/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_rfi009_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:23:25,375 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:23:25,451 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:23:25,456 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:23:25,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:23:25,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:23:25,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:23:25,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:23:25,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:23:25,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:23:25,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:23:25,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:23:25,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:23:25,492 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:23:25,492 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:23:25,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:23:25,493 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:23:25,493 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:23:25,493 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:23:25,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:23:25,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:23:25,494 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:23:25,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:23:25,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:23:25,495 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:23:25,496 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:23:25,496 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:23:25,497 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:23:25,497 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:23:25,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:23:25,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:23:25,498 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:23:25,498 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:23:25,499 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:23:25,499 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:23:25,499 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:23:25,499 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:23:25,499 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:23:25,499 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:23:25,499 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:23:25,500 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:23:25,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:23:25,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:23:25,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:23:25,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:23:25,740 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:23:25,742 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:23:25,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_power.oepc_bound2.i [2023-08-04 06:23:27,055 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:23:27,329 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:23:27,333 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi009_power.oepc_bound2.i [2023-08-04 06:23:27,346 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af969f0e/e0aa300c43954d1d958c5fa1137bae1b/FLAGefdf28a9f [2023-08-04 06:23:27,358 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6af969f0e/e0aa300c43954d1d958c5fa1137bae1b [2023-08-04 06:23:27,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:23:27,362 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:23:27,363 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:23:27,363 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:23:27,367 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:23:27,367 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,368 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5599c8be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27, skipping insertion in model container [2023-08-04 06:23:27,368 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,411 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:23:27,544 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_rfi009_power.oepc_bound2.i[994,1007] [2023-08-04 06:23:27,736 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:23:27,745 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:23:27,756 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_rfi009_power.oepc_bound2.i[994,1007] [2023-08-04 06:23:27,781 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:23:27,783 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:23:27,816 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:23:27,838 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:23:27,839 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:23:27,844 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:23:27,845 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27 WrapperNode [2023-08-04 06:23:27,845 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:23:27,846 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:23:27,846 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:23:27,846 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:23:27,852 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,889 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 162 [2023-08-04 06:23:27,890 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:23:27,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:23:27,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:23:27,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:23:27,903 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,933 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,952 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:23:27,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:23:27,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:23:27,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:23:27,956 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (1/1) ... [2023-08-04 06:23:27,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:23:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:23:27,992 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 06:23:27,995 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 06:23:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 06:23:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:23:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:23:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:23:28,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:23:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:23:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:23:28,025 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:23:28,025 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:23:28,026 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:23:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:23:28,026 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:23:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:23:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:23:28,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:23:28,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:23:28,028 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 06:23:28,221 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:23:28,224 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:23:28,729 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:23:28,975 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:23:28,976 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:23:28,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:23:28 BoogieIcfgContainer [2023-08-04 06:23:28,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:23:28,983 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:23:28,983 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:23:28,987 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:23:28,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:23:27" (1/3) ... [2023-08-04 06:23:28,988 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a746d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:23:28, skipping insertion in model container [2023-08-04 06:23:28,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:23:27" (2/3) ... [2023-08-04 06:23:28,989 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a746d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:23:28, skipping insertion in model container [2023-08-04 06:23:28,989 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:23:28" (3/3) ... [2023-08-04 06:23:28,990 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_rfi009_power.oepc_bound2.i [2023-08-04 06:23:28,997 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:23:29,005 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:23:29,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 06:23:29,006 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:23:29,075 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:23:29,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 06:23:29,223 INFO L124 PetriNetUnfolderBase]: 30/462 cut-off events. [2023-08-04 06:23:29,223 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:23:29,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 462 events. 30/462 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1926 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 287. Up to 16 conditions per place. [2023-08-04 06:23:29,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 06:23:29,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 131 transitions, 271 flow [2023-08-04 06:23:29,239 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:23:29,247 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 131 transitions, 271 flow [2023-08-04 06:23:29,249 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 131 transitions, 271 flow [2023-08-04 06:23:29,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 271 flow [2023-08-04 06:23:29,299 INFO L124 PetriNetUnfolderBase]: 22/359 cut-off events. [2023-08-04 06:23:29,299 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:23:29,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 359 events. 22/359 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1315 event pairs, 0 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 233. Up to 16 conditions per place. [2023-08-04 06:23:29,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 1760 [2023-08-04 06:23:35,665 INFO L134 LiptonReduction]: Checked pairs total: 4517 [2023-08-04 06:23:35,665 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-04 06:23:35,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:23:35,682 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;@2c1e2c9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:23:35,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:23:35,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:23:35,690 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2023-08-04 06:23:35,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:23:35,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:35,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:23:35,692 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:23:35,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash 797595953, now seen corresponding path program 1 times [2023-08-04 06:23:35,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:35,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522902560] [2023-08-04 06:23:35,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:35,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:36,024 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 06:23:36,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:23:36,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522902560] [2023-08-04 06:23:36,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522902560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:23:36,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:23:36,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:23:36,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310293657] [2023-08-04 06:23:36,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:23:36,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:23:36,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:23:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:23:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:23:36,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 257 [2023-08-04 06:23:36,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:36,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:23:36,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 257 [2023-08-04 06:23:36,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:23:36,514 INFO L124 PetriNetUnfolderBase]: 1106/1772 cut-off events. [2023-08-04 06:23:36,514 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-04 06:23:36,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3559 conditions, 1772 events. 1106/1772 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9036 event pairs, 894 based on Foata normal form. 75/1670 useless extension candidates. Maximal degree in co-relation 3546. Up to 1740 conditions per place. [2023-08-04 06:23:36,527 INFO L140 encePairwiseOnDemand]: 253/257 looper letters, 24 selfloop transitions, 2 changer transitions 2/30 dead transitions. [2023-08-04 06:23:36,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 125 flow [2023-08-04 06:23:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:23:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:23:36,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-04 06:23:36,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369649805447471 [2023-08-04 06:23:36,542 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-04 06:23:36,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-04 06:23:36,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:23:36,546 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-04 06:23:36,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:36,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:36,554 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:36,556 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 65 flow. Second operand 3 states and 414 transitions. [2023-08-04 06:23:36,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 125 flow [2023-08-04 06:23:36,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:23:36,560 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 69 flow [2023-08-04 06:23:36,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 06:23:36,566 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 06:23:36,566 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 69 flow [2023-08-04 06:23:36,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:36,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:36,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:23:36,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:23:36,568 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:23:36,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:36,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1967665278, now seen corresponding path program 1 times [2023-08-04 06:23:36,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:36,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036008157] [2023-08-04 06:23:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:36,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:36,677 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 06:23:36,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:23:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036008157] [2023-08-04 06:23:36,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036008157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:23:36,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348918952] [2023-08-04 06:23:36,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:36,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:23:36,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:23:36,681 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 06:23:36,683 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 06:23:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:36,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:23:36,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:23:36,830 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 06:23:36,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:23:36,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348918952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:23:36,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:23:36,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:23:36,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853524847] [2023-08-04 06:23:36,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:23:36,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:23:36,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:23:36,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:23:36,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:23:36,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 257 [2023-08-04 06:23:36,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:36,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:23:36,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 257 [2023-08-04 06:23:36,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:23:37,228 INFO L124 PetriNetUnfolderBase]: 844/1311 cut-off events. [2023-08-04 06:23:37,229 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-04 06:23:37,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2665 conditions, 1311 events. 844/1311 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6042 event pairs, 718 based on Foata normal form. 0/1239 useless extension candidates. Maximal degree in co-relation 2649. Up to 1276 conditions per place. [2023-08-04 06:23:37,239 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 27 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 06:23:37,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 141 flow [2023-08-04 06:23:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:23:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:23:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-04 06:23:37,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5382619974059663 [2023-08-04 06:23:37,251 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-04 06:23:37,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-04 06:23:37,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:23:37,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-04 06:23:37,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:37,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:37,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:37,256 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 69 flow. Second operand 3 states and 415 transitions. [2023-08-04 06:23:37,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 141 flow [2023-08-04 06:23:37,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:23:37,258 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 73 flow [2023-08-04 06:23:37,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 06:23:37,259 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 06:23:37,259 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 73 flow [2023-08-04 06:23:37,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:37,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:37,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:23:37,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 06:23:37,465 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 06:23:37,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:23:37,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:37,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1600537679, now seen corresponding path program 1 times [2023-08-04 06:23:37,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:37,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312731275] [2023-08-04 06:23:37,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:37,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:37,547 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 06:23:37,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:23:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312731275] [2023-08-04 06:23:37,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312731275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:23:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268106276] [2023-08-04 06:23:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:37,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:23:37,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:23:37,550 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 06:23:37,553 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 06:23:37,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:37,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:23:37,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:23:37,687 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 06:23:37,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:23:37,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268106276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:23:37,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:23:37,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:23:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001637424] [2023-08-04 06:23:37,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:23:37,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:23:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:23:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:23:37,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:23:37,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 257 [2023-08-04 06:23:37,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:37,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:23:37,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 257 [2023-08-04 06:23:37,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:23:37,983 INFO L124 PetriNetUnfolderBase]: 776/1201 cut-off events. [2023-08-04 06:23:37,984 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-04 06:23:37,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1201 events. 776/1201 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5345 event pairs, 458 based on Foata normal form. 0/1152 useless extension candidates. Maximal degree in co-relation 2459. Up to 1016 conditions per place. [2023-08-04 06:23:37,991 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 30 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 06:23:37,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 157 flow [2023-08-04 06:23:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:23:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:23:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 418 transitions. [2023-08-04 06:23:37,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5421530479896238 [2023-08-04 06:23:37,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 418 transitions. [2023-08-04 06:23:37,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 418 transitions. [2023-08-04 06:23:37,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:23:37,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 418 transitions. [2023-08-04 06:23:37,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:37,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:37,996 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:37,996 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 73 flow. Second operand 3 states and 418 transitions. [2023-08-04 06:23:37,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 157 flow [2023-08-04 06:23:37,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 153 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:23:37,998 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 77 flow [2023-08-04 06:23:37,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-04 06:23:38,000 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-04 06:23:38,000 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 77 flow [2023-08-04 06:23:38,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:38,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:38,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:23:38,006 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 06:23:38,206 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 06:23:38,206 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:23:38,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:38,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1307729134, now seen corresponding path program 1 times [2023-08-04 06:23:38,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:38,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720955152] [2023-08-04 06:23:38,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:38,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:38,275 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 06:23:38,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:23:38,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720955152] [2023-08-04 06:23:38,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720955152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:23:38,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628994196] [2023-08-04 06:23:38,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:38,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:23:38,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:23:38,281 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 06:23:38,304 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 06:23:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:38,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:23:38,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:23:38,435 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 06:23:38,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:23:38,456 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 06:23:38,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628994196] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:23:38,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:23:38,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:23:38,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091289220] [2023-08-04 06:23:38,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:23:38,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:23:38,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:23:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:23:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:23:38,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 257 [2023-08-04 06:23:38,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:38,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:23:38,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 257 [2023-08-04 06:23:38,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:23:38,501 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:23:38,502 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:23:38,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. 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 06:23:38,503 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:23:38,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 06:23:38,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:23:38,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:23:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-04 06:23:38,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038910505836576 [2023-08-04 06:23:38,505 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-04 06:23:38,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-04 06:23:38,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:23:38,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-04 06:23:38,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:38,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:38,510 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:38,510 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 77 flow. Second operand 4 states and 518 transitions. [2023-08-04 06:23:38,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 06:23:38,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:23:38,511 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 06:23:38,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 06:23:38,512 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -16 predicate places. [2023-08-04 06:23:38,512 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 06:23:38,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:38,515 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 06:23:38,523 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 06:23:38,720 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 06:23:38,721 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 06:23:38,723 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 06:23:38,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 06:23:38,775 INFO L124 PetriNetUnfolderBase]: 30/462 cut-off events. [2023-08-04 06:23:38,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:23:38,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 487 conditions, 462 events. 30/462 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1926 event pairs, 0 based on Foata normal form. 0/410 useless extension candidates. Maximal degree in co-relation 287. Up to 16 conditions per place. [2023-08-04 06:23:38,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-04 06:23:38,778 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-04 06:23:38,778 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:23:38,778 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 06:23:38,779 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-04 06:23:38,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-04 06:23:38,799 INFO L124 PetriNetUnfolderBase]: 6/230 cut-off events. [2023-08-04 06:23:38,799 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:23:38,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 230 events. 6/230 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 600 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-08-04 06:23:38,801 INFO L119 LiptonReduction]: Number of co-enabled transitions 1190 [2023-08-04 06:23:44,143 INFO L134 LiptonReduction]: Checked pairs total: 2855 [2023-08-04 06:23:44,143 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-04 06:23:44,149 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:23:44,151 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;@2c1e2c9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:23:44,151 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:23:44,156 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:23:44,157 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 06:23:44,157 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:23:44,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:44,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:23:44,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:23:44,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:44,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1894463692, now seen corresponding path program 1 times [2023-08-04 06:23:44,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:44,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610783518] [2023-08-04 06:23:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:44,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:44,199 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 06:23:44,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:23:44,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610783518] [2023-08-04 06:23:44,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610783518] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:23:44,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:23:44,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:23:44,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609632849] [2023-08-04 06:23:44,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:23:44,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:23:44,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:23:44,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:23:44,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:23:44,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 245 [2023-08-04 06:23:44,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:44,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:23:44,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 245 [2023-08-04 06:23:44,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:23:44,371 INFO L124 PetriNetUnfolderBase]: 266/472 cut-off events. [2023-08-04 06:23:44,372 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-04 06:23:44,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 472 events. 266/472 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1926 event pairs, 204 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 969. Up to 450 conditions per place. [2023-08-04 06:23:44,375 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 20 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-04 06:23:44,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 111 flow [2023-08-04 06:23:44,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:23:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:23:44,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-08-04 06:23:44,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5537414965986395 [2023-08-04 06:23:44,377 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-08-04 06:23:44,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-08-04 06:23:44,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:23:44,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-08-04 06:23:44,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:44,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:44,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:44,380 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 61 flow. Second operand 3 states and 407 transitions. [2023-08-04 06:23:44,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 111 flow [2023-08-04 06:23:44,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 111 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:23:44,382 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 69 flow [2023-08-04 06:23:44,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-04 06:23:44,385 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-04 06:23:44,385 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 69 flow [2023-08-04 06:23:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:44,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:44,386 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:23:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 06:23:44,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:23:44,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1902019630, now seen corresponding path program 1 times [2023-08-04 06:23:44,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210522089] [2023-08-04 06:23:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:44,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:44,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:23:44,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:23:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:23:44,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:23:44,446 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:23:44,447 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:23:44,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:23:44,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:23:44,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:23:44,448 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 06:23:44,448 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:23:44,449 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:23:44,449 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:23:44,490 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:23:44,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 06:23:44,635 INFO L124 PetriNetUnfolderBase]: 93/1375 cut-off events. [2023-08-04 06:23:44,635 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:23:44,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 1375 events. 93/1375 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9293 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1007. Up to 54 conditions per place. [2023-08-04 06:23:44,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 06:23:44,645 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 153 transitions, 330 flow [2023-08-04 06:23:44,645 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:23:44,645 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 06:23:44,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 06:23:44,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 153 transitions, 330 flow [2023-08-04 06:23:44,745 INFO L124 PetriNetUnfolderBase]: 66/1038 cut-off events. [2023-08-04 06:23:44,746 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 06:23:44,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1110 conditions, 1038 events. 66/1038 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6338 event pairs, 0 based on Foata normal form. 0/933 useless extension candidates. Maximal degree in co-relation 779. Up to 54 conditions per place. [2023-08-04 06:23:44,766 INFO L119 LiptonReduction]: Number of co-enabled transitions 4356 [2023-08-04 06:23:52,216 INFO L134 LiptonReduction]: Checked pairs total: 14338 [2023-08-04 06:23:52,216 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-04 06:23:52,218 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:23:52,219 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;@2c1e2c9d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:23:52,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:23:52,223 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:23:52,224 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-04 06:23:52,224 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 06:23:52,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:52,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:23:52,224 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:23:52,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -497627795, now seen corresponding path program 1 times [2023-08-04 06:23:52,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:52,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681987474] [2023-08-04 06:23:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:52,256 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 06:23:52,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:23:52,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681987474] [2023-08-04 06:23:52,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681987474] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:23:52,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:23:52,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:23:52,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546012750] [2023-08-04 06:23:52,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:23:52,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:23:52,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:23:52,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:23:52,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:23:52,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-04 06:23:52,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:52,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:23:52,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-04 06:23:52,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:24:23,547 INFO L124 PetriNetUnfolderBase]: 155552/201513 cut-off events. [2023-08-04 06:24:23,548 INFO L125 PetriNetUnfolderBase]: For 3201/3201 co-relation queries the response was YES. [2023-08-04 06:24:24,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403646 conditions, 201513 events. 155552/201513 cut-off events. For 3201/3201 co-relation queries the response was YES. Maximal size of possible extension queue 5436. Compared 1265909 event pairs, 126978 based on Foata normal form. 5292/195615 useless extension candidates. Maximal degree in co-relation 115493. Up to 198414 conditions per place. [2023-08-04 06:24:24,782 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 37 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-04 06:24:24,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 198 flow [2023-08-04 06:24:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:24:24,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:24:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 06:24:24,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543859649122806 [2023-08-04 06:24:24,784 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 06:24:24,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 06:24:24,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:24:24,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 06:24:24,786 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 06:24:24,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:24,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:24,788 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 112 flow. Second operand 3 states and 474 transitions. [2023-08-04 06:24:24,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 198 flow [2023-08-04 06:24:24,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:24:24,792 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 120 flow [2023-08-04 06:24:24,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-04 06:24:24,793 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 06:24:24,793 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 120 flow [2023-08-04 06:24:24,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:24,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:24:24,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:24:24,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 06:24:24,794 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:24:24,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:24:24,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1396838491, now seen corresponding path program 1 times [2023-08-04 06:24:24,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:24:24,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498286972] [2023-08-04 06:24:24,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:24,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:24:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:24,886 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 06:24:24,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:24:24,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498286972] [2023-08-04 06:24:24,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498286972] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:24:24,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466316537] [2023-08-04 06:24:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:24,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:24,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:24:24,893 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 06:24:24,896 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 06:24:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:25,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:24:25,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:24:25,021 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 06:24:25,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:24:25,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466316537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:24:25,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:24:25,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:24:25,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314525138] [2023-08-04 06:24:25,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:24:25,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:24:25,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:24:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:24:25,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:24:25,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-04 06:24:25,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:25,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:24:25,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-04 06:24:25,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:24:49,778 INFO L124 PetriNetUnfolderBase]: 131638/169000 cut-off events. [2023-08-04 06:24:49,779 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2023-08-04 06:24:50,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340037 conditions, 169000 events. 131638/169000 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 4567. Compared 1029015 event pairs, 104770 based on Foata normal form. 0/163420 useless extension candidates. Maximal degree in co-relation 340000. Up to 167305 conditions per place. [2023-08-04 06:24:50,879 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 43 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 06:24:50,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 228 flow [2023-08-04 06:24:50,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:24:50,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:24:50,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-04 06:24:50,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578947368421052 [2023-08-04 06:24:50,882 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-04 06:24:50,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-04 06:24:50,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:24:50,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-04 06:24:50,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:50,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:50,888 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:50,888 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 120 flow. Second operand 3 states and 477 transitions. [2023-08-04 06:24:50,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 228 flow [2023-08-04 06:24:50,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:24:50,892 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 130 flow [2023-08-04 06:24:50,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-04 06:24:50,894 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 06:24:50,894 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 130 flow [2023-08-04 06:24:50,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:50,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:24:50,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:24:50,900 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 06:24:51,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:51,100 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:24:51,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:24:51,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1882322526, now seen corresponding path program 1 times [2023-08-04 06:24:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:24:51,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589710386] [2023-08-04 06:24:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:24:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:51,189 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 06:24:51,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:24:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589710386] [2023-08-04 06:24:51,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589710386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:24:51,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474693879] [2023-08-04 06:24:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:51,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:51,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:24:51,191 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 06:24:51,193 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 06:24:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:51,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:24:51,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:24:51,345 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 06:24:51,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:24:51,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474693879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:24:51,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:24:51,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:24:51,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848750195] [2023-08-04 06:24:51,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:24:51,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:24:51,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:24:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:24:51,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:24:51,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-04 06:24:51,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:51,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:24:51,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-04 06:24:51,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:15,549 INFO L124 PetriNetUnfolderBase]: 129222/165726 cut-off events. [2023-08-04 06:25:15,549 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2023-08-04 06:25:16,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333925 conditions, 165726 events. 129222/165726 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 4602. Compared 989199 event pairs, 101118 based on Foata normal form. 0/160671 useless extension candidates. Maximal degree in co-relation 95808. Up to 159021 conditions per place. [2023-08-04 06:25:16,558 INFO L140 encePairwiseOnDemand]: 282/285 looper letters, 50 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 06:25:16,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 264 flow [2023-08-04 06:25:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:25:16,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:25:16,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 483 transitions. [2023-08-04 06:25:16,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5649122807017544 [2023-08-04 06:25:16,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 483 transitions. [2023-08-04 06:25:16,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 483 transitions. [2023-08-04 06:25:16,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:16,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 483 transitions. [2023-08-04 06:25:16,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.0) internal successors, (483), 3 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:16,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:16,563 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:16,563 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 130 flow. Second operand 3 states and 483 transitions. [2023-08-04 06:25:16,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 264 flow [2023-08-04 06:25:16,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:25:16,567 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 140 flow [2023-08-04 06:25:16,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-08-04 06:25:16,567 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 06:25:16,568 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 140 flow [2023-08-04 06:25:16,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:16,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:16,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:25:16,576 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 06:25:16,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:16,777 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:16,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:16,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1800391766, now seen corresponding path program 1 times [2023-08-04 06:25:16,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:16,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800809168] [2023-08-04 06:25:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:16,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:16,850 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 06:25:16,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800809168] [2023-08-04 06:25:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800809168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:25:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527931316] [2023-08-04 06:25:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:16,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:16,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:25:16,853 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 06:25:16,855 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 06:25:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:16,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:25:16,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:25:17,000 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 06:25:17,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:25:17,015 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 06:25:17,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527931316] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:25:17,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:25:17,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:25:17,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499673488] [2023-08-04 06:25:17,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:25:17,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:25:17,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:17,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:25:17,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:25:17,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 06:25:17,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:17,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:17,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 06:25:17,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:36,951 INFO L124 PetriNetUnfolderBase]: 101278/128552 cut-off events. [2023-08-04 06:25:36,952 INFO L125 PetriNetUnfolderBase]: For 9501/9501 co-relation queries the response was YES. [2023-08-04 06:25:37,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267146 conditions, 128552 events. 101278/128552 cut-off events. For 9501/9501 co-relation queries the response was YES. Maximal size of possible extension queue 3717. Compared 730770 event pairs, 66426 based on Foata normal form. 3/128366 useless extension candidates. Maximal degree in co-relation 94838. Up to 127384 conditions per place. [2023-08-04 06:25:37,912 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 42 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 06:25:37,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 248 flow [2023-08-04 06:25:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:25:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:25:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-08-04 06:25:37,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5412280701754386 [2023-08-04 06:25:37,915 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-08-04 06:25:37,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-08-04 06:25:37,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:37,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-08-04 06:25:37,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:37,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:37,919 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:37,919 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 140 flow. Second operand 4 states and 617 transitions. [2023-08-04 06:25:37,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 248 flow [2023-08-04 06:25:37,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:25:37,926 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 152 flow [2023-08-04 06:25:37,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 06:25:37,926 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 06:25:37,926 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 152 flow [2023-08-04 06:25:37,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.0) internal successors, (735), 5 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:37,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:37,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:25:37,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 06:25:38,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:38,133 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:38,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1444808635, now seen corresponding path program 1 times [2023-08-04 06:25:38,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:38,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163326395] [2023-08-04 06:25:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 06:25:38,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163326395] [2023-08-04 06:25:38,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163326395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:25:38,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931967358] [2023-08-04 06:25:38,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:38,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:38,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:25:38,191 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 06:25:38,194 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 06:25:38,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:38,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:25:38,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:25:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 06:25:38,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:25:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 06:25:38,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931967358] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:25:38,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:25:38,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:25:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428116729] [2023-08-04 06:25:38,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:25:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:25:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:25:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:25:38,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 06:25:38,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:38,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:38,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 06:25:38,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:54,419 INFO L124 PetriNetUnfolderBase]: 84352/106246 cut-off events. [2023-08-04 06:25:54,419 INFO L125 PetriNetUnfolderBase]: For 6813/6813 co-relation queries the response was YES. [2023-08-04 06:25:54,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220094 conditions, 106246 events. 84352/106246 cut-off events. For 6813/6813 co-relation queries the response was YES. Maximal size of possible extension queue 3428. Compared 592206 event pairs, 52642 based on Foata normal form. 36/106129 useless extension candidates. Maximal degree in co-relation 78012. Up to 104044 conditions per place. [2023-08-04 06:25:55,065 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 53 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2023-08-04 06:25:55,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 304 flow [2023-08-04 06:25:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:25:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:25:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 628 transitions. [2023-08-04 06:25:55,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5508771929824562 [2023-08-04 06:25:55,068 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 628 transitions. [2023-08-04 06:25:55,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 628 transitions. [2023-08-04 06:25:55,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:55,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 628 transitions. [2023-08-04 06:25:55,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,071 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,071 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 152 flow. Second operand 4 states and 628 transitions. [2023-08-04 06:25:55,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 304 flow [2023-08-04 06:25:55,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 297 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:25:55,078 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 159 flow [2023-08-04 06:25:55,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-04 06:25:55,078 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 06:25:55,078 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 159 flow [2023-08-04 06:25:55,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:55,079 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] [2023-08-04 06:25:55,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 06:25:55,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:55,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:55,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:55,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2049261863, now seen corresponding path program 1 times [2023-08-04 06:25:55,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:55,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674929213] [2023-08-04 06:25:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:55,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:55,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 06:25:55,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674929213] [2023-08-04 06:25:55,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674929213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:25:55,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560406878] [2023-08-04 06:25:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:55,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:25:55,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:25:55,352 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 06:25:55,354 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 06:25:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:55,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:25:55,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:25:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 06:25:55,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:25:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 06:25:55,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560406878] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:25:55,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:25:55,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:25:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113246313] [2023-08-04 06:25:55,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:25:55,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:25:55,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:55,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:25:55,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:25:55,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 285 [2023-08-04 06:25:55,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:55,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:55,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 285 [2023-08-04 06:25:55,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:26:09,721 INFO L124 PetriNetUnfolderBase]: 75688/95143 cut-off events. [2023-08-04 06:26:09,721 INFO L125 PetriNetUnfolderBase]: For 6040/6040 co-relation queries the response was YES. [2023-08-04 06:26:10,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197815 conditions, 95143 events. 75688/95143 cut-off events. For 6040/6040 co-relation queries the response was YES. Maximal size of possible extension queue 3191. Compared 509705 event pairs, 35320 based on Foata normal form. 576/95566 useless extension candidates. Maximal degree in co-relation 70042. Up to 62836 conditions per place. [2023-08-04 06:26:10,493 INFO L140 encePairwiseOnDemand]: 281/285 looper letters, 65 selfloop transitions, 3 changer transitions 1/76 dead transitions. [2023-08-04 06:26:10,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 359 flow [2023-08-04 06:26:10,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:26:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:26:10,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 640 transitions. [2023-08-04 06:26:10,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-08-04 06:26:10,496 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 640 transitions. [2023-08-04 06:26:10,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 640 transitions. [2023-08-04 06:26:10,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:26:10,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 640 transitions. [2023-08-04 06:26:10,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 160.0) internal successors, (640), 4 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:10,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:10,499 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 285.0) internal successors, (1425), 5 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:10,500 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 159 flow. Second operand 4 states and 640 transitions. [2023-08-04 06:26:10,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 359 flow [2023-08-04 06:26:10,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 352 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:26:10,504 INFO L231 Difference]: Finished difference. Result has 70 places, 45 transitions, 166 flow [2023-08-04 06:26:10,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=70, PETRI_TRANSITIONS=45} [2023-08-04 06:26:10,504 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 06:26:10,505 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 45 transitions, 166 flow [2023-08-04 06:26:10,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.4) internal successors, (737), 5 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:10,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:26:10,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:26:10,513 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 06:26:10,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 06:26:10,711 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:26:10,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:26:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1769683488, now seen corresponding path program 1 times [2023-08-04 06:26:10,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:26:10,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853474505] [2023-08-04 06:26:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:26:10,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:26:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:26:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:26:11,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:26:11,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853474505] [2023-08-04 06:26:11,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853474505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:26:11,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:26:11,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:26:11,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647621617] [2023-08-04 06:26:11,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:26:11,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:26:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:26:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:26:11,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:26:11,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 285 [2023-08-04 06:26:11,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 45 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:11,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:26:11,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 285 [2023-08-04 06:26:11,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:26:24,744 INFO L124 PetriNetUnfolderBase]: 71080/90967 cut-off events. [2023-08-04 06:26:24,744 INFO L125 PetriNetUnfolderBase]: For 26078/26078 co-relation queries the response was YES. [2023-08-04 06:26:25,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196718 conditions, 90967 events. 71080/90967 cut-off events. For 26078/26078 co-relation queries the response was YES. Maximal size of possible extension queue 3019. Compared 512493 event pairs, 50178 based on Foata normal form. 2304/93247 useless extension candidates. Maximal degree in co-relation 196642. Up to 74261 conditions per place. [2023-08-04 06:26:25,370 INFO L140 encePairwiseOnDemand]: 280/285 looper letters, 67 selfloop transitions, 3 changer transitions 31/108 dead transitions. [2023-08-04 06:26:25,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 564 flow [2023-08-04 06:26:25,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 06:26:25,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 06:26:25,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 832 transitions. [2023-08-04 06:26:25,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.583859649122807 [2023-08-04 06:26:25,372 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 832 transitions. [2023-08-04 06:26:25,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 832 transitions. [2023-08-04 06:26:25,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:26:25,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 832 transitions. [2023-08-04 06:26:25,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.4) internal successors, (832), 5 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:25,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:25,377 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 285.0) internal successors, (1710), 6 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:25,377 INFO L175 Difference]: Start difference. First operand has 70 places, 45 transitions, 166 flow. Second operand 5 states and 832 transitions. [2023-08-04 06:26:25,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 564 flow [2023-08-04 06:26:25,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 550 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 06:26:25,420 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 186 flow [2023-08-04 06:26:25,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2023-08-04 06:26:25,420 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-08-04 06:26:25,421 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 186 flow [2023-08-04 06:26:25,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:25,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:26:25,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:26:25,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 06:26:25,421 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:26:25,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:26:25,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1491430647, now seen corresponding path program 1 times [2023-08-04 06:26:25,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:26:25,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145822865] [2023-08-04 06:26:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:26:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:26:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:26:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 06:26:25,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:26:25,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145822865] [2023-08-04 06:26:25,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145822865] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:26:25,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:26:25,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 06:26:25,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837570281] [2023-08-04 06:26:25,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:26:25,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:26:25,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:26:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:26:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:26:25,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 285 [2023-08-04 06:26:25,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 148.0) internal successors, (740), 5 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:26:25,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:26:25,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 285 [2023-08-04 06:26:25,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand