/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_mix053.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:16:55,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:16:55,349 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:16:55,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:16:55,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:16:55,357 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:16:55,358 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:16:55,385 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:16:55,385 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:16:55,386 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:16:55,386 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:16:55,387 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:16:55,387 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:16:55,387 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:16:55,388 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:16:55,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:16:55,392 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:16:55,395 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:16:55,395 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:16:55,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:16:55,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:16:55,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:16:55,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:16:55,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:16:55,398 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:16:55,398 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:16:55,398 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:16:55,399 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:16:55,399 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:16:55,399 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:16:55,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:16:55,400 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:16:55,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:16:55,401 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:16:55,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:16:55,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:16:55,401 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:16:55,401 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:16:55,401 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:16:55,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:16:55,402 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:16:55,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:16:55,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:16:55,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:16:55,600 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:16:55,600 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:16:55,601 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:16:55,602 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix053.opt_bound2.i [2023-08-04 06:16:56,783 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:16:56,982 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:16:56,983 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix053.opt_bound2.i [2023-08-04 06:16:57,000 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96cb7a2f6/bef559a938da4727b4e3fad2b1585f09/FLAG167c81c82 [2023-08-04 06:16:57,015 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/96cb7a2f6/bef559a938da4727b4e3fad2b1585f09 [2023-08-04 06:16:57,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:16:57,019 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:16:57,020 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:16:57,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:16:57,024 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:16:57,024 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,025 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ca40603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57, skipping insertion in model container [2023-08-04 06:16:57,025 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,074 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:16:57,166 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_mix053.opt_bound2.i[944,957] [2023-08-04 06:16:57,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:16:57,333 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:16:57,344 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_mix053.opt_bound2.i[944,957] [2023-08-04 06:16:57,362 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:16:57,363 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:16:57,407 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:16:57,438 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:16:57,438 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:16:57,444 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:16:57,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57 WrapperNode [2023-08-04 06:16:57,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:16:57,448 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:16:57,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:16:57,448 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:16:57,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,501 INFO L138 Inliner]: procedures = 177, calls = 67, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 175 [2023-08-04 06:16:57,501 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:16:57,502 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:16:57,502 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:16:57,502 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:16:57,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,543 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,548 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:16:57,549 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:16:57,549 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:16:57,549 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:16:57,550 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (1/1) ... [2023-08-04 06:16:57,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:16:57,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:16:57,602 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 06:16:57,611 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 06:16:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:16:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:16:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:16:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:16:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:16:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:16:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:16:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:16:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:16:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:16:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:16:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 06:16:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 06:16:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:16:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:16:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:16:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:16:57,637 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 06:16:57,747 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:16:57,748 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:16:57,988 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:16:58,069 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:16:58,069 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 06:16:58,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:16:58 BoogieIcfgContainer [2023-08-04 06:16:58,071 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:16:58,072 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:16:58,072 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:16:58,075 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:16:58,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:16:57" (1/3) ... [2023-08-04 06:16:58,075 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2a4a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:16:58, skipping insertion in model container [2023-08-04 06:16:58,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:16:57" (2/3) ... [2023-08-04 06:16:58,076 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2a4a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:16:58, skipping insertion in model container [2023-08-04 06:16:58,076 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:16:58" (3/3) ... [2023-08-04 06:16:58,083 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix053.opt_bound2.i [2023-08-04 06:16:58,088 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:16:58,095 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:16:58,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 06:16:58,095 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:16:58,156 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:16:58,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 153 transitions, 326 flow [2023-08-04 06:16:58,344 INFO L124 PetriNetUnfolderBase]: 62/923 cut-off events. [2023-08-04 06:16:58,344 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:16:58,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 923 events. 62/923 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5693 event pairs, 0 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 544. Up to 32 conditions per place. [2023-08-04 06:16:58,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 153 transitions, 326 flow [2023-08-04 06:16:58,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 150 transitions, 314 flow [2023-08-04 06:16:58,366 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:16:58,376 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 150 transitions, 314 flow [2023-08-04 06:16:58,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 150 transitions, 314 flow [2023-08-04 06:16:58,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 150 transitions, 314 flow [2023-08-04 06:16:58,466 INFO L124 PetriNetUnfolderBase]: 62/916 cut-off events. [2023-08-04 06:16:58,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:16:58,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 916 events. 62/916 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5622 event pairs, 0 based on Foata normal form. 0/800 useless extension candidates. Maximal degree in co-relation 530. Up to 32 conditions per place. [2023-08-04 06:16:58,481 INFO L119 LiptonReduction]: Number of co-enabled transitions 3644 [2023-08-04 06:17:01,371 INFO L134 LiptonReduction]: Checked pairs total: 8222 [2023-08-04 06:17:01,371 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-04 06:17:01,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:17:01,414 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;@4f2ba3f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:17:01,414 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:17:01,419 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:17:01,420 INFO L124 PetriNetUnfolderBase]: 1/38 cut-off events. [2023-08-04 06:17:01,420 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:17:01,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:17:01,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:17:01,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:17:01,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:17:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1263910450, now seen corresponding path program 1 times [2023-08-04 06:17:01,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:17:01,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144398914] [2023-08-04 06:17:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:01,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:17:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:01,893 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 06:17:01,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:17:01,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144398914] [2023-08-04 06:17:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144398914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:17:01,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:17:01,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:17:01,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239524897] [2023-08-04 06:17:01,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:17:01,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:17:01,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:17:01,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:17:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:17:01,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 284 [2023-08-04 06:17:01,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:01,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:17:01,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 284 [2023-08-04 06:17:01,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:17:02,756 INFO L124 PetriNetUnfolderBase]: 6092/8984 cut-off events. [2023-08-04 06:17:02,756 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 06:17:02,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17942 conditions, 8984 events. 6092/8984 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 52612 event pairs, 4314 based on Foata normal form. 0/7634 useless extension candidates. Maximal degree in co-relation 17928. Up to 8760 conditions per place. [2023-08-04 06:17:02,802 INFO L140 encePairwiseOnDemand]: 280/284 looper letters, 31 selfloop transitions, 2 changer transitions 1/38 dead transitions. [2023-08-04 06:17:02,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 158 flow [2023-08-04 06:17:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:17:02,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:17:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-04 06:17:02,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105633802816901 [2023-08-04 06:17:02,813 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-04 06:17:02,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-04 06:17:02,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:17:02,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-04 06:17:02,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:02,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:02,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:02,826 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 86 flow. Second operand 3 states and 435 transitions. [2023-08-04 06:17:02,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 158 flow [2023-08-04 06:17:02,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 38 transitions, 158 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:17:02,830 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 92 flow [2023-08-04 06:17:02,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2023-08-04 06:17:02,833 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 06:17:02,834 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 92 flow [2023-08-04 06:17:02,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:02,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:17:02,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:17:02,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:17:02,835 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:17:02,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:17:02,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1038968810, now seen corresponding path program 1 times [2023-08-04 06:17:02,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:17:02,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374198793] [2023-08-04 06:17:02,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:02,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:17:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:02,897 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 06:17:02,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:17:02,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374198793] [2023-08-04 06:17:02,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374198793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:17:02,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275517726] [2023-08-04 06:17:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:02,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:17:02,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:17:02,922 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 06:17:02,941 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 06:17:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:03,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:17:03,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:17:03,061 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 06:17:03,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:17:03,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275517726] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:17:03,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:17:03,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:17:03,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817355966] [2023-08-04 06:17:03,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:17:03,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:17:03,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:17:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:17:03,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:17:03,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 284 [2023-08-04 06:17:03,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:03,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:17:03,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 284 [2023-08-04 06:17:03,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:17:03,689 INFO L124 PetriNetUnfolderBase]: 4907/7144 cut-off events. [2023-08-04 06:17:03,690 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-04 06:17:03,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14227 conditions, 7144 events. 4907/7144 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40081 event pairs, 3571 based on Foata normal form. 0/6172 useless extension candidates. Maximal degree in co-relation 14210. Up to 6898 conditions per place. [2023-08-04 06:17:03,837 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 33 selfloop transitions, 2 changer transitions 1/40 dead transitions. [2023-08-04 06:17:03,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 40 transitions, 174 flow [2023-08-04 06:17:03,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:17:03,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:17:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-04 06:17:03,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117370892018779 [2023-08-04 06:17:03,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-04 06:17:03,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-04 06:17:03,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:17:03,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-04 06:17:03,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:03,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:03,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:03,845 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 92 flow. Second operand 3 states and 436 transitions. [2023-08-04 06:17:03,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 40 transitions, 174 flow [2023-08-04 06:17:03,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:17:03,846 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 96 flow [2023-08-04 06:17:03,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-04 06:17:03,847 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 06:17:03,847 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 96 flow [2023-08-04 06:17:03,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:03,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:17:03,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:17:03,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 06:17:04,057 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 06:17:04,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:17:04,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:17:04,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1254135373, now seen corresponding path program 1 times [2023-08-04 06:17:04,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:17:04,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040694077] [2023-08-04 06:17:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:04,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:17:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:04,142 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 06:17:04,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:17:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040694077] [2023-08-04 06:17:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040694077] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:17:04,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694121218] [2023-08-04 06:17:04,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:04,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:17:04,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:17:04,157 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 06:17:04,168 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 06:17:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:04,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:17:04,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:17:04,263 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 06:17:04,263 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:17:04,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694121218] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:17:04,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:17:04,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:17:04,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604359398] [2023-08-04 06:17:04,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:17:04,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:17:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:17:04,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:17:04,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:17:04,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 284 [2023-08-04 06:17:04,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 35 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:04,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:17:04,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 284 [2023-08-04 06:17:04,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:17:04,821 INFO L124 PetriNetUnfolderBase]: 4199/6137 cut-off events. [2023-08-04 06:17:04,821 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 06:17:04,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12161 conditions, 6137 events. 4199/6137 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33353 event pairs, 2966 based on Foata normal form. 0/5413 useless extension candidates. Maximal degree in co-relation 12144. Up to 5720 conditions per place. [2023-08-04 06:17:04,849 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 36 selfloop transitions, 2 changer transitions 1/43 dead transitions. [2023-08-04 06:17:04,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 190 flow [2023-08-04 06:17:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:17:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:17:04,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-04 06:17:04,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5152582159624414 [2023-08-04 06:17:04,851 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-04 06:17:04,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-04 06:17:04,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:17:04,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-04 06:17:04,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 06:17:04,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:04,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:04,854 INFO L175 Difference]: Start difference. First operand has 48 places, 35 transitions, 96 flow. Second operand 3 states and 439 transitions. [2023-08-04 06:17:04,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 190 flow [2023-08-04 06:17:04,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 43 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:17:04,855 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 100 flow [2023-08-04 06:17:04,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2023-08-04 06:17:04,856 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-04 06:17:04,856 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 100 flow [2023-08-04 06:17:04,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:04,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:17:04,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:17:04,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 06:17:05,062 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 06:17:05,062 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:17:05,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:17:05,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1950226715, now seen corresponding path program 1 times [2023-08-04 06:17:05,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:17:05,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64629740] [2023-08-04 06:17:05,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:05,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:17:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:05,156 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 06:17:05,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:17:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64629740] [2023-08-04 06:17:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64629740] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:17:05,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186517746] [2023-08-04 06:17:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:05,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:17:05,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:17:05,158 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 06:17:05,161 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 06:17:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:05,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:17:05,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:17:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 06:17:05,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:17:05,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186517746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:17:05,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:17:05,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:17:05,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871511905] [2023-08-04 06:17:05,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:17:05,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:17:05,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:17:05,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:17:05,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:17:05,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 284 [2023-08-04 06:17:05,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 100 flow. Second operand has 3 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 06:17:05,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:17:05,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 284 [2023-08-04 06:17:05,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:17:05,777 INFO L124 PetriNetUnfolderBase]: 3899/5549 cut-off events. [2023-08-04 06:17:05,777 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-04 06:17:05,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11307 conditions, 5549 events. 3899/5549 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 28529 event pairs, 2870 based on Foata normal form. 0/4933 useless extension candidates. Maximal degree in co-relation 11289. Up to 4625 conditions per place. [2023-08-04 06:17:05,807 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 41 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 06:17:05,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 210 flow [2023-08-04 06:17:05,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:17:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:17:05,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-04 06:17:05,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5199530516431925 [2023-08-04 06:17:05,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-04 06:17:05,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-04 06:17:05,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:17:05,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-04 06:17:05,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:05,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:05,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 284.0) internal successors, (1136), 4 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:05,812 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 100 flow. Second operand 3 states and 443 transitions. [2023-08-04 06:17:05,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 210 flow [2023-08-04 06:17:05,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:17:05,815 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 104 flow [2023-08-04 06:17:05,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2023-08-04 06:17:05,816 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-08-04 06:17:05,816 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 104 flow [2023-08-04 06:17:05,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 06:17:05,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:17:05,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:17:05,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 06:17:06,022 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 06:17:06,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:17:06,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:17:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1950246736, now seen corresponding path program 1 times [2023-08-04 06:17:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:17:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818199438] [2023-08-04 06:17:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:06,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:17:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:06,094 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 06:17:06,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:17:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818199438] [2023-08-04 06:17:06,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818199438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:17:06,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409389477] [2023-08-04 06:17:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:06,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:17:06,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:17:06,115 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 06:17:06,141 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 06:17:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:06,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:17:06,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:17:06,247 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 06:17:06,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:17:06,265 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 06:17:06,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409389477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:17:06,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:17:06,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:17:06,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037825865] [2023-08-04 06:17:06,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:17:06,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:17:06,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:17:06,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:17:06,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:17:06,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 284 [2023-08-04 06:17:06,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:06,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:17:06,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 284 [2023-08-04 06:17:06,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:17:06,290 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:17:06,290 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:17:06,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 19 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 06:17:06,291 INFO L140 encePairwiseOnDemand]: 281/284 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:17:06,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 10 transitions, 43 flow [2023-08-04 06:17:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:17:06,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:17:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 538 transitions. [2023-08-04 06:17:06,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735915492957746 [2023-08-04 06:17:06,292 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 538 transitions. [2023-08-04 06:17:06,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 538 transitions. [2023-08-04 06:17:06,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:17:06,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 538 transitions. [2023-08-04 06:17:06,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:06,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:06,296 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 284.0) internal successors, (1420), 5 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:06,296 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 104 flow. Second operand 4 states and 538 transitions. [2023-08-04 06:17:06,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 10 transitions, 43 flow [2023-08-04 06:17:06,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:17:06,296 INFO L231 Difference]: Finished difference. Result has 20 places, 0 transitions, 0 flow [2023-08-04 06:17:06,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=284, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=20, PETRI_TRANSITIONS=0} [2023-08-04 06:17:06,297 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -24 predicate places. [2023-08-04 06:17:06,297 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 0 transitions, 0 flow [2023-08-04 06:17:06,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:06,299 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P3Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 06:17:06,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 06:17:06,300 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 06:17:06,315 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 06:17:06,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:17:06,505 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 06:17:06,507 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 06:17:06,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 153 transitions, 326 flow [2023-08-04 06:17:06,579 INFO L124 PetriNetUnfolderBase]: 62/923 cut-off events. [2023-08-04 06:17:06,579 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:17:06,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 973 conditions, 923 events. 62/923 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5693 event pairs, 0 based on Foata normal form. 0/807 useless extension candidates. Maximal degree in co-relation 544. Up to 32 conditions per place. [2023-08-04 06:17:06,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 153 transitions, 326 flow [2023-08-04 06:17:06,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 122 transitions, 264 flow [2023-08-04 06:17:06,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:17:06,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 122 transitions, 264 flow [2023-08-04 06:17:06,583 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 122 transitions, 264 flow [2023-08-04 06:17:06,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 122 transitions, 264 flow [2023-08-04 06:17:06,609 INFO L124 PetriNetUnfolderBase]: 14/427 cut-off events. [2023-08-04 06:17:06,609 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:17:06,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 427 events. 14/427 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1958 event pairs, 0 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 296. Up to 16 conditions per place. [2023-08-04 06:17:06,612 INFO L119 LiptonReduction]: Number of co-enabled transitions 2104 [2023-08-04 06:17:09,353 INFO L134 LiptonReduction]: Checked pairs total: 4979 [2023-08-04 06:17:09,353 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 06:17:09,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:17:09,355 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;@4f2ba3f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:17:09,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:17:09,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:17:09,358 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 06:17:09,358 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:17:09,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:17:09,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:17:09,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 06:17:09,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:17:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash -30865293, now seen corresponding path program 1 times [2023-08-04 06:17:09,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:17:09,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248230454] [2023-08-04 06:17:09,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:09,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:17:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:17:09,379 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:17:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:17:09,406 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:17:09,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:17:09,406 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 06:17:09,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 06:17:09,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 06:17:09,407 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 06:17:09,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:17:09,407 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:17:09,408 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:17:09,409 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:17:09,409 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:17:09,432 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:17:09,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 183 transitions, 414 flow [2023-08-04 06:17:09,819 INFO L124 PetriNetUnfolderBase]: 282/4295 cut-off events. [2023-08-04 06:17:09,820 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 06:17:09,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4584 conditions, 4295 events. 282/4295 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 41731 event pairs, 0 based on Foata normal form. 0/3758 useless extension candidates. Maximal degree in co-relation 3090. Up to 162 conditions per place. [2023-08-04 06:17:09,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 194 places, 183 transitions, 414 flow [2023-08-04 06:17:09,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 191 places, 180 transitions, 396 flow [2023-08-04 06:17:09,858 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:17:09,858 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 191 places, 180 transitions, 396 flow [2023-08-04 06:17:09,858 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 191 places, 180 transitions, 396 flow [2023-08-04 06:17:09,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 191 places, 180 transitions, 396 flow [2023-08-04 06:17:10,201 INFO L124 PetriNetUnfolderBase]: 282/4282 cut-off events. [2023-08-04 06:17:10,202 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-08-04 06:17:10,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4545 conditions, 4282 events. 282/4282 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 41536 event pairs, 0 based on Foata normal form. 0/3745 useless extension candidates. Maximal degree in co-relation 3060. Up to 162 conditions per place. [2023-08-04 06:17:10,274 INFO L119 LiptonReduction]: Number of co-enabled transitions 8836 [2023-08-04 06:17:13,488 INFO L134 LiptonReduction]: Checked pairs total: 23200 [2023-08-04 06:17:13,488 INFO L136 LiptonReduction]: Total number of compositions: 140 [2023-08-04 06:17:13,492 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:17:13,494 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;@4f2ba3f2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:17:13,494 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:17:13,497 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:17:13,497 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-08-04 06:17:13,497 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 06:17:13,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:17:13,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:17:13,497 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:17:13,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:17:13,498 INFO L85 PathProgramCache]: Analyzing trace with hash 720154440, now seen corresponding path program 1 times [2023-08-04 06:17:13,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:17:13,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787587568] [2023-08-04 06:17:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:17:13,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:17:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:17:13,543 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 06:17:13,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:17:13,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787587568] [2023-08-04 06:17:13,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787587568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:17:13,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:17:13,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:17:13,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807771829] [2023-08-04 06:17:13,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:17:13,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:17:13,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:17:13,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:17:13,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:17:13,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 323 [2023-08-04 06:17:13,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:17:13,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:17:13,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 323 [2023-08-04 06:17:13,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand