./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix002.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix002.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 18:09:55,524 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 18:09:55,643 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 18:09:55,647 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 18:09:55,647 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 18:09:55,686 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 18:09:55,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 18:09:55,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 18:09:55,688 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 18:09:55,692 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 18:09:55,692 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 18:09:55,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 18:09:55,693 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 18:09:55,694 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 18:09:55,694 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 18:09:55,694 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 18:09:55,695 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 18:09:55,695 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 18:09:55,700 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 18:09:55,701 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 18:09:55,701 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 18:09:55,702 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 18:09:55,702 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 18:09:55,702 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 18:09:55,702 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 18:09:55,702 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 18:09:55,703 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 18:09:55,703 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 18:09:55,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 18:09:55,704 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 18:09:55,705 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 18:09:55,705 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 18:09:55,705 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:09:55,705 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 18:09:55,705 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 18:09:55,706 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 18:09:55,706 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 18:09:55,706 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 18:09:55,706 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 18:09:55,706 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 18:09:55,706 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 18:09:55,707 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 18:09:55,707 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 18:09:55,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-06-27 18:09:56,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 18:09:56,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 18:09:56,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 18:09:56,151 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 18:09:56,151 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 18:09:56,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix002.opt.yml/witness.yml [2024-06-27 18:09:56,441 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 18:09:56,442 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 18:09:56,443 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-27 18:09:58,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 18:09:58,467 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 18:09:58,493 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-27 18:09:58,518 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814bdb27f/3a33196fb012479484033aea15f201a7/FLAG077a65f5d [2024-06-27 18:09:58,544 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814bdb27f/3a33196fb012479484033aea15f201a7 [2024-06-27 18:09:58,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 18:09:58,545 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 18:09:58,546 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 18:09:58,546 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 18:09:58,550 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 18:09:58,558 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:09:56" (1/2) ... [2024-06-27 18:09:58,559 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb8c7ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:09:58, skipping insertion in model container [2024-06-27 18:09:58,559 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:09:56" (1/2) ... [2024-06-27 18:09:58,560 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@10706a4f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 06:09:58, skipping insertion in model container [2024-06-27 18:09:58,560 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:09:58" (2/2) ... [2024-06-27 18:09:58,561 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cb8c7ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:58, skipping insertion in model container [2024-06-27 18:09:58,561 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 06:09:58" (2/2) ... [2024-06-27 18:09:58,561 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 18:09:58,738 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 18:09:58,739 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0) [2024-06-27 18:09:58,739 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0) [2024-06-27 18:09:58,739 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0) [2024-06-27 18:09:58,740 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 18:09:58,740 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-27 18:09:58,797 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 18:09:59,043 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i[944,957] [2024-06-27 18:09:59,321 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:09:59,354 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-06-27 18:09:59,407 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i[944,957] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 18:09:59,582 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 18:09:59,645 INFO L206 MainTranslator]: Completed translation [2024-06-27 18:09:59,645 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59 WrapperNode [2024-06-27 18:09:59,646 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 18:09:59,647 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 18:09:59,647 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 18:09:59,647 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 18:09:59,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,681 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,753 INFO L138 Inliner]: procedures = 175, calls = 50, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 148 [2024-06-27 18:09:59,754 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 18:09:59,755 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 18:09:59,755 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 18:09:59,755 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 18:09:59,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,785 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,840 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 18:09:59,840 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,847 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,881 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,883 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,884 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 18:09:59,896 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 18:09:59,897 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 18:09:59,897 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 18:09:59,897 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (1/1) ... [2024-06-27 18:09:59,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 18:09:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 18:09:59,986 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 18:10:00,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 18:10:00,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 18:10:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 18:10:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 18:10:00,059 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 18:10:00,059 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 18:10:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 18:10:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 18:10:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 18:10:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 18:10:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 18:10:00,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 18:10:00,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 18:10:00,064 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 18:10:00,288 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 18:10:00,291 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 18:10:00,896 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 18:10:00,897 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 18:10:01,209 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 18:10:01,209 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 18:10:01,210 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:10:01 BoogieIcfgContainer [2024-06-27 18:10:01,210 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 18:10:01,225 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 18:10:01,226 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 18:10:01,228 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 18:10:01,229 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 06:09:56" (1/4) ... [2024-06-27 18:10:01,230 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e18f4e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 06:10:01, skipping insertion in model container [2024-06-27 18:10:01,230 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 06:09:58" (2/4) ... [2024-06-27 18:10:01,231 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e18f4e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:10:01, skipping insertion in model container [2024-06-27 18:10:01,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 06:09:59" (3/4) ... [2024-06-27 18:10:01,232 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e18f4e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 06:10:01, skipping insertion in model container [2024-06-27 18:10:01,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 06:10:01" (4/4) ... [2024-06-27 18:10:01,233 INFO L112 eAbstractionObserver]: Analyzing ICFG mix002.opt.i [2024-06-27 18:10:01,261 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 18:10:01,262 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-06-27 18:10:01,262 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 18:10:01,394 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 18:10:01,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 50 transitions, 112 flow [2024-06-27 18:10:01,489 INFO L124 PetriNetUnfolderBase]: 1/47 cut-off events. [2024-06-27 18:10:01,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:10:01,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 47 events. 1/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 88 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2024-06-27 18:10:01,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 50 transitions, 112 flow [2024-06-27 18:10:01,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 47 transitions, 103 flow [2024-06-27 18:10:01,537 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 18:10:01,557 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@4b98de23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 18:10:01,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-06-27 18:10:01,562 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 18:10:01,562 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 18:10:01,562 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 18:10:01,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:01,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 18:10:01,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:01,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash 374670426, now seen corresponding path program 1 times [2024-06-27 18:10:01,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:01,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395826551] [2024-06-27 18:10:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:03,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:03,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395826551] [2024-06-27 18:10:03,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395826551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:03,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:03,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:10:03,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984612120] [2024-06-27 18:10:03,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:03,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:10:03,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:03,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:10:03,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:10:03,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-06-27 18:10:03,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:03,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:03,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-06-27 18:10:03,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:04,919 INFO L124 PetriNetUnfolderBase]: 3005/5085 cut-off events. [2024-06-27 18:10:04,932 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 18:10:04,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9500 conditions, 5085 events. 3005/5085 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 34696 event pairs, 2435 based on Foata normal form. 151/4810 useless extension candidates. Maximal degree in co-relation 9488. Up to 4336 conditions per place. [2024-06-27 18:10:04,987 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 40 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-06-27 18:10:04,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 227 flow [2024-06-27 18:10:04,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:10:04,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:10:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-06-27 18:10:05,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7133333333333334 [2024-06-27 18:10:05,021 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 103 flow. Second operand 3 states and 107 transitions. [2024-06-27 18:10:05,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 227 flow [2024-06-27 18:10:05,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 222 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 18:10:05,030 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 135 flow [2024-06-27 18:10:05,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-27 18:10:05,035 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 0 predicate places. [2024-06-27 18:10:05,035 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 135 flow [2024-06-27 18:10:05,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:05,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:05,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:05,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 18:10:05,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:05,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:05,036 INFO L85 PathProgramCache]: Analyzing trace with hash -718942919, now seen corresponding path program 1 times [2024-06-27 18:10:05,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:05,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109117616] [2024-06-27 18:10:05,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:05,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:06,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:06,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109117616] [2024-06-27 18:10:06,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109117616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:06,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:06,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 18:10:06,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935016606] [2024-06-27 18:10:06,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:06,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 18:10:06,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 18:10:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 18:10:06,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-27 18:10:06,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:06,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:06,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-27 18:10:06,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:07,548 INFO L124 PetriNetUnfolderBase]: 3428/5193 cut-off events. [2024-06-27 18:10:07,548 INFO L125 PetriNetUnfolderBase]: For 788/788 co-relation queries the response was YES. [2024-06-27 18:10:07,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11403 conditions, 5193 events. 3428/5193 cut-off events. For 788/788 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31650 event pairs, 1817 based on Foata normal form. 3/4947 useless extension candidates. Maximal degree in co-relation 11391. Up to 4908 conditions per place. [2024-06-27 18:10:07,575 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 52 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-06-27 18:10:07,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 323 flow [2024-06-27 18:10:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 18:10:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 18:10:07,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-27 18:10:07,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-27 18:10:07,580 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 135 flow. Second operand 4 states and 136 transitions. [2024-06-27 18:10:07,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 323 flow [2024-06-27 18:10:07,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 18:10:07,583 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 181 flow [2024-06-27 18:10:07,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 18:10:07,584 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2024-06-27 18:10:07,584 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 181 flow [2024-06-27 18:10:07,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:07,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:07,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:07,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 18:10:07,587 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:07,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:07,587 INFO L85 PathProgramCache]: Analyzing trace with hash -812392993, now seen corresponding path program 1 times [2024-06-27 18:10:07,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:07,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165149397] [2024-06-27 18:10:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:07,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:09,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:09,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:09,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165149397] [2024-06-27 18:10:09,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165149397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:09,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:09,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 18:10:09,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467836503] [2024-06-27 18:10:09,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:09,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 18:10:09,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:09,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 18:10:09,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 18:10:09,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-27 18:10:09,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:09,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:09,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-27 18:10:09,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:10,088 INFO L124 PetriNetUnfolderBase]: 4170/6695 cut-off events. [2024-06-27 18:10:10,089 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2024-06-27 18:10:10,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15479 conditions, 6695 events. 4170/6695 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 43460 event pairs, 2241 based on Foata normal form. 3/6272 useless extension candidates. Maximal degree in co-relation 15465. Up to 5928 conditions per place. [2024-06-27 18:10:10,129 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 64 selfloop transitions, 13 changer transitions 0/91 dead transitions. [2024-06-27 18:10:10,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 91 transitions, 433 flow [2024-06-27 18:10:10,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:10:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:10:10,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-27 18:10:10,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-27 18:10:10,131 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 181 flow. Second operand 5 states and 165 transitions. [2024-06-27 18:10:10,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 91 transitions, 433 flow [2024-06-27 18:10:10,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 91 transitions, 414 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-27 18:10:10,134 INFO L231 Difference]: Finished difference. Result has 62 places, 58 transitions, 227 flow [2024-06-27 18:10:10,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=62, PETRI_TRANSITIONS=58} [2024-06-27 18:10:10,135 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-27 18:10:10,135 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 58 transitions, 227 flow [2024-06-27 18:10:10,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:10,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:10,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:10,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 18:10:10,136 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:10,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash 751855820, now seen corresponding path program 1 times [2024-06-27 18:10:10,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:10,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970934865] [2024-06-27 18:10:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:10,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:11,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:11,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:11,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970934865] [2024-06-27 18:10:11,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970934865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:11,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:11,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:10:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850894786] [2024-06-27 18:10:11,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:11,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:10:11,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:10:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:10:11,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-27 18:10:11,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 58 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:11,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:11,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-27 18:10:11,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:12,816 INFO L124 PetriNetUnfolderBase]: 4163/6914 cut-off events. [2024-06-27 18:10:12,817 INFO L125 PetriNetUnfolderBase]: For 4792/4792 co-relation queries the response was YES. [2024-06-27 18:10:12,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16986 conditions, 6914 events. 4163/6914 cut-off events. For 4792/4792 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 47195 event pairs, 2406 based on Foata normal form. 3/6465 useless extension candidates. Maximal degree in co-relation 16971. Up to 5895 conditions per place. [2024-06-27 18:10:12,939 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 75 selfloop transitions, 17 changer transitions 0/106 dead transitions. [2024-06-27 18:10:12,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 106 transitions, 541 flow [2024-06-27 18:10:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:10:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:10:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 197 transitions. [2024-06-27 18:10:12,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6566666666666666 [2024-06-27 18:10:12,942 INFO L175 Difference]: Start difference. First operand has 62 places, 58 transitions, 227 flow. Second operand 6 states and 197 transitions. [2024-06-27 18:10:12,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 106 transitions, 541 flow [2024-06-27 18:10:12,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 106 transitions, 508 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 18:10:12,948 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 273 flow [2024-06-27 18:10:12,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=273, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-27 18:10:12,950 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 9 predicate places. [2024-06-27 18:10:12,950 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 273 flow [2024-06-27 18:10:12,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:12,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:12,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:12,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 18:10:12,951 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:12,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash 479800109, now seen corresponding path program 1 times [2024-06-27 18:10:12,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:12,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504571419] [2024-06-27 18:10:12,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:13,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:13,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504571419] [2024-06-27 18:10:13,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504571419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:13,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:13,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:10:13,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382659587] [2024-06-27 18:10:13,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:13,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:10:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:13,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:10:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:10:13,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:10:13,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 273 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:13,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:13,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:10:13,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:14,704 INFO L124 PetriNetUnfolderBase]: 5714/8585 cut-off events. [2024-06-27 18:10:14,705 INFO L125 PetriNetUnfolderBase]: For 8424/8424 co-relation queries the response was YES. [2024-06-27 18:10:14,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23584 conditions, 8585 events. 5714/8585 cut-off events. For 8424/8424 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 52230 event pairs, 2389 based on Foata normal form. 2/8213 useless extension candidates. Maximal degree in co-relation 23567. Up to 8093 conditions per place. [2024-06-27 18:10:14,750 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 64 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-06-27 18:10:14,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 495 flow [2024-06-27 18:10:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:10:14,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:10:14,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 18:10:14,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-27 18:10:14,753 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 273 flow. Second operand 5 states and 140 transitions. [2024-06-27 18:10:14,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 495 flow [2024-06-27 18:10:14,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 448 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:10:14,764 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 289 flow [2024-06-27 18:10:14,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-27 18:10:14,766 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-27 18:10:14,769 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 289 flow [2024-06-27 18:10:14,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:14,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:14,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:14,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 18:10:14,770 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:14,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1988903115, now seen corresponding path program 1 times [2024-06-27 18:10:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:14,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647271698] [2024-06-27 18:10:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:15,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647271698] [2024-06-27 18:10:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647271698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:15,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:15,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:10:15,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755682721] [2024-06-27 18:10:15,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:15,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:10:15,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:10:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:10:15,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:10:15,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 289 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:15,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:15,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:10:15,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:16,676 INFO L124 PetriNetUnfolderBase]: 5708/8662 cut-off events. [2024-06-27 18:10:16,676 INFO L125 PetriNetUnfolderBase]: For 11139/11139 co-relation queries the response was YES. [2024-06-27 18:10:16,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25051 conditions, 8662 events. 5708/8662 cut-off events. For 11139/11139 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 53009 event pairs, 2285 based on Foata normal form. 4/8326 useless extension candidates. Maximal degree in co-relation 25032. Up to 8039 conditions per place. [2024-06-27 18:10:16,724 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 74 selfloop transitions, 14 changer transitions 0/101 dead transitions. [2024-06-27 18:10:16,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 101 transitions, 567 flow [2024-06-27 18:10:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:10:16,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:10:16,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-27 18:10:16,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-06-27 18:10:16,726 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 289 flow. Second operand 6 states and 169 transitions. [2024-06-27 18:10:16,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 101 transitions, 567 flow [2024-06-27 18:10:16,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 101 transitions, 534 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 18:10:16,733 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 333 flow [2024-06-27 18:10:16,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=333, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-27 18:10:16,735 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 13 predicate places. [2024-06-27 18:10:16,735 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 333 flow [2024-06-27 18:10:16,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:16,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:16,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:16,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 18:10:16,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:16,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1987789518, now seen corresponding path program 1 times [2024-06-27 18:10:16,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:16,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572408611] [2024-06-27 18:10:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:16,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572408611] [2024-06-27 18:10:16,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572408611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:16,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:16,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 18:10:16,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079721640] [2024-06-27 18:10:16,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:16,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 18:10:16,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 18:10:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 18:10:16,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 50 [2024-06-27 18:10:16,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:16,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:16,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 50 [2024-06-27 18:10:16,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:17,068 INFO L124 PetriNetUnfolderBase]: 1523/2949 cut-off events. [2024-06-27 18:10:17,068 INFO L125 PetriNetUnfolderBase]: For 5796/6120 co-relation queries the response was YES. [2024-06-27 18:10:17,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7559 conditions, 2949 events. 1523/2949 cut-off events. For 5796/6120 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22158 event pairs, 339 based on Foata normal form. 2/2703 useless extension candidates. Maximal degree in co-relation 7540. Up to 1833 conditions per place. [2024-06-27 18:10:17,087 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 26 selfloop transitions, 8 changer transitions 0/71 dead transitions. [2024-06-27 18:10:17,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 71 transitions, 364 flow [2024-06-27 18:10:17,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 18:10:17,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 18:10:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-06-27 18:10:17,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7533333333333333 [2024-06-27 18:10:17,089 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 333 flow. Second operand 3 states and 113 transitions. [2024-06-27 18:10:17,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 71 transitions, 364 flow [2024-06-27 18:10:17,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 71 transitions, 332 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 18:10:17,091 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 264 flow [2024-06-27 18:10:17,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 18:10:17,093 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-27 18:10:17,093 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 264 flow [2024-06-27 18:10:17,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:17,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:17,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:17,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 18:10:17,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:17,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:17,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1518827596, now seen corresponding path program 1 times [2024-06-27 18:10:17,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:17,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059721638] [2024-06-27 18:10:17,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:17,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:17,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:17,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059721638] [2024-06-27 18:10:17,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059721638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:17,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:17,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:10:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232679096] [2024-06-27 18:10:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:17,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:10:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:10:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:10:17,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:10:17,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:17,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:17,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:10:17,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:18,849 INFO L124 PetriNetUnfolderBase]: 5695/8331 cut-off events. [2024-06-27 18:10:18,849 INFO L125 PetriNetUnfolderBase]: For 17747/17753 co-relation queries the response was YES. [2024-06-27 18:10:18,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24773 conditions, 8331 events. 5695/8331 cut-off events. For 17747/17753 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 48132 event pairs, 2299 based on Foata normal form. 6/8331 useless extension candidates. Maximal degree in co-relation 24754. Up to 8056 conditions per place. [2024-06-27 18:10:18,898 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 75 selfloop transitions, 16 changer transitions 1/104 dead transitions. [2024-06-27 18:10:18,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 104 transitions, 600 flow [2024-06-27 18:10:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:10:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:10:18,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-27 18:10:18,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2024-06-27 18:10:18,901 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 264 flow. Second operand 6 states and 166 transitions. [2024-06-27 18:10:18,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 104 transitions, 600 flow [2024-06-27 18:10:18,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-27 18:10:18,909 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 338 flow [2024-06-27 18:10:18,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-27 18:10:18,910 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2024-06-27 18:10:18,911 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 338 flow [2024-06-27 18:10:18,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:18,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:18,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:18,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 18:10:18,911 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:18,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:18,912 INFO L85 PathProgramCache]: Analyzing trace with hash -2080781490, now seen corresponding path program 2 times [2024-06-27 18:10:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:18,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160216855] [2024-06-27 18:10:18,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:18,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:19,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:19,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160216855] [2024-06-27 18:10:19,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160216855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:19,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:19,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:10:19,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871951655] [2024-06-27 18:10:19,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:19,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:10:19,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:10:19,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:10:19,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:10:19,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:19,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:19,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:10:19,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:20,638 INFO L124 PetriNetUnfolderBase]: 5690/8325 cut-off events. [2024-06-27 18:10:20,638 INFO L125 PetriNetUnfolderBase]: For 20652/20667 co-relation queries the response was YES. [2024-06-27 18:10:20,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25877 conditions, 8325 events. 5690/8325 cut-off events. For 20652/20667 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 48044 event pairs, 2302 based on Foata normal form. 12/8330 useless extension candidates. Maximal degree in co-relation 25856. Up to 8051 conditions per place. [2024-06-27 18:10:20,685 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 69 selfloop transitions, 16 changer transitions 2/99 dead transitions. [2024-06-27 18:10:20,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 580 flow [2024-06-27 18:10:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:10:20,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:10:20,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 18:10:20,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-27 18:10:20,687 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 338 flow. Second operand 6 states and 161 transitions. [2024-06-27 18:10:20,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 580 flow [2024-06-27 18:10:20,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 99 transitions, 544 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-27 18:10:20,697 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 342 flow [2024-06-27 18:10:20,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=342, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-06-27 18:10:20,698 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2024-06-27 18:10:20,698 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 342 flow [2024-06-27 18:10:20,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:20,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:20,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:20,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 18:10:20,699 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:20,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:20,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1975535739, now seen corresponding path program 1 times [2024-06-27 18:10:20,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:20,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785749590] [2024-06-27 18:10:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:20,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:20,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:22,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:22,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785749590] [2024-06-27 18:10:22,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785749590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:22,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:22,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:10:22,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838225793] [2024-06-27 18:10:22,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:22,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:10:22,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:22,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:10:22,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:10:23,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:10:23,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 342 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:23,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:23,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:10:23,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:24,195 INFO L124 PetriNetUnfolderBase]: 5001/8274 cut-off events. [2024-06-27 18:10:24,196 INFO L125 PetriNetUnfolderBase]: For 23257/23305 co-relation queries the response was YES. [2024-06-27 18:10:24,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24179 conditions, 8274 events. 5001/8274 cut-off events. For 23257/23305 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 56271 event pairs, 2265 based on Foata normal form. 14/7966 useless extension candidates. Maximal degree in co-relation 24157. Up to 7001 conditions per place. [2024-06-27 18:10:24,287 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 102 selfloop transitions, 18 changer transitions 1/137 dead transitions. [2024-06-27 18:10:24,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 137 transitions, 760 flow [2024-06-27 18:10:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:10:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:10:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-06-27 18:10:24,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6075 [2024-06-27 18:10:24,289 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 342 flow. Second operand 8 states and 243 transitions. [2024-06-27 18:10:24,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 137 transitions, 760 flow [2024-06-27 18:10:24,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 720 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-27 18:10:24,298 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 381 flow [2024-06-27 18:10:24,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=381, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-06-27 18:10:24,298 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 21 predicate places. [2024-06-27 18:10:24,299 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 381 flow [2024-06-27 18:10:24,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:24,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:24,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:24,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 18:10:24,299 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:24,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:24,300 INFO L85 PathProgramCache]: Analyzing trace with hash -161162894, now seen corresponding path program 1 times [2024-06-27 18:10:24,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:24,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505985876] [2024-06-27 18:10:24,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:24,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:25,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:25,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:25,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505985876] [2024-06-27 18:10:25,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505985876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:25,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:25,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:10:25,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317697745] [2024-06-27 18:10:25,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:25,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:10:25,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:10:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:10:25,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:25,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:25,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:25,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:25,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:26,280 INFO L124 PetriNetUnfolderBase]: 6000/8666 cut-off events. [2024-06-27 18:10:26,281 INFO L125 PetriNetUnfolderBase]: For 29240/29246 co-relation queries the response was YES. [2024-06-27 18:10:26,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28620 conditions, 8666 events. 6000/8666 cut-off events. For 29240/29246 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 48941 event pairs, 1811 based on Foata normal form. 6/8666 useless extension candidates. Maximal degree in co-relation 28596. Up to 8370 conditions per place. [2024-06-27 18:10:26,331 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 87 selfloop transitions, 24 changer transitions 5/126 dead transitions. [2024-06-27 18:10:26,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 126 transitions, 813 flow [2024-06-27 18:10:26,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:10:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:10:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 18:10:26,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 18:10:26,333 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 381 flow. Second operand 7 states and 189 transitions. [2024-06-27 18:10:26,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 126 transitions, 813 flow [2024-06-27 18:10:26,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 126 transitions, 760 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 18:10:26,345 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 444 flow [2024-06-27 18:10:26,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-27 18:10:26,346 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-27 18:10:26,346 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 444 flow [2024-06-27 18:10:26,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:26,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:26,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:26,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 18:10:26,347 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:26,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -160983156, now seen corresponding path program 1 times [2024-06-27 18:10:26,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:26,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598732600] [2024-06-27 18:10:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:26,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:27,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:27,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598732600] [2024-06-27 18:10:27,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598732600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:27,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:27,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:10:27,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147404459] [2024-06-27 18:10:27,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:27,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:10:27,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:27,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:10:27,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:10:27,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:10:27,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 444 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:27,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:27,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:10:27,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:28,339 INFO L124 PetriNetUnfolderBase]: 5043/7425 cut-off events. [2024-06-27 18:10:28,339 INFO L125 PetriNetUnfolderBase]: For 32555/32561 co-relation queries the response was YES. [2024-06-27 18:10:28,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25785 conditions, 7425 events. 5043/7425 cut-off events. For 32555/32561 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 42303 event pairs, 1507 based on Foata normal form. 5/7421 useless extension candidates. Maximal degree in co-relation 25759. Up to 7002 conditions per place. [2024-06-27 18:10:28,390 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 90 selfloop transitions, 23 changer transitions 0/127 dead transitions. [2024-06-27 18:10:28,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 868 flow [2024-06-27 18:10:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:10:28,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:10:28,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-27 18:10:28,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457142857142857 [2024-06-27 18:10:28,408 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 444 flow. Second operand 7 states and 191 transitions. [2024-06-27 18:10:28,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 868 flow [2024-06-27 18:10:28,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 824 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-27 18:10:28,430 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 520 flow [2024-06-27 18:10:28,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=400, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=520, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-06-27 18:10:28,431 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 26 predicate places. [2024-06-27 18:10:28,431 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 520 flow [2024-06-27 18:10:28,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:28,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:28,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:28,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 18:10:28,432 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:28,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:28,432 INFO L85 PathProgramCache]: Analyzing trace with hash -160983404, now seen corresponding path program 2 times [2024-06-27 18:10:28,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:28,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683080273] [2024-06-27 18:10:28,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:28,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:29,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:29,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:29,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683080273] [2024-06-27 18:10:29,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683080273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:29,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:29,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:10:29,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799999054] [2024-06-27 18:10:29,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:29,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:10:29,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:10:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:10:29,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:29,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 520 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:29,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:29,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:29,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:30,345 INFO L124 PetriNetUnfolderBase]: 5314/7699 cut-off events. [2024-06-27 18:10:30,346 INFO L125 PetriNetUnfolderBase]: For 39247/39250 co-relation queries the response was YES. [2024-06-27 18:10:30,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28278 conditions, 7699 events. 5314/7699 cut-off events. For 39247/39250 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 42741 event pairs, 1586 based on Foata normal form. 4/7697 useless extension candidates. Maximal degree in co-relation 28250. Up to 7423 conditions per place. [2024-06-27 18:10:30,395 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 26 changer transitions 0/127 dead transitions. [2024-06-27 18:10:30,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 127 transitions, 920 flow [2024-06-27 18:10:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:10:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:10:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:10:30,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:10:30,397 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 520 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:10:30,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 127 transitions, 920 flow [2024-06-27 18:10:30,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 127 transitions, 882 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:10:30,428 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 572 flow [2024-06-27 18:10:30,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=572, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-06-27 18:10:30,429 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-27 18:10:30,429 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 572 flow [2024-06-27 18:10:30,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:30,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:30,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:30,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 18:10:30,430 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:30,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:30,430 INFO L85 PathProgramCache]: Analyzing trace with hash -93718136, now seen corresponding path program 2 times [2024-06-27 18:10:30,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:30,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597718668] [2024-06-27 18:10:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:30,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:31,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:31,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597718668] [2024-06-27 18:10:31,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597718668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:31,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:31,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:10:31,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776872067] [2024-06-27 18:10:31,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:31,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:10:31,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:31,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:10:31,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:10:31,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:10:31,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 572 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:31,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:31,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:10:31,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:32,753 INFO L124 PetriNetUnfolderBase]: 5112/7525 cut-off events. [2024-06-27 18:10:32,753 INFO L125 PetriNetUnfolderBase]: For 42824/42836 co-relation queries the response was YES. [2024-06-27 18:10:32,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27916 conditions, 7525 events. 5112/7525 cut-off events. For 42824/42836 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 42810 event pairs, 1496 based on Foata normal form. 12/7530 useless extension candidates. Maximal degree in co-relation 27886. Up to 7064 conditions per place. [2024-06-27 18:10:32,823 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 87 selfloop transitions, 27 changer transitions 0/129 dead transitions. [2024-06-27 18:10:32,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 129 transitions, 972 flow [2024-06-27 18:10:32,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:10:32,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:10:32,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 18:10:32,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-06-27 18:10:32,825 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 572 flow. Second operand 7 states and 186 transitions. [2024-06-27 18:10:32,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 129 transitions, 972 flow [2024-06-27 18:10:32,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 129 transitions, 918 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 18:10:32,875 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 616 flow [2024-06-27 18:10:32,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=616, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-06-27 18:10:32,876 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 33 predicate places. [2024-06-27 18:10:32,876 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 616 flow [2024-06-27 18:10:32,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:32,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:32,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:32,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 18:10:32,877 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:32,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:32,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1049442342, now seen corresponding path program 3 times [2024-06-27 18:10:32,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:32,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296256280] [2024-06-27 18:10:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:32,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:33,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:33,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296256280] [2024-06-27 18:10:33,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296256280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:33,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:33,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:10:33,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786035022] [2024-06-27 18:10:33,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:33,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:10:33,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:33,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:10:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:10:33,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:33,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 616 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:33,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:33,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:33,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:35,256 INFO L124 PetriNetUnfolderBase]: 5355/7772 cut-off events. [2024-06-27 18:10:35,257 INFO L125 PetriNetUnfolderBase]: For 47525/47540 co-relation queries the response was YES. [2024-06-27 18:10:35,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29333 conditions, 7772 events. 5355/7772 cut-off events. For 47525/47540 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 43204 event pairs, 1600 based on Foata normal form. 9/7772 useless extension candidates. Maximal degree in co-relation 29302. Up to 7482 conditions per place. [2024-06-27 18:10:35,309 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 89 selfloop transitions, 26 changer transitions 0/125 dead transitions. [2024-06-27 18:10:35,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 125 transitions, 926 flow [2024-06-27 18:10:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:10:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:10:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:10:35,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-06-27 18:10:35,312 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 616 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:10:35,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 125 transitions, 926 flow [2024-06-27 18:10:35,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 844 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 18:10:35,354 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 594 flow [2024-06-27 18:10:35,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=534, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=594, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-06-27 18:10:35,355 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-27 18:10:35,355 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 594 flow [2024-06-27 18:10:35,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:35,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:35,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:35,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 18:10:35,356 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:35,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1049442094, now seen corresponding path program 3 times [2024-06-27 18:10:35,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:35,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214636090] [2024-06-27 18:10:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:35,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:36,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:36,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214636090] [2024-06-27 18:10:36,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214636090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:36,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:36,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:10:36,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067727172] [2024-06-27 18:10:36,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:36,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:10:36,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:10:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:10:36,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:10:36,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 594 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:36,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:36,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:10:36,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:37,730 INFO L124 PetriNetUnfolderBase]: 5098/7505 cut-off events. [2024-06-27 18:10:37,730 INFO L125 PetriNetUnfolderBase]: For 49767/49776 co-relation queries the response was YES. [2024-06-27 18:10:37,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28203 conditions, 7505 events. 5098/7505 cut-off events. For 49767/49776 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 42742 event pairs, 1494 based on Foata normal form. 10/7508 useless extension candidates. Maximal degree in co-relation 28171. Up to 7051 conditions per place. [2024-06-27 18:10:37,797 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 87 selfloop transitions, 26 changer transitions 0/128 dead transitions. [2024-06-27 18:10:37,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 128 transitions, 906 flow [2024-06-27 18:10:37,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:10:37,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:10:37,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 18:10:37,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-06-27 18:10:37,799 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 594 flow. Second operand 7 states and 186 transitions. [2024-06-27 18:10:37,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 128 transitions, 906 flow [2024-06-27 18:10:37,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 128 transitions, 812 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 18:10:37,842 INFO L231 Difference]: Finished difference. Result has 92 places, 90 transitions, 560 flow [2024-06-27 18:10:37,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=560, PETRI_PLACES=92, PETRI_TRANSITIONS=90} [2024-06-27 18:10:37,843 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-27 18:10:37,843 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 90 transitions, 560 flow [2024-06-27 18:10:37,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:37,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:37,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:37,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 18:10:37,844 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:37,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:37,845 INFO L85 PathProgramCache]: Analyzing trace with hash -995989092, now seen corresponding path program 1 times [2024-06-27 18:10:37,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160580115] [2024-06-27 18:10:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160580115] [2024-06-27 18:10:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160580115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:38,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 18:10:38,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388461081] [2024-06-27 18:10:38,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:38,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 18:10:38,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 18:10:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 18:10:38,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-27 18:10:38,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 90 transitions, 560 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:38,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:38,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-27 18:10:38,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:39,690 INFO L124 PetriNetUnfolderBase]: 3872/6797 cut-off events. [2024-06-27 18:10:39,690 INFO L125 PetriNetUnfolderBase]: For 47482/47521 co-relation queries the response was YES. [2024-06-27 18:10:39,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23837 conditions, 6797 events. 3872/6797 cut-off events. For 47482/47521 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 48594 event pairs, 1689 based on Foata normal form. 8/6618 useless extension candidates. Maximal degree in co-relation 23804. Up to 5601 conditions per place. [2024-06-27 18:10:39,755 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 77 selfloop transitions, 9 changer transitions 0/111 dead transitions. [2024-06-27 18:10:39,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 111 transitions, 812 flow [2024-06-27 18:10:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 18:10:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 18:10:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-27 18:10:39,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544 [2024-06-27 18:10:39,757 INFO L175 Difference]: Start difference. First operand has 92 places, 90 transitions, 560 flow. Second operand 5 states and 136 transitions. [2024-06-27 18:10:39,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 111 transitions, 812 flow [2024-06-27 18:10:39,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 111 transitions, 733 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:10:39,785 INFO L231 Difference]: Finished difference. Result has 91 places, 97 transitions, 572 flow [2024-06-27 18:10:39,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=572, PETRI_PLACES=91, PETRI_TRANSITIONS=97} [2024-06-27 18:10:39,786 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 35 predicate places. [2024-06-27 18:10:39,786 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 97 transitions, 572 flow [2024-06-27 18:10:39,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:39,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:39,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:39,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 18:10:39,787 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:39,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash -701086591, now seen corresponding path program 1 times [2024-06-27 18:10:39,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:39,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238759572] [2024-06-27 18:10:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:40,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:40,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238759572] [2024-06-27 18:10:40,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238759572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:40,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:40,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:10:40,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509372317] [2024-06-27 18:10:40,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:40,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:10:40,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:40,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:10:40,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:10:40,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:40,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 97 transitions, 572 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:40,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:40,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:40,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:42,170 INFO L124 PetriNetUnfolderBase]: 5370/8555 cut-off events. [2024-06-27 18:10:42,170 INFO L125 PetriNetUnfolderBase]: For 60233/60236 co-relation queries the response was YES. [2024-06-27 18:10:42,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31647 conditions, 8555 events. 5370/8555 cut-off events. For 60233/60236 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 54121 event pairs, 1786 based on Foata normal form. 4/8293 useless extension candidates. Maximal degree in co-relation 31612. Up to 7426 conditions per place. [2024-06-27 18:10:42,253 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 110 selfloop transitions, 37 changer transitions 0/157 dead transitions. [2024-06-27 18:10:42,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 157 transitions, 1132 flow [2024-06-27 18:10:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:10:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:10:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:10:42,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-27 18:10:42,255 INFO L175 Difference]: Start difference. First operand has 91 places, 97 transitions, 572 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:10:42,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 157 transitions, 1132 flow [2024-06-27 18:10:42,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 157 transitions, 1107 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 18:10:42,292 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 703 flow [2024-06-27 18:10:42,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=703, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-27 18:10:42,293 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-27 18:10:42,293 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 703 flow [2024-06-27 18:10:42,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:42,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:42,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:42,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 18:10:42,294 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:42,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:42,294 INFO L85 PathProgramCache]: Analyzing trace with hash -701081011, now seen corresponding path program 2 times [2024-06-27 18:10:42,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:42,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781295071] [2024-06-27 18:10:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:42,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:43,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:43,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:43,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781295071] [2024-06-27 18:10:43,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781295071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:43,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:43,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:10:43,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614343185] [2024-06-27 18:10:43,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:43,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:10:43,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:43,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:10:43,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:10:43,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:43,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 703 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:43,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:43,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:43,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:44,767 INFO L124 PetriNetUnfolderBase]: 5393/8575 cut-off events. [2024-06-27 18:10:44,767 INFO L125 PetriNetUnfolderBase]: For 68775/68778 co-relation queries the response was YES. [2024-06-27 18:10:44,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33161 conditions, 8575 events. 5393/8575 cut-off events. For 68775/68778 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 54192 event pairs, 1785 based on Foata normal form. 4/8317 useless extension candidates. Maximal degree in co-relation 33124. Up to 7450 conditions per place. [2024-06-27 18:10:44,825 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 109 selfloop transitions, 38 changer transitions 0/157 dead transitions. [2024-06-27 18:10:44,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 157 transitions, 1231 flow [2024-06-27 18:10:44,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:10:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:10:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:10:44,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 18:10:44,829 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 703 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:10:44,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 157 transitions, 1231 flow [2024-06-27 18:10:44,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 157 transitions, 1146 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 18:10:44,864 INFO L231 Difference]: Finished difference. Result has 101 places, 106 transitions, 742 flow [2024-06-27 18:10:44,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=742, PETRI_PLACES=101, PETRI_TRANSITIONS=106} [2024-06-27 18:10:44,865 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-27 18:10:44,865 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 106 transitions, 742 flow [2024-06-27 18:10:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:44,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:44,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:44,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 18:10:44,866 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:44,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash -701080794, now seen corresponding path program 1 times [2024-06-27 18:10:44,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:44,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397542681] [2024-06-27 18:10:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:44,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:45,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:45,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:45,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397542681] [2024-06-27 18:10:45,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397542681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:45,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:45,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:10:45,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798656521] [2024-06-27 18:10:45,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:45,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:10:45,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:10:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:10:45,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:45,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 106 transitions, 742 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:45,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:45,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:45,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:47,165 INFO L124 PetriNetUnfolderBase]: 5439/8668 cut-off events. [2024-06-27 18:10:47,166 INFO L125 PetriNetUnfolderBase]: For 74486/74489 co-relation queries the response was YES. [2024-06-27 18:10:47,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33602 conditions, 8668 events. 5439/8668 cut-off events. For 74486/74489 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 54882 event pairs, 1624 based on Foata normal form. 4/8403 useless extension candidates. Maximal degree in co-relation 33563. Up to 7317 conditions per place. [2024-06-27 18:10:47,220 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 115 selfloop transitions, 42 changer transitions 0/167 dead transitions. [2024-06-27 18:10:47,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 167 transitions, 1334 flow [2024-06-27 18:10:47,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:10:47,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:10:47,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 18:10:47,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 18:10:47,222 INFO L175 Difference]: Start difference. First operand has 101 places, 106 transitions, 742 flow. Second operand 8 states and 215 transitions. [2024-06-27 18:10:47,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 167 transitions, 1334 flow [2024-06-27 18:10:47,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 167 transitions, 1259 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 18:10:47,260 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 837 flow [2024-06-27 18:10:47,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=837, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2024-06-27 18:10:47,260 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 48 predicate places. [2024-06-27 18:10:47,260 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 837 flow [2024-06-27 18:10:47,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:47,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:47,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 18:10:47,261 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:47,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1984065341, now seen corresponding path program 3 times [2024-06-27 18:10:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:47,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153724499] [2024-06-27 18:10:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:48,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:48,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153724499] [2024-06-27 18:10:48,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153724499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:48,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:48,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:10:48,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283361842] [2024-06-27 18:10:48,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:48,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:10:48,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:10:48,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:10:48,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:48,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 837 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:48,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:48,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:48,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:49,649 INFO L124 PetriNetUnfolderBase]: 5462/8686 cut-off events. [2024-06-27 18:10:49,649 INFO L125 PetriNetUnfolderBase]: For 83167/83170 co-relation queries the response was YES. [2024-06-27 18:10:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34975 conditions, 8686 events. 5462/8686 cut-off events. For 83167/83170 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 54973 event pairs, 1756 based on Foata normal form. 4/8423 useless extension candidates. Maximal degree in co-relation 34935. Up to 7538 conditions per place. [2024-06-27 18:10:49,701 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 113 selfloop transitions, 40 changer transitions 0/163 dead transitions. [2024-06-27 18:10:49,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 163 transitions, 1370 flow [2024-06-27 18:10:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:10:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:10:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 18:10:49,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:10:49,703 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 837 flow. Second operand 8 states and 208 transitions. [2024-06-27 18:10:49,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 163 transitions, 1370 flow [2024-06-27 18:10:49,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 163 transitions, 1299 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 18:10:49,747 INFO L231 Difference]: Finished difference. Result has 108 places, 115 transitions, 887 flow [2024-06-27 18:10:49,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=108, PETRI_TRANSITIONS=115} [2024-06-27 18:10:49,747 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-27 18:10:49,748 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 115 transitions, 887 flow [2024-06-27 18:10:49,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:49,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:49,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:49,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 18:10:49,748 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:49,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:49,749 INFO L85 PathProgramCache]: Analyzing trace with hash -695509164, now seen corresponding path program 2 times [2024-06-27 18:10:49,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:49,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913306981] [2024-06-27 18:10:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:49,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:50,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:50,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913306981] [2024-06-27 18:10:50,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913306981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:50,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:50,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:10:50,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940483764] [2024-06-27 18:10:50,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:50,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:10:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:50,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:10:50,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:10:50,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:50,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 115 transitions, 887 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:50,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:50,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:50,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:51,988 INFO L124 PetriNetUnfolderBase]: 5564/8851 cut-off events. [2024-06-27 18:10:51,988 INFO L125 PetriNetUnfolderBase]: For 90952/90955 co-relation queries the response was YES. [2024-06-27 18:10:52,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36145 conditions, 8851 events. 5564/8851 cut-off events. For 90952/90955 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 56043 event pairs, 1637 based on Foata normal form. 4/8584 useless extension candidates. Maximal degree in co-relation 36103. Up to 7435 conditions per place. [2024-06-27 18:10:52,060 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 119 selfloop transitions, 46 changer transitions 0/175 dead transitions. [2024-06-27 18:10:52,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 175 transitions, 1577 flow [2024-06-27 18:10:52,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:10:52,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:10:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 18:10:52,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 18:10:52,062 INFO L175 Difference]: Start difference. First operand has 108 places, 115 transitions, 887 flow. Second operand 8 states and 215 transitions. [2024-06-27 18:10:52,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 175 transitions, 1577 flow [2024-06-27 18:10:52,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 175 transitions, 1500 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 18:10:52,219 INFO L231 Difference]: Finished difference. Result has 111 places, 121 transitions, 982 flow [2024-06-27 18:10:52,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=810, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=982, PETRI_PLACES=111, PETRI_TRANSITIONS=121} [2024-06-27 18:10:52,219 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-27 18:10:52,219 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 121 transitions, 982 flow [2024-06-27 18:10:52,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:52,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:52,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:52,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 18:10:52,220 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:52,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:52,221 INFO L85 PathProgramCache]: Analyzing trace with hash -695516604, now seen corresponding path program 3 times [2024-06-27 18:10:52,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:52,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506956745] [2024-06-27 18:10:52,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:52,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:53,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:53,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506956745] [2024-06-27 18:10:53,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506956745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:53,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:53,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:10:53,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029107196] [2024-06-27 18:10:53,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:53,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:10:53,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:10:53,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:10:53,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:53,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 121 transitions, 982 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:53,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:53,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:53,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:54,748 INFO L124 PetriNetUnfolderBase]: 5554/8837 cut-off events. [2024-06-27 18:10:54,749 INFO L125 PetriNetUnfolderBase]: For 96947/96950 co-relation queries the response was YES. [2024-06-27 18:10:54,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36470 conditions, 8837 events. 5554/8837 cut-off events. For 96947/96950 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 56010 event pairs, 1635 based on Foata normal form. 4/8570 useless extension candidates. Maximal degree in co-relation 36427. Up to 7427 conditions per place. [2024-06-27 18:10:54,818 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 119 selfloop transitions, 45 changer transitions 0/174 dead transitions. [2024-06-27 18:10:54,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 174 transitions, 1522 flow [2024-06-27 18:10:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:10:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:10:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 18:10:54,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 18:10:54,819 INFO L175 Difference]: Start difference. First operand has 111 places, 121 transitions, 982 flow. Second operand 8 states and 215 transitions. [2024-06-27 18:10:54,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 174 transitions, 1522 flow [2024-06-27 18:10:54,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 174 transitions, 1417 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 18:10:54,902 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 975 flow [2024-06-27 18:10:54,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=975, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2024-06-27 18:10:54,902 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 59 predicate places. [2024-06-27 18:10:54,903 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 975 flow [2024-06-27 18:10:54,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:54,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:54,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:54,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 18:10:54,903 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:54,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:54,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1380509686, now seen corresponding path program 4 times [2024-06-27 18:10:54,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:54,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377147125] [2024-06-27 18:10:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:54,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:55,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:55,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377147125] [2024-06-27 18:10:55,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377147125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:55,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:55,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:10:55,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951055023] [2024-06-27 18:10:55,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:55,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:10:55,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:55,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:10:55,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:10:56,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:56,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:56,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:56,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:56,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:10:57,526 INFO L124 PetriNetUnfolderBase]: 5656/8326 cut-off events. [2024-06-27 18:10:57,527 INFO L125 PetriNetUnfolderBase]: For 105732/105744 co-relation queries the response was YES. [2024-06-27 18:10:57,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36821 conditions, 8326 events. 5656/8326 cut-off events. For 105732/105744 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 47690 event pairs, 1420 based on Foata normal form. 9/8285 useless extension candidates. Maximal degree in co-relation 36777. Up to 7513 conditions per place. [2024-06-27 18:10:57,593 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 117 selfloop transitions, 51 changer transitions 0/178 dead transitions. [2024-06-27 18:10:57,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 178 transitions, 1697 flow [2024-06-27 18:10:57,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:10:57,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:10:57,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 18:10:57,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5325 [2024-06-27 18:10:57,595 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 975 flow. Second operand 8 states and 213 transitions. [2024-06-27 18:10:57,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 178 transitions, 1697 flow [2024-06-27 18:10:57,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 178 transitions, 1587 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 18:10:57,674 INFO L231 Difference]: Finished difference. Result has 116 places, 127 transitions, 1065 flow [2024-06-27 18:10:57,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1065, PETRI_PLACES=116, PETRI_TRANSITIONS=127} [2024-06-27 18:10:57,675 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 60 predicate places. [2024-06-27 18:10:57,675 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 127 transitions, 1065 flow [2024-06-27 18:10:57,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:57,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:10:57,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:10:57,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 18:10:57,676 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:10:57,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:10:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1964015036, now seen corresponding path program 5 times [2024-06-27 18:10:57,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:10:57,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005017999] [2024-06-27 18:10:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:10:57,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:10:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:10:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:10:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:10:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005017999] [2024-06-27 18:10:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005017999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:10:58,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:10:58,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:10:58,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924640007] [2024-06-27 18:10:58,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:10:58,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:10:58,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:10:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:10:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:10:58,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:10:58,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 127 transitions, 1065 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:10:58,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:10:58,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:10:58,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:00,134 INFO L124 PetriNetUnfolderBase]: 5646/8312 cut-off events. [2024-06-27 18:11:00,136 INFO L125 PetriNetUnfolderBase]: For 111265/111277 co-relation queries the response was YES. [2024-06-27 18:11:00,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36989 conditions, 8312 events. 5646/8312 cut-off events. For 111265/111277 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 47706 event pairs, 1418 based on Foata normal form. 9/8271 useless extension candidates. Maximal degree in co-relation 36944. Up to 7505 conditions per place. [2024-06-27 18:11:00,215 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 114 selfloop transitions, 52 changer transitions 0/176 dead transitions. [2024-06-27 18:11:00,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 176 transitions, 1607 flow [2024-06-27 18:11:00,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:11:00,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:11:00,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:11:00,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 18:11:00,217 INFO L175 Difference]: Start difference. First operand has 116 places, 127 transitions, 1065 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:11:00,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 176 transitions, 1607 flow [2024-06-27 18:11:00,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 176 transitions, 1456 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 18:11:00,333 INFO L231 Difference]: Finished difference. Result has 119 places, 127 transitions, 1026 flow [2024-06-27 18:11:00,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=914, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1026, PETRI_PLACES=119, PETRI_TRANSITIONS=127} [2024-06-27 18:11:00,334 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-27 18:11:00,334 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 127 transitions, 1026 flow [2024-06-27 18:11:00,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:00,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:00,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:00,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 18:11:00,335 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:00,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:00,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1954810826, now seen corresponding path program 6 times [2024-06-27 18:11:00,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:00,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302440397] [2024-06-27 18:11:00,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:00,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:01,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:01,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302440397] [2024-06-27 18:11:01,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302440397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:01,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:01,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:11:01,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341841881] [2024-06-27 18:11:01,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:11:01,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:11:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:11:01,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:01,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 127 transitions, 1026 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:01,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:01,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:01,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:02,893 INFO L124 PetriNetUnfolderBase]: 5636/8321 cut-off events. [2024-06-27 18:11:02,894 INFO L125 PetriNetUnfolderBase]: For 115489/115501 co-relation queries the response was YES. [2024-06-27 18:11:02,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36929 conditions, 8321 events. 5636/8321 cut-off events. For 115489/115501 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 48002 event pairs, 1432 based on Foata normal form. 9/8272 useless extension candidates. Maximal degree in co-relation 36883. Up to 7497 conditions per place. [2024-06-27 18:11:02,983 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 109 selfloop transitions, 54 changer transitions 0/173 dead transitions. [2024-06-27 18:11:02,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 173 transitions, 1466 flow [2024-06-27 18:11:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:11:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:11:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:11:02,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-06-27 18:11:02,985 INFO L175 Difference]: Start difference. First operand has 119 places, 127 transitions, 1026 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:11:02,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 173 transitions, 1466 flow [2024-06-27 18:11:03,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1324 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 18:11:03,134 INFO L231 Difference]: Finished difference. Result has 120 places, 127 transitions, 1000 flow [2024-06-27 18:11:03,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1000, PETRI_PLACES=120, PETRI_TRANSITIONS=127} [2024-06-27 18:11:03,135 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-27 18:11:03,135 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 127 transitions, 1000 flow [2024-06-27 18:11:03,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:03,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:03,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:03,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 18:11:03,136 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:03,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1964015253, now seen corresponding path program 4 times [2024-06-27 18:11:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:03,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477678562] [2024-06-27 18:11:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:03,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:04,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:04,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477678562] [2024-06-27 18:11:04,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477678562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:04,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:04,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:11:04,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386080184] [2024-06-27 18:11:04,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:04,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:11:04,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:04,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:11:04,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:11:04,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:04,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 127 transitions, 1000 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:04,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:04,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:04,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:05,630 INFO L124 PetriNetUnfolderBase]: 5631/8321 cut-off events. [2024-06-27 18:11:05,630 INFO L125 PetriNetUnfolderBase]: For 120740/120749 co-relation queries the response was YES. [2024-06-27 18:11:05,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37050 conditions, 8321 events. 5631/8321 cut-off events. For 120740/120749 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 48041 event pairs, 1590 based on Foata normal form. 5/8265 useless extension candidates. Maximal degree in co-relation 37003. Up to 7775 conditions per place. [2024-06-27 18:11:05,718 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 120 selfloop transitions, 40 changer transitions 0/170 dead transitions. [2024-06-27 18:11:05,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1428 flow [2024-06-27 18:11:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:11:05,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:11:05,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 18:11:05,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075 [2024-06-27 18:11:05,720 INFO L175 Difference]: Start difference. First operand has 120 places, 127 transitions, 1000 flow. Second operand 8 states and 203 transitions. [2024-06-27 18:11:05,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1428 flow [2024-06-27 18:11:05,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 170 transitions, 1280 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 18:11:05,837 INFO L231 Difference]: Finished difference. Result has 120 places, 127 transitions, 940 flow [2024-06-27 18:11:05,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=852, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=940, PETRI_PLACES=120, PETRI_TRANSITIONS=127} [2024-06-27 18:11:05,838 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-27 18:11:05,838 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 127 transitions, 940 flow [2024-06-27 18:11:05,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:05,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:05,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:05,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 18:11:05,839 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:05,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:05,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1954472213, now seen corresponding path program 1 times [2024-06-27 18:11:05,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:05,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817420386] [2024-06-27 18:11:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:05,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:07,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:07,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817420386] [2024-06-27 18:11:07,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817420386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:07,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:07,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:11:07,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913457433] [2024-06-27 18:11:07,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:07,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:11:07,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:07,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:11:07,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:11:07,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:11:07,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 127 transitions, 940 flow. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:07,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:07,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:11:07,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:08,520 INFO L124 PetriNetUnfolderBase]: 4613/7508 cut-off events. [2024-06-27 18:11:08,521 INFO L125 PetriNetUnfolderBase]: For 109863/109865 co-relation queries the response was YES. [2024-06-27 18:11:08,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31606 conditions, 7508 events. 4613/7508 cut-off events. For 109863/109865 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 49327 event pairs, 1676 based on Foata normal form. 6/7389 useless extension candidates. Maximal degree in co-relation 31558. Up to 6460 conditions per place. [2024-06-27 18:11:08,584 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 134 selfloop transitions, 19 changer transitions 0/175 dead transitions. [2024-06-27 18:11:08,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 175 transitions, 1402 flow [2024-06-27 18:11:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:11:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:11:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 18:11:08,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-27 18:11:08,586 INFO L175 Difference]: Start difference. First operand has 120 places, 127 transitions, 940 flow. Second operand 8 states and 211 transitions. [2024-06-27 18:11:08,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 175 transitions, 1402 flow [2024-06-27 18:11:08,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 175 transitions, 1267 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 18:11:08,654 INFO L231 Difference]: Finished difference. Result has 119 places, 132 transitions, 910 flow [2024-06-27 18:11:08,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=910, PETRI_PLACES=119, PETRI_TRANSITIONS=132} [2024-06-27 18:11:08,655 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-27 18:11:08,655 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 132 transitions, 910 flow [2024-06-27 18:11:08,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:08,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:08,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:08,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 18:11:08,656 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:08,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:08,656 INFO L85 PathProgramCache]: Analyzing trace with hash -810889508, now seen corresponding path program 1 times [2024-06-27 18:11:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:08,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357652911] [2024-06-27 18:11:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:09,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:09,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:09,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357652911] [2024-06-27 18:11:09,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357652911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:09,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:09,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:11:09,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094388661] [2024-06-27 18:11:09,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:09,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:11:09,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:09,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:11:09,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:11:10,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-27 18:11:10,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 132 transitions, 910 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:10,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:10,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-27 18:11:10,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:11,130 INFO L124 PetriNetUnfolderBase]: 4085/6967 cut-off events. [2024-06-27 18:11:11,130 INFO L125 PetriNetUnfolderBase]: For 113917/113973 co-relation queries the response was YES. [2024-06-27 18:11:11,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29897 conditions, 6967 events. 4085/6967 cut-off events. For 113917/113973 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 48026 event pairs, 1617 based on Foata normal form. 15/6848 useless extension candidates. Maximal degree in co-relation 29848. Up to 5751 conditions per place. [2024-06-27 18:11:11,195 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 103 selfloop transitions, 12 changer transitions 0/154 dead transitions. [2024-06-27 18:11:11,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 154 transitions, 1214 flow [2024-06-27 18:11:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:11:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:11:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 18:11:11,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-27 18:11:11,197 INFO L175 Difference]: Start difference. First operand has 119 places, 132 transitions, 910 flow. Second operand 6 states and 161 transitions. [2024-06-27 18:11:11,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 154 transitions, 1214 flow [2024-06-27 18:11:11,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 154 transitions, 1149 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 18:11:11,319 INFO L231 Difference]: Finished difference. Result has 120 places, 135 transitions, 909 flow [2024-06-27 18:11:11,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=909, PETRI_PLACES=120, PETRI_TRANSITIONS=135} [2024-06-27 18:11:11,322 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 64 predicate places. [2024-06-27 18:11:11,322 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 135 transitions, 909 flow [2024-06-27 18:11:11,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:11,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:11,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:11,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 18:11:11,323 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:11,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:11,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1312781991, now seen corresponding path program 1 times [2024-06-27 18:11:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:11,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507130710] [2024-06-27 18:11:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:11,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:12,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:12,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507130710] [2024-06-27 18:11:12,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507130710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:12,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:12,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:12,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22854009] [2024-06-27 18:11:12,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:12,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:12,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:12,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:12,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 135 transitions, 909 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:12,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:12,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:12,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:14,142 INFO L124 PetriNetUnfolderBase]: 5650/9119 cut-off events. [2024-06-27 18:11:14,143 INFO L125 PetriNetUnfolderBase]: For 143412/143412 co-relation queries the response was YES. [2024-06-27 18:11:14,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39519 conditions, 9119 events. 5650/9119 cut-off events. For 143412/143412 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 58836 event pairs, 1733 based on Foata normal form. 2/8813 useless extension candidates. Maximal degree in co-relation 39469. Up to 7931 conditions per place. [2024-06-27 18:11:14,242 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 167 selfloop transitions, 23 changer transitions 0/200 dead transitions. [2024-06-27 18:11:14,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 200 transitions, 1487 flow [2024-06-27 18:11:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:14,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:11:14,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-06-27 18:11:14,244 INFO L175 Difference]: Start difference. First operand has 120 places, 135 transitions, 909 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:11:14,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 200 transitions, 1487 flow [2024-06-27 18:11:14,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 200 transitions, 1445 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 18:11:14,396 INFO L231 Difference]: Finished difference. Result has 125 places, 138 transitions, 969 flow [2024-06-27 18:11:14,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=969, PETRI_PLACES=125, PETRI_TRANSITIONS=138} [2024-06-27 18:11:14,397 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 69 predicate places. [2024-06-27 18:11:14,397 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 138 transitions, 969 flow [2024-06-27 18:11:14,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:14,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:14,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:14,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 18:11:14,398 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:14,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:14,399 INFO L85 PathProgramCache]: Analyzing trace with hash -263314867, now seen corresponding path program 1 times [2024-06-27 18:11:14,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:14,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840800358] [2024-06-27 18:11:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:14,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:15,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:15,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840800358] [2024-06-27 18:11:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840800358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:15,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:15,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:15,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440701519] [2024-06-27 18:11:15,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:15,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:15,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:15,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:15,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 138 transitions, 969 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:15,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:15,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:15,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:17,323 INFO L124 PetriNetUnfolderBase]: 5696/9021 cut-off events. [2024-06-27 18:11:17,324 INFO L125 PetriNetUnfolderBase]: For 155799/155802 co-relation queries the response was YES. [2024-06-27 18:11:17,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40791 conditions, 9021 events. 5696/9021 cut-off events. For 155799/155802 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 56740 event pairs, 1458 based on Foata normal form. 4/8761 useless extension candidates. Maximal degree in co-relation 40740. Up to 7289 conditions per place. [2024-06-27 18:11:17,421 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 128 selfloop transitions, 72 changer transitions 0/210 dead transitions. [2024-06-27 18:11:17,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 210 transitions, 1737 flow [2024-06-27 18:11:17,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 18:11:17,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 18:11:17,423 INFO L175 Difference]: Start difference. First operand has 125 places, 138 transitions, 969 flow. Second operand 9 states and 245 transitions. [2024-06-27 18:11:17,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 210 transitions, 1737 flow [2024-06-27 18:11:17,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 210 transitions, 1659 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 18:11:17,597 INFO L231 Difference]: Finished difference. Result has 127 places, 144 transitions, 1133 flow [2024-06-27 18:11:17,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1133, PETRI_PLACES=127, PETRI_TRANSITIONS=144} [2024-06-27 18:11:17,598 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 71 predicate places. [2024-06-27 18:11:17,598 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 144 transitions, 1133 flow [2024-06-27 18:11:17,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:17,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:17,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:17,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 18:11:17,599 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:17,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:17,599 INFO L85 PathProgramCache]: Analyzing trace with hash -92612623, now seen corresponding path program 2 times [2024-06-27 18:11:17,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:17,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534989910] [2024-06-27 18:11:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:17,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:18,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:18,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534989910] [2024-06-27 18:11:18,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534989910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:18,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:18,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:18,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301995727] [2024-06-27 18:11:18,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:18,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:18,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:18,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:18,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:18,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:18,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 144 transitions, 1133 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:18,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:18,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:18,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:20,390 INFO L124 PetriNetUnfolderBase]: 5719/8726 cut-off events. [2024-06-27 18:11:20,390 INFO L125 PetriNetUnfolderBase]: For 167636/167639 co-relation queries the response was YES. [2024-06-27 18:11:20,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42210 conditions, 8726 events. 5719/8726 cut-off events. For 167636/167639 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 52917 event pairs, 1606 based on Foata normal form. 4/8576 useless extension candidates. Maximal degree in co-relation 42158. Up to 7803 conditions per place. [2024-06-27 18:11:20,490 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 151 selfloop transitions, 51 changer transitions 0/212 dead transitions. [2024-06-27 18:11:20,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 212 transitions, 1909 flow [2024-06-27 18:11:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:11:20,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-06-27 18:11:20,493 INFO L175 Difference]: Start difference. First operand has 127 places, 144 transitions, 1133 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:11:20,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 212 transitions, 1909 flow [2024-06-27 18:11:20,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 212 transitions, 1791 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 18:11:20,718 INFO L231 Difference]: Finished difference. Result has 131 places, 150 transitions, 1231 flow [2024-06-27 18:11:20,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1231, PETRI_PLACES=131, PETRI_TRANSITIONS=150} [2024-06-27 18:11:20,720 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 75 predicate places. [2024-06-27 18:11:20,720 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 150 transitions, 1231 flow [2024-06-27 18:11:20,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:20,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:20,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:20,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 18:11:20,721 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:20,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:20,722 INFO L85 PathProgramCache]: Analyzing trace with hash -92432947, now seen corresponding path program 2 times [2024-06-27 18:11:20,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:20,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79325048] [2024-06-27 18:11:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:20,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:21,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:21,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79325048] [2024-06-27 18:11:21,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79325048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:21,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:21,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:21,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675435812] [2024-06-27 18:11:21,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:21,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:21,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:21,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:21,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 150 transitions, 1231 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:21,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:21,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:21,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:23,613 INFO L124 PetriNetUnfolderBase]: 5821/8855 cut-off events. [2024-06-27 18:11:23,614 INFO L125 PetriNetUnfolderBase]: For 183475/183478 co-relation queries the response was YES. [2024-06-27 18:11:23,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44075 conditions, 8855 events. 5821/8855 cut-off events. For 183475/183478 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 53491 event pairs, 1460 based on Foata normal form. 4/8714 useless extension candidates. Maximal degree in co-relation 44021. Up to 7407 conditions per place. [2024-06-27 18:11:23,699 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 139 selfloop transitions, 72 changer transitions 0/221 dead transitions. [2024-06-27 18:11:23,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 221 transitions, 2133 flow [2024-06-27 18:11:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 18:11:23,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 18:11:23,702 INFO L175 Difference]: Start difference. First operand has 131 places, 150 transitions, 1231 flow. Second operand 9 states and 245 transitions. [2024-06-27 18:11:23,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 221 transitions, 2133 flow [2024-06-27 18:11:23,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 221 transitions, 2034 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 18:11:23,889 INFO L231 Difference]: Finished difference. Result has 135 places, 156 transitions, 1356 flow [2024-06-27 18:11:23,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1356, PETRI_PLACES=135, PETRI_TRANSITIONS=156} [2024-06-27 18:11:23,890 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-27 18:11:23,890 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 156 transitions, 1356 flow [2024-06-27 18:11:23,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:23,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:23,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:23,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 18:11:23,891 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:23,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash -258673423, now seen corresponding path program 3 times [2024-06-27 18:11:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:23,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560604110] [2024-06-27 18:11:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:24,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:24,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560604110] [2024-06-27 18:11:24,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560604110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:24,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:24,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:24,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608183878] [2024-06-27 18:11:24,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:24,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:24,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:24,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 156 transitions, 1356 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:24,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:24,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:24,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:26,403 INFO L124 PetriNetUnfolderBase]: 5844/8939 cut-off events. [2024-06-27 18:11:26,404 INFO L125 PetriNetUnfolderBase]: For 192059/192062 co-relation queries the response was YES. [2024-06-27 18:11:26,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45097 conditions, 8939 events. 5844/8939 cut-off events. For 192059/192062 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 54517 event pairs, 1624 based on Foata normal form. 4/8781 useless extension candidates. Maximal degree in co-relation 45041. Up to 7969 conditions per place. [2024-06-27 18:11:26,485 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 156 selfloop transitions, 52 changer transitions 0/218 dead transitions. [2024-06-27 18:11:26,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 218 transitions, 2088 flow [2024-06-27 18:11:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:11:26,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244444444444445 [2024-06-27 18:11:26,487 INFO L175 Difference]: Start difference. First operand has 135 places, 156 transitions, 1356 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:11:26,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 218 transitions, 2088 flow [2024-06-27 18:11:26,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 218 transitions, 1962 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:11:26,689 INFO L231 Difference]: Finished difference. Result has 139 places, 159 transitions, 1386 flow [2024-06-27 18:11:26,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1386, PETRI_PLACES=139, PETRI_TRANSITIONS=159} [2024-06-27 18:11:26,690 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 83 predicate places. [2024-06-27 18:11:26,690 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 159 transitions, 1386 flow [2024-06-27 18:11:26,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:26,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:26,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:26,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 18:11:26,690 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:26,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:26,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1308020205, now seen corresponding path program 3 times [2024-06-27 18:11:26,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:26,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633828045] [2024-06-27 18:11:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:26,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:27,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:27,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:27,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633828045] [2024-06-27 18:11:27,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633828045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:27,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:27,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:27,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483745520] [2024-06-27 18:11:27,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:27,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:27,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:27,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:27,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:27,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:27,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 1386 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:27,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:27,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:27,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:29,770 INFO L124 PetriNetUnfolderBase]: 5834/8881 cut-off events. [2024-06-27 18:11:29,771 INFO L125 PetriNetUnfolderBase]: For 199856/199859 co-relation queries the response was YES. [2024-06-27 18:11:29,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44826 conditions, 8881 events. 5834/8881 cut-off events. For 199856/199859 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 53676 event pairs, 1458 based on Foata normal form. 4/8739 useless extension candidates. Maximal degree in co-relation 44769. Up to 7431 conditions per place. [2024-06-27 18:11:29,875 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 142 selfloop transitions, 71 changer transitions 0/223 dead transitions. [2024-06-27 18:11:29,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 223 transitions, 2108 flow [2024-06-27 18:11:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:29,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 18:11:29,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 18:11:29,878 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 1386 flow. Second operand 9 states and 245 transitions. [2024-06-27 18:11:29,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 223 transitions, 2108 flow [2024-06-27 18:11:30,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 223 transitions, 1977 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 18:11:30,129 INFO L231 Difference]: Finished difference. Result has 142 places, 159 transitions, 1405 flow [2024-06-27 18:11:30,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1405, PETRI_PLACES=142, PETRI_TRANSITIONS=159} [2024-06-27 18:11:30,129 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-27 18:11:30,129 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 159 transitions, 1405 flow [2024-06-27 18:11:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:30,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:30,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:30,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 18:11:30,133 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:30,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:30,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1376722201, now seen corresponding path program 4 times [2024-06-27 18:11:30,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:30,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667707682] [2024-06-27 18:11:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:31,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:31,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667707682] [2024-06-27 18:11:31,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667707682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:31,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:31,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:31,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075752663] [2024-06-27 18:11:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:31,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:31,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:31,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:31,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 1405 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:31,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:31,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:31,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:32,840 INFO L124 PetriNetUnfolderBase]: 5936/9068 cut-off events. [2024-06-27 18:11:32,841 INFO L125 PetriNetUnfolderBase]: For 214265/214268 co-relation queries the response was YES. [2024-06-27 18:11:32,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46251 conditions, 9068 events. 5936/9068 cut-off events. For 214265/214268 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 55270 event pairs, 1496 based on Foata normal form. 4/8917 useless extension candidates. Maximal degree in co-relation 46193. Up to 7517 conditions per place. [2024-06-27 18:11:32,945 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 140 selfloop transitions, 77 changer transitions 0/227 dead transitions. [2024-06-27 18:11:32,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 227 transitions, 2353 flow [2024-06-27 18:11:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-27 18:11:32,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 18:11:32,948 INFO L175 Difference]: Start difference. First operand has 142 places, 159 transitions, 1405 flow. Second operand 9 states and 243 transitions. [2024-06-27 18:11:32,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 227 transitions, 2353 flow [2024-06-27 18:11:33,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 227 transitions, 2191 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 18:11:33,141 INFO L231 Difference]: Finished difference. Result has 143 places, 165 transitions, 1495 flow [2024-06-27 18:11:33,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1495, PETRI_PLACES=143, PETRI_TRANSITIONS=165} [2024-06-27 18:11:33,141 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 87 predicate places. [2024-06-27 18:11:33,141 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 165 transitions, 1495 flow [2024-06-27 18:11:33,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:33,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:33,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:33,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 18:11:33,142 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:33,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:33,143 INFO L85 PathProgramCache]: Analyzing trace with hash -86183533, now seen corresponding path program 4 times [2024-06-27 18:11:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180383150] [2024-06-27 18:11:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:34,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:34,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180383150] [2024-06-27 18:11:34,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180383150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:34,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:34,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:34,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116263275] [2024-06-27 18:11:34,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:34,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:34,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:34,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:34,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:34,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 165 transitions, 1495 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:34,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:34,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:34,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:36,000 INFO L124 PetriNetUnfolderBase]: 5959/9130 cut-off events. [2024-06-27 18:11:36,000 INFO L125 PetriNetUnfolderBase]: For 223731/223734 co-relation queries the response was YES. [2024-06-27 18:11:36,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46783 conditions, 9130 events. 5959/9130 cut-off events. For 223731/223734 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 55930 event pairs, 1631 based on Foata normal form. 4/8971 useless extension candidates. Maximal degree in co-relation 46724. Up to 8121 conditions per place. [2024-06-27 18:11:36,106 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 160 selfloop transitions, 54 changer transitions 0/224 dead transitions. [2024-06-27 18:11:36,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 224 transitions, 2246 flow [2024-06-27 18:11:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:11:36,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:11:36,109 INFO L175 Difference]: Start difference. First operand has 143 places, 165 transitions, 1495 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:11:36,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 224 transitions, 2246 flow [2024-06-27 18:11:36,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 224 transitions, 2122 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 18:11:36,350 INFO L231 Difference]: Finished difference. Result has 147 places, 168 transitions, 1534 flow [2024-06-27 18:11:36,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1534, PETRI_PLACES=147, PETRI_TRANSITIONS=168} [2024-06-27 18:11:36,351 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 91 predicate places. [2024-06-27 18:11:36,351 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 168 transitions, 1534 flow [2024-06-27 18:11:36,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:36,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:36,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 18:11:36,352 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:36,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:36,353 INFO L85 PathProgramCache]: Analyzing trace with hash -86183347, now seen corresponding path program 5 times [2024-06-27 18:11:36,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:36,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162673857] [2024-06-27 18:11:36,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:36,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:37,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:37,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162673857] [2024-06-27 18:11:37,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162673857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:37,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:37,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:37,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530260844] [2024-06-27 18:11:37,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:37,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:37,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:37,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:37,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 168 transitions, 1534 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:37,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:37,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:37,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:39,107 INFO L124 PetriNetUnfolderBase]: 6005/9182 cut-off events. [2024-06-27 18:11:39,107 INFO L125 PetriNetUnfolderBase]: For 235700/235703 co-relation queries the response was YES. [2024-06-27 18:11:39,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46975 conditions, 9182 events. 6005/9182 cut-off events. For 235700/235703 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 56000 event pairs, 1505 based on Foata normal form. 4/9030 useless extension candidates. Maximal degree in co-relation 46915. Up to 7588 conditions per place. [2024-06-27 18:11:39,177 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 146 selfloop transitions, 78 changer transitions 0/234 dead transitions. [2024-06-27 18:11:39,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 234 transitions, 2464 flow [2024-06-27 18:11:39,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-27 18:11:39,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-27 18:11:39,203 INFO L175 Difference]: Start difference. First operand has 147 places, 168 transitions, 1534 flow. Second operand 9 states and 245 transitions. [2024-06-27 18:11:39,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 234 transitions, 2464 flow [2024-06-27 18:11:39,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 234 transitions, 2349 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 18:11:39,435 INFO L231 Difference]: Finished difference. Result has 150 places, 171 transitions, 1621 flow [2024-06-27 18:11:39,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1621, PETRI_PLACES=150, PETRI_TRANSITIONS=171} [2024-06-27 18:11:39,435 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-27 18:11:39,435 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 171 transitions, 1621 flow [2024-06-27 18:11:39,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:39,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:39,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:39,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 18:11:39,436 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:39,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 576486985, now seen corresponding path program 6 times [2024-06-27 18:11:39,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:39,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642163228] [2024-06-27 18:11:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:39,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:40,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:40,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642163228] [2024-06-27 18:11:40,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642163228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:40,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:40,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497092799] [2024-06-27 18:11:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:40,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:40,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:40,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:40,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:40,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:40,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 171 transitions, 1621 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:40,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:40,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:40,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:42,069 INFO L124 PetriNetUnfolderBase]: 5995/9161 cut-off events. [2024-06-27 18:11:42,070 INFO L125 PetriNetUnfolderBase]: For 244784/244787 co-relation queries the response was YES. [2024-06-27 18:11:42,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47393 conditions, 9161 events. 5995/9161 cut-off events. For 244784/244787 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 55778 event pairs, 1494 based on Foata normal form. 4/9009 useless extension candidates. Maximal degree in co-relation 47332. Up to 7580 conditions per place. [2024-06-27 18:11:42,158 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 145 selfloop transitions, 77 changer transitions 0/232 dead transitions. [2024-06-27 18:11:42,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 232 transitions, 2369 flow [2024-06-27 18:11:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-27 18:11:42,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422222222222223 [2024-06-27 18:11:42,160 INFO L175 Difference]: Start difference. First operand has 150 places, 171 transitions, 1621 flow. Second operand 9 states and 244 transitions. [2024-06-27 18:11:42,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 232 transitions, 2369 flow [2024-06-27 18:11:42,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 232 transitions, 2189 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 18:11:42,384 INFO L231 Difference]: Finished difference. Result has 153 places, 171 transitions, 1603 flow [2024-06-27 18:11:42,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1441, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1603, PETRI_PLACES=153, PETRI_TRANSITIONS=171} [2024-06-27 18:11:42,386 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-27 18:11:42,386 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 171 transitions, 1603 flow [2024-06-27 18:11:42,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:42,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:42,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:42,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 18:11:42,387 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:42,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:42,400 INFO L85 PathProgramCache]: Analyzing trace with hash 617897915, now seen corresponding path program 1 times [2024-06-27 18:11:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:42,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875800417] [2024-06-27 18:11:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:43,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:43,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875800417] [2024-06-27 18:11:43,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875800417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:43,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:43,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:11:43,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048474971] [2024-06-27 18:11:43,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:43,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:11:43,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:43,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:11:43,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:11:43,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:11:43,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 171 transitions, 1603 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:43,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:43,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:11:43,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:44,591 INFO L124 PetriNetUnfolderBase]: 4939/8157 cut-off events. [2024-06-27 18:11:44,591 INFO L125 PetriNetUnfolderBase]: For 248595/248683 co-relation queries the response was YES. [2024-06-27 18:11:44,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41680 conditions, 8157 events. 4939/8157 cut-off events. For 248595/248683 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 55497 event pairs, 1848 based on Foata normal form. 21/7987 useless extension candidates. Maximal degree in co-relation 41618. Up to 6920 conditions per place. [2024-06-27 18:11:44,703 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 138 selfloop transitions, 13 changer transitions 0/201 dead transitions. [2024-06-27 18:11:44,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 201 transitions, 2028 flow [2024-06-27 18:11:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:11:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:11:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 18:11:44,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-27 18:11:44,705 INFO L175 Difference]: Start difference. First operand has 153 places, 171 transitions, 1603 flow. Second operand 6 states and 161 transitions. [2024-06-27 18:11:44,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 201 transitions, 2028 flow [2024-06-27 18:11:45,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 201 transitions, 1834 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 18:11:45,019 INFO L231 Difference]: Finished difference. Result has 151 places, 178 transitions, 1527 flow [2024-06-27 18:11:45,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1527, PETRI_PLACES=151, PETRI_TRANSITIONS=178} [2024-06-27 18:11:45,020 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 95 predicate places. [2024-06-27 18:11:45,020 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 178 transitions, 1527 flow [2024-06-27 18:11:45,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:45,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:45,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:45,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 18:11:45,021 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:45,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:45,021 INFO L85 PathProgramCache]: Analyzing trace with hash -469592055, now seen corresponding path program 7 times [2024-06-27 18:11:45,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:45,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20353333] [2024-06-27 18:11:45,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:45,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:46,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:46,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:46,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20353333] [2024-06-27 18:11:46,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20353333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:46,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:46,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:46,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130101854] [2024-06-27 18:11:46,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:46,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:46,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:46,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:46,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:46,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:46,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 178 transitions, 1527 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:46,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:46,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:46,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:47,883 INFO L124 PetriNetUnfolderBase]: 6058/9372 cut-off events. [2024-06-27 18:11:47,883 INFO L125 PetriNetUnfolderBase]: For 267124/267136 co-relation queries the response was YES. [2024-06-27 18:11:47,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48818 conditions, 9372 events. 6058/9372 cut-off events. For 267124/267136 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 58616 event pairs, 1711 based on Foata normal form. 8/9190 useless extension candidates. Maximal degree in co-relation 48754. Up to 7642 conditions per place. [2024-06-27 18:11:47,987 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 140 selfloop transitions, 88 changer transitions 0/238 dead transitions. [2024-06-27 18:11:47,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 238 transitions, 2335 flow [2024-06-27 18:11:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:11:47,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244444444444445 [2024-06-27 18:11:47,988 INFO L175 Difference]: Start difference. First operand has 151 places, 178 transitions, 1527 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:11:47,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 238 transitions, 2335 flow [2024-06-27 18:11:48,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 238 transitions, 2294 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 18:11:48,249 INFO L231 Difference]: Finished difference. Result has 157 places, 181 transitions, 1712 flow [2024-06-27 18:11:48,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1712, PETRI_PLACES=157, PETRI_TRANSITIONS=181} [2024-06-27 18:11:48,250 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 101 predicate places. [2024-06-27 18:11:48,251 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 181 transitions, 1712 flow [2024-06-27 18:11:48,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:48,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:48,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:48,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 18:11:48,251 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:48,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash 803275649, now seen corresponding path program 8 times [2024-06-27 18:11:48,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:48,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104941394] [2024-06-27 18:11:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104941394] [2024-06-27 18:11:49,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104941394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:49,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:49,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:49,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218171059] [2024-06-27 18:11:49,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:49,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:49,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:49,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:49,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:49,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 181 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:49,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:49,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:49,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:51,061 INFO L124 PetriNetUnfolderBase]: 6160/9504 cut-off events. [2024-06-27 18:11:51,062 INFO L125 PetriNetUnfolderBase]: For 286041/286053 co-relation queries the response was YES. [2024-06-27 18:11:51,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50836 conditions, 9504 events. 6160/9504 cut-off events. For 286041/286053 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 59023 event pairs, 1710 based on Foata normal form. 8/9333 useless extension candidates. Maximal degree in co-relation 50771. Up to 7728 conditions per place. [2024-06-27 18:11:51,145 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 148 selfloop transitions, 89 changer transitions 0/247 dead transitions. [2024-06-27 18:11:51,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 247 transitions, 2758 flow [2024-06-27 18:11:51,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:51,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 18:11:51,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355555555555556 [2024-06-27 18:11:51,147 INFO L175 Difference]: Start difference. First operand has 157 places, 181 transitions, 1712 flow. Second operand 9 states and 241 transitions. [2024-06-27 18:11:51,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 247 transitions, 2758 flow [2024-06-27 18:11:51,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 247 transitions, 2594 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 18:11:51,412 INFO L231 Difference]: Finished difference. Result has 160 places, 187 transitions, 1830 flow [2024-06-27 18:11:51,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1830, PETRI_PLACES=160, PETRI_TRANSITIONS=187} [2024-06-27 18:11:51,415 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 104 predicate places. [2024-06-27 18:11:51,415 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 187 transitions, 1830 flow [2024-06-27 18:11:51,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:51,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:51,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:51,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 18:11:51,416 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:51,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash -754929075, now seen corresponding path program 9 times [2024-06-27 18:11:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655521041] [2024-06-27 18:11:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:52,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:52,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655521041] [2024-06-27 18:11:52,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655521041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:52,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:52,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:52,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480561631] [2024-06-27 18:11:52,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:52,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:52,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:52,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:52,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:52,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 187 transitions, 1830 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:52,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:52,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:52,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:54,100 INFO L124 PetriNetUnfolderBase]: 6150/9490 cut-off events. [2024-06-27 18:11:54,100 INFO L125 PetriNetUnfolderBase]: For 295063/295075 co-relation queries the response was YES. [2024-06-27 18:11:54,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50774 conditions, 9490 events. 6150/9490 cut-off events. For 295063/295075 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 59016 event pairs, 1708 based on Foata normal form. 8/9319 useless extension candidates. Maximal degree in co-relation 50708. Up to 7720 conditions per place. [2024-06-27 18:11:54,181 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 144 selfloop transitions, 91 changer transitions 0/245 dead transitions. [2024-06-27 18:11:54,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 245 transitions, 2622 flow [2024-06-27 18:11:54,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:54,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:11:54,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-06-27 18:11:54,190 INFO L175 Difference]: Start difference. First operand has 160 places, 187 transitions, 1830 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:11:54,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 245 transitions, 2622 flow [2024-06-27 18:11:54,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 245 transitions, 2345 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 18:11:54,440 INFO L231 Difference]: Finished difference. Result has 162 places, 187 transitions, 1743 flow [2024-06-27 18:11:54,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1743, PETRI_PLACES=162, PETRI_TRANSITIONS=187} [2024-06-27 18:11:54,442 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-27 18:11:54,442 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 187 transitions, 1743 flow [2024-06-27 18:11:54,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:54,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:54,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:54,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 18:11:54,443 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:54,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:54,443 INFO L85 PathProgramCache]: Analyzing trace with hash -754691925, now seen corresponding path program 10 times [2024-06-27 18:11:54,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:54,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302224482] [2024-06-27 18:11:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:54,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:55,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:55,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302224482] [2024-06-27 18:11:55,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302224482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:55,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:55,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:55,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029795118] [2024-06-27 18:11:55,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:55,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:55,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:55,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:55,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:55,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:55,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 187 transitions, 1743 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:55,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:55,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:55,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:57,144 INFO L124 PetriNetUnfolderBase]: 6140/9476 cut-off events. [2024-06-27 18:11:57,145 INFO L125 PetriNetUnfolderBase]: For 299493/299505 co-relation queries the response was YES. [2024-06-27 18:11:57,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50641 conditions, 9476 events. 6140/9476 cut-off events. For 299493/299505 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 58924 event pairs, 1717 based on Foata normal form. 8/9305 useless extension candidates. Maximal degree in co-relation 50574. Up to 7712 conditions per place. [2024-06-27 18:11:57,219 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 145 selfloop transitions, 88 changer transitions 0/243 dead transitions. [2024-06-27 18:11:57,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 243 transitions, 2369 flow [2024-06-27 18:11:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:11:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:11:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:11:57,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-06-27 18:11:57,220 INFO L175 Difference]: Start difference. First operand has 162 places, 187 transitions, 1743 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:11:57,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 243 transitions, 2369 flow [2024-06-27 18:11:57,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 243 transitions, 2133 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 18:11:57,440 INFO L231 Difference]: Finished difference. Result has 163 places, 187 transitions, 1691 flow [2024-06-27 18:11:57,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1691, PETRI_PLACES=163, PETRI_TRANSITIONS=187} [2024-06-27 18:11:57,441 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 107 predicate places. [2024-06-27 18:11:57,441 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 187 transitions, 1691 flow [2024-06-27 18:11:57,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:57,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:11:57,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:11:57,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 18:11:57,442 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:11:57,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:11:57,442 INFO L85 PathProgramCache]: Analyzing trace with hash -754929261, now seen corresponding path program 5 times [2024-06-27 18:11:57,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:11:57,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384625132] [2024-06-27 18:11:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:11:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:11:57,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:11:58,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:11:58,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:11:58,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384625132] [2024-06-27 18:11:58,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384625132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:11:58,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:11:58,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:11:58,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596195814] [2024-06-27 18:11:58,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:11:58,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:11:58,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:11:58,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:11:58,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:11:58,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:11:58,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 187 transitions, 1691 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:11:58,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:11:58,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:11:58,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:11:59,951 INFO L124 PetriNetUnfolderBase]: 6135/9516 cut-off events. [2024-06-27 18:11:59,951 INFO L125 PetriNetUnfolderBase]: For 307007/307016 co-relation queries the response was YES. [2024-06-27 18:12:00,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50632 conditions, 9516 events. 6135/9516 cut-off events. For 307007/307016 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 59670 event pairs, 1834 based on Foata normal form. 4/9316 useless extension candidates. Maximal degree in co-relation 50564. Up to 8367 conditions per place. [2024-06-27 18:12:00,046 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 172 selfloop transitions, 56 changer transitions 0/238 dead transitions. [2024-06-27 18:12:00,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 238 transitions, 2287 flow [2024-06-27 18:12:00,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:12:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:12:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 18:12:00,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5088888888888888 [2024-06-27 18:12:00,052 INFO L175 Difference]: Start difference. First operand has 163 places, 187 transitions, 1691 flow. Second operand 9 states and 229 transitions. [2024-06-27 18:12:00,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 238 transitions, 2287 flow [2024-06-27 18:12:00,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 238 transitions, 2003 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 18:12:00,341 INFO L231 Difference]: Finished difference. Result has 162 places, 187 transitions, 1527 flow [2024-06-27 18:12:00,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1407, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1527, PETRI_PLACES=162, PETRI_TRANSITIONS=187} [2024-06-27 18:12:00,341 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-27 18:12:00,342 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 187 transitions, 1527 flow [2024-06-27 18:12:00,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:00,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:00,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:00,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 18:12:00,342 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:00,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:00,343 INFO L85 PathProgramCache]: Analyzing trace with hash 632212475, now seen corresponding path program 2 times [2024-06-27 18:12:00,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:00,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573188292] [2024-06-27 18:12:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:00,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:00,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:01,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:01,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573188292] [2024-06-27 18:12:01,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573188292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:01,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:12:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104059599] [2024-06-27 18:12:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:01,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:12:01,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:01,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:12:01,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:12:01,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:12:01,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 187 transitions, 1527 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:01,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:01,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:12:01,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:02,178 INFO L124 PetriNetUnfolderBase]: 5008/8272 cut-off events. [2024-06-27 18:12:02,178 INFO L125 PetriNetUnfolderBase]: For 309952/310036 co-relation queries the response was YES. [2024-06-27 18:12:02,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43968 conditions, 8272 events. 5008/8272 cut-off events. For 309952/310036 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 56402 event pairs, 1857 based on Foata normal form. 26/8100 useless extension candidates. Maximal degree in co-relation 43899. Up to 6968 conditions per place. [2024-06-27 18:12:02,263 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 138 selfloop transitions, 18 changer transitions 0/209 dead transitions. [2024-06-27 18:12:02,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 209 transitions, 1923 flow [2024-06-27 18:12:02,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:12:02,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:12:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 18:12:02,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-06-27 18:12:02,265 INFO L175 Difference]: Start difference. First operand has 162 places, 187 transitions, 1527 flow. Second operand 6 states and 158 transitions. [2024-06-27 18:12:02,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 209 transitions, 1923 flow [2024-06-27 18:12:02,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 209 transitions, 1733 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 18:12:02,570 INFO L231 Difference]: Finished difference. Result has 158 places, 190 transitions, 1419 flow [2024-06-27 18:12:02,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1419, PETRI_PLACES=158, PETRI_TRANSITIONS=190} [2024-06-27 18:12:02,571 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 102 predicate places. [2024-06-27 18:12:02,571 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 190 transitions, 1419 flow [2024-06-27 18:12:02,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:02,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:02,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:02,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 18:12:02,571 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:02,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash 460210927, now seen corresponding path program 1 times [2024-06-27 18:12:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:02,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834543865] [2024-06-27 18:12:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:02,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:03,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834543865] [2024-06-27 18:12:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834543865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:03,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:03,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:12:03,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161758597] [2024-06-27 18:12:03,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:03,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:12:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:12:03,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:12:03,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:12:03,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 190 transitions, 1419 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:03,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:03,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:12:03,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:04,376 INFO L124 PetriNetUnfolderBase]: 5039/8211 cut-off events. [2024-06-27 18:12:04,376 INFO L125 PetriNetUnfolderBase]: For 279051/279053 co-relation queries the response was YES. [2024-06-27 18:12:04,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43623 conditions, 8211 events. 5039/8211 cut-off events. For 279051/279053 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 54163 event pairs, 1665 based on Foata normal form. 3/8041 useless extension candidates. Maximal degree in co-relation 43553. Up to 7110 conditions per place. [2024-06-27 18:12:04,460 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 182 selfloop transitions, 13 changer transitions 0/217 dead transitions. [2024-06-27 18:12:04,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 217 transitions, 1929 flow [2024-06-27 18:12:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:12:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:12:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:12:04,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 18:12:04,462 INFO L175 Difference]: Start difference. First operand has 158 places, 190 transitions, 1419 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:12:04,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 217 transitions, 1929 flow [2024-06-27 18:12:04,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 217 transitions, 1869 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 18:12:04,739 INFO L231 Difference]: Finished difference. Result has 161 places, 197 transitions, 1480 flow [2024-06-27 18:12:04,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1480, PETRI_PLACES=161, PETRI_TRANSITIONS=197} [2024-06-27 18:12:04,740 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 105 predicate places. [2024-06-27 18:12:04,740 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 197 transitions, 1480 flow [2024-06-27 18:12:04,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:04,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:04,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:04,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 18:12:04,741 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:04,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:04,741 INFO L85 PathProgramCache]: Analyzing trace with hash 632220411, now seen corresponding path program 2 times [2024-06-27 18:12:04,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:04,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177163410] [2024-06-27 18:12:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:04,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:05,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177163410] [2024-06-27 18:12:05,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177163410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:05,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 18:12:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592565102] [2024-06-27 18:12:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 18:12:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 18:12:05,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 18:12:05,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:12:05,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 197 transitions, 1480 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:05,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:05,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:12:05,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:06,743 INFO L124 PetriNetUnfolderBase]: 5045/8365 cut-off events. [2024-06-27 18:12:06,743 INFO L125 PetriNetUnfolderBase]: For 289970/289978 co-relation queries the response was YES. [2024-06-27 18:12:06,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44957 conditions, 8365 events. 5045/8365 cut-off events. For 289970/289978 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 56464 event pairs, 1661 based on Foata normal form. 7/8158 useless extension candidates. Maximal degree in co-relation 44885. Up to 7093 conditions per place. [2024-06-27 18:12:06,815 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 179 selfloop transitions, 18 changer transitions 0/219 dead transitions. [2024-06-27 18:12:06,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 219 transitions, 1970 flow [2024-06-27 18:12:06,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 18:12:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 18:12:06,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 18:12:06,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 18:12:06,817 INFO L175 Difference]: Start difference. First operand has 161 places, 197 transitions, 1480 flow. Second operand 6 states and 153 transitions. [2024-06-27 18:12:06,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 219 transitions, 1970 flow [2024-06-27 18:12:07,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 219 transitions, 1919 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 18:12:07,206 INFO L231 Difference]: Finished difference. Result has 164 places, 200 transitions, 1519 flow [2024-06-27 18:12:07,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1429, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1519, PETRI_PLACES=164, PETRI_TRANSITIONS=200} [2024-06-27 18:12:07,207 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-06-27 18:12:07,207 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 200 transitions, 1519 flow [2024-06-27 18:12:07,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:07,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:07,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:07,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 18:12:07,208 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:07,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:07,208 INFO L85 PathProgramCache]: Analyzing trace with hash 565553573, now seen corresponding path program 1 times [2024-06-27 18:12:07,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:07,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750669120] [2024-06-27 18:12:07,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:07,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:08,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:08,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750669120] [2024-06-27 18:12:08,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750669120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:08,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:08,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:08,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550085578] [2024-06-27 18:12:08,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:08,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:08,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:08,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:08,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:08,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:08,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 200 transitions, 1519 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:08,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:08,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:08,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:10,229 INFO L124 PetriNetUnfolderBase]: 6202/9746 cut-off events. [2024-06-27 18:12:10,229 INFO L125 PetriNetUnfolderBase]: For 362720/362720 co-relation queries the response was YES. [2024-06-27 18:12:10,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54010 conditions, 9746 events. 6202/9746 cut-off events. For 362720/362720 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 62427 event pairs, 1988 based on Foata normal form. 4/9552 useless extension candidates. Maximal degree in co-relation 53937. Up to 8664 conditions per place. [2024-06-27 18:12:10,312 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 234 selfloop transitions, 29 changer transitions 0/273 dead transitions. [2024-06-27 18:12:10,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 2293 flow [2024-06-27 18:12:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:10,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 18:12:10,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 18:12:10,313 INFO L175 Difference]: Start difference. First operand has 164 places, 200 transitions, 1519 flow. Second operand 10 states and 258 transitions. [2024-06-27 18:12:10,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 2293 flow [2024-06-27 18:12:10,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 273 transitions, 2225 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 18:12:10,700 INFO L231 Difference]: Finished difference. Result has 170 places, 203 transitions, 1575 flow [2024-06-27 18:12:10,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1575, PETRI_PLACES=170, PETRI_TRANSITIONS=203} [2024-06-27 18:12:10,701 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 114 predicate places. [2024-06-27 18:12:10,701 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 203 transitions, 1575 flow [2024-06-27 18:12:10,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:10,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:10,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:10,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 18:12:10,702 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:10,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash 483842281, now seen corresponding path program 2 times [2024-06-27 18:12:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:10,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085851149] [2024-06-27 18:12:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:11,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:11,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085851149] [2024-06-27 18:12:11,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085851149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:11,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:11,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:11,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291197252] [2024-06-27 18:12:11,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:11,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:11,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:11,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:11,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:11,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 203 transitions, 1575 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:11,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:11,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:11,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:13,911 INFO L124 PetriNetUnfolderBase]: 6304/9843 cut-off events. [2024-06-27 18:12:13,912 INFO L125 PetriNetUnfolderBase]: For 386563/386569 co-relation queries the response was YES. [2024-06-27 18:12:13,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56269 conditions, 9843 events. 6304/9843 cut-off events. For 386563/386569 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 62569 event pairs, 1670 based on Foata normal form. 5/9673 useless extension candidates. Maximal degree in co-relation 56195. Up to 7495 conditions per place. [2024-06-27 18:12:13,991 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 168 selfloop transitions, 112 changer transitions 0/290 dead transitions. [2024-06-27 18:12:13,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 290 transitions, 2901 flow [2024-06-27 18:12:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:13,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 277 transitions. [2024-06-27 18:12:13,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554 [2024-06-27 18:12:13,993 INFO L175 Difference]: Start difference. First operand has 170 places, 203 transitions, 1575 flow. Second operand 10 states and 277 transitions. [2024-06-27 18:12:13,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 290 transitions, 2901 flow [2024-06-27 18:12:14,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 290 transitions, 2801 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 18:12:14,414 INFO L231 Difference]: Finished difference. Result has 172 places, 212 transitions, 1887 flow [2024-06-27 18:12:14,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1887, PETRI_PLACES=172, PETRI_TRANSITIONS=212} [2024-06-27 18:12:14,415 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-27 18:12:14,415 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 212 transitions, 1887 flow [2024-06-27 18:12:14,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:14,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:14,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:14,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 18:12:14,416 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:14,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:14,416 INFO L85 PathProgramCache]: Analyzing trace with hash 483847861, now seen corresponding path program 3 times [2024-06-27 18:12:14,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:14,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46678713] [2024-06-27 18:12:14,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:14,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:15,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:15,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46678713] [2024-06-27 18:12:15,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46678713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:15,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:15,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:15,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854324242] [2024-06-27 18:12:15,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:15,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:15,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:15,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:15,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:15,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:15,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 212 transitions, 1887 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:15,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:15,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:15,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:17,439 INFO L124 PetriNetUnfolderBase]: 6294/9829 cut-off events. [2024-06-27 18:12:17,439 INFO L125 PetriNetUnfolderBase]: For 401545/401551 co-relation queries the response was YES. [2024-06-27 18:12:17,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57656 conditions, 9829 events. 6294/9829 cut-off events. For 401545/401551 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 62447 event pairs, 1670 based on Foata normal form. 5/9659 useless extension candidates. Maximal degree in co-relation 57581. Up to 7487 conditions per place. [2024-06-27 18:12:17,533 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 164 selfloop transitions, 113 changer transitions 0/287 dead transitions. [2024-06-27 18:12:17,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 287 transitions, 2849 flow [2024-06-27 18:12:17,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:17,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:17,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 18:12:17,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-06-27 18:12:17,535 INFO L175 Difference]: Start difference. First operand has 172 places, 212 transitions, 1887 flow. Second operand 10 states and 273 transitions. [2024-06-27 18:12:17,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 287 transitions, 2849 flow [2024-06-27 18:12:18,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 287 transitions, 2653 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-27 18:12:18,072 INFO L231 Difference]: Finished difference. Result has 177 places, 212 transitions, 1925 flow [2024-06-27 18:12:18,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1925, PETRI_PLACES=177, PETRI_TRANSITIONS=212} [2024-06-27 18:12:18,072 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 121 predicate places. [2024-06-27 18:12:18,072 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 212 transitions, 1925 flow [2024-06-27 18:12:18,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:18,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:18,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:18,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 18:12:18,073 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:18,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:18,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1893717443, now seen corresponding path program 4 times [2024-06-27 18:12:18,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:18,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022688792] [2024-06-27 18:12:18,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:18,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:19,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:19,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022688792] [2024-06-27 18:12:19,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022688792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:19,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:19,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:19,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797179513] [2024-06-27 18:12:19,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:19,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:19,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:19,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:19,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:19,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 212 transitions, 1925 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:19,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:19,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:19,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:21,063 INFO L124 PetriNetUnfolderBase]: 6396/10065 cut-off events. [2024-06-27 18:12:21,064 INFO L125 PetriNetUnfolderBase]: For 419620/419626 co-relation queries the response was YES. [2024-06-27 18:12:21,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59583 conditions, 10065 events. 6396/10065 cut-off events. For 419620/419626 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 64748 event pairs, 1744 based on Foata normal form. 5/9878 useless extension candidates. Maximal degree in co-relation 59506. Up to 7573 conditions per place. [2024-06-27 18:12:21,169 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 168 selfloop transitions, 114 changer transitions 0/292 dead transitions. [2024-06-27 18:12:21,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 292 transitions, 3201 flow [2024-06-27 18:12:21,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 18:12:21,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-06-27 18:12:21,170 INFO L175 Difference]: Start difference. First operand has 177 places, 212 transitions, 1925 flow. Second operand 10 states and 273 transitions. [2024-06-27 18:12:21,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 292 transitions, 3201 flow [2024-06-27 18:12:21,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 292 transitions, 3006 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:12:21,584 INFO L231 Difference]: Finished difference. Result has 179 places, 218 transitions, 2082 flow [2024-06-27 18:12:21,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2082, PETRI_PLACES=179, PETRI_TRANSITIONS=218} [2024-06-27 18:12:21,585 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-06-27 18:12:21,585 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 218 transitions, 2082 flow [2024-06-27 18:12:21,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:21,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:21,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:21,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 18:12:21,586 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:21,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:21,586 INFO L85 PathProgramCache]: Analyzing trace with hash 571065683, now seen corresponding path program 5 times [2024-06-27 18:12:21,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:21,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579350606] [2024-06-27 18:12:21,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:21,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579350606] [2024-06-27 18:12:22,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579350606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:22,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:22,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:22,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385342647] [2024-06-27 18:12:22,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:22,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:22,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:22,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:22,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:22,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 218 transitions, 2082 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:22,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:22,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:22,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:24,349 INFO L124 PetriNetUnfolderBase]: 6442/10138 cut-off events. [2024-06-27 18:12:24,350 INFO L125 PetriNetUnfolderBase]: For 437597/437603 co-relation queries the response was YES. [2024-06-27 18:12:24,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60418 conditions, 10138 events. 6442/10138 cut-off events. For 437597/437603 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 65346 event pairs, 1735 based on Foata normal form. 5/9951 useless extension candidates. Maximal degree in co-relation 60340. Up to 7612 conditions per place. [2024-06-27 18:12:24,472 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 172 selfloop transitions, 114 changer transitions 0/296 dead transitions. [2024-06-27 18:12:24,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 296 transitions, 3323 flow [2024-06-27 18:12:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-06-27 18:12:24,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.552 [2024-06-27 18:12:24,474 INFO L175 Difference]: Start difference. First operand has 179 places, 218 transitions, 2082 flow. Second operand 10 states and 276 transitions. [2024-06-27 18:12:24,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 296 transitions, 3323 flow [2024-06-27 18:12:25,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 296 transitions, 3118 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 18:12:25,098 INFO L231 Difference]: Finished difference. Result has 183 places, 221 transitions, 2174 flow [2024-06-27 18:12:25,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1886, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2174, PETRI_PLACES=183, PETRI_TRANSITIONS=221} [2024-06-27 18:12:25,099 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 127 predicate places. [2024-06-27 18:12:25,099 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 221 transitions, 2174 flow [2024-06-27 18:12:25,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:25,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:25,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:25,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 18:12:25,100 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:25,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash 571060103, now seen corresponding path program 6 times [2024-06-27 18:12:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:25,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934824849] [2024-06-27 18:12:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:26,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:26,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934824849] [2024-06-27 18:12:26,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934824849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:26,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:26,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:26,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222689621] [2024-06-27 18:12:26,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:26,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:26,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:26,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:26,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 221 transitions, 2174 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:26,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:26,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:26,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:28,285 INFO L124 PetriNetUnfolderBase]: 6432/10124 cut-off events. [2024-06-27 18:12:28,286 INFO L125 PetriNetUnfolderBase]: For 447501/447507 co-relation queries the response was YES. [2024-06-27 18:12:28,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60249 conditions, 10124 events. 6432/10124 cut-off events. For 447501/447507 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 65215 event pairs, 1733 based on Foata normal form. 5/9937 useless extension candidates. Maximal degree in co-relation 60170. Up to 7604 conditions per place. [2024-06-27 18:12:28,391 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 169 selfloop transitions, 115 changer transitions 0/294 dead transitions. [2024-06-27 18:12:28,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 294 transitions, 3158 flow [2024-06-27 18:12:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:28,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 18:12:28,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-06-27 18:12:28,393 INFO L175 Difference]: Start difference. First operand has 183 places, 221 transitions, 2174 flow. Second operand 10 states and 273 transitions. [2024-06-27 18:12:28,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 294 transitions, 3158 flow [2024-06-27 18:12:29,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 294 transitions, 2850 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 18:12:29,054 INFO L231 Difference]: Finished difference. Result has 185 places, 221 transitions, 2104 flow [2024-06-27 18:12:29,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2104, PETRI_PLACES=185, PETRI_TRANSITIONS=221} [2024-06-27 18:12:29,055 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 129 predicate places. [2024-06-27 18:12:29,055 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 221 transitions, 2104 flow [2024-06-27 18:12:29,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:29,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:29,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:29,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 18:12:29,056 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:29,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:29,056 INFO L85 PathProgramCache]: Analyzing trace with hash 475732269, now seen corresponding path program 1 times [2024-06-27 18:12:29,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:29,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510343984] [2024-06-27 18:12:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:29,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:29,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:29,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:29,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510343984] [2024-06-27 18:12:29,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510343984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:29,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:29,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:12:29,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721395324] [2024-06-27 18:12:29,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:29,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:12:29,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:29,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:12:29,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:12:29,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:12:29,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 221 transitions, 2104 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:29,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:29,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:12:29,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:31,370 INFO L124 PetriNetUnfolderBase]: 5700/9250 cut-off events. [2024-06-27 18:12:31,370 INFO L125 PetriNetUnfolderBase]: For 449390/449452 co-relation queries the response was YES. [2024-06-27 18:12:31,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55622 conditions, 9250 events. 5700/9250 cut-off events. For 449390/449452 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 62162 event pairs, 1939 based on Foata normal form. 7/9031 useless extension candidates. Maximal degree in co-relation 55542. Up to 7887 conditions per place. [2024-06-27 18:12:31,461 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 198 selfloop transitions, 17 changer transitions 0/260 dead transitions. [2024-06-27 18:12:31,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 260 transitions, 2696 flow [2024-06-27 18:12:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:12:31,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:12:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:12:31,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-06-27 18:12:31,462 INFO L175 Difference]: Start difference. First operand has 185 places, 221 transitions, 2104 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:12:31,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 260 transitions, 2696 flow [2024-06-27 18:12:31,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 260 transitions, 2505 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 18:12:31,861 INFO L231 Difference]: Finished difference. Result has 185 places, 228 transitions, 2052 flow [2024-06-27 18:12:31,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1915, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2052, PETRI_PLACES=185, PETRI_TRANSITIONS=228} [2024-06-27 18:12:31,862 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 129 predicate places. [2024-06-27 18:12:31,862 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 228 transitions, 2052 flow [2024-06-27 18:12:31,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:31,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:31,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:31,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 18:12:31,862 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:31,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1630913674, now seen corresponding path program 1 times [2024-06-27 18:12:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:31,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864379881] [2024-06-27 18:12:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:33,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:33,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864379881] [2024-06-27 18:12:33,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864379881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:33,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:33,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:12:33,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127501039] [2024-06-27 18:12:33,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:33,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:12:33,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:33,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:12:33,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:12:33,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:12:33,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 228 transitions, 2052 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:33,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:33,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:12:33,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:35,049 INFO L124 PetriNetUnfolderBase]: 6111/9698 cut-off events. [2024-06-27 18:12:35,049 INFO L125 PetriNetUnfolderBase]: For 476845/476851 co-relation queries the response was YES. [2024-06-27 18:12:35,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58972 conditions, 9698 events. 6111/9698 cut-off events. For 476845/476851 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 63343 event pairs, 1895 based on Foata normal form. 5/9490 useless extension candidates. Maximal degree in co-relation 58890. Up to 8342 conditions per place. [2024-06-27 18:12:35,136 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 226 selfloop transitions, 40 changer transitions 0/289 dead transitions. [2024-06-27 18:12:35,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 289 transitions, 2833 flow [2024-06-27 18:12:35,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:12:35,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:12:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-27 18:12:35,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2024-06-27 18:12:35,137 INFO L175 Difference]: Start difference. First operand has 185 places, 228 transitions, 2052 flow. Second operand 9 states and 238 transitions. [2024-06-27 18:12:35,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 289 transitions, 2833 flow [2024-06-27 18:12:35,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 289 transitions, 2768 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 18:12:35,575 INFO L231 Difference]: Finished difference. Result has 191 places, 233 transitions, 2155 flow [2024-06-27 18:12:35,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2155, PETRI_PLACES=191, PETRI_TRANSITIONS=233} [2024-06-27 18:12:35,575 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 135 predicate places. [2024-06-27 18:12:35,576 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 233 transitions, 2155 flow [2024-06-27 18:12:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:35,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:35,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:35,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 18:12:35,576 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:35,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:35,577 INFO L85 PathProgramCache]: Analyzing trace with hash 698378629, now seen corresponding path program 7 times [2024-06-27 18:12:35,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:35,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429493278] [2024-06-27 18:12:35,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:35,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:35,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:36,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:36,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429493278] [2024-06-27 18:12:36,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429493278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:36,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:36,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:36,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030900133] [2024-06-27 18:12:36,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:36,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:36,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:36,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:36,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 233 transitions, 2155 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:36,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:36,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:36,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:38,479 INFO L124 PetriNetUnfolderBase]: 6588/10433 cut-off events. [2024-06-27 18:12:38,480 INFO L125 PetriNetUnfolderBase]: For 507977/507983 co-relation queries the response was YES. [2024-06-27 18:12:38,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63955 conditions, 10433 events. 6588/10433 cut-off events. For 507977/507983 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 68096 event pairs, 1803 based on Foata normal form. 5/10230 useless extension candidates. Maximal degree in co-relation 63871. Up to 7768 conditions per place. [2024-06-27 18:12:38,605 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 173 selfloop transitions, 127 changer transitions 0/310 dead transitions. [2024-06-27 18:12:38,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 310 transitions, 3525 flow [2024-06-27 18:12:38,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:38,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-06-27 18:12:38,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.542 [2024-06-27 18:12:38,607 INFO L175 Difference]: Start difference. First operand has 191 places, 233 transitions, 2155 flow. Second operand 10 states and 271 transitions. [2024-06-27 18:12:38,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 310 transitions, 3525 flow [2024-06-27 18:12:39,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 310 transitions, 3402 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 18:12:39,124 INFO L231 Difference]: Finished difference. Result has 195 places, 239 transitions, 2416 flow [2024-06-27 18:12:39,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2416, PETRI_PLACES=195, PETRI_TRANSITIONS=239} [2024-06-27 18:12:39,124 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 139 predicate places. [2024-06-27 18:12:39,124 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 239 transitions, 2416 flow [2024-06-27 18:12:39,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:39,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:39,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:39,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 18:12:39,125 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:39,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash -841699959, now seen corresponding path program 8 times [2024-06-27 18:12:39,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:39,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959603373] [2024-06-27 18:12:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:39,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:40,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:40,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959603373] [2024-06-27 18:12:40,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959603373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:40,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:40,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:40,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420149213] [2024-06-27 18:12:40,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:40,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:40,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:40,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:40,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:40,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:40,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 239 transitions, 2416 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:40,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:40,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:40,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:42,197 INFO L124 PetriNetUnfolderBase]: 6690/10557 cut-off events. [2024-06-27 18:12:42,198 INFO L125 PetriNetUnfolderBase]: For 537126/537132 co-relation queries the response was YES. [2024-06-27 18:12:42,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66148 conditions, 10557 events. 6690/10557 cut-off events. For 537126/537132 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 68656 event pairs, 1776 based on Foata normal form. 5/10367 useless extension candidates. Maximal degree in co-relation 66063. Up to 7854 conditions per place. [2024-06-27 18:12:42,329 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 181 selfloop transitions, 128 changer transitions 0/319 dead transitions. [2024-06-27 18:12:42,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 319 transitions, 4044 flow [2024-06-27 18:12:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:42,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:42,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 276 transitions. [2024-06-27 18:12:42,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.552 [2024-06-27 18:12:42,331 INFO L175 Difference]: Start difference. First operand has 195 places, 239 transitions, 2416 flow. Second operand 10 states and 276 transitions. [2024-06-27 18:12:42,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 319 transitions, 4044 flow [2024-06-27 18:12:42,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 319 transitions, 3825 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 18:12:42,921 INFO L231 Difference]: Finished difference. Result has 199 places, 245 transitions, 2595 flow [2024-06-27 18:12:42,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2595, PETRI_PLACES=199, PETRI_TRANSITIONS=245} [2024-06-27 18:12:42,922 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 143 predicate places. [2024-06-27 18:12:42,922 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 245 transitions, 2595 flow [2024-06-27 18:12:42,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:42,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:42,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:42,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 18:12:42,923 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:42,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:42,923 INFO L85 PathProgramCache]: Analyzing trace with hash 691021399, now seen corresponding path program 9 times [2024-06-27 18:12:42,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:42,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493367994] [2024-06-27 18:12:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:42,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:43,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:43,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493367994] [2024-06-27 18:12:43,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493367994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:43,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:43,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:43,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002536890] [2024-06-27 18:12:43,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:43,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:43,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:44,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:44,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 245 transitions, 2595 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:44,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:44,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:44,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:46,073 INFO L124 PetriNetUnfolderBase]: 6680/10552 cut-off events. [2024-06-27 18:12:46,073 INFO L125 PetriNetUnfolderBase]: For 548370/548376 co-relation queries the response was YES. [2024-06-27 18:12:46,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65904 conditions, 10552 events. 6680/10552 cut-off events. For 548370/548376 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 68706 event pairs, 1774 based on Foata normal form. 5/10362 useless extension candidates. Maximal degree in co-relation 65818. Up to 7846 conditions per place. [2024-06-27 18:12:46,202 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 177 selfloop transitions, 130 changer transitions 0/317 dead transitions. [2024-06-27 18:12:46,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 317 transitions, 3879 flow [2024-06-27 18:12:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:46,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:46,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 18:12:46,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-06-27 18:12:46,204 INFO L175 Difference]: Start difference. First operand has 199 places, 245 transitions, 2595 flow. Second operand 10 states and 273 transitions. [2024-06-27 18:12:46,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 317 transitions, 3879 flow [2024-06-27 18:12:46,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 317 transitions, 3589 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 18:12:46,944 INFO L231 Difference]: Finished difference. Result has 203 places, 245 transitions, 2573 flow [2024-06-27 18:12:46,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2573, PETRI_PLACES=203, PETRI_TRANSITIONS=245} [2024-06-27 18:12:46,945 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 147 predicate places. [2024-06-27 18:12:46,945 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 245 transitions, 2573 flow [2024-06-27 18:12:46,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:46,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:46,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:46,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 18:12:46,946 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:46,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:46,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1623486787, now seen corresponding path program 10 times [2024-06-27 18:12:46,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:46,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915686264] [2024-06-27 18:12:46,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:46,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:47,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:47,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:47,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915686264] [2024-06-27 18:12:47,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915686264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:47,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:47,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:12:47,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310762908] [2024-06-27 18:12:47,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:47,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:12:47,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:47,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:12:47,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:12:47,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:12:47,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 245 transitions, 2573 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:47,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:47,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:12:47,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:49,954 INFO L124 PetriNetUnfolderBase]: 6670/10553 cut-off events. [2024-06-27 18:12:49,954 INFO L125 PetriNetUnfolderBase]: For 555873/555879 co-relation queries the response was YES. [2024-06-27 18:12:50,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65656 conditions, 10553 events. 6670/10553 cut-off events. For 555873/555879 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 68836 event pairs, 1789 based on Foata normal form. 5/10354 useless extension candidates. Maximal degree in co-relation 65569. Up to 7838 conditions per place. [2024-06-27 18:12:50,082 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 178 selfloop transitions, 127 changer transitions 0/315 dead transitions. [2024-06-27 18:12:50,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 315 transitions, 3639 flow [2024-06-27 18:12:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:12:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:12:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 273 transitions. [2024-06-27 18:12:50,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546 [2024-06-27 18:12:50,084 INFO L175 Difference]: Start difference. First operand has 203 places, 245 transitions, 2573 flow. Second operand 10 states and 273 transitions. [2024-06-27 18:12:50,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 315 transitions, 3639 flow [2024-06-27 18:12:50,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 315 transitions, 3398 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 18:12:50,807 INFO L231 Difference]: Finished difference. Result has 206 places, 245 transitions, 2594 flow [2024-06-27 18:12:50,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2594, PETRI_PLACES=206, PETRI_TRANSITIONS=245} [2024-06-27 18:12:50,808 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 150 predicate places. [2024-06-27 18:12:50,808 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 245 transitions, 2594 flow [2024-06-27 18:12:50,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:50,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:50,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:50,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 18:12:50,808 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:50,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:50,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1974967453, now seen corresponding path program 1 times [2024-06-27 18:12:50,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:50,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798409984] [2024-06-27 18:12:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:50,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:51,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:51,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798409984] [2024-06-27 18:12:51,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798409984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:51,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:51,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:12:51,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851443688] [2024-06-27 18:12:51,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:51,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:12:51,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:51,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:12:51,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:12:52,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:12:52,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 245 transitions, 2594 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:52,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:52,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:12:52,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:53,587 INFO L124 PetriNetUnfolderBase]: 5494/9026 cut-off events. [2024-06-27 18:12:53,587 INFO L125 PetriNetUnfolderBase]: For 562186/562427 co-relation queries the response was YES. [2024-06-27 18:12:53,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58371 conditions, 9026 events. 5494/9026 cut-off events. For 562186/562427 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 61532 event pairs, 1795 based on Foata normal form. 9/8735 useless extension candidates. Maximal degree in co-relation 58283. Up to 7536 conditions per place. [2024-06-27 18:12:53,688 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 202 selfloop transitions, 16 changer transitions 0/276 dead transitions. [2024-06-27 18:12:53,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 276 transitions, 3148 flow [2024-06-27 18:12:53,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:12:53,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:12:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 18:12:53,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-27 18:12:53,690 INFO L175 Difference]: Start difference. First operand has 206 places, 245 transitions, 2594 flow. Second operand 7 states and 185 transitions. [2024-06-27 18:12:53,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 276 transitions, 3148 flow [2024-06-27 18:12:54,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 276 transitions, 2808 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-27 18:12:54,091 INFO L231 Difference]: Finished difference. Result has 202 places, 248 transitions, 2336 flow [2024-06-27 18:12:54,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2254, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2336, PETRI_PLACES=202, PETRI_TRANSITIONS=248} [2024-06-27 18:12:54,092 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 146 predicate places. [2024-06-27 18:12:54,092 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 248 transitions, 2336 flow [2024-06-27 18:12:54,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:54,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:54,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:54,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 18:12:54,092 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:54,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:54,093 INFO L85 PathProgramCache]: Analyzing trace with hash 476121009, now seen corresponding path program 2 times [2024-06-27 18:12:54,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:54,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795314125] [2024-06-27 18:12:54,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:54,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:54,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:54,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:54,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795314125] [2024-06-27 18:12:54,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795314125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:54,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:54,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:12:54,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049924774] [2024-06-27 18:12:54,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:54,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:12:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:54,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:12:54,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:12:54,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:12:54,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 248 transitions, 2336 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:54,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:54,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:12:54,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:12:56,578 INFO L124 PetriNetUnfolderBase]: 5903/9584 cut-off events. [2024-06-27 18:12:56,578 INFO L125 PetriNetUnfolderBase]: For 571535/571589 co-relation queries the response was YES. [2024-06-27 18:12:56,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60963 conditions, 9584 events. 5903/9584 cut-off events. For 571535/571589 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 64533 event pairs, 1861 based on Foata normal form. 6/9339 useless extension candidates. Maximal degree in co-relation 60874. Up to 8141 conditions per place. [2024-06-27 18:12:56,671 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 212 selfloop transitions, 22 changer transitions 0/279 dead transitions. [2024-06-27 18:12:56,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 279 transitions, 2932 flow [2024-06-27 18:12:56,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:12:56,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:12:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 18:12:56,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171428571428571 [2024-06-27 18:12:56,673 INFO L175 Difference]: Start difference. First operand has 202 places, 248 transitions, 2336 flow. Second operand 7 states and 181 transitions. [2024-06-27 18:12:56,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 279 transitions, 2932 flow [2024-06-27 18:12:57,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 279 transitions, 2872 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 18:12:57,157 INFO L231 Difference]: Finished difference. Result has 204 places, 251 transitions, 2380 flow [2024-06-27 18:12:57,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2276, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2380, PETRI_PLACES=204, PETRI_TRANSITIONS=251} [2024-06-27 18:12:57,158 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 148 predicate places. [2024-06-27 18:12:57,158 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 251 transitions, 2380 flow [2024-06-27 18:12:57,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:57,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:12:57,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:12:57,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 18:12:57,159 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:12:57,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:12:57,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1358474102, now seen corresponding path program 2 times [2024-06-27 18:12:57,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:12:57,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168124574] [2024-06-27 18:12:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:12:57,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:12:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:12:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:12:58,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:12:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168124574] [2024-06-27 18:12:58,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168124574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:12:58,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:12:58,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:12:58,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144532192] [2024-06-27 18:12:58,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:12:58,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:12:58,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:12:58,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:12:58,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:12:58,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:12:58,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 251 transitions, 2380 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:12:58,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:12:58,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:12:58,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:00,142 INFO L124 PetriNetUnfolderBase]: 6395/10168 cut-off events. [2024-06-27 18:13:00,142 INFO L125 PetriNetUnfolderBase]: For 602423/602446 co-relation queries the response was YES. [2024-06-27 18:13:00,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65129 conditions, 10168 events. 6395/10168 cut-off events. For 602423/602446 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 67034 event pairs, 1938 based on Foata normal form. 20/9981 useless extension candidates. Maximal degree in co-relation 65039. Up to 8717 conditions per place. [2024-06-27 18:13:00,250 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 239 selfloop transitions, 49 changer transitions 0/312 dead transitions. [2024-06-27 18:13:00,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 312 transitions, 3241 flow [2024-06-27 18:13:00,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:13:00,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:13:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 18:13:00,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-06-27 18:13:00,251 INFO L175 Difference]: Start difference. First operand has 204 places, 251 transitions, 2380 flow. Second operand 9 states and 233 transitions. [2024-06-27 18:13:00,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 312 transitions, 3241 flow [2024-06-27 18:13:00,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 312 transitions, 3159 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 18:13:00,823 INFO L231 Difference]: Finished difference. Result has 209 places, 261 transitions, 2552 flow [2024-06-27 18:13:00,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2552, PETRI_PLACES=209, PETRI_TRANSITIONS=261} [2024-06-27 18:13:00,824 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 153 predicate places. [2024-06-27 18:13:00,824 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 261 transitions, 2552 flow [2024-06-27 18:13:00,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:00,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:00,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:00,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 18:13:00,825 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:00,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:00,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1347046262, now seen corresponding path program 3 times [2024-06-27 18:13:00,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:00,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837356973] [2024-06-27 18:13:00,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:00,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:00,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:01,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:01,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837356973] [2024-06-27 18:13:01,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837356973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:01,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:01,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:13:01,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727546669] [2024-06-27 18:13:01,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:01,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:13:01,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:01,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:13:01,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:13:02,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:13:02,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 261 transitions, 2552 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:02,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:02,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:13:02,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:03,948 INFO L124 PetriNetUnfolderBase]: 6432/10242 cut-off events. [2024-06-27 18:13:03,949 INFO L125 PetriNetUnfolderBase]: For 625672/625693 co-relation queries the response was YES. [2024-06-27 18:13:04,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67086 conditions, 10242 events. 6432/10242 cut-off events. For 625672/625693 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 67785 event pairs, 1830 based on Foata normal form. 18/10037 useless extension candidates. Maximal degree in co-relation 66994. Up to 8612 conditions per place. [2024-06-27 18:13:04,046 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 239 selfloop transitions, 56 changer transitions 0/319 dead transitions. [2024-06-27 18:13:04,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 319 transitions, 3654 flow [2024-06-27 18:13:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:13:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:13:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-27 18:13:04,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5244444444444445 [2024-06-27 18:13:04,048 INFO L175 Difference]: Start difference. First operand has 209 places, 261 transitions, 2552 flow. Second operand 9 states and 236 transitions. [2024-06-27 18:13:04,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 319 transitions, 3654 flow [2024-06-27 18:13:04,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 319 transitions, 3536 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 18:13:04,700 INFO L231 Difference]: Finished difference. Result has 214 places, 265 transitions, 2677 flow [2024-06-27 18:13:04,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2677, PETRI_PLACES=214, PETRI_TRANSITIONS=265} [2024-06-27 18:13:04,701 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 158 predicate places. [2024-06-27 18:13:04,701 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 265 transitions, 2677 flow [2024-06-27 18:13:04,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:04,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:04,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:04,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 18:13:04,702 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:04,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:04,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1672173332, now seen corresponding path program 4 times [2024-06-27 18:13:04,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:04,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399370724] [2024-06-27 18:13:04,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:04,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:05,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:05,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:05,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399370724] [2024-06-27 18:13:05,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399370724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:05,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:05,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:13:05,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496918728] [2024-06-27 18:13:05,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:05,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:13:05,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:13:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:13:05,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:13:05,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 265 transitions, 2677 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:05,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:05,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:13:05,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:07,951 INFO L124 PetriNetUnfolderBase]: 6469/10288 cut-off events. [2024-06-27 18:13:07,951 INFO L125 PetriNetUnfolderBase]: For 647135/647156 co-relation queries the response was YES. [2024-06-27 18:13:08,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67015 conditions, 10288 events. 6469/10288 cut-off events. For 647135/647156 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 68062 event pairs, 1972 based on Foata normal form. 18/10053 useless extension candidates. Maximal degree in co-relation 66922. Up to 8827 conditions per place. [2024-06-27 18:13:08,069 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 247 selfloop transitions, 48 changer transitions 0/319 dead transitions. [2024-06-27 18:13:08,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 319 transitions, 3498 flow [2024-06-27 18:13:08,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:13:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:13:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 18:13:08,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:13:08,071 INFO L175 Difference]: Start difference. First operand has 214 places, 265 transitions, 2677 flow. Second operand 9 states and 234 transitions. [2024-06-27 18:13:08,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 319 transitions, 3498 flow [2024-06-27 18:13:08,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 319 transitions, 3342 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 18:13:08,737 INFO L231 Difference]: Finished difference. Result has 219 places, 268 transitions, 2713 flow [2024-06-27 18:13:08,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2713, PETRI_PLACES=219, PETRI_TRANSITIONS=268} [2024-06-27 18:13:08,738 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 163 predicate places. [2024-06-27 18:13:08,738 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 268 transitions, 2713 flow [2024-06-27 18:13:08,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:08,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:08,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:08,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 18:13:08,738 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:08,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:08,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1672450379, now seen corresponding path program 11 times [2024-06-27 18:13:08,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:08,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639341635] [2024-06-27 18:13:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:09,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:09,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639341635] [2024-06-27 18:13:09,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639341635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:09,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:09,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:13:09,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771462417] [2024-06-27 18:13:09,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:09,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:13:09,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:09,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:13:09,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:13:09,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:13:09,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 268 transitions, 2713 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:09,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:09,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:13:09,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:11,973 INFO L124 PetriNetUnfolderBase]: 6884/10969 cut-off events. [2024-06-27 18:13:11,974 INFO L125 PetriNetUnfolderBase]: For 664994/665006 co-relation queries the response was YES. [2024-06-27 18:13:12,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70105 conditions, 10969 events. 6884/10969 cut-off events. For 664994/665006 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 72507 event pairs, 1888 based on Foata normal form. 7/10748 useless extension candidates. Maximal degree in co-relation 70009. Up to 8103 conditions per place. [2024-06-27 18:13:12,121 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 181 selfloop transitions, 145 changer transitions 0/336 dead transitions. [2024-06-27 18:13:12,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 336 transitions, 3880 flow [2024-06-27 18:13:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:13:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:13:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-27 18:13:12,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528 [2024-06-27 18:13:12,124 INFO L175 Difference]: Start difference. First operand has 219 places, 268 transitions, 2713 flow. Second operand 10 states and 264 transitions. [2024-06-27 18:13:12,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 336 transitions, 3880 flow [2024-06-27 18:13:13,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 336 transitions, 3749 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-27 18:13:13,108 INFO L231 Difference]: Finished difference. Result has 223 places, 271 transitions, 2947 flow [2024-06-27 18:13:13,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2947, PETRI_PLACES=223, PETRI_TRANSITIONS=271} [2024-06-27 18:13:13,109 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 167 predicate places. [2024-06-27 18:13:13,109 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 271 transitions, 2947 flow [2024-06-27 18:13:13,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:13,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:13,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:13,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 18:13:13,123 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:13,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:13,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1927761597, now seen corresponding path program 12 times [2024-06-27 18:13:13,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:13,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026818856] [2024-06-27 18:13:13,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:13,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026818856] [2024-06-27 18:13:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026818856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:14,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:14,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:13:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967215572] [2024-06-27 18:13:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:14,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:13:14,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:14,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:13:14,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:13:14,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:13:14,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 271 transitions, 2947 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:14,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:14,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:13:14,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:16,335 INFO L124 PetriNetUnfolderBase]: 6986/11101 cut-off events. [2024-06-27 18:13:16,335 INFO L125 PetriNetUnfolderBase]: For 701074/701086 co-relation queries the response was YES. [2024-06-27 18:13:16,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72495 conditions, 11101 events. 6986/11101 cut-off events. For 701074/701086 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 73242 event pairs, 1873 based on Foata normal form. 7/10895 useless extension candidates. Maximal degree in co-relation 72398. Up to 8189 conditions per place. [2024-06-27 18:13:16,481 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 192 selfloop transitions, 143 changer transitions 0/345 dead transitions. [2024-06-27 18:13:16,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 345 transitions, 4465 flow [2024-06-27 18:13:16,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:13:16,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:13:16,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-06-27 18:13:16,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-27 18:13:16,482 INFO L175 Difference]: Start difference. First operand has 223 places, 271 transitions, 2947 flow. Second operand 10 states and 270 transitions. [2024-06-27 18:13:16,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 345 transitions, 4465 flow [2024-06-27 18:13:17,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 345 transitions, 4203 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 18:13:17,397 INFO L231 Difference]: Finished difference. Result has 226 places, 277 transitions, 3125 flow [2024-06-27 18:13:17,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2703, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3125, PETRI_PLACES=226, PETRI_TRANSITIONS=277} [2024-06-27 18:13:17,398 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 170 predicate places. [2024-06-27 18:13:17,398 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 277 transitions, 3125 flow [2024-06-27 18:13:17,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:17,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:17,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:17,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 18:13:17,399 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:17,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1920334710, now seen corresponding path program 5 times [2024-06-27 18:13:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:17,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774579395] [2024-06-27 18:13:17,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:17,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:18,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:18,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774579395] [2024-06-27 18:13:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774579395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:18,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:18,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 18:13:18,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355653495] [2024-06-27 18:13:18,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:18,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 18:13:18,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:18,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 18:13:18,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 18:13:18,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:13:18,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 277 transitions, 3125 flow. Second operand has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:18,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:18,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:13:18,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:20,907 INFO L124 PetriNetUnfolderBase]: 6609/10538 cut-off events. [2024-06-27 18:13:20,907 INFO L125 PetriNetUnfolderBase]: For 711836/711857 co-relation queries the response was YES. [2024-06-27 18:13:20,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69572 conditions, 10538 events. 6609/10538 cut-off events. For 711836/711857 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 70238 event pairs, 2002 based on Foata normal form. 18/10298 useless extension candidates. Maximal degree in co-relation 69474. Up to 9021 conditions per place. [2024-06-27 18:13:21,028 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 257 selfloop transitions, 47 changer transitions 0/328 dead transitions. [2024-06-27 18:13:21,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 328 transitions, 3889 flow [2024-06-27 18:13:21,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 18:13:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 18:13:21,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 18:13:21,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-06-27 18:13:21,029 INFO L175 Difference]: Start difference. First operand has 226 places, 277 transitions, 3125 flow. Second operand 9 states and 235 transitions. [2024-06-27 18:13:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 328 transitions, 3889 flow [2024-06-27 18:13:21,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 328 transitions, 3317 flow, removed 30 selfloop flow, removed 10 redundant places. [2024-06-27 18:13:21,781 INFO L231 Difference]: Finished difference. Result has 225 places, 277 transitions, 2654 flow [2024-06-27 18:13:21,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2654, PETRI_PLACES=225, PETRI_TRANSITIONS=277} [2024-06-27 18:13:21,781 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 169 predicate places. [2024-06-27 18:13:21,781 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 277 transitions, 2654 flow [2024-06-27 18:13:21,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.3) internal successors, (153), 10 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:21,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:21,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:21,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 18:13:21,782 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:21,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:21,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1920611757, now seen corresponding path program 13 times [2024-06-27 18:13:21,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:21,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212009582] [2024-06-27 18:13:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:21,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:22,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212009582] [2024-06-27 18:13:22,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212009582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:22,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:22,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:13:22,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311886499] [2024-06-27 18:13:22,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:22,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:13:22,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:22,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:13:22,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:13:22,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:13:22,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 277 transitions, 2654 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:22,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:22,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:13:22,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:24,954 INFO L124 PetriNetUnfolderBase]: 6968/11108 cut-off events. [2024-06-27 18:13:24,954 INFO L125 PetriNetUnfolderBase]: For 703380/703392 co-relation queries the response was YES. [2024-06-27 18:13:25,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70597 conditions, 11108 events. 6968/11108 cut-off events. For 703380/703392 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 73570 event pairs, 1881 based on Foata normal form. 7/10889 useless extension candidates. Maximal degree in co-relation 70498. Up to 8169 conditions per place. [2024-06-27 18:13:25,088 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 194 selfloop transitions, 140 changer transitions 0/344 dead transitions. [2024-06-27 18:13:25,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 344 transitions, 3790 flow [2024-06-27 18:13:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:13:25,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:13:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-06-27 18:13:25,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538 [2024-06-27 18:13:25,090 INFO L175 Difference]: Start difference. First operand has 225 places, 277 transitions, 2654 flow. Second operand 10 states and 269 transitions. [2024-06-27 18:13:25,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 344 transitions, 3790 flow [2024-06-27 18:13:26,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 344 transitions, 3603 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-27 18:13:26,036 INFO L231 Difference]: Finished difference. Result has 224 places, 277 transitions, 2755 flow [2024-06-27 18:13:26,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2467, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2755, PETRI_PLACES=224, PETRI_TRANSITIONS=277} [2024-06-27 18:13:26,037 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2024-06-27 18:13:26,037 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 277 transitions, 2755 flow [2024-06-27 18:13:26,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:26,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:26,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:26,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 18:13:26,038 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:26,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:26,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1927968987, now seen corresponding path program 14 times [2024-06-27 18:13:26,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:26,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82754686] [2024-06-27 18:13:26,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:26,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:26,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82754686] [2024-06-27 18:13:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82754686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:26,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:26,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:13:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463551675] [2024-06-27 18:13:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:26,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:13:26,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:13:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:13:27,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:13:27,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 277 transitions, 2755 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:27,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:27,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:13:27,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:29,270 INFO L124 PetriNetUnfolderBase]: 7014/11161 cut-off events. [2024-06-27 18:13:29,270 INFO L125 PetriNetUnfolderBase]: For 725413/725425 co-relation queries the response was YES. [2024-06-27 18:13:29,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71879 conditions, 11161 events. 7014/11161 cut-off events. For 725413/725425 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 73854 event pairs, 1854 based on Foata normal form. 7/10950 useless extension candidates. Maximal degree in co-relation 71782. Up to 8208 conditions per place. [2024-06-27 18:13:29,463 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 185 selfloop transitions, 151 changer transitions 0/346 dead transitions. [2024-06-27 18:13:29,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 346 transitions, 3956 flow [2024-06-27 18:13:29,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:13:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:13:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 266 transitions. [2024-06-27 18:13:29,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532 [2024-06-27 18:13:29,471 INFO L175 Difference]: Start difference. First operand has 224 places, 277 transitions, 2755 flow. Second operand 10 states and 266 transitions. [2024-06-27 18:13:29,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 346 transitions, 3956 flow [2024-06-27 18:13:30,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 346 transitions, 3546 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-27 18:13:30,747 INFO L231 Difference]: Finished difference. Result has 224 places, 280 transitions, 2716 flow [2024-06-27 18:13:30,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2354, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2716, PETRI_PLACES=224, PETRI_TRANSITIONS=280} [2024-06-27 18:13:30,748 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 168 predicate places. [2024-06-27 18:13:30,748 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 280 transitions, 2716 flow [2024-06-27 18:13:30,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:30,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:30,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 18:13:30,749 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:30,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1596525907, now seen corresponding path program 15 times [2024-06-27 18:13:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:30,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912338668] [2024-06-27 18:13:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:30,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:31,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:31,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912338668] [2024-06-27 18:13:31,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912338668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:31,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:31,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:13:31,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358229194] [2024-06-27 18:13:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:31,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:13:31,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:31,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:13:31,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:13:31,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:13:31,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 280 transitions, 2716 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:31,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:31,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:13:31,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:34,487 INFO L124 PetriNetUnfolderBase]: 7004/11143 cut-off events. [2024-06-27 18:13:34,487 INFO L125 PetriNetUnfolderBase]: For 731721/731733 co-relation queries the response was YES. [2024-06-27 18:13:34,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71779 conditions, 11143 events. 7004/11143 cut-off events. For 731721/731733 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 73622 event pairs, 1851 based on Foata normal form. 7/10937 useless extension candidates. Maximal degree in co-relation 71681. Up to 8200 conditions per place. [2024-06-27 18:13:34,671 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 186 selfloop transitions, 148 changer transitions 0/344 dead transitions. [2024-06-27 18:13:34,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 344 transitions, 3594 flow [2024-06-27 18:13:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:13:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:13:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-27 18:13:34,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-27 18:13:34,673 INFO L175 Difference]: Start difference. First operand has 224 places, 280 transitions, 2716 flow. Second operand 10 states and 265 transitions. [2024-06-27 18:13:34,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 344 transitions, 3594 flow [2024-06-27 18:13:35,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 344 transitions, 3090 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 18:13:35,922 INFO L231 Difference]: Finished difference. Result has 225 places, 280 transitions, 2516 flow [2024-06-27 18:13:35,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2212, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2516, PETRI_PLACES=225, PETRI_TRANSITIONS=280} [2024-06-27 18:13:35,923 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 169 predicate places. [2024-06-27 18:13:35,923 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 280 transitions, 2516 flow [2024-06-27 18:13:35,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:35,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:35,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:35,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 18:13:35,924 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:35,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1876232673, now seen corresponding path program 2 times [2024-06-27 18:13:35,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:35,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276226123] [2024-06-27 18:13:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:35,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:37,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:37,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276226123] [2024-06-27 18:13:37,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276226123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:37,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:37,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:13:37,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287478077] [2024-06-27 18:13:37,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:37,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:13:37,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:37,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:13:37,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:13:37,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:13:37,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 280 transitions, 2516 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:37,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:37,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:13:37,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:38,731 INFO L124 PetriNetUnfolderBase]: 5790/9631 cut-off events. [2024-06-27 18:13:38,731 INFO L125 PetriNetUnfolderBase]: For 729503/729662 co-relation queries the response was YES. [2024-06-27 18:13:38,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63889 conditions, 9631 events. 5790/9631 cut-off events. For 729503/729662 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 66868 event pairs, 1806 based on Foata normal form. 25/9219 useless extension candidates. Maximal degree in co-relation 63790. Up to 7873 conditions per place. [2024-06-27 18:13:38,849 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 226 selfloop transitions, 28 changer transitions 0/313 dead transitions. [2024-06-27 18:13:38,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 313 transitions, 3350 flow [2024-06-27 18:13:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:13:38,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:13:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 18:13:38,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257142857142857 [2024-06-27 18:13:38,851 INFO L175 Difference]: Start difference. First operand has 225 places, 280 transitions, 2516 flow. Second operand 7 states and 184 transitions. [2024-06-27 18:13:38,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 313 transitions, 3350 flow [2024-06-27 18:13:39,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 313 transitions, 3024 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 18:13:39,811 INFO L231 Difference]: Finished difference. Result has 223 places, 288 transitions, 2381 flow [2024-06-27 18:13:39,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2381, PETRI_PLACES=223, PETRI_TRANSITIONS=288} [2024-06-27 18:13:39,812 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 167 predicate places. [2024-06-27 18:13:39,812 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 288 transitions, 2381 flow [2024-06-27 18:13:39,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:39,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:39,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:39,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 18:13:39,813 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:39,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:39,813 INFO L85 PathProgramCache]: Analyzing trace with hash 489094509, now seen corresponding path program 3 times [2024-06-27 18:13:39,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:39,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169478306] [2024-06-27 18:13:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:39,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:40,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:40,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169478306] [2024-06-27 18:13:40,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169478306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:40,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:40,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:13:40,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754623395] [2024-06-27 18:13:40,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:40,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:13:40,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:40,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:13:40,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:13:40,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:13:40,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 288 transitions, 2381 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:40,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:40,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:13:40,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:42,499 INFO L124 PetriNetUnfolderBase]: 6160/10214 cut-off events. [2024-06-27 18:13:42,500 INFO L125 PetriNetUnfolderBase]: For 750469/750543 co-relation queries the response was YES. [2024-06-27 18:13:42,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66337 conditions, 10214 events. 6160/10214 cut-off events. For 750469/750543 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 70978 event pairs, 1887 based on Foata normal form. 12/9900 useless extension candidates. Maximal degree in co-relation 66236. Up to 8487 conditions per place. [2024-06-27 18:13:42,830 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 241 selfloop transitions, 29 changer transitions 0/315 dead transitions. [2024-06-27 18:13:42,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 315 transitions, 3053 flow [2024-06-27 18:13:42,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:13:42,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:13:42,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 18:13:42,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5085714285714286 [2024-06-27 18:13:42,832 INFO L175 Difference]: Start difference. First operand has 223 places, 288 transitions, 2381 flow. Second operand 7 states and 178 transitions. [2024-06-27 18:13:42,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 315 transitions, 3053 flow [2024-06-27 18:13:43,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 315 transitions, 2983 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 18:13:43,520 INFO L231 Difference]: Finished difference. Result has 227 places, 291 transitions, 2437 flow [2024-06-27 18:13:43,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2311, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2437, PETRI_PLACES=227, PETRI_TRANSITIONS=291} [2024-06-27 18:13:43,520 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 171 predicate places. [2024-06-27 18:13:43,521 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 291 transitions, 2437 flow [2024-06-27 18:13:43,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:43,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:43,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:43,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 18:13:43,521 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:43,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:43,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1876248483, now seen corresponding path program 3 times [2024-06-27 18:13:43,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:43,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649401293] [2024-06-27 18:13:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:43,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:44,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:44,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649401293] [2024-06-27 18:13:44,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649401293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:44,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:44,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:13:44,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832299916] [2024-06-27 18:13:44,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:44,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:13:44,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:44,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:13:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:13:44,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:13:44,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 291 transitions, 2437 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:44,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:44,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:13:44,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:46,129 INFO L124 PetriNetUnfolderBase]: 5788/9651 cut-off events. [2024-06-27 18:13:46,129 INFO L125 PetriNetUnfolderBase]: For 764999/765113 co-relation queries the response was YES. [2024-06-27 18:13:46,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64574 conditions, 9651 events. 5788/9651 cut-off events. For 764999/765113 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 67320 event pairs, 1807 based on Foata normal form. 25/9250 useless extension candidates. Maximal degree in co-relation 64471. Up to 7905 conditions per place. [2024-06-27 18:13:46,260 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 235 selfloop transitions, 21 changer transitions 0/316 dead transitions. [2024-06-27 18:13:46,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 316 transitions, 3032 flow [2024-06-27 18:13:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:13:46,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:13:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 18:13:46,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:13:46,262 INFO L175 Difference]: Start difference. First operand has 227 places, 291 transitions, 2437 flow. Second operand 7 states and 182 transitions. [2024-06-27 18:13:46,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 316 transitions, 3032 flow [2024-06-27 18:13:47,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 316 transitions, 2898 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 18:13:47,185 INFO L231 Difference]: Finished difference. Result has 229 places, 292 transitions, 2360 flow [2024-06-27 18:13:47,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2360, PETRI_PLACES=229, PETRI_TRANSITIONS=292} [2024-06-27 18:13:47,186 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 173 predicate places. [2024-06-27 18:13:47,186 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 292 transitions, 2360 flow [2024-06-27 18:13:47,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:47,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:47,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:47,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 18:13:47,187 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:47,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:47,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1381487213, now seen corresponding path program 1 times [2024-06-27 18:13:47,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:47,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731376674] [2024-06-27 18:13:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:47,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:47,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:47,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:47,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731376674] [2024-06-27 18:13:47,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731376674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:47,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:47,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:13:47,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874479435] [2024-06-27 18:13:47,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:47,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:13:47,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:47,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:13:47,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:13:47,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:13:47,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 292 transitions, 2360 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:47,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:47,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:13:47,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:49,855 INFO L124 PetriNetUnfolderBase]: 6220/10162 cut-off events. [2024-06-27 18:13:49,855 INFO L125 PetriNetUnfolderBase]: For 789852/789876 co-relation queries the response was YES. [2024-06-27 18:13:49,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67866 conditions, 10162 events. 6220/10162 cut-off events. For 789852/789876 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 69508 event pairs, 1817 based on Foata normal form. 2/9911 useless extension candidates. Maximal degree in co-relation 67762. Up to 8602 conditions per place. [2024-06-27 18:13:49,968 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 279 selfloop transitions, 17 changer transitions 0/326 dead transitions. [2024-06-27 18:13:49,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 326 transitions, 3107 flow [2024-06-27 18:13:49,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:13:49,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:13:49,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 18:13:49,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5114285714285715 [2024-06-27 18:13:49,969 INFO L175 Difference]: Start difference. First operand has 229 places, 292 transitions, 2360 flow. Second operand 7 states and 179 transitions. [2024-06-27 18:13:49,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 326 transitions, 3107 flow [2024-06-27 18:13:50,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 326 transitions, 3061 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 18:13:50,600 INFO L231 Difference]: Finished difference. Result has 232 places, 299 transitions, 2456 flow [2024-06-27 18:13:50,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2456, PETRI_PLACES=232, PETRI_TRANSITIONS=299} [2024-06-27 18:13:50,601 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 176 predicate places. [2024-06-27 18:13:50,601 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 299 transitions, 2456 flow [2024-06-27 18:13:50,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:50,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:50,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:50,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 18:13:50,602 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:50,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2083578715, now seen corresponding path program 2 times [2024-06-27 18:13:50,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:50,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180363830] [2024-06-27 18:13:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:50,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:51,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:51,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180363830] [2024-06-27 18:13:51,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180363830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:51,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:51,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:13:51,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272779816] [2024-06-27 18:13:51,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:51,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:13:51,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:51,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:13:51,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:13:51,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:13:51,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 299 transitions, 2456 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:51,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:51,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:13:51,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:53,414 INFO L124 PetriNetUnfolderBase]: 6254/10214 cut-off events. [2024-06-27 18:13:53,415 INFO L125 PetriNetUnfolderBase]: For 813434/813458 co-relation queries the response was YES. [2024-06-27 18:13:53,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69607 conditions, 10214 events. 6254/10214 cut-off events. For 813434/813458 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 69900 event pairs, 1815 based on Foata normal form. 2/9963 useless extension candidates. Maximal degree in co-relation 69501. Up to 8617 conditions per place. [2024-06-27 18:13:53,545 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 277 selfloop transitions, 22 changer transitions 0/329 dead transitions. [2024-06-27 18:13:53,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 329 transitions, 3194 flow [2024-06-27 18:13:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:13:53,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:13:53,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:13:53,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-27 18:13:53,546 INFO L175 Difference]: Start difference. First operand has 232 places, 299 transitions, 2456 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:13:53,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 329 transitions, 3194 flow [2024-06-27 18:13:54,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 329 transitions, 3117 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 18:13:54,645 INFO L231 Difference]: Finished difference. Result has 235 places, 302 transitions, 2491 flow [2024-06-27 18:13:54,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2491, PETRI_PLACES=235, PETRI_TRANSITIONS=302} [2024-06-27 18:13:54,646 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 179 predicate places. [2024-06-27 18:13:54,646 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 302 transitions, 2491 flow [2024-06-27 18:13:54,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:54,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:54,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:54,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 18:13:54,647 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:54,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:54,647 INFO L85 PathProgramCache]: Analyzing trace with hash 687589745, now seen corresponding path program 1 times [2024-06-27 18:13:54,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:54,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842167421] [2024-06-27 18:13:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:54,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:55,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:55,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842167421] [2024-06-27 18:13:55,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842167421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:55,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:55,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:13:55,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306699555] [2024-06-27 18:13:55,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:55,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:13:55,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:55,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:13:55,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:13:55,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:13:55,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 302 transitions, 2491 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:55,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:55,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:13:55,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:13:57,251 INFO L124 PetriNetUnfolderBase]: 6265/10236 cut-off events. [2024-06-27 18:13:57,251 INFO L125 PetriNetUnfolderBase]: For 838056/838080 co-relation queries the response was YES. [2024-06-27 18:13:57,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70618 conditions, 10236 events. 6265/10236 cut-off events. For 838056/838080 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 70094 event pairs, 1812 based on Foata normal form. 3/9984 useless extension candidates. Maximal degree in co-relation 70511. Up to 8663 conditions per place. [2024-06-27 18:13:57,380 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 285 selfloop transitions, 16 changer transitions 0/331 dead transitions. [2024-06-27 18:13:57,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 331 transitions, 3215 flow [2024-06-27 18:13:57,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:13:57,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:13:57,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:13:57,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-06-27 18:13:57,382 INFO L175 Difference]: Start difference. First operand has 235 places, 302 transitions, 2491 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:13:57,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 331 transitions, 3215 flow [2024-06-27 18:13:58,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 331 transitions, 3125 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 18:13:58,301 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 2487 flow [2024-06-27 18:13:58,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2487, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-06-27 18:13:58,310 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 181 predicate places. [2024-06-27 18:13:58,310 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 2487 flow [2024-06-27 18:13:58,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:58,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:13:58,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:13:58,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 18:13:58,311 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:13:58,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:13:58,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1387230893, now seen corresponding path program 3 times [2024-06-27 18:13:58,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:13:58,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518716686] [2024-06-27 18:13:58,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:13:58,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:13:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:13:59,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:13:59,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:13:59,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518716686] [2024-06-27 18:13:59,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518716686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:13:59,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:13:59,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:13:59,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963638873] [2024-06-27 18:13:59,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:13:59,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:13:59,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:13:59,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:13:59,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:13:59,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:13:59,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 2487 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:13:59,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:13:59,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:13:59,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:01,038 INFO L124 PetriNetUnfolderBase]: 6310/10439 cut-off events. [2024-06-27 18:14:01,039 INFO L125 PetriNetUnfolderBase]: For 852848/852889 co-relation queries the response was YES. [2024-06-27 18:14:01,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71882 conditions, 10439 events. 6310/10439 cut-off events. For 852848/852889 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 72660 event pairs, 1814 based on Foata normal form. 4/10146 useless extension candidates. Maximal degree in co-relation 71774. Up to 8647 conditions per place. [2024-06-27 18:14:01,214 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 275 selfloop transitions, 29 changer transitions 0/334 dead transitions. [2024-06-27 18:14:01,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 334 transitions, 3249 flow [2024-06-27 18:14:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:01,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:14:01,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-27 18:14:01,216 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 2487 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:14:01,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 334 transitions, 3249 flow [2024-06-27 18:14:02,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 334 transitions, 3187 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 18:14:02,138 INFO L231 Difference]: Finished difference. Result has 239 places, 308 transitions, 2559 flow [2024-06-27 18:14:02,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2425, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2559, PETRI_PLACES=239, PETRI_TRANSITIONS=308} [2024-06-27 18:14:02,139 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 183 predicate places. [2024-06-27 18:14:02,139 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 308 transitions, 2559 flow [2024-06-27 18:14:02,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:02,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:02,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:02,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 18:14:02,140 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:02,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:02,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1876002467, now seen corresponding path program 2 times [2024-06-27 18:14:02,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:02,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166313882] [2024-06-27 18:14:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:02,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:03,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:03,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166313882] [2024-06-27 18:14:03,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166313882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:03,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:03,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:03,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691281747] [2024-06-27 18:14:03,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:03,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:03,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:03,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:03,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:14:03,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 308 transitions, 2559 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:03,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:03,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:14:03,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:05,164 INFO L124 PetriNetUnfolderBase]: 6356/10512 cut-off events. [2024-06-27 18:14:05,164 INFO L125 PetriNetUnfolderBase]: For 879226/879267 co-relation queries the response was YES. [2024-06-27 18:14:05,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73316 conditions, 10512 events. 6356/10512 cut-off events. For 879226/879267 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 73160 event pairs, 1810 based on Foata normal form. 9/10220 useless extension candidates. Maximal degree in co-relation 73207. Up to 8760 conditions per place. [2024-06-27 18:14:05,347 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 285 selfloop transitions, 21 changer transitions 0/336 dead transitions. [2024-06-27 18:14:05,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 336 transitions, 3307 flow [2024-06-27 18:14:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:14:05,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-06-27 18:14:05,349 INFO L175 Difference]: Start difference. First operand has 239 places, 308 transitions, 2559 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:14:05,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 336 transitions, 3307 flow [2024-06-27 18:14:06,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 336 transitions, 3195 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 18:14:06,708 INFO L231 Difference]: Finished difference. Result has 241 places, 311 transitions, 2551 flow [2024-06-27 18:14:06,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2551, PETRI_PLACES=241, PETRI_TRANSITIONS=311} [2024-06-27 18:14:06,708 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 185 predicate places. [2024-06-27 18:14:06,708 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 311 transitions, 2551 flow [2024-06-27 18:14:06,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:06,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:06,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:06,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 18:14:06,709 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:06,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:06,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1875705797, now seen corresponding path program 3 times [2024-06-27 18:14:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:06,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918642589] [2024-06-27 18:14:06,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:06,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:07,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:07,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918642589] [2024-06-27 18:14:07,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918642589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:07,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:07,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:07,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36404071] [2024-06-27 18:14:07,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:07,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:07,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:07,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:07,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:07,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:14:07,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 311 transitions, 2551 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:07,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:07,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:14:07,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:09,669 INFO L124 PetriNetUnfolderBase]: 6401/10682 cut-off events. [2024-06-27 18:14:09,670 INFO L125 PetriNetUnfolderBase]: For 893256/893297 co-relation queries the response was YES. [2024-06-27 18:14:09,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74348 conditions, 10682 events. 6401/10682 cut-off events. For 893256/893297 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 75259 event pairs, 1815 based on Foata normal form. 9/10363 useless extension candidates. Maximal degree in co-relation 74238. Up to 8745 conditions per place. [2024-06-27 18:14:09,802 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 281 selfloop transitions, 33 changer transitions 0/344 dead transitions. [2024-06-27 18:14:09,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 344 transitions, 3547 flow [2024-06-27 18:14:09,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:14:09,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:14:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 18:14:09,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-27 18:14:09,807 INFO L175 Difference]: Start difference. First operand has 241 places, 311 transitions, 2551 flow. Second operand 7 states and 180 transitions. [2024-06-27 18:14:09,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 344 transitions, 3547 flow [2024-06-27 18:14:10,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 344 transitions, 3467 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 18:14:10,896 INFO L231 Difference]: Finished difference. Result has 244 places, 317 transitions, 2689 flow [2024-06-27 18:14:10,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2689, PETRI_PLACES=244, PETRI_TRANSITIONS=317} [2024-06-27 18:14:10,897 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 188 predicate places. [2024-06-27 18:14:10,897 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 317 transitions, 2689 flow [2024-06-27 18:14:10,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:10,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:10,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:10,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 18:14:10,897 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:10,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1875694885, now seen corresponding path program 1 times [2024-06-27 18:14:10,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:10,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002847675] [2024-06-27 18:14:10,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:10,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002847675] [2024-06-27 18:14:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002847675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:12,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:12,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:12,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627492479] [2024-06-27 18:14:12,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:12,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:12,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:12,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:12,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:12,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:14:12,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 317 transitions, 2689 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:12,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:12,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:14:12,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:14,569 INFO L124 PetriNetUnfolderBase]: 5983/10034 cut-off events. [2024-06-27 18:14:14,570 INFO L125 PetriNetUnfolderBase]: For 905142/905241 co-relation queries the response was YES. [2024-06-27 18:14:14,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72193 conditions, 10034 events. 5983/10034 cut-off events. For 905142/905241 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 70593 event pairs, 1821 based on Foata normal form. 17/9600 useless extension candidates. Maximal degree in co-relation 72081. Up to 8141 conditions per place. [2024-06-27 18:14:14,693 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 265 selfloop transitions, 18 changer transitions 0/346 dead transitions. [2024-06-27 18:14:14,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 346 transitions, 3357 flow [2024-06-27 18:14:14,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:14,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:14,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:14:14,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 18:14:14,694 INFO L175 Difference]: Start difference. First operand has 244 places, 317 transitions, 2689 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:14:14,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 346 transitions, 3357 flow [2024-06-27 18:14:15,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 346 transitions, 3247 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-27 18:14:15,569 INFO L231 Difference]: Finished difference. Result has 249 places, 317 transitions, 2621 flow [2024-06-27 18:14:15,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2579, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2621, PETRI_PLACES=249, PETRI_TRANSITIONS=317} [2024-06-27 18:14:15,569 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 193 predicate places. [2024-06-27 18:14:15,569 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 317 transitions, 2621 flow [2024-06-27 18:14:15,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:15,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:15,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:15,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 18:14:15,570 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:15,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1134081752, now seen corresponding path program 1 times [2024-06-27 18:14:15,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:15,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748722348] [2024-06-27 18:14:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:15,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:16,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:16,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:16,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748722348] [2024-06-27 18:14:16,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748722348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:16,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:16,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:14:16,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516699098] [2024-06-27 18:14:16,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:16,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:14:16,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:14:16,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:14:16,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:14:16,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 317 transitions, 2621 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:16,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:16,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:14:16,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:19,198 INFO L124 PetriNetUnfolderBase]: 7304/11605 cut-off events. [2024-06-27 18:14:19,198 INFO L125 PetriNetUnfolderBase]: For 959823/959823 co-relation queries the response was YES. [2024-06-27 18:14:19,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81720 conditions, 11605 events. 7304/11605 cut-off events. For 959823/959823 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 77228 event pairs, 1709 based on Foata normal form. 4/11379 useless extension candidates. Maximal degree in co-relation 81606. Up to 10115 conditions per place. [2024-06-27 18:14:19,330 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 356 selfloop transitions, 35 changer transitions 0/401 dead transitions. [2024-06-27 18:14:19,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 401 transitions, 4057 flow [2024-06-27 18:14:19,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 18:14:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 18:14:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 284 transitions. [2024-06-27 18:14:19,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5163636363636364 [2024-06-27 18:14:19,331 INFO L175 Difference]: Start difference. First operand has 249 places, 317 transitions, 2621 flow. Second operand 11 states and 284 transitions. [2024-06-27 18:14:19,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 401 transitions, 4057 flow [2024-06-27 18:14:20,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 401 transitions, 3963 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-27 18:14:20,291 INFO L231 Difference]: Finished difference. Result has 252 places, 321 transitions, 2744 flow [2024-06-27 18:14:20,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2744, PETRI_PLACES=252, PETRI_TRANSITIONS=321} [2024-06-27 18:14:20,291 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 196 predicate places. [2024-06-27 18:14:20,291 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 321 transitions, 2744 flow [2024-06-27 18:14:20,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:20,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:20,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:20,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 18:14:20,292 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:20,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:20,292 INFO L85 PathProgramCache]: Analyzing trace with hash 242060400, now seen corresponding path program 2 times [2024-06-27 18:14:20,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:20,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832206948] [2024-06-27 18:14:20,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:20,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:21,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:21,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832206948] [2024-06-27 18:14:21,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832206948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:21,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:21,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:14:21,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383679160] [2024-06-27 18:14:21,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:21,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:14:21,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:14:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:14:21,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:14:21,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 321 transitions, 2744 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:21,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:21,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:14:21,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:24,399 INFO L124 PetriNetUnfolderBase]: 7296/11543 cut-off events. [2024-06-27 18:14:24,399 INFO L125 PetriNetUnfolderBase]: For 974892/974892 co-relation queries the response was YES. [2024-06-27 18:14:24,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81993 conditions, 11543 events. 7296/11543 cut-off events. For 974892/974892 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 76378 event pairs, 2030 based on Foata normal form. 4/11330 useless extension candidates. Maximal degree in co-relation 81879. Up to 10198 conditions per place. [2024-06-27 18:14:24,549 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 349 selfloop transitions, 31 changer transitions 0/390 dead transitions. [2024-06-27 18:14:24,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 390 transitions, 3706 flow [2024-06-27 18:14:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:14:24,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:14:24,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-27 18:14:24,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514 [2024-06-27 18:14:24,551 INFO L175 Difference]: Start difference. First operand has 252 places, 321 transitions, 2744 flow. Second operand 10 states and 257 transitions. [2024-06-27 18:14:24,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 390 transitions, 3706 flow [2024-06-27 18:14:25,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 390 transitions, 3542 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-27 18:14:25,641 INFO L231 Difference]: Finished difference. Result has 255 places, 321 transitions, 2649 flow [2024-06-27 18:14:25,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2580, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2649, PETRI_PLACES=255, PETRI_TRANSITIONS=321} [2024-06-27 18:14:25,641 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 199 predicate places. [2024-06-27 18:14:25,642 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 321 transitions, 2649 flow [2024-06-27 18:14:25,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:25,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:25,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:25,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 18:14:25,642 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:25,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1252229882, now seen corresponding path program 3 times [2024-06-27 18:14:25,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:25,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9488944] [2024-06-27 18:14:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:25,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:26,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:26,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9488944] [2024-06-27 18:14:26,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9488944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:26,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:26,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:14:26,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823300743] [2024-06-27 18:14:26,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:26,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:14:26,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:26,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:14:26,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:14:26,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:14:26,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 321 transitions, 2649 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:26,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:26,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:14:26,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:29,659 INFO L124 PetriNetUnfolderBase]: 7333/11596 cut-off events. [2024-06-27 18:14:29,660 INFO L125 PetriNetUnfolderBase]: For 997921/997930 co-relation queries the response was YES. [2024-06-27 18:14:29,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82143 conditions, 11596 events. 7333/11596 cut-off events. For 997921/997930 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 76772 event pairs, 1990 based on Foata normal form. 10/11389 useless extension candidates. Maximal degree in co-relation 82027. Up to 10015 conditions per place. [2024-06-27 18:14:29,907 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 315 selfloop transitions, 66 changer transitions 0/391 dead transitions. [2024-06-27 18:14:29,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 391 transitions, 3701 flow [2024-06-27 18:14:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:14:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:14:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 18:14:29,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:14:29,909 INFO L175 Difference]: Start difference. First operand has 255 places, 321 transitions, 2649 flow. Second operand 10 states and 260 transitions. [2024-06-27 18:14:29,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 391 transitions, 3701 flow [2024-06-27 18:14:31,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 391 transitions, 3634 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 18:14:31,598 INFO L231 Difference]: Finished difference. Result has 256 places, 323 transitions, 2797 flow [2024-06-27 18:14:31,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2582, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2797, PETRI_PLACES=256, PETRI_TRANSITIONS=323} [2024-06-27 18:14:31,599 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 200 predicate places. [2024-06-27 18:14:31,599 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 323 transitions, 2797 flow [2024-06-27 18:14:31,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:31,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:31,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:31,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 18:14:31,601 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:31,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:31,601 INFO L85 PathProgramCache]: Analyzing trace with hash 522990704, now seen corresponding path program 4 times [2024-06-27 18:14:31,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:31,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244904618] [2024-06-27 18:14:31,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:31,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:31,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:32,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:32,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244904618] [2024-06-27 18:14:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244904618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:32,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:32,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:14:32,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029971159] [2024-06-27 18:14:32,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:14:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:14:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:14:32,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:14:32,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 323 transitions, 2797 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:32,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:32,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:14:32,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:35,330 INFO L124 PetriNetUnfolderBase]: 7370/11661 cut-off events. [2024-06-27 18:14:35,330 INFO L125 PetriNetUnfolderBase]: For 1029543/1029552 co-relation queries the response was YES. [2024-06-27 18:14:35,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83744 conditions, 11661 events. 7370/11661 cut-off events. For 1029543/1029552 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 77332 event pairs, 1994 based on Foata normal form. 10/11452 useless extension candidates. Maximal degree in co-relation 83627. Up to 10070 conditions per place. [2024-06-27 18:14:35,489 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 316 selfloop transitions, 64 changer transitions 0/390 dead transitions. [2024-06-27 18:14:35,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 390 transitions, 3843 flow [2024-06-27 18:14:35,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:14:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:14:35,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 18:14:35,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 18:14:35,491 INFO L175 Difference]: Start difference. First operand has 256 places, 323 transitions, 2797 flow. Second operand 10 states and 258 transitions. [2024-06-27 18:14:35,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 390 transitions, 3843 flow [2024-06-27 18:14:36,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 390 transitions, 3646 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 18:14:36,894 INFO L231 Difference]: Finished difference. Result has 258 places, 325 transitions, 2815 flow [2024-06-27 18:14:36,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2600, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2815, PETRI_PLACES=258, PETRI_TRANSITIONS=325} [2024-06-27 18:14:36,895 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 202 predicate places. [2024-06-27 18:14:36,895 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 325 transitions, 2815 flow [2024-06-27 18:14:36,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:36,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:36,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:36,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 18:14:36,896 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:36,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:36,896 INFO L85 PathProgramCache]: Analyzing trace with hash 529670832, now seen corresponding path program 1 times [2024-06-27 18:14:36,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:36,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435035058] [2024-06-27 18:14:36,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:36,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:36,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:37,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:37,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435035058] [2024-06-27 18:14:37,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435035058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:37,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:37,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:14:37,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056922969] [2024-06-27 18:14:37,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:37,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:14:37,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:37,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:14:37,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:14:38,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:14:38,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 325 transitions, 2815 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:38,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:38,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:14:38,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:40,673 INFO L124 PetriNetUnfolderBase]: 7407/11707 cut-off events. [2024-06-27 18:14:40,673 INFO L125 PetriNetUnfolderBase]: For 1057072/1057081 co-relation queries the response was YES. [2024-06-27 18:14:40,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84474 conditions, 11707 events. 7407/11707 cut-off events. For 1057072/1057081 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 77503 event pairs, 1843 based on Foata normal form. 6/11497 useless extension candidates. Maximal degree in co-relation 84356. Up to 9931 conditions per place. [2024-06-27 18:14:40,853 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 308 selfloop transitions, 79 changer transitions 0/397 dead transitions. [2024-06-27 18:14:40,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 397 transitions, 3897 flow [2024-06-27 18:14:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:14:40,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:14:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 18:14:40,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:14:40,855 INFO L175 Difference]: Start difference. First operand has 258 places, 325 transitions, 2815 flow. Second operand 10 states and 260 transitions. [2024-06-27 18:14:40,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 397 transitions, 3897 flow [2024-06-27 18:14:42,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 397 transitions, 3700 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 18:14:42,616 INFO L231 Difference]: Finished difference. Result has 261 places, 330 transitions, 2875 flow [2024-06-27 18:14:42,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2875, PETRI_PLACES=261, PETRI_TRANSITIONS=330} [2024-06-27 18:14:42,617 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 205 predicate places. [2024-06-27 18:14:42,617 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 330 transitions, 2875 flow [2024-06-27 18:14:42,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:42,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:42,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:42,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 18:14:42,618 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:42,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:42,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1082024410, now seen corresponding path program 1 times [2024-06-27 18:14:42,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:42,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874768036] [2024-06-27 18:14:42,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:42,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:43,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:43,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874768036] [2024-06-27 18:14:43,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874768036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:43,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:43,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:43,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715071104] [2024-06-27 18:14:43,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:43,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:43,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:43,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:43,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:14:43,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 330 transitions, 2875 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:43,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:43,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:14:43,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:45,648 INFO L124 PetriNetUnfolderBase]: 6531/10591 cut-off events. [2024-06-27 18:14:45,648 INFO L125 PetriNetUnfolderBase]: For 1056017/1056049 co-relation queries the response was YES. [2024-06-27 18:14:45,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79534 conditions, 10591 events. 6531/10591 cut-off events. For 1056017/1056049 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 72226 event pairs, 1827 based on Foata normal form. 16/10323 useless extension candidates. Maximal degree in co-relation 79414. Up to 8953 conditions per place. [2024-06-27 18:14:45,805 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 305 selfloop transitions, 23 changer transitions 0/380 dead transitions. [2024-06-27 18:14:45,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 380 transitions, 3756 flow [2024-06-27 18:14:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:45,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 18:14:45,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-27 18:14:45,807 INFO L175 Difference]: Start difference. First operand has 261 places, 330 transitions, 2875 flow. Second operand 8 states and 212 transitions. [2024-06-27 18:14:45,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 380 transitions, 3756 flow [2024-06-27 18:14:47,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 380 transitions, 3541 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 18:14:47,250 INFO L231 Difference]: Finished difference. Result has 263 places, 339 transitions, 2855 flow [2024-06-27 18:14:47,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2855, PETRI_PLACES=263, PETRI_TRANSITIONS=339} [2024-06-27 18:14:47,251 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 207 predicate places. [2024-06-27 18:14:47,251 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 339 transitions, 2855 flow [2024-06-27 18:14:47,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:47,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:47,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:47,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 18:14:47,252 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:47,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:47,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1862799258, now seen corresponding path program 2 times [2024-06-27 18:14:47,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:47,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376385053] [2024-06-27 18:14:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:47,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:48,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376385053] [2024-06-27 18:14:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376385053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:48,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022467169] [2024-06-27 18:14:48,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:48,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:48,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:48,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:14:48,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 339 transitions, 2855 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:48,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:48,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:14:48,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:50,531 INFO L124 PetriNetUnfolderBase]: 6548/10627 cut-off events. [2024-06-27 18:14:50,531 INFO L125 PetriNetUnfolderBase]: For 1079313/1079349 co-relation queries the response was YES. [2024-06-27 18:14:50,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80416 conditions, 10627 events. 6548/10627 cut-off events. For 1079313/1079349 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 72559 event pairs, 1825 based on Foata normal form. 17/10359 useless extension candidates. Maximal degree in co-relation 80294. Up to 8956 conditions per place. [2024-06-27 18:14:50,698 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 299 selfloop transitions, 28 changer transitions 0/379 dead transitions. [2024-06-27 18:14:50,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 379 transitions, 3693 flow [2024-06-27 18:14:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:50,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 18:14:50,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225 [2024-06-27 18:14:50,700 INFO L175 Difference]: Start difference. First operand has 263 places, 339 transitions, 2855 flow. Second operand 8 states and 209 transitions. [2024-06-27 18:14:50,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 379 transitions, 3693 flow [2024-06-27 18:14:52,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 379 transitions, 3587 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 18:14:52,062 INFO L231 Difference]: Finished difference. Result has 266 places, 342 transitions, 2891 flow [2024-06-27 18:14:52,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2749, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2891, PETRI_PLACES=266, PETRI_TRANSITIONS=342} [2024-06-27 18:14:52,063 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 210 predicate places. [2024-06-27 18:14:52,063 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 342 transitions, 2891 flow [2024-06-27 18:14:52,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:52,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:52,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:52,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 18:14:52,064 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:52,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash -396422315, now seen corresponding path program 1 times [2024-06-27 18:14:52,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:52,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824065867] [2024-06-27 18:14:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:52,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:53,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:53,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824065867] [2024-06-27 18:14:53,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824065867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:53,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:53,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:14:53,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438891951] [2024-06-27 18:14:53,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:53,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:14:53,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:14:53,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:14:53,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:14:53,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 342 transitions, 2891 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:53,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:53,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:14:53,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:14:55,386 INFO L124 PetriNetUnfolderBase]: 6565/10648 cut-off events. [2024-06-27 18:14:55,387 INFO L125 PetriNetUnfolderBase]: For 1107500/1107538 co-relation queries the response was YES. [2024-06-27 18:14:55,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81383 conditions, 10648 events. 6565/10648 cut-off events. For 1107500/1107538 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 72687 event pairs, 1827 based on Foata normal form. 15/10377 useless extension candidates. Maximal degree in co-relation 81260. Up to 9016 conditions per place. [2024-06-27 18:14:55,577 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 310 selfloop transitions, 20 changer transitions 0/382 dead transitions. [2024-06-27 18:14:55,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 382 transitions, 3719 flow [2024-06-27 18:14:55,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:14:55,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:14:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 18:14:55,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175 [2024-06-27 18:14:55,579 INFO L175 Difference]: Start difference. First operand has 266 places, 342 transitions, 2891 flow. Second operand 8 states and 207 transitions. [2024-06-27 18:14:55,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 382 transitions, 3719 flow [2024-06-27 18:14:57,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 382 transitions, 3599 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 18:14:57,027 INFO L231 Difference]: Finished difference. Result has 268 places, 345 transitions, 2881 flow [2024-06-27 18:14:57,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2881, PETRI_PLACES=268, PETRI_TRANSITIONS=345} [2024-06-27 18:14:57,028 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 212 predicate places. [2024-06-27 18:14:57,028 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 345 transitions, 2881 flow [2024-06-27 18:14:57,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:57,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:14:57,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:14:57,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 18:14:57,029 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:14:57,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:14:57,029 INFO L85 PathProgramCache]: Analyzing trace with hash -389722832, now seen corresponding path program 1 times [2024-06-27 18:14:57,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:14:57,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366769294] [2024-06-27 18:14:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:14:57,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:14:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:14:57,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:14:57,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:14:57,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366769294] [2024-06-27 18:14:57,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366769294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:14:57,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:14:57,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:14:57,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608811522] [2024-06-27 18:14:57,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:14:57,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:14:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:14:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:14:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:14:57,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:14:57,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 345 transitions, 2881 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:14:57,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:14:57,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:14:57,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:00,029 INFO L124 PetriNetUnfolderBase]: 7174/11406 cut-off events. [2024-06-27 18:15:00,030 INFO L125 PetriNetUnfolderBase]: For 1147518/1147533 co-relation queries the response was YES. [2024-06-27 18:15:00,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86407 conditions, 11406 events. 7174/11406 cut-off events. For 1147518/1147533 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 76322 event pairs, 1928 based on Foata normal form. 13/11183 useless extension candidates. Maximal degree in co-relation 86283. Up to 9951 conditions per place. [2024-06-27 18:15:00,200 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 333 selfloop transitions, 24 changer transitions 0/385 dead transitions. [2024-06-27 18:15:00,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 385 transitions, 3851 flow [2024-06-27 18:15:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:00,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:00,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:15:00,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-06-27 18:15:00,201 INFO L175 Difference]: Start difference. First operand has 268 places, 345 transitions, 2881 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:15:00,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 385 transitions, 3851 flow [2024-06-27 18:15:01,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 385 transitions, 3763 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:01,828 INFO L231 Difference]: Finished difference. Result has 271 places, 356 transitions, 3060 flow [2024-06-27 18:15:01,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3060, PETRI_PLACES=271, PETRI_TRANSITIONS=356} [2024-06-27 18:15:01,829 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 215 predicate places. [2024-06-27 18:15:01,829 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 356 transitions, 3060 flow [2024-06-27 18:15:01,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:01,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:01,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:01,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 18:15:01,830 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:01,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:01,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1094440282, now seen corresponding path program 2 times [2024-06-27 18:15:01,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:01,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422162353] [2024-06-27 18:15:01,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:01,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:02,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:02,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422162353] [2024-06-27 18:15:02,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422162353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:02,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:02,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:15:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44320230] [2024-06-27 18:15:02,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:02,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:15:02,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:15:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:15:02,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:15:02,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 356 transitions, 3060 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:02,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:02,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:15:02,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:05,082 INFO L124 PetriNetUnfolderBase]: 7211/11460 cut-off events. [2024-06-27 18:15:05,082 INFO L125 PetriNetUnfolderBase]: For 1186580/1186593 co-relation queries the response was YES. [2024-06-27 18:15:05,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88932 conditions, 11460 events. 7211/11460 cut-off events. For 1186580/1186593 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 76724 event pairs, 1924 based on Foata normal form. 11/11223 useless extension candidates. Maximal degree in co-relation 88805. Up to 9971 conditions per place. [2024-06-27 18:15:05,290 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 331 selfloop transitions, 32 changer transitions 0/391 dead transitions. [2024-06-27 18:15:05,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 391 transitions, 4234 flow [2024-06-27 18:15:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:15:05,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:15:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 18:15:05,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057142857142857 [2024-06-27 18:15:05,291 INFO L175 Difference]: Start difference. First operand has 271 places, 356 transitions, 3060 flow. Second operand 7 states and 177 transitions. [2024-06-27 18:15:05,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 391 transitions, 4234 flow [2024-06-27 18:15:06,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 391 transitions, 4109 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 18:15:06,537 INFO L231 Difference]: Finished difference. Result has 275 places, 362 transitions, 3183 flow [2024-06-27 18:15:06,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2935, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3183, PETRI_PLACES=275, PETRI_TRANSITIONS=362} [2024-06-27 18:15:06,538 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 219 predicate places. [2024-06-27 18:15:06,538 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 362 transitions, 3183 flow [2024-06-27 18:15:06,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:06,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:06,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:06,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 18:15:06,538 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:06,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:06,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1217949550, now seen corresponding path program 5 times [2024-06-27 18:15:06,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:06,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682508009] [2024-06-27 18:15:06,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:06,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:07,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:07,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682508009] [2024-06-27 18:15:07,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682508009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:07,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:07,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:15:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116971954] [2024-06-27 18:15:07,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:07,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:15:07,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:15:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:15:07,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:15:07,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 362 transitions, 3183 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:07,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:07,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:15:07,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:10,844 INFO L124 PetriNetUnfolderBase]: 7583/12005 cut-off events. [2024-06-27 18:15:10,845 INFO L125 PetriNetUnfolderBase]: For 1239106/1239115 co-relation queries the response was YES. [2024-06-27 18:15:11,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93238 conditions, 12005 events. 7583/12005 cut-off events. For 1239106/1239115 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 79975 event pairs, 1944 based on Foata normal form. 10/11785 useless extension candidates. Maximal degree in co-relation 93110. Up to 10368 conditions per place. [2024-06-27 18:15:11,088 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 343 selfloop transitions, 73 changer transitions 0/426 dead transitions. [2024-06-27 18:15:11,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 426 transitions, 4339 flow [2024-06-27 18:15:11,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:15:11,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:15:11,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-27 18:15:11,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-06-27 18:15:11,090 INFO L175 Difference]: Start difference. First operand has 275 places, 362 transitions, 3183 flow. Second operand 10 states and 256 transitions. [2024-06-27 18:15:11,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 426 transitions, 4339 flow [2024-06-27 18:15:12,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 426 transitions, 4220 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 18:15:12,988 INFO L231 Difference]: Finished difference. Result has 282 places, 364 transitions, 3307 flow [2024-06-27 18:15:12,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3064, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3307, PETRI_PLACES=282, PETRI_TRANSITIONS=364} [2024-06-27 18:15:12,989 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 226 predicate places. [2024-06-27 18:15:12,989 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 364 transitions, 3307 flow [2024-06-27 18:15:12,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:12,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:12,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:12,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 18:15:12,990 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:12,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash 175148752, now seen corresponding path program 2 times [2024-06-27 18:15:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:12,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335482343] [2024-06-27 18:15:12,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:14,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:14,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:14,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335482343] [2024-06-27 18:15:14,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335482343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:14,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:14,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:15:14,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208249609] [2024-06-27 18:15:14,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:14,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:15:14,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:14,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:15:14,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:15:14,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:15:14,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 364 transitions, 3307 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:14,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:14,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:15:14,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:17,426 INFO L124 PetriNetUnfolderBase]: 7643/12074 cut-off events. [2024-06-27 18:15:17,427 INFO L125 PetriNetUnfolderBase]: For 1272361/1272370 co-relation queries the response was YES. [2024-06-27 18:15:17,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94793 conditions, 12074 events. 7643/12074 cut-off events. For 1272361/1272370 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 80318 event pairs, 1859 based on Foata normal form. 6/11855 useless extension candidates. Maximal degree in co-relation 94663. Up to 10253 conditions per place. [2024-06-27 18:15:17,680 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 345 selfloop transitions, 80 changer transitions 0/435 dead transitions. [2024-06-27 18:15:17,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 435 transitions, 4524 flow [2024-06-27 18:15:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:15:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:15:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 18:15:17,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-06-27 18:15:17,682 INFO L175 Difference]: Start difference. First operand has 282 places, 364 transitions, 3307 flow. Second operand 10 states and 259 transitions. [2024-06-27 18:15:17,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 435 transitions, 4524 flow [2024-06-27 18:15:20,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 435 transitions, 4299 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-27 18:15:20,102 INFO L231 Difference]: Finished difference. Result has 285 places, 370 transitions, 3360 flow [2024-06-27 18:15:20,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3082, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3360, PETRI_PLACES=285, PETRI_TRANSITIONS=370} [2024-06-27 18:15:20,102 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 229 predicate places. [2024-06-27 18:15:20,102 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 370 transitions, 3360 flow [2024-06-27 18:15:20,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:20,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:20,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:20,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 18:15:20,103 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:20,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:20,104 INFO L85 PathProgramCache]: Analyzing trace with hash -46496288, now seen corresponding path program 3 times [2024-06-27 18:15:20,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:20,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440175863] [2024-06-27 18:15:20,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:20,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:21,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:21,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440175863] [2024-06-27 18:15:21,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440175863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:21,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:21,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:15:21,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699946488] [2024-06-27 18:15:21,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:21,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:15:21,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:21,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:15:21,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:15:21,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:15:21,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 370 transitions, 3360 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:21,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:21,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:15:21,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:24,397 INFO L124 PetriNetUnfolderBase]: 7680/12147 cut-off events. [2024-06-27 18:15:24,398 INFO L125 PetriNetUnfolderBase]: For 1301143/1301152 co-relation queries the response was YES. [2024-06-27 18:15:24,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96337 conditions, 12147 events. 7680/12147 cut-off events. For 1301143/1301152 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 80885 event pairs, 1867 based on Foata normal form. 6/11923 useless extension candidates. Maximal degree in co-relation 96205. Up to 10308 conditions per place. [2024-06-27 18:15:24,738 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 348 selfloop transitions, 81 changer transitions 0/439 dead transitions. [2024-06-27 18:15:24,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 439 transitions, 4584 flow [2024-06-27 18:15:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:15:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:15:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 260 transitions. [2024-06-27 18:15:24,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-27 18:15:24,740 INFO L175 Difference]: Start difference. First operand has 285 places, 370 transitions, 3360 flow. Second operand 10 states and 260 transitions. [2024-06-27 18:15:24,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 439 transitions, 4584 flow [2024-06-27 18:15:26,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 439 transitions, 4353 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 18:15:26,326 INFO L231 Difference]: Finished difference. Result has 289 places, 375 transitions, 3410 flow [2024-06-27 18:15:26,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3410, PETRI_PLACES=289, PETRI_TRANSITIONS=375} [2024-06-27 18:15:26,326 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 233 predicate places. [2024-06-27 18:15:26,327 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 375 transitions, 3410 flow [2024-06-27 18:15:26,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:26,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:26,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:26,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 18:15:26,327 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:26,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:26,328 INFO L85 PathProgramCache]: Analyzing trace with hash -86702500, now seen corresponding path program 4 times [2024-06-27 18:15:26,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:26,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317691171] [2024-06-27 18:15:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:26,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:27,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:27,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317691171] [2024-06-27 18:15:27,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317691171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:27,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:27,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:15:27,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938167335] [2024-06-27 18:15:27,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:27,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:15:27,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:15:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:15:27,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:15:27,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 375 transitions, 3410 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:27,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:27,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:15:27,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:31,222 INFO L124 PetriNetUnfolderBase]: 7717/12220 cut-off events. [2024-06-27 18:15:31,222 INFO L125 PetriNetUnfolderBase]: For 1332632/1332641 co-relation queries the response was YES. [2024-06-27 18:15:31,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97827 conditions, 12220 events. 7717/12220 cut-off events. For 1332632/1332641 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 81677 event pairs, 1898 based on Foata normal form. 6/11996 useless extension candidates. Maximal degree in co-relation 97693. Up to 10363 conditions per place. [2024-06-27 18:15:31,515 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 347 selfloop transitions, 86 changer transitions 0/443 dead transitions. [2024-06-27 18:15:31,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 443 transitions, 4642 flow [2024-06-27 18:15:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:15:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:15:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-27 18:15:31,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516 [2024-06-27 18:15:31,517 INFO L175 Difference]: Start difference. First operand has 289 places, 375 transitions, 3410 flow. Second operand 10 states and 258 transitions. [2024-06-27 18:15:31,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 443 transitions, 4642 flow [2024-06-27 18:15:34,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 443 transitions, 4403 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 18:15:34,284 INFO L231 Difference]: Finished difference. Result has 292 places, 379 transitions, 3454 flow [2024-06-27 18:15:34,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3175, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3454, PETRI_PLACES=292, PETRI_TRANSITIONS=379} [2024-06-27 18:15:34,285 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 236 predicate places. [2024-06-27 18:15:34,285 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 379 transitions, 3454 flow [2024-06-27 18:15:34,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:34,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:34,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:34,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 18:15:34,286 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:34,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:34,286 INFO L85 PathProgramCache]: Analyzing trace with hash -981282282, now seen corresponding path program 5 times [2024-06-27 18:15:34,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:34,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207799245] [2024-06-27 18:15:34,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:34,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:35,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:35,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207799245] [2024-06-27 18:15:35,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207799245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:35,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:35,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:15:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670746153] [2024-06-27 18:15:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:35,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:15:35,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:15:35,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:15:35,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:15:35,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 379 transitions, 3454 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:35,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:35,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:15:35,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:38,902 INFO L124 PetriNetUnfolderBase]: 7754/12307 cut-off events. [2024-06-27 18:15:38,903 INFO L125 PetriNetUnfolderBase]: For 1363601/1363610 co-relation queries the response was YES. [2024-06-27 18:15:39,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98752 conditions, 12307 events. 7754/12307 cut-off events. For 1363601/1363610 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 82491 event pairs, 1863 based on Foata normal form. 6/12075 useless extension candidates. Maximal degree in co-relation 98617. Up to 10239 conditions per place. [2024-06-27 18:15:39,184 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 341 selfloop transitions, 95 changer transitions 0/446 dead transitions. [2024-06-27 18:15:39,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 446 transitions, 4678 flow [2024-06-27 18:15:39,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:15:39,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:15:39,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 259 transitions. [2024-06-27 18:15:39,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.518 [2024-06-27 18:15:39,186 INFO L175 Difference]: Start difference. First operand has 292 places, 379 transitions, 3454 flow. Second operand 10 states and 259 transitions. [2024-06-27 18:15:39,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 446 transitions, 4678 flow [2024-06-27 18:15:42,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 446 transitions, 4452 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:42,719 INFO L231 Difference]: Finished difference. Result has 296 places, 381 transitions, 3513 flow [2024-06-27 18:15:42,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3228, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3513, PETRI_PLACES=296, PETRI_TRANSITIONS=381} [2024-06-27 18:15:42,720 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 240 predicate places. [2024-06-27 18:15:42,720 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 381 transitions, 3513 flow [2024-06-27 18:15:42,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:42,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:42,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:42,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 18:15:42,721 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:42,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1094434795, now seen corresponding path program 2 times [2024-06-27 18:15:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:42,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905058637] [2024-06-27 18:15:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:42,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:44,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:44,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905058637] [2024-06-27 18:15:44,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905058637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:44,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:44,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:15:44,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568799206] [2024-06-27 18:15:44,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:44,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:15:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:15:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:15:44,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:15:44,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 381 transitions, 3513 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:44,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:44,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:15:44,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:47,613 INFO L124 PetriNetUnfolderBase]: 6831/11092 cut-off events. [2024-06-27 18:15:47,613 INFO L125 PetriNetUnfolderBase]: For 1350655/1350691 co-relation queries the response was YES. [2024-06-27 18:15:47,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92052 conditions, 11092 events. 6831/11092 cut-off events. For 1350655/1350691 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 76130 event pairs, 1832 based on Foata normal form. 13/10795 useless extension candidates. Maximal degree in co-relation 91916. Up to 9366 conditions per place. [2024-06-27 18:15:47,913 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 334 selfloop transitions, 25 changer transitions 0/417 dead transitions. [2024-06-27 18:15:47,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 417 transitions, 4425 flow [2024-06-27 18:15:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:15:47,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:15:47,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 18:15:47,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 18:15:47,915 INFO L175 Difference]: Start difference. First operand has 296 places, 381 transitions, 3513 flow. Second operand 8 states and 204 transitions. [2024-06-27 18:15:47,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 417 transitions, 4425 flow [2024-06-27 18:15:51,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 417 transitions, 4158 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 18:15:51,899 INFO L231 Difference]: Finished difference. Result has 296 places, 384 transitions, 3380 flow [2024-06-27 18:15:51,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3246, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3380, PETRI_PLACES=296, PETRI_TRANSITIONS=384} [2024-06-27 18:15:51,900 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 240 predicate places. [2024-06-27 18:15:51,900 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 384 transitions, 3380 flow [2024-06-27 18:15:51,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:51,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:51,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:51,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 18:15:51,900 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:51,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1874850198, now seen corresponding path program 3 times [2024-06-27 18:15:51,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:51,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175358939] [2024-06-27 18:15:51,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:51,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:15:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:15:52,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:15:52,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175358939] [2024-06-27 18:15:52,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175358939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:15:52,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:15:52,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:15:52,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716941701] [2024-06-27 18:15:52,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:15:52,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:15:52,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:15:52,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:15:52,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:15:53,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:15:53,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 384 transitions, 3380 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:53,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:15:53,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:15:53,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:15:55,818 INFO L124 PetriNetUnfolderBase]: 6848/11134 cut-off events. [2024-06-27 18:15:55,818 INFO L125 PetriNetUnfolderBase]: For 1373365/1373401 co-relation queries the response was YES. [2024-06-27 18:15:56,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92333 conditions, 11134 events. 6848/11134 cut-off events. For 1373365/1373401 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 76660 event pairs, 1830 based on Foata normal form. 15/10837 useless extension candidates. Maximal degree in co-relation 92196. Up to 9341 conditions per place. [2024-06-27 18:15:56,133 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 327 selfloop transitions, 35 changer transitions 0/420 dead transitions. [2024-06-27 18:15:56,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 420 transitions, 4314 flow [2024-06-27 18:15:56,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:15:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:15:56,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 18:15:56,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515 [2024-06-27 18:15:56,135 INFO L175 Difference]: Start difference. First operand has 296 places, 384 transitions, 3380 flow. Second operand 8 states and 206 transitions. [2024-06-27 18:15:56,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 420 transitions, 4314 flow [2024-06-27 18:15:59,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 420 transitions, 4202 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 18:15:59,732 INFO L231 Difference]: Finished difference. Result has 298 places, 387 transitions, 3438 flow [2024-06-27 18:15:59,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3268, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3438, PETRI_PLACES=298, PETRI_TRANSITIONS=387} [2024-06-27 18:15:59,733 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 242 predicate places. [2024-06-27 18:15:59,733 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 387 transitions, 3438 flow [2024-06-27 18:15:59,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:15:59,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:15:59,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:15:59,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 18:15:59,734 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:15:59,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:15:59,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1094449675, now seen corresponding path program 3 times [2024-06-27 18:15:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:15:59,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649679000] [2024-06-27 18:15:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:15:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:15:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:01,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:01,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:01,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649679000] [2024-06-27 18:16:01,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649679000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:01,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:01,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:01,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482167809] [2024-06-27 18:16:01,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:01,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:01,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:01,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:01,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:01,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 50 [2024-06-27 18:16:01,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 387 transitions, 3438 flow. Second operand has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:01,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:01,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 50 [2024-06-27 18:16:01,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:03,501 INFO L124 PetriNetUnfolderBase]: 6865/11146 cut-off events. [2024-06-27 18:16:03,501 INFO L125 PetriNetUnfolderBase]: For 1404673/1404711 co-relation queries the response was YES. [2024-06-27 18:16:03,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93534 conditions, 11146 events. 6865/11146 cut-off events. For 1404673/1404711 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 76632 event pairs, 1830 based on Foata normal form. 13/10848 useless extension candidates. Maximal degree in co-relation 93396. Up to 9379 conditions per place. [2024-06-27 18:16:03,689 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 332 selfloop transitions, 33 changer transitions 0/423 dead transitions. [2024-06-27 18:16:03,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 423 transitions, 4370 flow [2024-06-27 18:16:03,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:03,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:03,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 18:16:03,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-06-27 18:16:03,691 INFO L175 Difference]: Start difference. First operand has 298 places, 387 transitions, 3438 flow. Second operand 8 states and 205 transitions. [2024-06-27 18:16:03,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 423 transitions, 4370 flow [2024-06-27 18:16:06,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 423 transitions, 4222 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:06,337 INFO L231 Difference]: Finished difference. Result has 300 places, 390 transitions, 3448 flow [2024-06-27 18:16:06,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3290, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3448, PETRI_PLACES=300, PETRI_TRANSITIONS=390} [2024-06-27 18:16:06,338 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 244 predicate places. [2024-06-27 18:16:06,338 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 390 transitions, 3448 flow [2024-06-27 18:16:06,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.666666666666668) internal successors, (150), 9 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:06,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:06,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:06,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 18:16:06,339 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:06,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:06,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1094450202, now seen corresponding path program 1 times [2024-06-27 18:16:06,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:06,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465169301] [2024-06-27 18:16:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:06,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:07,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:07,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465169301] [2024-06-27 18:16:07,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465169301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:07,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:07,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 18:16:07,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489279713] [2024-06-27 18:16:07,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:07,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 18:16:07,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:07,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 18:16:07,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 18:16:07,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-27 18:16:07,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 390 transitions, 3448 flow. Second operand has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:07,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:07,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-27 18:16:07,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:09,676 INFO L124 PetriNetUnfolderBase]: 6552/10728 cut-off events. [2024-06-27 18:16:09,676 INFO L125 PetriNetUnfolderBase]: For 1424148/1424217 co-relation queries the response was YES. [2024-06-27 18:16:09,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91267 conditions, 10728 events. 6552/10728 cut-off events. For 1424148/1424217 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 74482 event pairs, 1788 based on Foata normal form. 28/10389 useless extension candidates. Maximal degree in co-relation 91128. Up to 8787 conditions per place. [2024-06-27 18:16:09,865 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 323 selfloop transitions, 19 changer transitions 0/427 dead transitions. [2024-06-27 18:16:09,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 427 transitions, 4336 flow [2024-06-27 18:16:09,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 18:16:09,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 18:16:09,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 18:16:09,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 18:16:09,867 INFO L175 Difference]: Start difference. First operand has 300 places, 390 transitions, 3448 flow. Second operand 8 states and 210 transitions. [2024-06-27 18:16:09,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 427 transitions, 4336 flow [2024-06-27 18:16:12,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 427 transitions, 4200 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:12,493 INFO L231 Difference]: Finished difference. Result has 302 places, 393 transitions, 3440 flow [2024-06-27 18:16:12,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3440, PETRI_PLACES=302, PETRI_TRANSITIONS=393} [2024-06-27 18:16:12,494 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 246 predicate places. [2024-06-27 18:16:12,494 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 393 transitions, 3440 flow [2024-06-27 18:16:12,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.666666666666668) internal successors, (159), 9 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:12,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:12,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:12,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 18:16:12,494 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:12,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -180754150, now seen corresponding path program 3 times [2024-06-27 18:16:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:12,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355749130] [2024-06-27 18:16:12,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:12,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355749130] [2024-06-27 18:16:13,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355749130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:13,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:13,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:13,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821722108] [2024-06-27 18:16:13,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:13,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:13,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:13,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:13,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:13,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:16:13,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 393 transitions, 3440 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:13,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:13,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:16:13,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:16,406 INFO L124 PetriNetUnfolderBase]: 7502/11988 cut-off events. [2024-06-27 18:16:16,406 INFO L125 PetriNetUnfolderBase]: For 1470133/1470162 co-relation queries the response was YES. [2024-06-27 18:16:16,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99372 conditions, 11988 events. 7502/11988 cut-off events. For 1470133/1470162 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 81328 event pairs, 1977 based on Foata normal form. 23/11767 useless extension candidates. Maximal degree in co-relation 99232. Up to 10378 conditions per place. [2024-06-27 18:16:16,709 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 358 selfloop transitions, 24 changer transitions 0/419 dead transitions. [2024-06-27 18:16:16,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 419 transitions, 4280 flow [2024-06-27 18:16:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:16:16,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-06-27 18:16:16,711 INFO L175 Difference]: Start difference. First operand has 302 places, 393 transitions, 3440 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:16:16,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 419 transitions, 4280 flow [2024-06-27 18:16:20,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 419 transitions, 4124 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:20,833 INFO L231 Difference]: Finished difference. Result has 303 places, 393 transitions, 3338 flow [2024-06-27 18:16:20,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3338, PETRI_PLACES=303, PETRI_TRANSITIONS=393} [2024-06-27 18:16:20,834 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 247 predicate places. [2024-06-27 18:16:20,834 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 393 transitions, 3338 flow [2024-06-27 18:16:20,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:20,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:20,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:20,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 18:16:20,835 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:20,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:20,835 INFO L85 PathProgramCache]: Analyzing trace with hash -118907762, now seen corresponding path program 4 times [2024-06-27 18:16:20,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:20,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116203094] [2024-06-27 18:16:20,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:20,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:22,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:22,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116203094] [2024-06-27 18:16:22,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116203094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:22,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:22,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:22,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908314528] [2024-06-27 18:16:22,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:22,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:22,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:22,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:16:22,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 393 transitions, 3338 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:22,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:22,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:16:22,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:25,094 INFO L124 PetriNetUnfolderBase]: 7519/12011 cut-off events. [2024-06-27 18:16:25,094 INFO L125 PetriNetUnfolderBase]: For 1492125/1492154 co-relation queries the response was YES. [2024-06-27 18:16:25,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99424 conditions, 12011 events. 7519/12011 cut-off events. For 1492125/1492154 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 81487 event pairs, 1971 based on Foata normal form. 23/11790 useless extension candidates. Maximal degree in co-relation 99283. Up to 10372 conditions per place. [2024-06-27 18:16:25,378 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 352 selfloop transitions, 32 changer transitions 0/421 dead transitions. [2024-06-27 18:16:25,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 421 transitions, 4292 flow [2024-06-27 18:16:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:25,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:25,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:16:25,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-06-27 18:16:25,380 INFO L175 Difference]: Start difference. First operand has 303 places, 393 transitions, 3338 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:16:25,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 421 transitions, 4292 flow [2024-06-27 18:16:29,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 421 transitions, 4217 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:29,420 INFO L231 Difference]: Finished difference. Result has 304 places, 396 transitions, 3437 flow [2024-06-27 18:16:29,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3263, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3437, PETRI_PLACES=304, PETRI_TRANSITIONS=396} [2024-06-27 18:16:29,420 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 248 predicate places. [2024-06-27 18:16:29,421 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 396 transitions, 3437 flow [2024-06-27 18:16:29,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:29,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:29,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:29,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 18:16:29,421 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:29,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1965830554, now seen corresponding path program 5 times [2024-06-27 18:16:29,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:29,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598983414] [2024-06-27 18:16:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:29,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:30,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:30,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598983414] [2024-06-27 18:16:30,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598983414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:30,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:30,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:30,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395011967] [2024-06-27 18:16:30,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:30,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:30,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:30,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:30,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:30,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:16:30,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 396 transitions, 3437 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:30,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:30,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:16:30,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:33,411 INFO L124 PetriNetUnfolderBase]: 7532/12247 cut-off events. [2024-06-27 18:16:33,411 INFO L125 PetriNetUnfolderBase]: For 1529537/1529573 co-relation queries the response was YES. [2024-06-27 18:16:33,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100999 conditions, 12247 events. 7532/12247 cut-off events. For 1529537/1529573 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 85089 event pairs, 1946 based on Foata normal form. 27/11964 useless extension candidates. Maximal degree in co-relation 100857. Up to 10322 conditions per place. [2024-06-27 18:16:33,739 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 341 selfloop transitions, 49 changer transitions 0/427 dead transitions. [2024-06-27 18:16:33,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 427 transitions, 4729 flow [2024-06-27 18:16:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-27 18:16:33,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2024-06-27 18:16:33,740 INFO L175 Difference]: Start difference. First operand has 304 places, 396 transitions, 3437 flow. Second operand 7 states and 174 transitions. [2024-06-27 18:16:33,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 427 transitions, 4729 flow [2024-06-27 18:16:36,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 427 transitions, 4577 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-27 18:16:36,117 INFO L231 Difference]: Finished difference. Result has 306 places, 402 transitions, 3603 flow [2024-06-27 18:16:36,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3285, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3603, PETRI_PLACES=306, PETRI_TRANSITIONS=402} [2024-06-27 18:16:36,117 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 250 predicate places. [2024-06-27 18:16:36,117 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 402 transitions, 3603 flow [2024-06-27 18:16:36,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:36,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:36,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:36,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 18:16:36,118 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:36,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:36,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1966039804, now seen corresponding path program 6 times [2024-06-27 18:16:36,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:36,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748450858] [2024-06-27 18:16:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:36,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748450858] [2024-06-27 18:16:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748450858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:37,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 18:16:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089406893] [2024-06-27 18:16:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:37,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 18:16:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 18:16:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 18:16:37,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 50 [2024-06-27 18:16:37,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 402 transitions, 3603 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:37,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:37,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 50 [2024-06-27 18:16:37,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:39,823 INFO L124 PetriNetUnfolderBase]: 7529/12243 cut-off events. [2024-06-27 18:16:39,823 INFO L125 PetriNetUnfolderBase]: For 1558900/1558936 co-relation queries the response was YES. [2024-06-27 18:16:39,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101737 conditions, 12243 events. 7529/12243 cut-off events. For 1558900/1558936 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 85146 event pairs, 1946 based on Foata normal form. 27/11960 useless extension candidates. Maximal degree in co-relation 101594. Up to 10319 conditions per place. [2024-06-27 18:16:40,006 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 340 selfloop transitions, 49 changer transitions 0/426 dead transitions. [2024-06-27 18:16:40,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 426 transitions, 4481 flow [2024-06-27 18:16:40,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 18:16:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 18:16:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 18:16:40,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4942857142857143 [2024-06-27 18:16:40,008 INFO L175 Difference]: Start difference. First operand has 306 places, 402 transitions, 3603 flow. Second operand 7 states and 173 transitions. [2024-06-27 18:16:40,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 426 transitions, 4481 flow [2024-06-27 18:16:42,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 426 transitions, 4223 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-27 18:16:42,612 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 3449 flow [2024-06-27 18:16:42,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3449, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-06-27 18:16:42,612 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 253 predicate places. [2024-06-27 18:16:42,612 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 3449 flow [2024-06-27 18:16:42,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:42,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:42,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:42,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 18:16:42,613 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:42,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:42,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2069451600, now seen corresponding path program 6 times [2024-06-27 18:16:42,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:42,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614988768] [2024-06-27 18:16:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:42,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:43,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:43,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614988768] [2024-06-27 18:16:43,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614988768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:43,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:43,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:16:43,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525748610] [2024-06-27 18:16:43,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:43,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:16:43,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:43,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:16:43,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:16:43,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:16:43,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 3449 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:43,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:43,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:16:43,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:47,032 INFO L124 PetriNetUnfolderBase]: 7881/12507 cut-off events. [2024-06-27 18:16:47,032 INFO L125 PetriNetUnfolderBase]: For 1576543/1576555 co-relation queries the response was YES. [2024-06-27 18:16:47,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103827 conditions, 12507 events. 7881/12507 cut-off events. For 1576543/1576555 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 84119 event pairs, 1995 based on Foata normal form. 7/12265 useless extension candidates. Maximal degree in co-relation 103683. Up to 10791 conditions per place. [2024-06-27 18:16:47,214 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 379 selfloop transitions, 73 changer transitions 0/462 dead transitions. [2024-06-27 18:16:47,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 462 transitions, 4665 flow [2024-06-27 18:16:47,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:16:47,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:16:47,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-27 18:16:47,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506 [2024-06-27 18:16:47,215 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 3449 flow. Second operand 10 states and 253 transitions. [2024-06-27 18:16:47,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 462 transitions, 4665 flow [2024-06-27 18:16:49,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 462 transitions, 4547 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 18:16:49,891 INFO L231 Difference]: Finished difference. Result has 313 places, 404 transitions, 3588 flow [2024-06-27 18:16:49,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3588, PETRI_PLACES=313, PETRI_TRANSITIONS=404} [2024-06-27 18:16:49,892 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 257 predicate places. [2024-06-27 18:16:49,892 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 404 transitions, 3588 flow [2024-06-27 18:16:49,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:49,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:49,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:49,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 18:16:49,893 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:49,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:49,893 INFO L85 PathProgramCache]: Analyzing trace with hash 590825410, now seen corresponding path program 6 times [2024-06-27 18:16:49,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:49,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327522981] [2024-06-27 18:16:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:49,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:51,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:51,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327522981] [2024-06-27 18:16:51,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327522981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:51,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:51,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:16:51,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010117768] [2024-06-27 18:16:51,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:51,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:16:51,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:16:51,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:16:51,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:16:51,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 404 transitions, 3588 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:51,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:51,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:16:51,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:16:54,856 INFO L124 PetriNetUnfolderBase]: 7941/12591 cut-off events. [2024-06-27 18:16:54,857 INFO L125 PetriNetUnfolderBase]: For 1616762/1616783 co-relation queries the response was YES. [2024-06-27 18:16:55,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105523 conditions, 12591 events. 7941/12591 cut-off events. For 1616762/1616783 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 84620 event pairs, 1929 based on Foata normal form. 13/12359 useless extension candidates. Maximal degree in co-relation 105378. Up to 10668 conditions per place. [2024-06-27 18:16:55,089 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 375 selfloop transitions, 86 changer transitions 0/471 dead transitions. [2024-06-27 18:16:55,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 471 transitions, 4885 flow [2024-06-27 18:16:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:16:55,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:16:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-27 18:16:55,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514 [2024-06-27 18:16:55,090 INFO L175 Difference]: Start difference. First operand has 313 places, 404 transitions, 3588 flow. Second operand 10 states and 257 transitions. [2024-06-27 18:16:55,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 471 transitions, 4885 flow [2024-06-27 18:16:58,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 471 transitions, 4646 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-27 18:16:58,042 INFO L231 Difference]: Finished difference. Result has 316 places, 410 transitions, 3665 flow [2024-06-27 18:16:58,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3349, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3665, PETRI_PLACES=316, PETRI_TRANSITIONS=410} [2024-06-27 18:16:58,043 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 260 predicate places. [2024-06-27 18:16:58,043 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 410 transitions, 3665 flow [2024-06-27 18:16:58,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:58,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:16:58,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:16:58,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 18:16:58,044 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:16:58,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:16:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash 836977174, now seen corresponding path program 7 times [2024-06-27 18:16:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:16:58,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560294230] [2024-06-27 18:16:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:16:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:16:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:16:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:16:59,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:16:59,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560294230] [2024-06-27 18:16:59,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560294230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:16:59,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:16:59,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:16:59,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076758383] [2024-06-27 18:16:59,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:16:59,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:16:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:16:59,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:16:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:16:59,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:16:59,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 410 transitions, 3665 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:16:59,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:16:59,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:16:59,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:02,801 INFO L124 PetriNetUnfolderBase]: 8046/12753 cut-off events. [2024-06-27 18:17:02,802 INFO L125 PetriNetUnfolderBase]: For 1676034/1676055 co-relation queries the response was YES. [2024-06-27 18:17:02,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108579 conditions, 12753 events. 8046/12753 cut-off events. For 1676034/1676055 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 85770 event pairs, 1910 based on Foata normal form. 13/12518 useless extension candidates. Maximal degree in co-relation 108432. Up to 10731 conditions per place. [2024-06-27 18:17:02,986 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 368 selfloop transitions, 108 changer transitions 0/486 dead transitions. [2024-06-27 18:17:02,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 486 transitions, 5500 flow [2024-06-27 18:17:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:17:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:17:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-27 18:17:02,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514 [2024-06-27 18:17:02,987 INFO L175 Difference]: Start difference. First operand has 316 places, 410 transitions, 3665 flow. Second operand 10 states and 257 transitions. [2024-06-27 18:17:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 486 transitions, 5500 flow [2024-06-27 18:17:06,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 486 transitions, 5217 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:06,379 INFO L231 Difference]: Finished difference. Result has 320 places, 424 transitions, 3938 flow [2024-06-27 18:17:06,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3400, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3938, PETRI_PLACES=320, PETRI_TRANSITIONS=424} [2024-06-27 18:17:06,380 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 264 predicate places. [2024-06-27 18:17:06,380 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 424 transitions, 3938 flow [2024-06-27 18:17:06,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:06,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:06,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:06,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 18:17:06,381 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:06,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 369180370, now seen corresponding path program 8 times [2024-06-27 18:17:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:06,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235438633] [2024-06-27 18:17:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:06,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:07,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:07,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:07,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235438633] [2024-06-27 18:17:07,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235438633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:07,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:07,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:17:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164651743] [2024-06-27 18:17:07,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:07,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:17:07,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:07,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:17:07,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:17:07,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:17:07,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 424 transitions, 3938 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:07,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:07,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:17:07,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:11,241 INFO L124 PetriNetUnfolderBase]: 8083/12841 cut-off events. [2024-06-27 18:17:11,241 INFO L125 PetriNetUnfolderBase]: For 1714679/1714700 co-relation queries the response was YES. [2024-06-27 18:17:11,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110359 conditions, 12841 events. 8083/12841 cut-off events. For 1714679/1714700 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 86736 event pairs, 1937 based on Foata normal form. 13/12598 useless extension candidates. Maximal degree in co-relation 110210. Up to 10869 conditions per place. [2024-06-27 18:17:11,434 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 378 selfloop transitions, 98 changer transitions 0/486 dead transitions. [2024-06-27 18:17:11,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 486 transitions, 5237 flow [2024-06-27 18:17:11,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:17:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:17:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-27 18:17:11,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-06-27 18:17:11,436 INFO L175 Difference]: Start difference. First operand has 320 places, 424 transitions, 3938 flow. Second operand 10 states and 255 transitions. [2024-06-27 18:17:11,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 486 transitions, 5237 flow [2024-06-27 18:17:14,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 486 transitions, 5071 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 18:17:14,383 INFO L231 Difference]: Finished difference. Result has 328 places, 427 transitions, 4102 flow [2024-06-27 18:17:14,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4102, PETRI_PLACES=328, PETRI_TRANSITIONS=427} [2024-06-27 18:17:14,391 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 272 predicate places. [2024-06-27 18:17:14,391 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 427 transitions, 4102 flow [2024-06-27 18:17:14,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:14,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:14,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:14,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 18:17:14,392 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:14,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash 598868980, now seen corresponding path program 9 times [2024-06-27 18:17:14,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:14,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339929244] [2024-06-27 18:17:14,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:14,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:14,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:15,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:15,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339929244] [2024-06-27 18:17:15,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339929244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:15,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:15,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:17:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239873162] [2024-06-27 18:17:15,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:15,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:17:15,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:17:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:17:15,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:17:15,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 427 transitions, 4102 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:15,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:15,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:17:15,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:19,229 INFO L124 PetriNetUnfolderBase]: 8120/12904 cut-off events. [2024-06-27 18:17:19,230 INFO L125 PetriNetUnfolderBase]: For 1739841/1739862 co-relation queries the response was YES. [2024-06-27 18:17:19,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110056 conditions, 12904 events. 8120/12904 cut-off events. For 1739841/1739862 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 87292 event pairs, 1963 based on Foata normal form. 13/12662 useless extension candidates. Maximal degree in co-relation 109904. Up to 10924 conditions per place. [2024-06-27 18:17:19,458 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 382 selfloop transitions, 96 changer transitions 0/488 dead transitions. [2024-06-27 18:17:19,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 488 transitions, 5394 flow [2024-06-27 18:17:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:17:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:17:19,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-27 18:17:19,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.512 [2024-06-27 18:17:19,459 INFO L175 Difference]: Start difference. First operand has 328 places, 427 transitions, 4102 flow. Second operand 10 states and 256 transitions. [2024-06-27 18:17:19,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 488 transitions, 5394 flow [2024-06-27 18:17:23,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 488 transitions, 5095 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 18:17:23,030 INFO L231 Difference]: Finished difference. Result has 331 places, 429 transitions, 4112 flow [2024-06-27 18:17:23,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4112, PETRI_PLACES=331, PETRI_TRANSITIONS=429} [2024-06-27 18:17:23,030 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 275 predicate places. [2024-06-27 18:17:23,030 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 429 transitions, 4112 flow [2024-06-27 18:17:23,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:23,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:23,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:23,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 18:17:23,031 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:23,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:23,031 INFO L85 PathProgramCache]: Analyzing trace with hash 599167510, now seen corresponding path program 10 times [2024-06-27 18:17:23,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:23,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670214926] [2024-06-27 18:17:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:23,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:23,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 18:17:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 18:17:24,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 18:17:24,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670214926] [2024-06-27 18:17:24,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670214926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 18:17:24,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 18:17:24,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 18:17:24,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450657444] [2024-06-27 18:17:24,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 18:17:24,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 18:17:24,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 18:17:24,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 18:17:24,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 18:17:24,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 50 [2024-06-27 18:17:24,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 429 transitions, 4112 flow. Second operand has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:24,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 18:17:24,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 50 [2024-06-27 18:17:24,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 18:17:27,592 INFO L124 PetriNetUnfolderBase]: 8157/12924 cut-off events. [2024-06-27 18:17:27,593 INFO L125 PetriNetUnfolderBase]: For 1775044/1775065 co-relation queries the response was YES. [2024-06-27 18:17:27,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110835 conditions, 12924 events. 8157/12924 cut-off events. For 1775044/1775065 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 87103 event pairs, 1935 based on Foata normal form. 13/12689 useless extension candidates. Maximal degree in co-relation 110682. Up to 10834 conditions per place. [2024-06-27 18:17:27,801 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 378 selfloop transitions, 103 changer transitions 0/491 dead transitions. [2024-06-27 18:17:27,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 491 transitions, 5416 flow [2024-06-27 18:17:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 18:17:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 18:17:27,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-27 18:17:27,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.514 [2024-06-27 18:17:27,803 INFO L175 Difference]: Start difference. First operand has 331 places, 429 transitions, 4112 flow. Second operand 10 states and 257 transitions. [2024-06-27 18:17:27,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 491 transitions, 5416 flow [2024-06-27 18:17:31,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 491 transitions, 5140 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 18:17:31,696 INFO L231 Difference]: Finished difference. Result has 335 places, 431 transitions, 4163 flow [2024-06-27 18:17:31,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3836, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4163, PETRI_PLACES=335, PETRI_TRANSITIONS=431} [2024-06-27 18:17:31,697 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 279 predicate places. [2024-06-27 18:17:31,697 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 431 transitions, 4163 flow [2024-06-27 18:17:31,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.272727272727273) internal successors, (157), 11 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 18:17:31,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 18:17:31,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 18:17:31,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 18:17:31,698 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (and 6 more)] === [2024-06-27 18:17:31,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 18:17:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash -298062894, now seen corresponding path program 11 times [2024-06-27 18:17:31,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 18:17:31,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646727860] [2024-06-27 18:17:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 18:17:31,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 18:17:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat