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:34:03,707 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:34:03,707 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:34:03,707 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:34:03,713 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,725 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,745 INFO L138 Inliner]: procedures = 177, calls = 66, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 117 [2023-08-04 07:34:03,746 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:34:03,746 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:34:03,746 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:34:03,746 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:34:03,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,755 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,771 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,779 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,783 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,784 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,785 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,788 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:34:03,788 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:34:03,788 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:34:03,789 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:34:03,789 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (1/1) ... [2023-08-04 07:34:03,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:34:03,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:34:03,825 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 07:34:03,827 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 07:34:03,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:34:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:34:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:34:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:34:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:34:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:34:03,851 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:34:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:34:03,851 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:34:03,851 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:34:03,852 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:34:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:34:03,852 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:34:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:34:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:34:03,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:34:03,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:34:03,853 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 07:34:03,960 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:34:03,962 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:34:04,165 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:34:04,171 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:34:04,171 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:34:04,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:34:04 BoogieIcfgContainer [2023-08-04 07:34:04,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:34:04,176 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:34:04,176 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:34:04,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:34:04,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:34:03" (1/3) ... [2023-08-04 07:34:04,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ccc9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:34:04, skipping insertion in model container [2023-08-04 07:34:04,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:34:03" (2/3) ... [2023-08-04 07:34:04,180 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78ccc9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:34:04, skipping insertion in model container [2023-08-04 07:34:04,180 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:34:04" (3/3) ... [2023-08-04 07:34:04,181 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 07:34:04,188 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:34:04,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:34:04,196 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:34:04,196 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:34:04,267 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:34:04,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 284 flow [2023-08-04 07:34:04,510 INFO L124 PetriNetUnfolderBase]: 62/873 cut-off events. [2023-08-04 07:34:04,511 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:04,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 873 events. 62/873 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5406 event pairs, 0 based on Foata normal form. 0/765 useless extension candidates. Maximal degree in co-relation 518. Up to 32 conditions per place. [2023-08-04 07:34:04,530 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 132 transitions, 284 flow [2023-08-04 07:34:04,536 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 114 transitions, 240 flow [2023-08-04 07:34:04,539 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:34:04,557 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 114 transitions, 240 flow [2023-08-04 07:34:04,565 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 114 transitions, 240 flow [2023-08-04 07:34:04,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 114 transitions, 240 flow [2023-08-04 07:34:04,627 INFO L124 PetriNetUnfolderBase]: 46/634 cut-off events. [2023-08-04 07:34:04,627 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:04,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 634 events. 46/634 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3544 event pairs, 0 based on Foata normal form. 0/558 useless extension candidates. Maximal degree in co-relation 392. Up to 32 conditions per place. [2023-08-04 07:34:04,638 INFO L119 LiptonReduction]: Number of co-enabled transitions 2640 [2023-08-04 07:34:06,886 INFO L134 LiptonReduction]: Checked pairs total: 4342 [2023-08-04 07:34:06,886 INFO L136 LiptonReduction]: Total number of compositions: 93 [2023-08-04 07:34:06,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:34:06,915 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;@1e8bbc56, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:34:06,916 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:34:06,920 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:34:06,920 INFO L124 PetriNetUnfolderBase]: 0/16 cut-off events. [2023-08-04 07:34:06,920 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:06,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:06,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:34:06,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:34:06,926 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:06,927 INFO L85 PathProgramCache]: Analyzing trace with hash 647204458, now seen corresponding path program 1 times [2023-08-04 07:34:06,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:06,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782245090] [2023-08-04 07:34:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:06,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:07,173 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 07:34:07,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:07,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782245090] [2023-08-04 07:34:07,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782245090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:34:07,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:34:07,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:34:07,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413134448] [2023-08-04 07:34:07,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:34:07,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:34:07,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:34:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:34:07,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 225 [2023-08-04 07:34:07,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:07,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:07,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 225 [2023-08-04 07:34:07,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:34:07,589 INFO L124 PetriNetUnfolderBase]: 2144/3512 cut-off events. [2023-08-04 07:34:07,589 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 07:34:07,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6878 conditions, 3512 events. 2144/3512 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 21200 event pairs, 1422 based on Foata normal form. 0/3233 useless extension candidates. Maximal degree in co-relation 6864. Up to 3228 conditions per place. [2023-08-04 07:34:07,613 INFO L140 encePairwiseOnDemand]: 221/225 looper letters, 26 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 07:34:07,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 136 flow [2023-08-04 07:34:07,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:34:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:34:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-04 07:34:07,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659259259259259 [2023-08-04 07:34:07,632 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-04 07:34:07,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-04 07:34:07,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:34:07,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-04 07:34:07,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:07,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:07,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:07,648 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 74 flow. Second operand 3 states and 382 transitions. [2023-08-04 07:34:07,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 136 flow [2023-08-04 07:34:07,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 33 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:34:07,653 INFO L231 Difference]: Finished difference. Result has 42 places, 30 transitions, 80 flow [2023-08-04 07:34:07,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=42, PETRI_TRANSITIONS=30} [2023-08-04 07:34:07,657 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 3 predicate places. [2023-08-04 07:34:07,657 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 30 transitions, 80 flow [2023-08-04 07:34:07,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:07,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:07,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:34:07,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:34:07,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:34:07,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:07,659 INFO L85 PathProgramCache]: Analyzing trace with hash 382522739, now seen corresponding path program 1 times [2023-08-04 07:34:07,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:07,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799586335] [2023-08-04 07:34:07,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:07,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:07,744 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 07:34:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799586335] [2023-08-04 07:34:07,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799586335] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:34:07,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869829774] [2023-08-04 07:34:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:07,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:34:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:34:07,748 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 07:34:07,785 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 07:34:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:07,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:34:07,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:34:07,870 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 07:34:07,871 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:34:07,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869829774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:34:07,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:34:07,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:34:07,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520349583] [2023-08-04 07:34:07,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:34:07,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:34:07,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:07,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:34:07,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:34:07,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 225 [2023-08-04 07:34:07,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 30 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:07,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:07,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 225 [2023-08-04 07:34:07,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:34:08,109 INFO L124 PetriNetUnfolderBase]: 1748/2768 cut-off events. [2023-08-04 07:34:08,109 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:34:08,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 2768 events. 1748/2768 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15454 event pairs, 1204 based on Foata normal form. 0/2569 useless extension candidates. Maximal degree in co-relation 5442. Up to 2551 conditions per place. [2023-08-04 07:34:08,126 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 28 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 07:34:08,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 152 flow [2023-08-04 07:34:08,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:34:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:34:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-04 07:34:08,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674074074074074 [2023-08-04 07:34:08,128 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-04 07:34:08,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-04 07:34:08,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:34:08,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-04 07:34:08,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:08,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:08,131 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:08,131 INFO L175 Difference]: Start difference. First operand has 42 places, 30 transitions, 80 flow. Second operand 3 states and 383 transitions. [2023-08-04 07:34:08,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 152 flow [2023-08-04 07:34:08,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:34:08,133 INFO L231 Difference]: Finished difference. Result has 43 places, 30 transitions, 84 flow [2023-08-04 07:34:08,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=43, PETRI_TRANSITIONS=30} [2023-08-04 07:34:08,134 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 4 predicate places. [2023-08-04 07:34:08,134 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 30 transitions, 84 flow [2023-08-04 07:34:08,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:08,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:08,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:34:08,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:34:08,340 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 07:34:08,340 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:34:08,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:08,341 INFO L85 PathProgramCache]: Analyzing trace with hash 462482129, now seen corresponding path program 1 times [2023-08-04 07:34:08,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:08,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646664948] [2023-08-04 07:34:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:08,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:08,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:08,440 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 07:34:08,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:08,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646664948] [2023-08-04 07:34:08,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646664948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:34:08,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108553589] [2023-08-04 07:34:08,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:08,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:34:08,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:34:08,443 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 07:34:08,446 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 07:34:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:08,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:34:08,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:34:08,568 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 07:34:08,568 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:34:08,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108553589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:34:08,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:34:08,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:34:08,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140480530] [2023-08-04 07:34:08,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:34:08,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:34:08,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:08,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:34:08,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:34:08,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 225 [2023-08-04 07:34:08,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 30 transitions, 84 flow. Second operand has 3 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 07:34:08,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:08,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 225 [2023-08-04 07:34:08,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:34:08,818 INFO L124 PetriNetUnfolderBase]: 1448/2252 cut-off events. [2023-08-04 07:34:08,819 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 07:34:08,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4481 conditions, 2252 events. 1448/2252 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11817 event pairs, 1010 based on Foata normal form. 0/2113 useless extension candidates. Maximal degree in co-relation 4464. Up to 2000 conditions per place. [2023-08-04 07:34:08,831 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 30 selfloop transitions, 2 changer transitions 1/37 dead transitions. [2023-08-04 07:34:08,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 164 flow [2023-08-04 07:34:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:34:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:34:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-04 07:34:08,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2023-08-04 07:34:08,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-04 07:34:08,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-04 07:34:08,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:34:08,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-04 07:34:08,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:08,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:08,836 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:08,836 INFO L175 Difference]: Start difference. First operand has 43 places, 30 transitions, 84 flow. Second operand 3 states and 385 transitions. [2023-08-04 07:34:08,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 164 flow [2023-08-04 07:34:08,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 37 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:34:08,839 INFO L231 Difference]: Finished difference. Result has 44 places, 30 transitions, 88 flow [2023-08-04 07:34:08,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=44, PETRI_TRANSITIONS=30} [2023-08-04 07:34:08,840 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 5 predicate places. [2023-08-04 07:34:08,840 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 30 transitions, 88 flow [2023-08-04 07:34:08,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:34:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:08,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:34:08,852 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 07:34:09,046 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 07:34:09,047 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:34:09,047 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash -707383308, now seen corresponding path program 1 times [2023-08-04 07:34:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:09,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750865775] [2023-08-04 07:34:09,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:09,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:09,127 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 07:34:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750865775] [2023-08-04 07:34:09,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750865775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:34:09,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833600877] [2023-08-04 07:34:09,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:09,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:34:09,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:34:09,130 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 07:34:09,154 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 07:34:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:09,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:34:09,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:34:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:34:09,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:34:09,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833600877] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:34:09,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:34:09,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:34:09,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217720158] [2023-08-04 07:34:09,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:34:09,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:34:09,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:34:09,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:34:09,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 225 [2023-08-04 07:34:09,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 30 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:09,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 225 [2023-08-04 07:34:09,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:34:09,384 INFO L124 PetriNetUnfolderBase]: 1340/2006 cut-off events. [2023-08-04 07:34:09,385 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-04 07:34:09,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4152 conditions, 2006 events. 1340/2006 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9294 event pairs, 935 based on Foata normal form. 0/1921 useless extension candidates. Maximal degree in co-relation 4134. Up to 1538 conditions per place. [2023-08-04 07:34:09,395 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 32 selfloop transitions, 2 changer transitions 1/39 dead transitions. [2023-08-04 07:34:09,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 176 flow [2023-08-04 07:34:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:34:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:34:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-04 07:34:09,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2023-08-04 07:34:09,397 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-04 07:34:09,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-04 07:34:09,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:34:09,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-04 07:34:09,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,400 INFO L175 Difference]: Start difference. First operand has 44 places, 30 transitions, 88 flow. Second operand 3 states and 387 transitions. [2023-08-04 07:34:09,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 176 flow [2023-08-04 07:34:09,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:34:09,402 INFO L231 Difference]: Finished difference. Result has 45 places, 30 transitions, 92 flow [2023-08-04 07:34:09,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=45, PETRI_TRANSITIONS=30} [2023-08-04 07:34:09,403 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-08-04 07:34:09,403 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 30 transitions, 92 flow [2023-08-04 07:34:09,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:09,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:34:09,413 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 07:34:09,608 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 07:34:09,609 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:34:09,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:09,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1724115211, now seen corresponding path program 1 times [2023-08-04 07:34:09,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:09,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878208405] [2023-08-04 07:34:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:09,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:09,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:34:09,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:09,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878208405] [2023-08-04 07:34:09,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878208405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:34:09,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780886601] [2023-08-04 07:34:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:09,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:34:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:34:09,681 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 07:34:09,706 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 07:34:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:09,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:34:09,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:34:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:34:09,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:34:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:34:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780886601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:34:09,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:34:09,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:34:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704370829] [2023-08-04 07:34:09,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:34:09,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:34:09,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:09,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:34:09,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:34:09,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 225 [2023-08-04 07:34:09,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 30 transitions, 92 flow. Second operand has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:09,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 225 [2023-08-04 07:34:09,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:34:09,863 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:34:09,863 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:09,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 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 07:34:09,863 INFO L140 encePairwiseOnDemand]: 222/225 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:34:09,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 43 flow [2023-08-04 07:34:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:34:09,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:34:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2023-08-04 07:34:09,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2023-08-04 07:34:09,865 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2023-08-04 07:34:09,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2023-08-04 07:34:09,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:34:09,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2023-08-04 07:34:09,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,869 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,869 INFO L175 Difference]: Start difference. First operand has 45 places, 30 transitions, 92 flow. Second operand 4 states and 474 transitions. [2023-08-04 07:34:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 43 flow [2023-08-04 07:34:09,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:34:09,870 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 07:34:09,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=225, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=17, 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=20, PETRI_TRANSITIONS=0} [2023-08-04 07:34:09,872 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -19 predicate places. [2023-08-04 07:34:09,872 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 07:34:09,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:09,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:34:09,881 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 07:34:10,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:34:10,081 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:34:10,082 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:34:10,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 284 flow [2023-08-04 07:34:10,139 INFO L124 PetriNetUnfolderBase]: 62/873 cut-off events. [2023-08-04 07:34:10,139 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:10,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 873 events. 62/873 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5406 event pairs, 0 based on Foata normal form. 0/765 useless extension candidates. Maximal degree in co-relation 518. Up to 32 conditions per place. [2023-08-04 07:34:10,141 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 132 transitions, 284 flow [2023-08-04 07:34:10,142 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 102 transitions, 224 flow [2023-08-04 07:34:10,142 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:34:10,142 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 102 transitions, 224 flow [2023-08-04 07:34:10,143 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 102 transitions, 224 flow [2023-08-04 07:34:10,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 102 transitions, 224 flow [2023-08-04 07:34:10,164 INFO L124 PetriNetUnfolderBase]: 14/393 cut-off events. [2023-08-04 07:34:10,164 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:10,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 393 events. 14/393 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1837 event pairs, 0 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 278. Up to 16 conditions per place. [2023-08-04 07:34:10,168 INFO L119 LiptonReduction]: Number of co-enabled transitions 1992 [2023-08-04 07:34:12,078 INFO L134 LiptonReduction]: Checked pairs total: 3897 [2023-08-04 07:34:12,078 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-04 07:34:12,080 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:34:12,087 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;@1e8bbc56, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:34:12,087 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:34:12,089 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:34:12,089 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-04 07:34:12,089 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:34:12,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:12,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:34:12,090 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:34:12,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:12,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1375399624, now seen corresponding path program 1 times [2023-08-04 07:34:12,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:12,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133218903] [2023-08-04 07:34:12,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:12,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:34:12,110 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:34:12,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:34:12,142 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:34:12,143 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:34:12,144 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:34:12,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:34:12,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:34:12,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:34:12,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:34:12,145 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:34:12,147 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:34:12,148 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:34:12,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:34:12,177 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:34:12,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 160 transitions, 368 flow [2023-08-04 07:34:12,553 INFO L124 PetriNetUnfolderBase]: 282/4088 cut-off events. [2023-08-04 07:34:12,553 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:34:12,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4377 conditions, 4088 events. 282/4088 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 39088 event pairs, 0 based on Foata normal form. 0/3605 useless extension candidates. Maximal degree in co-relation 2964. Up to 162 conditions per place. [2023-08-04 07:34:12,578 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 160 transitions, 368 flow [2023-08-04 07:34:12,587 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 142 transitions, 316 flow [2023-08-04 07:34:12,587 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:34:12,588 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 142 transitions, 316 flow [2023-08-04 07:34:12,588 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 142 transitions, 316 flow [2023-08-04 07:34:12,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 142 transitions, 316 flow [2023-08-04 07:34:12,841 INFO L124 PetriNetUnfolderBase]: 201/2914 cut-off events. [2023-08-04 07:34:12,841 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:34:12,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3123 conditions, 2914 events. 201/2914 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 25610 event pairs, 0 based on Foata normal form. 0/2593 useless extension candidates. Maximal degree in co-relation 2169. Up to 162 conditions per place. [2023-08-04 07:34:12,888 INFO L119 LiptonReduction]: Number of co-enabled transitions 6624 [2023-08-04 07:34:14,847 INFO L134 LiptonReduction]: Checked pairs total: 13755 [2023-08-04 07:34:14,847 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-04 07:34:14,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:34:14,849 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;@1e8bbc56, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:34:14,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:34:14,851 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:34:14,851 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 07:34:14,851 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:34:14,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:34:14,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 07:34:14,852 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:34:14,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:34:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1494219981, now seen corresponding path program 1 times [2023-08-04 07:34:14,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:34:14,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570869979] [2023-08-04 07:34:14,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:34:14,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:34:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:34:14,899 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 07:34:14,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:34:14,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570869979] [2023-08-04 07:34:14,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570869979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:34:14,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:34:14,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:34:14,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885746451] [2023-08-04 07:34:14,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:34:14,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:34:14,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:34:14,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:34:14,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:34:14,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 258 [2023-08-04 07:34:14,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:34:14,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:34:14,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 258 [2023-08-04 07:34:14,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:35:06,614 INFO L124 PetriNetUnfolderBase]: 576290/774069 cut-off events. [2023-08-04 07:35:06,615 INFO L125 PetriNetUnfolderBase]: For 20565/20565 co-relation queries the response was YES. [2023-08-04 07:35:09,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510750 conditions, 774069 events. 576290/774069 cut-off events. For 20565/20565 co-relation queries the response was YES. Maximal size of possible extension queue 18207. Compared 6036317 event pairs, 485484 based on Foata normal form. 0/734621 useless extension candidates. Maximal degree in co-relation 444168. Up to 712500 conditions per place. [2023-08-04 07:35:11,925 INFO L140 encePairwiseOnDemand]: 255/258 looper letters, 40 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 07:35:11,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 54 transitions, 224 flow [2023-08-04 07:35:11,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:35:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:35:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-04 07:35:11,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020671834625323 [2023-08-04 07:35:11,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-04 07:35:11,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-04 07:35:11,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:35:11,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-04 07:35:11,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:35:11,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:35:11,931 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:35:11,931 INFO L175 Difference]: Start difference. First operand has 67 places, 50 transitions, 132 flow. Second operand 3 states and 466 transitions. [2023-08-04 07:35:11,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 54 transitions, 224 flow [2023-08-04 07:35:11,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 54 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:35:11,934 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 144 flow [2023-08-04 07:35:11,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-04 07:35:11,934 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-04 07:35:11,935 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 144 flow [2023-08-04 07:35:11,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:35:11,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:35:11,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:35:11,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 07:35:11,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:35:11,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:35:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash 2088625205, now seen corresponding path program 1 times [2023-08-04 07:35:11,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:35:11,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675761532] [2023-08-04 07:35:11,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:35:11,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:35:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:35:11,968 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 07:35:11,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:35:11,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675761532] [2023-08-04 07:35:11,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675761532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:35:11,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656679861] [2023-08-04 07:35:11,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:35:11,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:35:11,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:35:11,977 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 07:35:11,978 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 07:35:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:35:12,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:35:12,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:35:12,058 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 07:35:12,058 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:35:12,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656679861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:35:12,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:35:12,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:35:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788693120] [2023-08-04 07:35:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:35:12,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:35:12,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:35:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:35:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:35:12,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 258 [2023-08-04 07:35:12,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:35:12,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:35:12,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 258 [2023-08-04 07:35:12,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:01,791 INFO L124 PetriNetUnfolderBase]: 543278/724721 cut-off events. [2023-08-04 07:36:01,792 INFO L125 PetriNetUnfolderBase]: For 17991/17991 co-relation queries the response was YES. [2023-08-04 07:36:03,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416132 conditions, 724721 events. 543278/724721 cut-off events. For 17991/17991 co-relation queries the response was YES. Maximal size of possible extension queue 17762. Compared 5549107 event pairs, 459424 based on Foata normal form. 0/690556 useless extension candidates. Maximal degree in co-relation 1416093. Up to 668923 conditions per place. [2023-08-04 07:36:06,641 INFO L140 encePairwiseOnDemand]: 255/258 looper letters, 45 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 07:36:06,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 59 transitions, 254 flow [2023-08-04 07:36:06,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:06,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-04 07:36:06,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6072351421188631 [2023-08-04 07:36:06,643 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-04 07:36:06,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-04 07:36:06,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:06,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-04 07:36:06,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:06,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:06,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:06,646 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 144 flow. Second operand 3 states and 470 transitions. [2023-08-04 07:36:06,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 59 transitions, 254 flow [2023-08-04 07:36:06,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 59 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:36:06,656 INFO L231 Difference]: Finished difference. Result has 72 places, 52 transitions, 154 flow [2023-08-04 07:36:06,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=72, PETRI_TRANSITIONS=52} [2023-08-04 07:36:06,656 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2023-08-04 07:36:06,656 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 52 transitions, 154 flow [2023-08-04 07:36:06,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:06,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:06,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:06,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 07:36:06,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:06,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:06,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:06,862 INFO L85 PathProgramCache]: Analyzing trace with hash -667529922, now seen corresponding path program 1 times [2023-08-04 07:36:06,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:06,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055777394] [2023-08-04 07:36:06,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:06,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:06,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:06,898 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 07:36:06,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:06,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055777394] [2023-08-04 07:36:06,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055777394] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:06,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316843511] [2023-08-04 07:36:06,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:06,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:06,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:06,900 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 07:36:06,904 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 07:36:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:06,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:36:06,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:06,992 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 07:36:06,992 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:36:06,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316843511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:06,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:36:06,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:36:06,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355855290] [2023-08-04 07:36:06,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:07,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 258 [2023-08-04 07:36:07,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 52 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:07,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:07,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 258 [2023-08-04 07:36:07,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:36:54,613 INFO L124 PetriNetUnfolderBase]: 512846/676238 cut-off events. [2023-08-04 07:36:54,614 INFO L125 PetriNetUnfolderBase]: For 15521/15521 co-relation queries the response was YES. [2023-08-04 07:36:56,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326751 conditions, 676238 events. 512846/676238 cut-off events. For 15521/15521 co-relation queries the response was YES. Maximal size of possible extension queue 17352. Compared 5035135 event pairs, 434270 based on Foata normal form. 0/649306 useless extension candidates. Maximal degree in co-relation 393618. Up to 627005 conditions per place. [2023-08-04 07:36:59,141 INFO L140 encePairwiseOnDemand]: 255/258 looper letters, 50 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 07:36:59,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 282 flow [2023-08-04 07:36:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:36:59,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:36:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 07:36:59,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2023-08-04 07:36:59,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 07:36:59,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 07:36:59,143 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:36:59,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 07:36:59,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:59,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:59,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:59,146 INFO L175 Difference]: Start difference. First operand has 72 places, 52 transitions, 154 flow. Second operand 3 states and 474 transitions. [2023-08-04 07:36:59,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 282 flow [2023-08-04 07:36:59,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 64 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:36:59,149 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 164 flow [2023-08-04 07:36:59,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2023-08-04 07:36:59,150 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2023-08-04 07:36:59,150 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 164 flow [2023-08-04 07:36:59,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:36:59,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:36:59,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:36:59,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 07:36:59,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:59,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:36:59,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:36:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1260560820, now seen corresponding path program 1 times [2023-08-04 07:36:59,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:36:59,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506919510] [2023-08-04 07:36:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:59,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:36:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:59,439 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 07:36:59,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:36:59,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506919510] [2023-08-04 07:36:59,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506919510] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:36:59,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48878821] [2023-08-04 07:36:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:36:59,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:36:59,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:36:59,445 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 07:36:59,447 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 07:36:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:36:59,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:36:59,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:36:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:36:59,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:36:59,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48878821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:36:59,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:36:59,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:36:59,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950093399] [2023-08-04 07:36:59,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:36:59,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:36:59,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:36:59,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:36:59,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:36:59,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 258 [2023-08-04 07:36:59,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 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 07:36:59,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:36:59,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 258 [2023-08-04 07:36:59,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:37:46,677 INFO L124 PetriNetUnfolderBase]: 500750/652298 cut-off events. [2023-08-04 07:37:46,677 INFO L125 PetriNetUnfolderBase]: For 10045/10045 co-relation queries the response was YES. [2023-08-04 07:37:48,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291256 conditions, 652298 events. 500750/652298 cut-off events. For 10045/10045 co-relation queries the response was YES. Maximal size of possible extension queue 16685. Compared 4699560 event pairs, 404846 based on Foata normal form. 0/631378 useless extension candidates. Maximal degree in co-relation 380144. Up to 574973 conditions per place. [2023-08-04 07:37:51,151 INFO L140 encePairwiseOnDemand]: 255/258 looper letters, 55 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-04 07:37:51,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 310 flow [2023-08-04 07:37:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:37:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:37:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-04 07:37:51,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6175710594315246 [2023-08-04 07:37:51,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-04 07:37:51,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-04 07:37:51,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:37:51,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-04 07:37:51,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:51,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:51,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:51,157 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 164 flow. Second operand 3 states and 478 transitions. [2023-08-04 07:37:51,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 310 flow [2023-08-04 07:37:51,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:37:51,174 INFO L231 Difference]: Finished difference. Result has 76 places, 54 transitions, 174 flow [2023-08-04 07:37:51,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=76, PETRI_TRANSITIONS=54} [2023-08-04 07:37:51,177 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-08-04 07:37:51,177 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 54 transitions, 174 flow [2023-08-04 07:37:51,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 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 07:37:51,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:37:51,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:37:51,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 07:37:51,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:51,387 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:37:51,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:37:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1456954774, now seen corresponding path program 1 times [2023-08-04 07:37:51,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:37:51,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746248516] [2023-08-04 07:37:51,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:51,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:37:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:37:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746248516] [2023-08-04 07:37:51,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746248516] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:37:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173644484] [2023-08-04 07:37:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:37:51,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:37:51,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:37:51,449 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:37:51,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 07:37:51,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:37:51,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:37:51,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:37:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:51,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:37:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 07:37:51,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173644484] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:37:51,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:37:51,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:37:51,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116949377] [2023-08-04 07:37:51,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:37:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:37:51,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:37:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:37:51,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:37:51,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 258 [2023-08-04 07:37:51,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 54 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:37:51,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:37:51,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 258 [2023-08-04 07:37:51,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:38:30,981 INFO L124 PetriNetUnfolderBase]: 389704/505637 cut-off events. [2023-08-04 07:38:30,982 INFO L125 PetriNetUnfolderBase]: For 43764/43764 co-relation queries the response was YES. [2023-08-04 07:38:32,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034981 conditions, 505637 events. 389704/505637 cut-off events. For 43764/43764 co-relation queries the response was YES. Maximal size of possible extension queue 13299. Compared 3490341 event pairs, 276612 based on Foata normal form. 3/505180 useless extension candidates. Maximal degree in co-relation 363822. Up to 474490 conditions per place. [2023-08-04 07:38:34,504 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 46 selfloop transitions, 3 changer transitions 1/62 dead transitions. [2023-08-04 07:38:34,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 62 transitions, 290 flow [2023-08-04 07:38:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:38:34,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:38:34,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-04 07:38:34,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2023-08-04 07:38:34,506 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-04 07:38:34,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-04 07:38:34,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:38:34,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-04 07:38:34,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:38:34,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:38:34,509 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:38:34,509 INFO L175 Difference]: Start difference. First operand has 76 places, 54 transitions, 174 flow. Second operand 4 states and 608 transitions. [2023-08-04 07:38:34,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 62 transitions, 290 flow [2023-08-04 07:38:34,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 62 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:38:34,727 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 186 flow [2023-08-04 07:38:34,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2023-08-04 07:38:34,728 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 13 predicate places. [2023-08-04 07:38:34,728 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 186 flow [2023-08-04 07:38:34,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:38:34,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:38:34,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:38:34,733 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 07:38:34,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 07:38:34,930 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:38:34,930 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:38:34,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1714809397, now seen corresponding path program 1 times [2023-08-04 07:38:34,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:38:34,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668623545] [2023-08-04 07:38:34,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:38:34,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:38:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:38:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:38:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:38:34,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668623545] [2023-08-04 07:38:34,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668623545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:38:34,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749342363] [2023-08-04 07:38:34,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:38:34,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:38:34,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:38:34,990 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 07:38:34,992 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 07:38:35,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:38:35,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:38:35,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:38:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:38:35,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:38:35,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:38:35,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749342363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:38:35,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:38:35,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:38:35,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329841594] [2023-08-04 07:38:35,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:38:35,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:38:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:38:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:38:35,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:38:35,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 258 [2023-08-04 07:38:35,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:38:35,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:38:35,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 258 [2023-08-04 07:38:35,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:39:01,819 INFO L124 PetriNetUnfolderBase]: 303022/390013 cut-off events. [2023-08-04 07:39:01,820 INFO L125 PetriNetUnfolderBase]: For 30465/30465 co-relation queries the response was YES. [2023-08-04 07:39:03,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795038 conditions, 390013 events. 303022/390013 cut-off events. For 30465/30465 co-relation queries the response was YES. Maximal size of possible extension queue 10971. Compared 2590134 event pairs, 217966 based on Foata normal form. 27/389715 useless extension candidates. Maximal degree in co-relation 279143. Up to 365929 conditions per place. [2023-08-04 07:39:05,858 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 54 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 07:39:05,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 334 flow [2023-08-04 07:39:05,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:39:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:39:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-04 07:39:05,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2023-08-04 07:39:05,861 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-04 07:39:05,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-04 07:39:05,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:39:05,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-04 07:39:05,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:05,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:05,888 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:05,888 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 186 flow. Second operand 4 states and 616 transitions. [2023-08-04 07:39:05,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 334 flow [2023-08-04 07:39:06,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 70 transitions, 327 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:39:06,013 INFO L231 Difference]: Finished difference. Result has 82 places, 54 transitions, 193 flow [2023-08-04 07:39:06,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=82, PETRI_TRANSITIONS=54} [2023-08-04 07:39:06,016 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 15 predicate places. [2023-08-04 07:39:06,016 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 54 transitions, 193 flow [2023-08-04 07:39:06,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:06,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:39:06,017 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:39:06,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 07:39:06,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:39:06,222 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:39:06,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:39:06,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1123480811, now seen corresponding path program 1 times [2023-08-04 07:39:06,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:39:06,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607783603] [2023-08-04 07:39:06,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:39:06,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:39:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:39:06,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:39:06,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:39:06,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607783603] [2023-08-04 07:39:06,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607783603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:39:06,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515912114] [2023-08-04 07:39:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:39:06,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:39:06,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:39:06,293 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 07:39:06,353 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 07:39:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:39:06,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:39:06,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:39:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:39:06,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:39:06,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 07:39:06,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515912114] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:39:06,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:39:06,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:39:06,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634998330] [2023-08-04 07:39:06,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:39:06,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:39:06,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:39:06,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:39:06,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:39:06,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 258 [2023-08-04 07:39:06,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 54 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:06,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:39:06,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 258 [2023-08-04 07:39:06,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:39:30,045 INFO L124 PetriNetUnfolderBase]: 237520/303145 cut-off events. [2023-08-04 07:39:30,045 INFO L125 PetriNetUnfolderBase]: For 22060/22060 co-relation queries the response was YES. [2023-08-04 07:39:31,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618835 conditions, 303145 events. 237520/303145 cut-off events. For 22060/22060 co-relation queries the response was YES. Maximal size of possible extension queue 9391. Compared 1934652 event pairs, 168724 based on Foata normal form. 243/303306 useless extension candidates. Maximal degree in co-relation 217043. Up to 275692 conditions per place. [2023-08-04 07:39:32,037 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 62 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2023-08-04 07:39:32,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 78 transitions, 373 flow [2023-08-04 07:39:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:39:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:39:32,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-08-04 07:39:32,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2023-08-04 07:39:32,039 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-08-04 07:39:32,039 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-08-04 07:39:32,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:39:32,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-08-04 07:39:32,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:32,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:32,043 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:32,043 INFO L175 Difference]: Start difference. First operand has 82 places, 54 transitions, 193 flow. Second operand 4 states and 624 transitions. [2023-08-04 07:39:32,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 78 transitions, 373 flow [2023-08-04 07:39:32,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 366 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:39:32,183 INFO L231 Difference]: Finished difference. Result has 84 places, 54 transitions, 200 flow [2023-08-04 07:39:32,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2023-08-04 07:39:32,184 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 17 predicate places. [2023-08-04 07:39:32,184 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 200 flow [2023-08-04 07:39:32,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:32,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:39:32,185 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] [2023-08-04 07:39:32,404 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 07:39:32,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 07:39:32,597 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:39:32,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:39:32,598 INFO L85 PathProgramCache]: Analyzing trace with hash 388738346, now seen corresponding path program 1 times [2023-08-04 07:39:32,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:39:32,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129805614] [2023-08-04 07:39:32,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:39:32,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:39:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:39:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:39:32,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:39:32,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129805614] [2023-08-04 07:39:32,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129805614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:39:32,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101108472] [2023-08-04 07:39:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:39:32,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:39:32,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:39:32,656 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:39:32,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 07:39:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:39:32,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:39:32,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:39:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:39:32,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:39:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 07:39:32,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101108472] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:39:32,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:39:32,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:39:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050240960] [2023-08-04 07:39:32,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:39:32,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:39:32,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:39:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:39:32,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:39:32,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 258 [2023-08-04 07:39:32,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:32,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:39:32,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 258 [2023-08-04 07:39:32,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:39:54,039 INFO L124 PetriNetUnfolderBase]: 214192/266857 cut-off events. [2023-08-04 07:39:54,039 INFO L125 PetriNetUnfolderBase]: For 21472/21472 co-relation queries the response was YES. [2023-08-04 07:39:54,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554674 conditions, 266857 events. 214192/266857 cut-off events. For 21472/21472 co-relation queries the response was YES. Maximal size of possible extension queue 8104. Compared 1549654 event pairs, 91720 based on Foata normal form. 2187/268962 useless extension candidates. Maximal degree in co-relation 194522. Up to 135913 conditions per place. [2023-08-04 07:39:55,780 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 70 selfloop transitions, 3 changer transitions 1/86 dead transitions. [2023-08-04 07:39:55,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 412 flow [2023-08-04 07:39:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:39:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:39:55,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 07:39:55,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2023-08-04 07:39:55,782 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 07:39:55,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 07:39:55,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:39:55,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 07:39:55,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:55,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:55,787 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 258.0) internal successors, (1290), 5 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:55,787 INFO L175 Difference]: Start difference. First operand has 84 places, 54 transitions, 200 flow. Second operand 4 states and 632 transitions. [2023-08-04 07:39:55,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 412 flow [2023-08-04 07:39:55,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 405 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:39:55,850 INFO L231 Difference]: Finished difference. Result has 86 places, 54 transitions, 207 flow [2023-08-04 07:39:55,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=86, PETRI_TRANSITIONS=54} [2023-08-04 07:39:55,851 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-08-04 07:39:55,851 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 54 transitions, 207 flow [2023-08-04 07:39:55,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:55,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:39:55,851 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:39:55,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 07:39:56,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 07:39:56,056 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:39:56,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:39:56,057 INFO L85 PathProgramCache]: Analyzing trace with hash -364832159, now seen corresponding path program 1 times [2023-08-04 07:39:56,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:39:56,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111945334] [2023-08-04 07:39:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:39:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:39:56,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:39:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 07:39:56,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:39:56,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111945334] [2023-08-04 07:39:56,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111945334] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:39:56,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:39:56,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:39:56,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056840181] [2023-08-04 07:39:56,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:39:56,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:39:56,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:39:56,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:39:56,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:39:56,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 258 [2023-08-04 07:39:56,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 54 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:39:56,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:39:56,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 258 [2023-08-04 07:39:56,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:40:12,609 INFO L124 PetriNetUnfolderBase]: 179192/231257 cut-off events. [2023-08-04 07:40:12,609 INFO L125 PetriNetUnfolderBase]: For 94174/94174 co-relation queries the response was YES. [2023-08-04 07:40:13,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502217 conditions, 231257 events. 179192/231257 cut-off events. For 94174/94174 co-relation queries the response was YES. Maximal size of possible extension queue 7216. Compared 1470190 event pairs, 137132 based on Foata normal form. 1/231238 useless extension candidates. Maximal degree in co-relation 502138. Up to 216065 conditions per place. [2023-08-04 07:40:14,654 INFO L140 encePairwiseOnDemand]: 248/258 looper letters, 64 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2023-08-04 07:40:14,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 85 transitions, 508 flow [2023-08-04 07:40:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:40:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:40:14,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-04 07:40:14,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6007751937984496 [2023-08-04 07:40:14,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-04 07:40:14,656 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-04 07:40:14,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:40:14,656 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-04 07:40:14,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:14,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:14,658 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:14,658 INFO L175 Difference]: Start difference. First operand has 86 places, 54 transitions, 207 flow. Second operand 3 states and 465 transitions. [2023-08-04 07:40:14,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 85 transitions, 508 flow [2023-08-04 07:40:14,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 494 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:40:14,687 INFO L231 Difference]: Finished difference. Result has 86 places, 62 transitions, 261 flow [2023-08-04 07:40:14,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=86, PETRI_TRANSITIONS=62} [2023-08-04 07:40:14,687 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-08-04 07:40:14,687 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 62 transitions, 261 flow [2023-08-04 07:40:14,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:14,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:40:14,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:40:14,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 07:40:14,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:40:14,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:40:14,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1575104625, now seen corresponding path program 1 times [2023-08-04 07:40:14,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:40:14,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860031728] [2023-08-04 07:40:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:40:14,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:40:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:40:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 07:40:14,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:40:14,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860031728] [2023-08-04 07:40:14,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860031728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:40:14,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:40:14,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:40:14,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929344912] [2023-08-04 07:40:14,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:40:14,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:40:14,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:40:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:40:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:40:14,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 258 [2023-08-04 07:40:14,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 62 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:14,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:40:14,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 258 [2023-08-04 07:40:14,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:40:30,618 INFO L124 PetriNetUnfolderBase]: 174826/218014 cut-off events. [2023-08-04 07:40:30,618 INFO L125 PetriNetUnfolderBase]: For 97039/97039 co-relation queries the response was YES. [2023-08-04 07:40:31,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565946 conditions, 218014 events. 174826/218014 cut-off events. For 97039/97039 co-relation queries the response was YES. Maximal size of possible extension queue 6303. Compared 1226379 event pairs, 47515 based on Foata normal form. 728/218741 useless extension candidates. Maximal degree in co-relation 361103. Up to 170587 conditions per place. [2023-08-04 07:40:32,326 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 64 selfloop transitions, 5 changer transitions 0/81 dead transitions. [2023-08-04 07:40:32,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 81 transitions, 470 flow [2023-08-04 07:40:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:40:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:40:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 456 transitions. [2023-08-04 07:40:32,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2023-08-04 07:40:32,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 456 transitions. [2023-08-04 07:40:32,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 456 transitions. [2023-08-04 07:40:32,328 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:40:32,328 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 456 transitions. [2023-08-04 07:40:32,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:32,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:32,331 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:32,331 INFO L175 Difference]: Start difference. First operand has 86 places, 62 transitions, 261 flow. Second operand 3 states and 456 transitions. [2023-08-04 07:40:32,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 81 transitions, 470 flow [2023-08-04 07:40:32,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 461 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:40:32,685 INFO L231 Difference]: Finished difference. Result has 88 places, 64 transitions, 281 flow [2023-08-04 07:40:32,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=281, PETRI_PLACES=88, PETRI_TRANSITIONS=64} [2023-08-04 07:40:32,686 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 21 predicate places. [2023-08-04 07:40:32,686 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 64 transitions, 281 flow [2023-08-04 07:40:32,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:32,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:40:32,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:40:32,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 07:40:32,687 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:40:32,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:40:32,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1684867441, now seen corresponding path program 1 times [2023-08-04 07:40:32,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:40:32,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698633313] [2023-08-04 07:40:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:40:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:40:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:40:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 07:40:32,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:40:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698633313] [2023-08-04 07:40:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698633313] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:40:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234497814] [2023-08-04 07:40:32,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:40:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:40:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:40:32,817 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:40:32,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 07:40:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:40:32,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 07:40:32,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:40:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 07:40:32,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:40:32,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234497814] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:40:32,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:40:32,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-04 07:40:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819935980] [2023-08-04 07:40:32,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:40:32,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:40:32,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:40:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:40:32,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:40:33,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 258 [2023-08-04 07:40:33,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 64 transitions, 281 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:33,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:40:33,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 258 [2023-08-04 07:40:33,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:40:50,647 INFO L124 PetriNetUnfolderBase]: 171242/207817 cut-off events. [2023-08-04 07:40:50,648 INFO L125 PetriNetUnfolderBase]: For 167380/167380 co-relation queries the response was YES. [2023-08-04 07:40:51,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579081 conditions, 207817 events. 171242/207817 cut-off events. For 167380/167380 co-relation queries the response was YES. Maximal size of possible extension queue 5679. Compared 1014202 event pairs, 42202 based on Foata normal form. 256/208071 useless extension candidates. Maximal degree in co-relation 371764. Up to 201280 conditions per place. [2023-08-04 07:40:52,191 INFO L140 encePairwiseOnDemand]: 248/258 looper letters, 83 selfloop transitions, 9 changer transitions 0/104 dead transitions. [2023-08-04 07:40:52,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 104 transitions, 657 flow [2023-08-04 07:40:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:40:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:40:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 481 transitions. [2023-08-04 07:40:52,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214470284237726 [2023-08-04 07:40:52,194 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 481 transitions. [2023-08-04 07:40:52,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 481 transitions. [2023-08-04 07:40:52,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:40:52,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 481 transitions. [2023-08-04 07:40:52,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:52,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:52,197 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:52,197 INFO L175 Difference]: Start difference. First operand has 88 places, 64 transitions, 281 flow. Second operand 3 states and 481 transitions. [2023-08-04 07:40:52,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 104 transitions, 657 flow [2023-08-04 07:40:52,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 104 transitions, 650 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:40:52,248 INFO L231 Difference]: Finished difference. Result has 90 places, 72 transitions, 337 flow [2023-08-04 07:40:52,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=337, PETRI_PLACES=90, PETRI_TRANSITIONS=72} [2023-08-04 07:40:52,249 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 23 predicate places. [2023-08-04 07:40:52,249 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 72 transitions, 337 flow [2023-08-04 07:40:52,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:52,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:40:52,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:40:52,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 07:40:52,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 07:40:52,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:40:52,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:40:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash 810585915, now seen corresponding path program 1 times [2023-08-04 07:40:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:40:52,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459409214] [2023-08-04 07:40:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:40:52,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:40:52,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:40:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 07:40:52,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:40:52,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459409214] [2023-08-04 07:40:52,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459409214] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:40:52,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:40:52,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:40:52,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78289898] [2023-08-04 07:40:52,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:40:52,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:40:52,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:40:52,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:40:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:40:52,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 258 [2023-08-04 07:40:52,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 72 transitions, 337 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:40:52,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:40:52,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 258 [2023-08-04 07:40:52,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:41:08,690 INFO L124 PetriNetUnfolderBase]: 167792/210704 cut-off events. [2023-08-04 07:41:08,690 INFO L125 PetriNetUnfolderBase]: For 189654/189654 co-relation queries the response was YES. [2023-08-04 07:41:09,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 666999 conditions, 210704 events. 167792/210704 cut-off events. For 189654/189654 co-relation queries the response was YES. Maximal size of possible extension queue 5892. Compared 1203999 event pairs, 34107 based on Foata normal form. 600/210500 useless extension candidates. Maximal degree in co-relation 233268. Up to 186389 conditions per place. [2023-08-04 07:41:10,617 INFO L140 encePairwiseOnDemand]: 254/258 looper letters, 88 selfloop transitions, 5 changer transitions 0/105 dead transitions. [2023-08-04 07:41:10,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 105 transitions, 689 flow [2023-08-04 07:41:10,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:41:10,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:41:10,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 488 transitions. [2023-08-04 07:41:10,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6304909560723514 [2023-08-04 07:41:10,619 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 488 transitions. [2023-08-04 07:41:10,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 488 transitions. [2023-08-04 07:41:10,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:41:10,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 488 transitions. [2023-08-04 07:41:10,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:10,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:10,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:10,621 INFO L175 Difference]: Start difference. First operand has 90 places, 72 transitions, 337 flow. Second operand 3 states and 488 transitions. [2023-08-04 07:41:10,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 105 transitions, 689 flow [2023-08-04 07:41:10,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 105 transitions, 674 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:41:10,721 INFO L231 Difference]: Finished difference. Result has 92 places, 74 transitions, 357 flow [2023-08-04 07:41:10,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=357, PETRI_PLACES=92, PETRI_TRANSITIONS=74} [2023-08-04 07:41:10,722 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 25 predicate places. [2023-08-04 07:41:10,722 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 74 transitions, 357 flow [2023-08-04 07:41:10,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:10,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:41:10,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:41:10,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 07:41:10,722 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:41:10,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:41:10,723 INFO L85 PathProgramCache]: Analyzing trace with hash -202166038, now seen corresponding path program 1 times [2023-08-04 07:41:10,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:41:10,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631934087] [2023-08-04 07:41:10,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:41:10,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:41:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:41:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 07:41:10,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:41:10,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631934087] [2023-08-04 07:41:10,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631934087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:41:10,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764990502] [2023-08-04 07:41:10,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:41:10,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:41:10,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:41:10,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:41:10,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 07:41:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:41:10,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-04 07:41:10,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:41:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 07:41:11,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:41:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-04 07:41:11,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764990502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:41:11,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:41:11,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 7 [2023-08-04 07:41:11,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276717962] [2023-08-04 07:41:11,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:41:11,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 07:41:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:41:11,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 07:41:11,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 07:41:11,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 258 [2023-08-04 07:41:11,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 74 transitions, 357 flow. Second operand has 8 states, 8 states have (on average 133.625) internal successors, (1069), 8 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:11,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:41:11,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 258 [2023-08-04 07:41:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:41:22,282 INFO L124 PetriNetUnfolderBase]: 120522/149939 cut-off events. [2023-08-04 07:41:22,282 INFO L125 PetriNetUnfolderBase]: For 182515/182515 co-relation queries the response was YES. [2023-08-04 07:41:23,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496251 conditions, 149939 events. 120522/149939 cut-off events. For 182515/182515 co-relation queries the response was YES. Maximal size of possible extension queue 3861. Compared 760226 event pairs, 2328 based on Foata normal form. 4679/154462 useless extension candidates. Maximal degree in co-relation 328155. Up to 65452 conditions per place. [2023-08-04 07:41:23,698 INFO L140 encePairwiseOnDemand]: 245/258 looper letters, 291 selfloop transitions, 69 changer transitions 0/372 dead transitions. [2023-08-04 07:41:23,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 372 transitions, 2666 flow [2023-08-04 07:41:23,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-04 07:41:23,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-04 07:41:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1655 transitions. [2023-08-04 07:41:23,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5831571529245948 [2023-08-04 07:41:23,702 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1655 transitions. [2023-08-04 07:41:23,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1655 transitions. [2023-08-04 07:41:23,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:41:23,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1655 transitions. [2023-08-04 07:41:23,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 150.45454545454547) internal successors, (1655), 11 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:23,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:23,710 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 258.0) internal successors, (3096), 12 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:23,710 INFO L175 Difference]: Start difference. First operand has 92 places, 74 transitions, 357 flow. Second operand 11 states and 1655 transitions. [2023-08-04 07:41:23,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 372 transitions, 2666 flow [2023-08-04 07:41:23,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 372 transitions, 2643 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:41:23,749 INFO L231 Difference]: Finished difference. Result has 109 places, 138 transitions, 923 flow [2023-08-04 07:41:23,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=258, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=923, PETRI_PLACES=109, PETRI_TRANSITIONS=138} [2023-08-04 07:41:23,750 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 42 predicate places. [2023-08-04 07:41:23,750 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 138 transitions, 923 flow [2023-08-04 07:41:23,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 133.625) internal successors, (1069), 8 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:23,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:41:23,751 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:41:23,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 07:41:23,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:41:23,951 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:41:23,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:41:23,952 INFO L85 PathProgramCache]: Analyzing trace with hash -914501125, now seen corresponding path program 1 times [2023-08-04 07:41:23,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:41:23,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753060609] [2023-08-04 07:41:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:41:23,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:41:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:41:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 07:41:24,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:41:24,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753060609] [2023-08-04 07:41:24,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753060609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:41:24,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167804134] [2023-08-04 07:41:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:41:24,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:41:24,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:41:24,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:41:24,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 07:41:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:41:24,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-04 07:41:24,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:41:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:41:24,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:41:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 07:41:24,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167804134] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:41:24,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:41:24,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 7, 7] total 16 [2023-08-04 07:41:24,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917702468] [2023-08-04 07:41:24,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:41:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-04 07:41:24,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:41:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-04 07:41:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2023-08-04 07:41:24,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 258 [2023-08-04 07:41:24,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 138 transitions, 923 flow. Second operand has 18 states, 18 states have (on average 129.5) internal successors, (2331), 18 states have internal predecessors, (2331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:41:24,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:41:24,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 258 [2023-08-04 07:41:24,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-04 07:43:35,421 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:43:35,424 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 07:43:36,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 07:43:36,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown