./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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function 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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:46:01,033 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:46:01,066 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:46:01,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:46:01,075 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:46:01,099 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:46:01,101 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:46:01,101 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:46:01,102 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:46:01,104 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:46:01,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:46:01,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:46:01,106 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:46:01,106 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:46:01,107 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:46:01,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:46:01,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:46:01,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:46:01,107 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:46:01,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:46:01,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:46:01,108 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:46:01,108 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:46:01,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:46:01,109 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:46:01,109 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:46:01,109 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:46:01,109 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:46:01,110 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:46:01,110 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:46:01,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:46:01,111 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:46:01,111 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:46:01,111 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:46:01,112 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:46:01,112 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:46:01,112 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:46:01,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:46:01,112 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:46:01,113 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:46:01,113 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:46:01,113 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:46:01,113 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:46:01,113 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:46:01,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:46:01,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:46:01,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:46:01,350 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:46:01,351 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:46:01,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-27 19:46:02,444 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:46:02,735 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:46:02,736 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-27 19:46:02,748 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22b75c272/b45171bbaafb42d7b6a380cc02cbaeaa/FLAG079693a10 [2024-06-27 19:46:02,762 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22b75c272/b45171bbaafb42d7b6a380cc02cbaeaa [2024-06-27 19:46:02,764 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:46:02,764 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:46:02,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix002.opt.yml/witness.yml [2024-06-27 19:46:02,911 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:46:02,917 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:46:02,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:46:02,919 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:46:02,923 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:46:02,923 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:46:02" (1/2) ... [2024-06-27 19:46:02,924 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a267b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:02, skipping insertion in model container [2024-06-27 19:46:02,924 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:46:02" (1/2) ... [2024-06-27 19:46:02,926 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1d8eba84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:46:02, skipping insertion in model container [2024-06-27 19:46:02,926 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:46:02" (2/2) ... [2024-06-27 19:46:02,927 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a267b9b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:02, skipping insertion in model container [2024-06-27 19:46:02,927 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:46:02" (2/2) ... [2024-06-27 19:46:02,927 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:46:03,008 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:46:03,009 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$flush_delayed == (_Bool)0) [2024-06-27 19:46:03,010 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || z$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 19:46:03,010 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 19:46:03,010 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:46:03,010 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-27 19:46:03,048 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:46:03,413 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:46:03,423 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:46:03,517 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:46:03,551 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:46:03,552 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03 WrapperNode [2024-06-27 19:46:03,553 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:46:03,553 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:46:03,554 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:46:03,554 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:46:03,558 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,579 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,618 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 152 [2024-06-27 19:46:03,618 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:46:03,619 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:46:03,619 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:46:03,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:46:03,627 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,627 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,630 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,644 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 19:46:03,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,644 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,662 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,663 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:46:03,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:46:03,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:46:03,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:46:03,670 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (1/1) ... [2024-06-27 19:46:03,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:46:03,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:46:03,706 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 19:46:03,723 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 19:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:46:03,736 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:46:03,737 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:46:03,737 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:46:03,737 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:46:03,737 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:46:03,738 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:46:03,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:46:03,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:46:03,739 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 19:46:03,877 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:46:03,879 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:46:04,270 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:46:04,272 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:46:04,425 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:46:04,425 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:46:04,426 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:46:04 BoogieIcfgContainer [2024-06-27 19:46:04,426 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:46:04,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:46:04,430 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:46:04,432 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:46:04,432 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:46:02" (1/4) ... [2024-06-27 19:46:04,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2e891c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:46:04, skipping insertion in model container [2024-06-27 19:46:04,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:46:02" (2/4) ... [2024-06-27 19:46:04,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2e891c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:46:04, skipping insertion in model container [2024-06-27 19:46:04,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:46:03" (3/4) ... [2024-06-27 19:46:04,434 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2e891c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:46:04, skipping insertion in model container [2024-06-27 19:46:04,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:46:04" (4/4) ... [2024-06-27 19:46:04,435 INFO L112 eAbstractionObserver]: Analyzing ICFG mix002.opt.i [2024-06-27 19:46:04,447 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:46:04,447 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:46:04,448 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:46:04,498 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:46:04,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 19:46:04,555 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-27 19:46:04,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:46:04,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:46:04,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-27 19:46:04,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-27 19:46:04,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:46:04,578 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;@2c37667f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:46:04,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:46:04,581 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:46:04,582 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:46:04,582 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:46:04,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:04,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:46:04,583 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:04,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:04,587 INFO L85 PathProgramCache]: Analyzing trace with hash 406084588, now seen corresponding path program 1 times [2024-06-27 19:46:04,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:04,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416868706] [2024-06-27 19:46:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:04,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:04,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:05,829 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 19:46:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416868706] [2024-06-27 19:46:05,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416868706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:05,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:05,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:46:05,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820337167] [2024-06-27 19:46:05,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:05,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:46:05,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:46:05,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:46:05,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-27 19:46:05,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 19:46:05,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:05,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-27 19:46:05,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:06,148 INFO L124 PetriNetUnfolderBase]: 1116/1792 cut-off events. [2024-06-27 19:46:06,149 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 19:46:06,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3543 conditions, 1792 events. 1116/1792 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9553 event pairs, 765 based on Foata normal form. 1/1724 useless extension candidates. Maximal degree in co-relation 3531. Up to 1676 conditions per place. [2024-06-27 19:46:06,161 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-27 19:46:06,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 175 flow [2024-06-27 19:46:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:46:06,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:46:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-27 19:46:06,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-27 19:46:06,171 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 86 transitions. [2024-06-27 19:46:06,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 175 flow [2024-06-27 19:46:06,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:46:06,174 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-27 19:46:06,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 19:46:06,178 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-27 19:46:06,178 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-27 19:46:06,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 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 19:46:06,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:06,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:06,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:46:06,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:06,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash -594026213, now seen corresponding path program 1 times [2024-06-27 19:46:06,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:06,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394514458] [2024-06-27 19:46:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:06,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:07,076 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 19:46:07,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:07,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394514458] [2024-06-27 19:46:07,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394514458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:07,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:07,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:46:07,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079189862] [2024-06-27 19:46:07,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:07,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:46:07,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:07,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:46:07,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:46:07,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-27 19:46:07,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:46:07,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:07,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-27 19:46:07,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:07,370 INFO L124 PetriNetUnfolderBase]: 1280/1988 cut-off events. [2024-06-27 19:46:07,371 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-06-27 19:46:07,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 1988 events. 1280/1988 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10399 event pairs, 750 based on Foata normal form. 3/1970 useless extension candidates. Maximal degree in co-relation 4497. Up to 1897 conditions per place. [2024-06-27 19:46:07,380 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-27 19:46:07,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2024-06-27 19:46:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:46:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:46:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-27 19:46:07,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-27 19:46:07,382 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 109 transitions. [2024-06-27 19:46:07,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2024-06-27 19:46:07,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:46:07,384 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-27 19:46:07,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-27 19:46:07,385 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-27 19:46:07,385 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-27 19:46:07,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 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 19:46:07,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:07,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:07,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:46:07,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:07,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1234942835, now seen corresponding path program 1 times [2024-06-27 19:46:07,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:07,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803466942] [2024-06-27 19:46:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:07,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:08,593 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 19:46:08,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:08,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803466942] [2024-06-27 19:46:08,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803466942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:08,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:08,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:46:08,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036136044] [2024-06-27 19:46:08,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:46:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:08,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:46:08,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:46:08,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 19:46:08,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 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 19:46:08,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:08,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 19:46:08,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:08,960 INFO L124 PetriNetUnfolderBase]: 1558/2398 cut-off events. [2024-06-27 19:46:08,960 INFO L125 PetriNetUnfolderBase]: For 1327/1327 co-relation queries the response was YES. [2024-06-27 19:46:08,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6014 conditions, 2398 events. 1558/2398 cut-off events. For 1327/1327 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12426 event pairs, 839 based on Foata normal form. 3/2382 useless extension candidates. Maximal degree in co-relation 6000. Up to 2286 conditions per place. [2024-06-27 19:46:08,970 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 47 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-27 19:46:08,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 324 flow [2024-06-27 19:46:08,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:46:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:46:08,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-27 19:46:08,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-27 19:46:08,972 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-27 19:46:08,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 324 flow [2024-06-27 19:46:08,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:46:08,974 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-27 19:46:08,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-27 19:46:08,975 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-27 19:46:08,975 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-27 19:46:08,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 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 19:46:08,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:08,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:08,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:46:08,976 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:08,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:08,976 INFO L85 PathProgramCache]: Analyzing trace with hash -293456726, now seen corresponding path program 1 times [2024-06-27 19:46:08,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:08,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890419899] [2024-06-27 19:46:08,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:08,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:10,485 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 19:46:10,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:10,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890419899] [2024-06-27 19:46:10,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890419899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:10,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:10,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:46:10,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222445029] [2024-06-27 19:46:10,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:10,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:46:10,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:46:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:46:10,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 19:46:10,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 19:46:10,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:10,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 19:46:10,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:10,880 INFO L124 PetriNetUnfolderBase]: 1552/2407 cut-off events. [2024-06-27 19:46:10,881 INFO L125 PetriNetUnfolderBase]: For 2479/2479 co-relation queries the response was YES. [2024-06-27 19:46:10,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 2407 events. 1552/2407 cut-off events. For 2479/2479 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12601 event pairs, 697 based on Foata normal form. 3/2404 useless extension candidates. Maximal degree in co-relation 6578. Up to 2262 conditions per place. [2024-06-27 19:46:10,893 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-27 19:46:10,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 402 flow [2024-06-27 19:46:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:10,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:46:10,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:46:10,895 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:46:10,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 402 flow [2024-06-27 19:46:10,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:46:10,898 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-27 19:46:10,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-27 19:46:10,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-27 19:46:10,899 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-27 19:46:10,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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 19:46:10,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:10,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:46:10,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:10,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:10,900 INFO L85 PathProgramCache]: Analyzing trace with hash -568962572, now seen corresponding path program 1 times [2024-06-27 19:46:10,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:10,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123262393] [2024-06-27 19:46:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:11,490 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 19:46:11,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:11,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123262393] [2024-06-27 19:46:11,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123262393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:11,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:11,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:46:11,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105091852] [2024-06-27 19:46:11,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:11,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:46:11,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:11,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:46:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:46:11,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:46:11,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 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 19:46:11,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:11,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:46:11,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:12,045 INFO L124 PetriNetUnfolderBase]: 1836/2891 cut-off events. [2024-06-27 19:46:12,045 INFO L125 PetriNetUnfolderBase]: For 4376/4376 co-relation queries the response was YES. [2024-06-27 19:46:12,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8378 conditions, 2891 events. 1836/2891 cut-off events. For 4376/4376 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15166 event pairs, 950 based on Foata normal form. 2/2851 useless extension candidates. Maximal degree in co-relation 8361. Up to 2709 conditions per place. [2024-06-27 19:46:12,063 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 45 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-27 19:46:12,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 364 flow [2024-06-27 19:46:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:46:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:46:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-27 19:46:12,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 19:46:12,065 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 107 transitions. [2024-06-27 19:46:12,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 364 flow [2024-06-27 19:46:12,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:12,073 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-27 19:46:12,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-27 19:46:12,075 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-27 19:46:12,075 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-27 19:46:12,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 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 19:46:12,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:12,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:12,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:46:12,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:12,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:12,080 INFO L85 PathProgramCache]: Analyzing trace with hash -501762066, now seen corresponding path program 1 times [2024-06-27 19:46:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:12,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745803554] [2024-06-27 19:46:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:12,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:12,831 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 19:46:12,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:12,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745803554] [2024-06-27 19:46:12,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745803554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:12,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:12,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544054701] [2024-06-27 19:46:12,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:12,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:12,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:12,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:12,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:12,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:46:12,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 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 19:46:12,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:12,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:46:12,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:13,490 INFO L124 PetriNetUnfolderBase]: 1819/2922 cut-off events. [2024-06-27 19:46:13,491 INFO L125 PetriNetUnfolderBase]: For 6017/6017 co-relation queries the response was YES. [2024-06-27 19:46:13,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8945 conditions, 2922 events. 1819/2922 cut-off events. For 6017/6017 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15586 event pairs, 914 based on Foata normal form. 4/2916 useless extension candidates. Maximal degree in co-relation 8926. Up to 2677 conditions per place. [2024-06-27 19:46:13,507 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-27 19:46:13,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 408 flow [2024-06-27 19:46:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-27 19:46:13,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-27 19:46:13,508 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 127 transitions. [2024-06-27 19:46:13,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 408 flow [2024-06-27 19:46:13,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 386 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 19:46:13,512 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-27 19:46:13,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-27 19:46:13,512 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-27 19:46:13,513 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-27 19:46:13,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 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 19:46:13,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:13,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:13,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:46:13,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:13,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2716375, now seen corresponding path program 1 times [2024-06-27 19:46:13,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:13,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127036761] [2024-06-27 19:46:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:13,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:14,238 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 19:46:14,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127036761] [2024-06-27 19:46:14,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127036761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:14,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:14,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79741481] [2024-06-27 19:46:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:14,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:14,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:14,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:14,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:46:14,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 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 19:46:14,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:14,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:46:14,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:14,908 INFO L124 PetriNetUnfolderBase]: 2110/3221 cut-off events. [2024-06-27 19:46:14,908 INFO L125 PetriNetUnfolderBase]: For 9465/9471 co-relation queries the response was YES. [2024-06-27 19:46:14,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10820 conditions, 3221 events. 2110/3221 cut-off events. For 9465/9471 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16347 event pairs, 1074 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 10800. Up to 3081 conditions per place. [2024-06-27 19:46:14,931 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 56 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-27 19:46:14,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 522 flow [2024-06-27 19:46:14,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:14,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:14,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-27 19:46:14,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-27 19:46:14,933 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 128 transitions. [2024-06-27 19:46:14,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 522 flow [2024-06-27 19:46:14,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 490 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:14,937 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 318 flow [2024-06-27 19:46:14,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-27 19:46:14,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-27 19:46:14,938 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 318 flow [2024-06-27 19:46:14,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 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 19:46:14,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:14,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:14,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:46:14,939 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:14,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:14,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1417243637, now seen corresponding path program 1 times [2024-06-27 19:46:14,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:14,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853641673] [2024-06-27 19:46:14,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:14,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:16,899 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 19:46:16,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:16,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853641673] [2024-06-27 19:46:16,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853641673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:16,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:16,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:16,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124233556] [2024-06-27 19:46:16,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:16,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:16,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:16,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:46:16,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:16,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:16,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:46:16,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:17,496 INFO L124 PetriNetUnfolderBase]: 2092/3200 cut-off events. [2024-06-27 19:46:17,497 INFO L125 PetriNetUnfolderBase]: For 12578/12578 co-relation queries the response was YES. [2024-06-27 19:46:17,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11344 conditions, 3200 events. 2092/3200 cut-off events. For 12578/12578 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16314 event pairs, 688 based on Foata normal form. 6/3194 useless extension candidates. Maximal degree in co-relation 11324. Up to 2974 conditions per place. [2024-06-27 19:46:17,516 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-06-27 19:46:17,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 632 flow [2024-06-27 19:46:17,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-27 19:46:17,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-27 19:46:17,521 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 318 flow. Second operand 8 states and 191 transitions. [2024-06-27 19:46:17,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 632 flow [2024-06-27 19:46:17,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 608 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-27 19:46:17,528 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 373 flow [2024-06-27 19:46:17,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=373, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-27 19:46:17,530 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-27 19:46:17,530 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 373 flow [2024-06-27 19:46:17,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:17,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:17,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:17,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:46:17,530 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:17,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1625236501, now seen corresponding path program 2 times [2024-06-27 19:46:17,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:17,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711360085] [2024-06-27 19:46:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:17,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:18,196 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 19:46:18,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:18,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711360085] [2024-06-27 19:46:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711360085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:18,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:18,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:18,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200654594] [2024-06-27 19:46:18,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:18,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:18,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:18,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:18,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:46:18,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 373 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 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 19:46:18,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:18,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:46:18,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:18,881 INFO L124 PetriNetUnfolderBase]: 2096/3204 cut-off events. [2024-06-27 19:46:18,881 INFO L125 PetriNetUnfolderBase]: For 15999/16014 co-relation queries the response was YES. [2024-06-27 19:46:18,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12174 conditions, 3204 events. 2096/3204 cut-off events. For 15999/16014 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16299 event pairs, 895 based on Foata normal form. 12/3212 useless extension candidates. Maximal degree in co-relation 12151. Up to 3061 conditions per place. [2024-06-27 19:46:18,898 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-27 19:46:18,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 553 flow [2024-06-27 19:46:18,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 19:46:18,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 19:46:18,900 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 373 flow. Second operand 6 states and 122 transitions. [2024-06-27 19:46:18,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 553 flow [2024-06-27 19:46:18,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 488 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:18,909 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 348 flow [2024-06-27 19:46:18,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-27 19:46:18,910 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-27 19:46:18,910 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 348 flow [2024-06-27 19:46:18,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 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 19:46:18,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:18,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:18,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:46:18,911 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:18,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:18,911 INFO L85 PathProgramCache]: Analyzing trace with hash 955716885, now seen corresponding path program 1 times [2024-06-27 19:46:18,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:18,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407218295] [2024-06-27 19:46:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:18,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:19,527 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 19:46:19,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:19,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407218295] [2024-06-27 19:46:19,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407218295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:19,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:19,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:19,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322386130] [2024-06-27 19:46:19,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:19,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:19,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:19,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:19,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:19,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:19,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 348 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 19:46:19,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:19,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:19,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:20,190 INFO L124 PetriNetUnfolderBase]: 2311/3475 cut-off events. [2024-06-27 19:46:20,190 INFO L125 PetriNetUnfolderBase]: For 19146/19156 co-relation queries the response was YES. [2024-06-27 19:46:20,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13417 conditions, 3475 events. 2311/3475 cut-off events. For 19146/19156 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17230 event pairs, 870 based on Foata normal form. 10/3482 useless extension candidates. Maximal degree in co-relation 13392. Up to 3259 conditions per place. [2024-06-27 19:46:20,208 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 78 selfloop transitions, 41 changer transitions 0/124 dead transitions. [2024-06-27 19:46:20,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 124 transitions, 995 flow [2024-06-27 19:46:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:20,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 19:46:20,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-27 19:46:20,209 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 348 flow. Second operand 8 states and 166 transitions. [2024-06-27 19:46:20,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 124 transitions, 995 flow [2024-06-27 19:46:20,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 124 transitions, 930 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:20,218 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 638 flow [2024-06-27 19:46:20,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=638, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2024-06-27 19:46:20,219 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-27 19:46:20,221 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 638 flow [2024-06-27 19:46:20,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 19:46:20,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:20,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:20,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:46:20,221 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:20,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:20,222 INFO L85 PathProgramCache]: Analyzing trace with hash 84029139, now seen corresponding path program 2 times [2024-06-27 19:46:20,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:20,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936894102] [2024-06-27 19:46:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:20,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:20,887 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 19:46:20,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:20,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936894102] [2024-06-27 19:46:20,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936894102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:20,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:20,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:20,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543281015] [2024-06-27 19:46:20,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:20,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:20,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:20,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:20,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:20,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:20,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 638 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 19:46:20,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:20,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:20,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:21,579 INFO L124 PetriNetUnfolderBase]: 2327/3497 cut-off events. [2024-06-27 19:46:21,579 INFO L125 PetriNetUnfolderBase]: For 23681/23695 co-relation queries the response was YES. [2024-06-27 19:46:21,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14528 conditions, 3497 events. 2327/3497 cut-off events. For 23681/23695 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17345 event pairs, 875 based on Foata normal form. 16/3510 useless extension candidates. Maximal degree in co-relation 14499. Up to 3277 conditions per place. [2024-06-27 19:46:21,596 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 49 changer transitions 0/124 dead transitions. [2024-06-27 19:46:21,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 124 transitions, 1082 flow [2024-06-27 19:46:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:21,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:46:21,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 19:46:21,598 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 638 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:46:21,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 124 transitions, 1082 flow [2024-06-27 19:46:21,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 124 transitions, 1048 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:46:21,615 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 791 flow [2024-06-27 19:46:21,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2024-06-27 19:46:21,616 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-27 19:46:21,616 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 791 flow [2024-06-27 19:46:21,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 19:46:21,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:21,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:21,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:46:21,616 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:21,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1393450129, now seen corresponding path program 1 times [2024-06-27 19:46:21,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:21,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436486298] [2024-06-27 19:46:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:21,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:22,359 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 19:46:22,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:22,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436486298] [2024-06-27 19:46:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436486298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:22,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:22,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:22,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162430051] [2024-06-27 19:46:22,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:22,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:22,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:22,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:22,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:22,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:46:22,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 791 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 19:46:22,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:22,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:46:22,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:23,138 INFO L124 PetriNetUnfolderBase]: 2230/3415 cut-off events. [2024-06-27 19:46:23,138 INFO L125 PetriNetUnfolderBase]: For 27008/27022 co-relation queries the response was YES. [2024-06-27 19:46:23,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14614 conditions, 3415 events. 2230/3415 cut-off events. For 27008/27022 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17447 event pairs, 825 based on Foata normal form. 13/3425 useless extension candidates. Maximal degree in co-relation 14583. Up to 3128 conditions per place. [2024-06-27 19:46:23,156 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 86 selfloop transitions, 30 changer transitions 0/131 dead transitions. [2024-06-27 19:46:23,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 1219 flow [2024-06-27 19:46:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:23,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:23,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 19:46:23,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-27 19:46:23,157 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 791 flow. Second operand 7 states and 150 transitions. [2024-06-27 19:46:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 1219 flow [2024-06-27 19:46:23,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 131 transitions, 1091 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:23,175 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 802 flow [2024-06-27 19:46:23,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-27 19:46:23,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-27 19:46:23,177 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 802 flow [2024-06-27 19:46:23,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 19:46:23,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:23,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:23,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:46:23,178 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:23,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:23,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1393450377, now seen corresponding path program 3 times [2024-06-27 19:46:23,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:23,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808493253] [2024-06-27 19:46:23,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:23,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:23,855 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 19:46:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808493253] [2024-06-27 19:46:23,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808493253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:23,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:23,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998653209] [2024-06-27 19:46:23,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:23,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:23,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:23,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:23,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 802 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 19:46:23,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:23,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:23,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:24,622 INFO L124 PetriNetUnfolderBase]: 2372/3568 cut-off events. [2024-06-27 19:46:24,622 INFO L125 PetriNetUnfolderBase]: For 28646/28649 co-relation queries the response was YES. [2024-06-27 19:46:24,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15644 conditions, 3568 events. 2372/3568 cut-off events. For 28646/28649 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17704 event pairs, 855 based on Foata normal form. 7/3572 useless extension candidates. Maximal degree in co-relation 15613. Up to 3335 conditions per place. [2024-06-27 19:46:24,639 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 76 selfloop transitions, 55 changer transitions 0/136 dead transitions. [2024-06-27 19:46:24,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 1296 flow [2024-06-27 19:46:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 19:46:24,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-27 19:46:24,640 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 802 flow. Second operand 7 states and 141 transitions. [2024-06-27 19:46:24,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 1296 flow [2024-06-27 19:46:24,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 1255 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-27 19:46:24,660 INFO L231 Difference]: Finished difference. Result has 84 places, 111 transitions, 994 flow [2024-06-27 19:46:24,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=994, PETRI_PLACES=84, PETRI_TRANSITIONS=111} [2024-06-27 19:46:24,661 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-27 19:46:24,661 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 111 transitions, 994 flow [2024-06-27 19:46:24,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 19:46:24,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:24,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:24,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:46:24,662 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:24,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:24,662 INFO L85 PathProgramCache]: Analyzing trace with hash -636814507, now seen corresponding path program 4 times [2024-06-27 19:46:24,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:24,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025021187] [2024-06-27 19:46:24,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:24,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:25,249 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 19:46:25,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:25,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025021187] [2024-06-27 19:46:25,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025021187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:25,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:25,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:25,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164686111] [2024-06-27 19:46:25,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:25,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:25,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:25,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:25,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:25,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:25,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 111 transitions, 994 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 19:46:25,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:25,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:25,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:26,023 INFO L124 PetriNetUnfolderBase]: 2361/3556 cut-off events. [2024-06-27 19:46:26,024 INFO L125 PetriNetUnfolderBase]: For 32451/32466 co-relation queries the response was YES. [2024-06-27 19:46:26,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16006 conditions, 3556 events. 2361/3556 cut-off events. For 32451/32466 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17657 event pairs, 859 based on Foata normal form. 14/3559 useless extension candidates. Maximal degree in co-relation 15973. Up to 3324 conditions per place. [2024-06-27 19:46:26,047 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 71 selfloop transitions, 55 changer transitions 0/131 dead transitions. [2024-06-27 19:46:26,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1314 flow [2024-06-27 19:46:26,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:26,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:46:26,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-27 19:46:26,049 INFO L175 Difference]: Start difference. First operand has 84 places, 111 transitions, 994 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:46:26,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1314 flow [2024-06-27 19:46:26,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1145 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:26,081 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 950 flow [2024-06-27 19:46:26,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=950, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2024-06-27 19:46:26,082 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-27 19:46:26,082 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 950 flow [2024-06-27 19:46:26,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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 19:46:26,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:26,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:26,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:46:26,082 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:26,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1157274769, now seen corresponding path program 2 times [2024-06-27 19:46:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:26,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270709490] [2024-06-27 19:46:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:26,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:26,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:26,796 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 19:46:26,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:26,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270709490] [2024-06-27 19:46:26,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270709490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:26,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:26,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:26,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434507567] [2024-06-27 19:46:26,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:26,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:26,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:26,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:26,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:26,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:46:26,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 950 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 19:46:26,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:26,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:46:26,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:27,498 INFO L124 PetriNetUnfolderBase]: 2261/3465 cut-off events. [2024-06-27 19:46:27,499 INFO L125 PetriNetUnfolderBase]: For 35741/35756 co-relation queries the response was YES. [2024-06-27 19:46:27,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 3465 events. 2261/3465 cut-off events. For 35741/35756 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17663 event pairs, 816 based on Foata normal form. 14/3473 useless extension candidates. Maximal degree in co-relation 15771. Up to 3159 conditions per place. [2024-06-27 19:46:27,521 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 91 selfloop transitions, 33 changer transitions 0/142 dead transitions. [2024-06-27 19:46:27,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 142 transitions, 1378 flow [2024-06-27 19:46:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:27,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:27,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-27 19:46:27,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:46:27,522 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 950 flow. Second operand 7 states and 147 transitions. [2024-06-27 19:46:27,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 142 transitions, 1378 flow [2024-06-27 19:46:27,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1209 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:27,550 INFO L231 Difference]: Finished difference. Result has 87 places, 114 transitions, 892 flow [2024-06-27 19:46:27,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=87, PETRI_TRANSITIONS=114} [2024-06-27 19:46:27,551 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-27 19:46:27,551 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 114 transitions, 892 flow [2024-06-27 19:46:27,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 19:46:27,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:27,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:27,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:46:27,552 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:27,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:27,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1156978099, now seen corresponding path program 3 times [2024-06-27 19:46:27,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:27,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303969166] [2024-06-27 19:46:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:27,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:28,147 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 19:46:28,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:28,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303969166] [2024-06-27 19:46:28,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303969166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:28,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:28,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:28,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027420438] [2024-06-27 19:46:28,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:28,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:28,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:28,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:28,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:28,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:46:28,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 19:46:28,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:28,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:46:28,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:28,894 INFO L124 PetriNetUnfolderBase]: 2253/3452 cut-off events. [2024-06-27 19:46:28,894 INFO L125 PetriNetUnfolderBase]: For 39129/39144 co-relation queries the response was YES. [2024-06-27 19:46:28,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15935 conditions, 3452 events. 2253/3452 cut-off events. For 39129/39144 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17590 event pairs, 816 based on Foata normal form. 14/3460 useless extension candidates. Maximal degree in co-relation 15900. Up to 3151 conditions per place. [2024-06-27 19:46:28,913 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 85 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2024-06-27 19:46:28,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 138 transitions, 1212 flow [2024-06-27 19:46:28,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:28,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:28,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:46:28,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 19:46:28,917 INFO L175 Difference]: Start difference. First operand has 87 places, 114 transitions, 892 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:46:28,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 138 transitions, 1212 flow [2024-06-27 19:46:28,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1102 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:28,953 INFO L231 Difference]: Finished difference. Result has 89 places, 114 transitions, 860 flow [2024-06-27 19:46:28,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=89, PETRI_TRANSITIONS=114} [2024-06-27 19:46:28,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-27 19:46:28,954 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 114 transitions, 860 flow [2024-06-27 19:46:28,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 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 19:46:28,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:28,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:28,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:46:28,956 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:28,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:28,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1858660447, now seen corresponding path program 1 times [2024-06-27 19:46:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:28,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487604389] [2024-06-27 19:46:28,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:28,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:28,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:29,664 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 19:46:29,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:29,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487604389] [2024-06-27 19:46:29,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487604389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:29,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:29,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:46:29,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963112282] [2024-06-27 19:46:29,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:29,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:46:29,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:29,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:46:29,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:46:29,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 19:46:29,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 19:46:29,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:29,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 19:46:29,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:30,148 INFO L124 PetriNetUnfolderBase]: 1731/2905 cut-off events. [2024-06-27 19:46:30,148 INFO L125 PetriNetUnfolderBase]: For 37099/37099 co-relation queries the response was YES. [2024-06-27 19:46:30,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13525 conditions, 2905 events. 1731/2905 cut-off events. For 37099/37099 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16437 event pairs, 685 based on Foata normal form. 1/2896 useless extension candidates. Maximal degree in co-relation 13489. Up to 2524 conditions per place. [2024-06-27 19:46:30,166 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 81 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2024-06-27 19:46:30,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 125 transitions, 1084 flow [2024-06-27 19:46:30,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:46:30,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:46:30,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 19:46:30,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:46:30,168 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 860 flow. Second operand 5 states and 110 transitions. [2024-06-27 19:46:30,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 125 transitions, 1084 flow [2024-06-27 19:46:30,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 1001 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:46:30,195 INFO L231 Difference]: Finished difference. Result has 88 places, 117 transitions, 827 flow [2024-06-27 19:46:30,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=827, PETRI_PLACES=88, PETRI_TRANSITIONS=117} [2024-06-27 19:46:30,196 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-27 19:46:30,196 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 117 transitions, 827 flow [2024-06-27 19:46:30,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 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 19:46:30,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:30,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:30,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:46:30,197 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:30,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:30,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1690212682, now seen corresponding path program 1 times [2024-06-27 19:46:30,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:30,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716848808] [2024-06-27 19:46:30,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:30,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:31,016 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 19:46:31,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:31,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716848808] [2024-06-27 19:46:31,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716848808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:31,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:31,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457967717] [2024-06-27 19:46:31,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:31,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:31,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:31,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:31,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 117 transitions, 827 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:31,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:31,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:31,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:31,947 INFO L124 PetriNetUnfolderBase]: 2381/3585 cut-off events. [2024-06-27 19:46:31,947 INFO L125 PetriNetUnfolderBase]: For 47069/47076 co-relation queries the response was YES. [2024-06-27 19:46:31,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17270 conditions, 3585 events. 2381/3585 cut-off events. For 47069/47076 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17860 event pairs, 838 based on Foata normal form. 8/3590 useless extension candidates. Maximal degree in co-relation 17233. Up to 3273 conditions per place. [2024-06-27 19:46:31,966 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 65 changer transitions 0/157 dead transitions. [2024-06-27 19:46:31,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 157 transitions, 1369 flow [2024-06-27 19:46:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:31,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:31,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 19:46:31,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 19:46:31,968 INFO L175 Difference]: Start difference. First operand has 88 places, 117 transitions, 827 flow. Second operand 8 states and 164 transitions. [2024-06-27 19:46:31,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 157 transitions, 1369 flow [2024-06-27 19:46:31,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 157 transitions, 1341 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:46:31,994 INFO L231 Difference]: Finished difference. Result has 93 places, 123 transitions, 1011 flow [2024-06-27 19:46:31,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1011, PETRI_PLACES=93, PETRI_TRANSITIONS=123} [2024-06-27 19:46:31,994 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-27 19:46:31,994 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 123 transitions, 1011 flow [2024-06-27 19:46:31,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:31,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:31,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:31,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:46:31,995 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:31,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:31,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1690062735, now seen corresponding path program 1 times [2024-06-27 19:46:31,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:31,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107689298] [2024-06-27 19:46:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:32,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:32,767 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 19:46:32,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:32,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107689298] [2024-06-27 19:46:32,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107689298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:32,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:32,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:32,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467523581] [2024-06-27 19:46:32,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:32,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:32,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:32,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:32,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:32,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:32,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 123 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:32,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:32,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:32,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:33,547 INFO L124 PetriNetUnfolderBase]: 2403/3616 cut-off events. [2024-06-27 19:46:33,547 INFO L125 PetriNetUnfolderBase]: For 54101/54108 co-relation queries the response was YES. [2024-06-27 19:46:33,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18312 conditions, 3616 events. 2403/3616 cut-off events. For 54101/54108 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17954 event pairs, 761 based on Foata normal form. 8/3621 useless extension candidates. Maximal degree in co-relation 18274. Up to 3200 conditions per place. [2024-06-27 19:46:33,570 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 95 selfloop transitions, 65 changer transitions 0/165 dead transitions. [2024-06-27 19:46:33,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 165 transitions, 1581 flow [2024-06-27 19:46:33,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:33,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 19:46:33,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 19:46:33,572 INFO L175 Difference]: Start difference. First operand has 93 places, 123 transitions, 1011 flow. Second operand 8 states and 167 transitions. [2024-06-27 19:46:33,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 165 transitions, 1581 flow [2024-06-27 19:46:33,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 165 transitions, 1476 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:33,622 INFO L231 Difference]: Finished difference. Result has 97 places, 129 transitions, 1124 flow [2024-06-27 19:46:33,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1124, PETRI_PLACES=97, PETRI_TRANSITIONS=129} [2024-06-27 19:46:33,623 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-27 19:46:33,623 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 129 transitions, 1124 flow [2024-06-27 19:46:33,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:33,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:33,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:33,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:46:33,624 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:33,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:33,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1482831938, now seen corresponding path program 2 times [2024-06-27 19:46:33,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:33,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288410678] [2024-06-27 19:46:33,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:33,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:34,451 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 19:46:34,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:34,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288410678] [2024-06-27 19:46:34,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288410678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:34,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:34,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:34,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987709913] [2024-06-27 19:46:34,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:34,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:34,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:34,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:34,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:34,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:34,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 129 transitions, 1124 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:34,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:34,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:34,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:35,407 INFO L124 PetriNetUnfolderBase]: 2414/3632 cut-off events. [2024-06-27 19:46:35,407 INFO L125 PetriNetUnfolderBase]: For 60193/60200 co-relation queries the response was YES. [2024-06-27 19:46:35,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19114 conditions, 3632 events. 2414/3632 cut-off events. For 60193/60200 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18112 event pairs, 817 based on Foata normal form. 8/3637 useless extension candidates. Maximal degree in co-relation 19074. Up to 3317 conditions per place. [2024-06-27 19:46:35,426 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 99 selfloop transitions, 61 changer transitions 0/165 dead transitions. [2024-06-27 19:46:35,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 165 transitions, 1652 flow [2024-06-27 19:46:35,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:46:35,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 19:46:35,428 INFO L175 Difference]: Start difference. First operand has 97 places, 129 transitions, 1124 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:46:35,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 165 transitions, 1652 flow [2024-06-27 19:46:35,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 165 transitions, 1571 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:35,464 INFO L231 Difference]: Finished difference. Result has 101 places, 132 transitions, 1205 flow [2024-06-27 19:46:35,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1205, PETRI_PLACES=101, PETRI_TRANSITIONS=132} [2024-06-27 19:46:35,464 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-27 19:46:35,465 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 132 transitions, 1205 flow [2024-06-27 19:46:35,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:35,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:35,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:35,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:46:35,465 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:35,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:35,466 INFO L85 PathProgramCache]: Analyzing trace with hash -247280035, now seen corresponding path program 2 times [2024-06-27 19:46:35,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:35,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802562692] [2024-06-27 19:46:35,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:35,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:36,219 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 19:46:36,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:36,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802562692] [2024-06-27 19:46:36,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802562692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:36,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:36,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308657872] [2024-06-27 19:46:36,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:36,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:36,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:36,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 132 transitions, 1205 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:36,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:36,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:36,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:37,100 INFO L124 PetriNetUnfolderBase]: 2468/3715 cut-off events. [2024-06-27 19:46:37,100 INFO L125 PetriNetUnfolderBase]: For 67426/67429 co-relation queries the response was YES. [2024-06-27 19:46:37,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19980 conditions, 3715 events. 2468/3715 cut-off events. For 67426/67429 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18513 event pairs, 770 based on Foata normal form. 4/3716 useless extension candidates. Maximal degree in co-relation 19938. Up to 3262 conditions per place. [2024-06-27 19:46:37,125 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 69 changer transitions 0/172 dead transitions. [2024-06-27 19:46:37,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 172 transitions, 1857 flow [2024-06-27 19:46:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 19:46:37,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 19:46:37,126 INFO L175 Difference]: Start difference. First operand has 101 places, 132 transitions, 1205 flow. Second operand 8 states and 167 transitions. [2024-06-27 19:46:37,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 172 transitions, 1857 flow [2024-06-27 19:46:37,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 172 transitions, 1752 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:37,186 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1318 flow [2024-06-27 19:46:37,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1318, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-27 19:46:37,187 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-27 19:46:37,187 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1318 flow [2024-06-27 19:46:37,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:37,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:37,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:37,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:46:37,188 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:37,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:37,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1828416005, now seen corresponding path program 3 times [2024-06-27 19:46:37,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:37,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944149229] [2024-06-27 19:46:37,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:37,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:37,998 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 19:46:37,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944149229] [2024-06-27 19:46:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944149229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836991392] [2024-06-27 19:46:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:38,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:38,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:38,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:38,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:38,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:38,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1318 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:38,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:38,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:38,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:38,807 INFO L124 PetriNetUnfolderBase]: 2458/3701 cut-off events. [2024-06-27 19:46:38,807 INFO L125 PetriNetUnfolderBase]: For 73116/73119 co-relation queries the response was YES. [2024-06-27 19:46:38,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20274 conditions, 3701 events. 2458/3701 cut-off events. For 73116/73119 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18494 event pairs, 768 based on Foata normal form. 4/3702 useless extension candidates. Maximal degree in co-relation 20231. Up to 3254 conditions per place. [2024-06-27 19:46:38,828 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 101 selfloop transitions, 66 changer transitions 0/172 dead transitions. [2024-06-27 19:46:38,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 172 transitions, 1832 flow [2024-06-27 19:46:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:38,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 19:46:38,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-27 19:46:38,844 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1318 flow. Second operand 8 states and 167 transitions. [2024-06-27 19:46:38,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 172 transitions, 1832 flow [2024-06-27 19:46:38,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 172 transitions, 1696 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:38,904 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1324 flow [2024-06-27 19:46:38,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1324, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-27 19:46:38,905 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-27 19:46:38,905 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1324 flow [2024-06-27 19:46:38,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:38,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:38,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:38,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:46:38,906 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:38,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:38,906 INFO L85 PathProgramCache]: Analyzing trace with hash -247287692, now seen corresponding path program 3 times [2024-06-27 19:46:38,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:38,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384393038] [2024-06-27 19:46:38,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:38,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:39,716 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 19:46:39,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:39,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384393038] [2024-06-27 19:46:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384393038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:39,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275172418] [2024-06-27 19:46:39,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:39,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:39,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:39,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:39,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:39,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:39,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1324 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:39,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:39,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:39,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:40,727 INFO L124 PetriNetUnfolderBase]: 2469/3717 cut-off events. [2024-06-27 19:46:40,727 INFO L125 PetriNetUnfolderBase]: For 79110/79113 co-relation queries the response was YES. [2024-06-27 19:46:40,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20606 conditions, 3717 events. 2469/3717 cut-off events. For 79110/79113 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18536 event pairs, 824 based on Foata normal form. 4/3718 useless extension candidates. Maximal degree in co-relation 20562. Up to 3393 conditions per place. [2024-06-27 19:46:40,759 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 105 selfloop transitions, 61 changer transitions 0/171 dead transitions. [2024-06-27 19:46:40,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 171 transitions, 1867 flow [2024-06-27 19:46:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:40,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:46:40,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:46:40,761 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1324 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:46:40,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 171 transitions, 1867 flow [2024-06-27 19:46:40,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 171 transitions, 1724 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:40,833 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1346 flow [2024-06-27 19:46:40,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1346, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-27 19:46:40,834 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-27 19:46:40,834 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1346 flow [2024-06-27 19:46:40,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:40,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:40,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:40,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:46:40,835 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:40,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:40,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1733595455, now seen corresponding path program 4 times [2024-06-27 19:46:40,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:40,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214187646] [2024-06-27 19:46:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:40,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:41,580 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 19:46:41,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:41,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214187646] [2024-06-27 19:46:41,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214187646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:41,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:41,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:41,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15906143] [2024-06-27 19:46:41,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:41,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:41,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:41,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:41,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:41,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:41,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1346 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:41,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:41,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:41,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:42,559 INFO L124 PetriNetUnfolderBase]: 2523/3798 cut-off events. [2024-06-27 19:46:42,559 INFO L125 PetriNetUnfolderBase]: For 87542/87554 co-relation queries the response was YES. [2024-06-27 19:46:42,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21285 conditions, 3798 events. 2523/3798 cut-off events. For 87542/87554 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18970 event pairs, 766 based on Foata normal form. 12/3799 useless extension candidates. Maximal degree in co-relation 21240. Up to 3316 conditions per place. [2024-06-27 19:46:42,585 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 103 selfloop transitions, 72 changer transitions 0/180 dead transitions. [2024-06-27 19:46:42,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 180 transitions, 2044 flow [2024-06-27 19:46:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:42,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 19:46:42,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-27 19:46:42,586 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1346 flow. Second operand 8 states and 165 transitions. [2024-06-27 19:46:42,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 180 transitions, 2044 flow [2024-06-27 19:46:42,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 180 transitions, 1936 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:42,669 INFO L231 Difference]: Finished difference. Result has 112 places, 147 transitions, 1468 flow [2024-06-27 19:46:42,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1468, PETRI_PLACES=112, PETRI_TRANSITIONS=147} [2024-06-27 19:46:42,670 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-27 19:46:42,670 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 147 transitions, 1468 flow [2024-06-27 19:46:42,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:42,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:42,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:42,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:46:42,670 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:42,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1748738685, now seen corresponding path program 5 times [2024-06-27 19:46:42,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:42,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905783573] [2024-06-27 19:46:42,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:42,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:43,518 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 19:46:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905783573] [2024-06-27 19:46:43,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905783573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:43,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:43,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:43,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320820806] [2024-06-27 19:46:43,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:43,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:43,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:43,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:43,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:43,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 147 transitions, 1468 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:43,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:43,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:43,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:44,455 INFO L124 PetriNetUnfolderBase]: 2513/3784 cut-off events. [2024-06-27 19:46:44,455 INFO L125 PetriNetUnfolderBase]: For 94185/94197 co-relation queries the response was YES. [2024-06-27 19:46:44,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21564 conditions, 3784 events. 2513/3784 cut-off events. For 94185/94197 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18893 event pairs, 771 based on Foata normal form. 12/3785 useless extension candidates. Maximal degree in co-relation 21518. Up to 3308 conditions per place. [2024-06-27 19:46:44,478 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 91 selfloop transitions, 80 changer transitions 0/176 dead transitions. [2024-06-27 19:46:44,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 176 transitions, 1986 flow [2024-06-27 19:46:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:46:44,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:46:44,480 INFO L175 Difference]: Start difference. First operand has 112 places, 147 transitions, 1468 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:46:44,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 176 transitions, 1986 flow [2024-06-27 19:46:44,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 176 transitions, 1794 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:44,569 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1444 flow [2024-06-27 19:46:44,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1444, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-27 19:46:44,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-27 19:46:44,570 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1444 flow [2024-06-27 19:46:44,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:44,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:44,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:44,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:46:44,571 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:44,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:44,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1515786124, now seen corresponding path program 4 times [2024-06-27 19:46:44,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:44,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099724662] [2024-06-27 19:46:44,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:44,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:45,334 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 19:46:45,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099724662] [2024-06-27 19:46:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099724662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:45,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:45,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:45,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565445107] [2024-06-27 19:46:45,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:45,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:45,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:45,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:45,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:45,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:45,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1444 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:45,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:45,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:45,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:46,270 INFO L124 PetriNetUnfolderBase]: 2508/3784 cut-off events. [2024-06-27 19:46:46,270 INFO L125 PetriNetUnfolderBase]: For 99495/99498 co-relation queries the response was YES. [2024-06-27 19:46:46,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21750 conditions, 3784 events. 2508/3784 cut-off events. For 99495/99498 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18943 event pairs, 840 based on Foata normal form. 4/3775 useless extension candidates. Maximal degree in co-relation 21703. Up to 3452 conditions per place. [2024-06-27 19:46:46,296 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 105 selfloop transitions, 61 changer transitions 0/171 dead transitions. [2024-06-27 19:46:46,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 171 transitions, 1856 flow [2024-06-27 19:46:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 19:46:46,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-27 19:46:46,298 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1444 flow. Second operand 8 states and 155 transitions. [2024-06-27 19:46:46,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 171 transitions, 1856 flow [2024-06-27 19:46:46,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1660 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:46,397 INFO L231 Difference]: Finished difference. Result has 116 places, 147 transitions, 1380 flow [2024-06-27 19:46:46,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1380, PETRI_PLACES=116, PETRI_TRANSITIONS=147} [2024-06-27 19:46:46,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-27 19:46:46,398 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 147 transitions, 1380 flow [2024-06-27 19:46:46,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:46,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:46,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:46,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:46:46,399 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:46,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1739534475, now seen corresponding path program 6 times [2024-06-27 19:46:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:46,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826340408] [2024-06-27 19:46:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:46,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:47,135 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 19:46:47,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:47,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826340408] [2024-06-27 19:46:47,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826340408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:47,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:47,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:47,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923130596] [2024-06-27 19:46:47,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:47,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:47,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:47,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:47,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:47,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:47,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 147 transitions, 1380 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:47,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:47,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:47,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:48,066 INFO L124 PetriNetUnfolderBase]: 2498/3763 cut-off events. [2024-06-27 19:46:48,066 INFO L125 PetriNetUnfolderBase]: For 105640/105649 co-relation queries the response was YES. [2024-06-27 19:46:48,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21717 conditions, 3763 events. 2498/3763 cut-off events. For 105640/105649 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18754 event pairs, 762 based on Foata normal form. 10/3762 useless extension candidates. Maximal degree in co-relation 21669. Up to 3293 conditions per place. [2024-06-27 19:46:48,089 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 99 selfloop transitions, 73 changer transitions 0/177 dead transitions. [2024-06-27 19:46:48,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 177 transitions, 1820 flow [2024-06-27 19:46:48,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:46:48,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:46:48,091 INFO L175 Difference]: Start difference. First operand has 116 places, 147 transitions, 1380 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:46:48,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 177 transitions, 1820 flow [2024-06-27 19:46:48,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 177 transitions, 1594 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 19:46:48,190 INFO L231 Difference]: Finished difference. Result has 114 places, 147 transitions, 1310 flow [2024-06-27 19:46:48,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1310, PETRI_PLACES=114, PETRI_TRANSITIONS=147} [2024-06-27 19:46:48,190 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-27 19:46:48,190 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 147 transitions, 1310 flow [2024-06-27 19:46:48,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:46:48,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:48,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:48,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:46:48,191 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:48,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:48,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1749077298, now seen corresponding path program 1 times [2024-06-27 19:46:48,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:48,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213838096] [2024-06-27 19:46:48,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:48,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:49,363 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 19:46:49,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:49,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213838096] [2024-06-27 19:46:49,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213838096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:49,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:49,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:46:49,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81408184] [2024-06-27 19:46:49,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:49,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:46:49,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:49,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:46:49,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:46:49,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:46:49,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 147 transitions, 1310 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 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 19:46:49,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:49,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:46:49,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:50,096 INFO L124 PetriNetUnfolderBase]: 2071/3308 cut-off events. [2024-06-27 19:46:50,096 INFO L125 PetriNetUnfolderBase]: For 95352/95352 co-relation queries the response was YES. [2024-06-27 19:46:50,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18760 conditions, 3308 events. 2071/3308 cut-off events. For 95352/95352 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17668 event pairs, 669 based on Foata normal form. 4/3310 useless extension candidates. Maximal degree in co-relation 18712. Up to 2960 conditions per place. [2024-06-27 19:46:50,120 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 135 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2024-06-27 19:46:50,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 176 transitions, 1738 flow [2024-06-27 19:46:50,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:50,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:50,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 19:46:50,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-27 19:46:50,122 INFO L175 Difference]: Start difference. First operand has 114 places, 147 transitions, 1310 flow. Second operand 8 states and 163 transitions. [2024-06-27 19:46:50,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 176 transitions, 1738 flow [2024-06-27 19:46:50,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 176 transitions, 1539 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:50,235 INFO L231 Difference]: Finished difference. Result has 115 places, 152 transitions, 1214 flow [2024-06-27 19:46:50,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=115, PETRI_TRANSITIONS=152} [2024-06-27 19:46:50,236 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-27 19:46:50,236 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 152 transitions, 1214 flow [2024-06-27 19:46:50,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 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 19:46:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:50,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:50,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:46:50,236 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:50,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:50,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1783897120, now seen corresponding path program 1 times [2024-06-27 19:46:50,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:50,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809795886] [2024-06-27 19:46:50,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:50,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:51,086 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 19:46:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809795886] [2024-06-27 19:46:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809795886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:51,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:51,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:46:51,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131310100] [2024-06-27 19:46:51,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:51,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:46:51,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:46:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:46:51,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-27 19:46:51,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 152 transitions, 1214 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 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 19:46:51,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:51,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-27 19:46:51,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:51,552 INFO L124 PetriNetUnfolderBase]: 1832/3072 cut-off events. [2024-06-27 19:46:51,552 INFO L125 PetriNetUnfolderBase]: For 98274/98274 co-relation queries the response was YES. [2024-06-27 19:46:51,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17851 conditions, 3072 events. 1832/3072 cut-off events. For 98274/98274 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17322 event pairs, 641 based on Foata normal form. 2/3072 useless extension candidates. Maximal degree in co-relation 17801. Up to 2582 conditions per place. [2024-06-27 19:46:51,577 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2024-06-27 19:46:51,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 165 transitions, 1500 flow [2024-06-27 19:46:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:46:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:46:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 19:46:51,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 19:46:51,578 INFO L175 Difference]: Start difference. First operand has 115 places, 152 transitions, 1214 flow. Second operand 6 states and 129 transitions. [2024-06-27 19:46:51,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 165 transitions, 1500 flow [2024-06-27 19:46:51,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 165 transitions, 1441 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:51,673 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 1217 flow [2024-06-27 19:46:51,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1217, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2024-06-27 19:46:51,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-27 19:46:51,674 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 1217 flow [2024-06-27 19:46:51,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 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 19:46:51,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:51,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:51,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:46:51,675 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:51,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash -569192296, now seen corresponding path program 1 times [2024-06-27 19:46:51,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:51,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373762350] [2024-06-27 19:46:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:51,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:52,668 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 19:46:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:52,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373762350] [2024-06-27 19:46:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373762350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:52,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:52,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:52,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941853053] [2024-06-27 19:46:52,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:52,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:52,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:52,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:52,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:52,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:52,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 1217 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:52,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:52,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:52,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:53,584 INFO L124 PetriNetUnfolderBase]: 2492/3757 cut-off events. [2024-06-27 19:46:53,585 INFO L125 PetriNetUnfolderBase]: For 122878/122882 co-relation queries the response was YES. [2024-06-27 19:46:53,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22648 conditions, 3757 events. 2492/3757 cut-off events. For 122878/122882 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18748 event pairs, 762 based on Foata normal form. 6/3761 useless extension candidates. Maximal degree in co-relation 22597. Up to 3567 conditions per place. [2024-06-27 19:46:53,610 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 166 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2024-06-27 19:46:53,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 198 transitions, 1777 flow [2024-06-27 19:46:53,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:46:53,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 19:46:53,611 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 1217 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:46:53,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 198 transitions, 1777 flow [2024-06-27 19:46:53,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 198 transitions, 1737 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:46:53,723 INFO L231 Difference]: Finished difference. Result has 121 places, 158 transitions, 1287 flow [2024-06-27 19:46:53,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=121, PETRI_TRANSITIONS=158} [2024-06-27 19:46:53,723 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-27 19:46:53,723 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 158 transitions, 1287 flow [2024-06-27 19:46:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:53,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:53,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:53,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:46:53,724 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:53,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash 669184312, now seen corresponding path program 1 times [2024-06-27 19:46:53,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496103755] [2024-06-27 19:46:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:54,626 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 19:46:54,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:54,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496103755] [2024-06-27 19:46:54,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496103755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:54,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:54,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:54,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687776580] [2024-06-27 19:46:54,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:54,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:54,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:54,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:54,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 158 transitions, 1287 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:54,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:54,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:54,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:55,536 INFO L124 PetriNetUnfolderBase]: 2514/3794 cut-off events. [2024-06-27 19:46:55,537 INFO L125 PetriNetUnfolderBase]: For 132835/132842 co-relation queries the response was YES. [2024-06-27 19:46:55,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 3794 events. 2514/3794 cut-off events. For 132835/132842 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19125 event pairs, 687 based on Foata normal form. 8/3799 useless extension candidates. Maximal degree in co-relation 23450. Up to 3118 conditions per place. [2024-06-27 19:46:55,564 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 109 selfloop transitions, 92 changer transitions 0/206 dead transitions. [2024-06-27 19:46:55,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 206 transitions, 2021 flow [2024-06-27 19:46:55,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:55,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:55,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 19:46:55,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-27 19:46:55,566 INFO L175 Difference]: Start difference. First operand has 121 places, 158 transitions, 1287 flow. Second operand 9 states and 190 transitions. [2024-06-27 19:46:55,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 206 transitions, 2021 flow [2024-06-27 19:46:55,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 206 transitions, 1935 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:46:55,701 INFO L231 Difference]: Finished difference. Result has 123 places, 164 transitions, 1483 flow [2024-06-27 19:46:55,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1483, PETRI_PLACES=123, PETRI_TRANSITIONS=164} [2024-06-27 19:46:55,701 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-27 19:46:55,701 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 164 transitions, 1483 flow [2024-06-27 19:46:55,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:55,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:55,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:55,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:46:55,702 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:55,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:55,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1277022092, now seen corresponding path program 2 times [2024-06-27 19:46:55,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:55,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754822521] [2024-06-27 19:46:55,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:55,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:56,618 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 19:46:56,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:56,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754822521] [2024-06-27 19:46:56,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754822521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:56,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:56,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:56,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111220080] [2024-06-27 19:46:56,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:56,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:56,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:56,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:56,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:56,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:56,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 164 transitions, 1483 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:56,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:56,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:56,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:57,638 INFO L124 PetriNetUnfolderBase]: 2525/3807 cut-off events. [2024-06-27 19:46:57,639 INFO L125 PetriNetUnfolderBase]: For 142437/142444 co-relation queries the response was YES. [2024-06-27 19:46:57,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24501 conditions, 3807 events. 2525/3807 cut-off events. For 142437/142444 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19110 event pairs, 750 based on Foata normal form. 8/3812 useless extension candidates. Maximal degree in co-relation 24448. Up to 3424 conditions per place. [2024-06-27 19:46:57,666 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 124 selfloop transitions, 79 changer transitions 0/208 dead transitions. [2024-06-27 19:46:57,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 208 transitions, 2225 flow [2024-06-27 19:46:57,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:57,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 19:46:57,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 19:46:57,669 INFO L175 Difference]: Start difference. First operand has 123 places, 164 transitions, 1483 flow. Second operand 9 states and 183 transitions. [2024-06-27 19:46:57,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 208 transitions, 2225 flow [2024-06-27 19:46:57,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 208 transitions, 2085 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:57,829 INFO L231 Difference]: Finished difference. Result has 127 places, 170 transitions, 1615 flow [2024-06-27 19:46:57,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1615, PETRI_PLACES=127, PETRI_TRANSITIONS=170} [2024-06-27 19:46:57,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-27 19:46:57,830 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 170 transitions, 1615 flow [2024-06-27 19:46:57,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:57,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:57,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:57,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:46:57,831 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:57,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:57,831 INFO L85 PathProgramCache]: Analyzing trace with hash 751534012, now seen corresponding path program 2 times [2024-06-27 19:46:57,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:57,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032645550] [2024-06-27 19:46:57,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:57,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:58,672 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 19:46:58,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:58,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032645550] [2024-06-27 19:46:58,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032645550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:58,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:58,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:46:58,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803161000] [2024-06-27 19:46:58,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:58,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:46:58,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:58,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:46:58,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:46:58,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:46:58,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 170 transitions, 1615 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:46:58,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:58,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:46:58,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:59,721 INFO L124 PetriNetUnfolderBase]: 2579/3894 cut-off events. [2024-06-27 19:46:59,721 INFO L125 PetriNetUnfolderBase]: For 156039/156046 co-relation queries the response was YES. [2024-06-27 19:46:59,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25729 conditions, 3894 events. 2579/3894 cut-off events. For 156039/156046 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19643 event pairs, 685 based on Foata normal form. 8/3899 useless extension candidates. Maximal degree in co-relation 25674. Up to 3180 conditions per place. [2024-06-27 19:46:59,830 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 87 changer transitions 0/219 dead transitions. [2024-06-27 19:46:59,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2495 flow [2024-06-27 19:46:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:59,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 19:46:59,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-27 19:46:59,834 INFO L175 Difference]: Start difference. First operand has 127 places, 170 transitions, 1615 flow. Second operand 9 states and 190 transitions. [2024-06-27 19:46:59,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2495 flow [2024-06-27 19:47:00,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 219 transitions, 2366 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:00,018 INFO L231 Difference]: Finished difference. Result has 131 places, 176 transitions, 1740 flow [2024-06-27 19:47:00,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1740, PETRI_PLACES=131, PETRI_TRANSITIONS=176} [2024-06-27 19:47:00,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-27 19:47:00,029 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 176 transitions, 1740 flow [2024-06-27 19:47:00,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:00,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:00,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:00,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:47:00,029 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:00,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash 751527502, now seen corresponding path program 3 times [2024-06-27 19:47:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:00,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103357385] [2024-06-27 19:47:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:00,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:00,930 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 19:47:00,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:00,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103357385] [2024-06-27 19:47:00,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103357385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:00,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:00,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:00,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296515646] [2024-06-27 19:47:00,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:00,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:00,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:00,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:00,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:01,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:01,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 176 transitions, 1740 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:01,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:01,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:01,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:02,078 INFO L124 PetriNetUnfolderBase]: 2569/3880 cut-off events. [2024-06-27 19:47:02,078 INFO L125 PetriNetUnfolderBase]: For 163327/163334 co-relation queries the response was YES. [2024-06-27 19:47:02,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26106 conditions, 3880 events. 2569/3880 cut-off events. For 163327/163334 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19602 event pairs, 685 based on Foata normal form. 8/3885 useless extension candidates. Maximal degree in co-relation 26049. Up to 3172 conditions per place. [2024-06-27 19:47:02,105 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 86 changer transitions 0/218 dead transitions. [2024-06-27 19:47:02,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 218 transitions, 2430 flow [2024-06-27 19:47:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 19:47:02,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-27 19:47:02,107 INFO L175 Difference]: Start difference. First operand has 131 places, 176 transitions, 1740 flow. Second operand 9 states and 190 transitions. [2024-06-27 19:47:02,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 218 transitions, 2430 flow [2024-06-27 19:47:02,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 218 transitions, 2266 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:02,256 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1756 flow [2024-06-27 19:47:02,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1756, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-27 19:47:02,256 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-27 19:47:02,257 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1756 flow [2024-06-27 19:47:02,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:02,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:02,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:02,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:47:02,257 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:02,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash 751527316, now seen corresponding path program 3 times [2024-06-27 19:47:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:02,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095090543] [2024-06-27 19:47:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:03,111 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 19:47:03,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:03,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095090543] [2024-06-27 19:47:03,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095090543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:03,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:03,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:03,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425991788] [2024-06-27 19:47:03,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:03,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:03,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:03,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:03,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:03,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:03,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1756 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:03,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:03,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:03,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:04,153 INFO L124 PetriNetUnfolderBase]: 2580/3906 cut-off events. [2024-06-27 19:47:04,153 INFO L125 PetriNetUnfolderBase]: For 171745/171752 co-relation queries the response was YES. [2024-06-27 19:47:04,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26506 conditions, 3906 events. 2580/3906 cut-off events. For 171745/171752 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19759 event pairs, 756 based on Foata normal form. 8/3911 useless extension candidates. Maximal degree in co-relation 26448. Up to 3500 conditions per place. [2024-06-27 19:47:04,181 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 136 selfloop transitions, 75 changer transitions 0/216 dead transitions. [2024-06-27 19:47:04,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 216 transitions, 2470 flow [2024-06-27 19:47:04,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:04,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:04,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:47:04,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 19:47:04,183 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1756 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:47:04,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 216 transitions, 2470 flow [2024-06-27 19:47:04,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 216 transitions, 2288 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:04,369 INFO L231 Difference]: Finished difference. Result has 136 places, 179 transitions, 1776 flow [2024-06-27 19:47:04,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1776, PETRI_PLACES=136, PETRI_TRANSITIONS=179} [2024-06-27 19:47:04,370 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-27 19:47:04,370 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 179 transitions, 1776 flow [2024-06-27 19:47:04,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:04,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:04,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:04,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:47:04,371 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:04,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash 924254542, now seen corresponding path program 4 times [2024-06-27 19:47:04,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:04,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678661123] [2024-06-27 19:47:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:05,279 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 19:47:05,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:05,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678661123] [2024-06-27 19:47:05,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678661123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:05,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:05,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:05,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753345924] [2024-06-27 19:47:05,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:05,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:05,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:05,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:05,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:05,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 179 transitions, 1776 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:05,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:05,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:05,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:06,298 INFO L124 PetriNetUnfolderBase]: 2634/3984 cut-off events. [2024-06-27 19:47:06,299 INFO L125 PetriNetUnfolderBase]: For 184990/184993 co-relation queries the response was YES. [2024-06-27 19:47:06,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27185 conditions, 3984 events. 2634/3984 cut-off events. For 184990/184993 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20186 event pairs, 714 based on Foata normal form. 4/3985 useless extension candidates. Maximal degree in co-relation 27126. Up to 3234 conditions per place. [2024-06-27 19:47:06,328 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 92 changer transitions 0/224 dead transitions. [2024-06-27 19:47:06,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 224 transitions, 2678 flow [2024-06-27 19:47:06,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 19:47:06,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-27 19:47:06,330 INFO L175 Difference]: Start difference. First operand has 136 places, 179 transitions, 1776 flow. Second operand 9 states and 188 transitions. [2024-06-27 19:47:06,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 224 transitions, 2678 flow [2024-06-27 19:47:06,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 224 transitions, 2535 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:06,594 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1903 flow [2024-06-27 19:47:06,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1903, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2024-06-27 19:47:06,594 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-27 19:47:06,595 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1903 flow [2024-06-27 19:47:06,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:06,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:06,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:06,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:47:06,595 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:06,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:06,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1270586306, now seen corresponding path program 5 times [2024-06-27 19:47:06,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:06,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297096901] [2024-06-27 19:47:06,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:06,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:06,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:07,411 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 19:47:07,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:07,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297096901] [2024-06-27 19:47:07,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297096901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:07,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:07,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47758682] [2024-06-27 19:47:07,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:07,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:07,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:07,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:07,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1903 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:07,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:07,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:07,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:08,463 INFO L124 PetriNetUnfolderBase]: 2656/4016 cut-off events. [2024-06-27 19:47:08,463 INFO L125 PetriNetUnfolderBase]: For 196072/196075 co-relation queries the response was YES. [2024-06-27 19:47:08,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27800 conditions, 4016 events. 2656/4016 cut-off events. For 196072/196075 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20389 event pairs, 709 based on Foata normal form. 4/4017 useless extension candidates. Maximal degree in co-relation 27740. Up to 3253 conditions per place. [2024-06-27 19:47:08,493 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 134 selfloop transitions, 90 changer transitions 0/229 dead transitions. [2024-06-27 19:47:08,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 229 transitions, 2800 flow [2024-06-27 19:47:08,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:08,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-27 19:47:08,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4823232323232323 [2024-06-27 19:47:08,495 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1903 flow. Second operand 9 states and 191 transitions. [2024-06-27 19:47:08,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 229 transitions, 2800 flow [2024-06-27 19:47:08,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 229 transitions, 2650 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:08,757 INFO L231 Difference]: Finished difference. Result has 143 places, 188 transitions, 1986 flow [2024-06-27 19:47:08,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1986, PETRI_PLACES=143, PETRI_TRANSITIONS=188} [2024-06-27 19:47:08,758 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-27 19:47:08,758 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 188 transitions, 1986 flow [2024-06-27 19:47:08,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:08,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:08,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:08,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:47:08,759 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:08,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:08,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1270592816, now seen corresponding path program 6 times [2024-06-27 19:47:08,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:08,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996899730] [2024-06-27 19:47:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:08,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:09,671 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 19:47:09,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:09,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996899730] [2024-06-27 19:47:09,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996899730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:09,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:09,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:09,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694636654] [2024-06-27 19:47:09,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:09,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:09,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:09,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:09,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:09,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:09,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 188 transitions, 1986 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:09,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:09,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:09,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:10,715 INFO L124 PetriNetUnfolderBase]: 2646/4007 cut-off events. [2024-06-27 19:47:10,716 INFO L125 PetriNetUnfolderBase]: For 204590/204593 co-relation queries the response was YES. [2024-06-27 19:47:10,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27889 conditions, 4007 events. 2646/4007 cut-off events. For 204590/204593 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20343 event pairs, 707 based on Foata normal form. 4/4008 useless extension candidates. Maximal degree in co-relation 27828. Up to 3245 conditions per place. [2024-06-27 19:47:10,747 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 131 selfloop transitions, 91 changer transitions 0/227 dead transitions. [2024-06-27 19:47:10,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 227 transitions, 2698 flow [2024-06-27 19:47:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:10,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:10,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-27 19:47:10,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-27 19:47:10,749 INFO L175 Difference]: Start difference. First operand has 143 places, 188 transitions, 1986 flow. Second operand 9 states and 188 transitions. [2024-06-27 19:47:10,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 227 transitions, 2698 flow [2024-06-27 19:47:10,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 227 transitions, 2459 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:10,989 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 1937 flow [2024-06-27 19:47:10,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1937, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-06-27 19:47:10,990 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-27 19:47:10,990 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 1937 flow [2024-06-27 19:47:10,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:10,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:10,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:10,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:47:10,991 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:10,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:10,991 INFO L85 PathProgramCache]: Analyzing trace with hash 924017206, now seen corresponding path program 4 times [2024-06-27 19:47:10,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:10,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279304911] [2024-06-27 19:47:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:10,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:11,746 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 19:47:11,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:11,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279304911] [2024-06-27 19:47:11,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279304911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:11,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:11,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379546795] [2024-06-27 19:47:11,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:11,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:11,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:11,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:11,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 1937 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:11,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:11,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:11,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:12,677 INFO L124 PetriNetUnfolderBase]: 2657/4023 cut-off events. [2024-06-27 19:47:12,677 INFO L125 PetriNetUnfolderBase]: For 213298/213301 co-relation queries the response was YES. [2024-06-27 19:47:12,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28200 conditions, 4023 events. 2657/4023 cut-off events. For 213298/213301 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20397 event pairs, 768 based on Foata normal form. 4/4024 useless extension candidates. Maximal degree in co-relation 28138. Up to 3608 conditions per place. [2024-06-27 19:47:12,706 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 145 selfloop transitions, 75 changer transitions 0/225 dead transitions. [2024-06-27 19:47:12,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 225 transitions, 2676 flow [2024-06-27 19:47:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:12,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:47:12,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-27 19:47:12,708 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 1937 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:47:12,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 225 transitions, 2676 flow [2024-06-27 19:47:12,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 225 transitions, 2488 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:12,978 INFO L231 Difference]: Finished difference. Result has 146 places, 191 transitions, 1954 flow [2024-06-27 19:47:12,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1749, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1954, PETRI_PLACES=146, PETRI_TRANSITIONS=191} [2024-06-27 19:47:12,980 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-27 19:47:12,980 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 191 transitions, 1954 flow [2024-06-27 19:47:12,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:12,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:12,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:12,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:47:12,981 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:12,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:12,981 INFO L85 PathProgramCache]: Analyzing trace with hash 519464384, now seen corresponding path program 1 times [2024-06-27 19:47:12,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:12,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590732848] [2024-06-27 19:47:12,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:12,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:13,708 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 19:47:13,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:13,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590732848] [2024-06-27 19:47:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590732848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:13,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:13,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:47:13,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398294875] [2024-06-27 19:47:13,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:13,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:47:13,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:13,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:47:13,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:47:13,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:47:13,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 191 transitions, 1954 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 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 19:47:13,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:13,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:47:13,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:14,389 INFO L124 PetriNetUnfolderBase]: 2195/3552 cut-off events. [2024-06-27 19:47:14,390 INFO L125 PetriNetUnfolderBase]: For 221114/221118 co-relation queries the response was YES. [2024-06-27 19:47:14,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25709 conditions, 3552 events. 2195/3552 cut-off events. For 221114/221118 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19787 event pairs, 708 based on Foata normal form. 5/3551 useless extension candidates. Maximal degree in co-relation 25646. Up to 3040 conditions per place. [2024-06-27 19:47:14,417 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 136 selfloop transitions, 13 changer transitions 0/210 dead transitions. [2024-06-27 19:47:14,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 210 transitions, 2334 flow [2024-06-27 19:47:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:47:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:47:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-27 19:47:14,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-27 19:47:14,419 INFO L175 Difference]: Start difference. First operand has 146 places, 191 transitions, 1954 flow. Second operand 6 states and 129 transitions. [2024-06-27 19:47:14,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 210 transitions, 2334 flow [2024-06-27 19:47:14,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 210 transitions, 2186 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:14,641 INFO L231 Difference]: Finished difference. Result has 146 places, 194 transitions, 1873 flow [2024-06-27 19:47:14,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1873, PETRI_PLACES=146, PETRI_TRANSITIONS=194} [2024-06-27 19:47:14,642 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-27 19:47:14,642 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 194 transitions, 1873 flow [2024-06-27 19:47:14,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 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 19:47:14,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:14,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:47:14,643 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:14,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash 540608684, now seen corresponding path program 7 times [2024-06-27 19:47:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:14,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613562248] [2024-06-27 19:47:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:14,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:15,544 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 19:47:15,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:15,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613562248] [2024-06-27 19:47:15,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613562248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:15,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:15,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454842345] [2024-06-27 19:47:15,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:15,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:15,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:15,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:15,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 194 transitions, 1873 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:15,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:15,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:15,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:16,649 INFO L124 PetriNetUnfolderBase]: 2684/4067 cut-off events. [2024-06-27 19:47:16,649 INFO L125 PetriNetUnfolderBase]: For 235618/235621 co-relation queries the response was YES. [2024-06-27 19:47:16,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28921 conditions, 4067 events. 2684/4067 cut-off events. For 235618/235621 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20740 event pairs, 721 based on Foata normal form. 6/4060 useless extension candidates. Maximal degree in co-relation 28857. Up to 3287 conditions per place. [2024-06-27 19:47:16,682 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 122 selfloop transitions, 104 changer transitions 0/231 dead transitions. [2024-06-27 19:47:16,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 231 transitions, 2625 flow [2024-06-27 19:47:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:16,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:47:16,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 19:47:16,683 INFO L175 Difference]: Start difference. First operand has 146 places, 194 transitions, 1873 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:47:16,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 231 transitions, 2625 flow [2024-06-27 19:47:16,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 231 transitions, 2582 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:16,971 INFO L231 Difference]: Finished difference. Result has 151 places, 197 transitions, 2088 flow [2024-06-27 19:47:16,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2088, PETRI_PLACES=151, PETRI_TRANSITIONS=197} [2024-06-27 19:47:16,972 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-27 19:47:16,972 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 197 transitions, 2088 flow [2024-06-27 19:47:16,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:16,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:16,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:16,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:47:16,973 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:16,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:16,973 INFO L85 PathProgramCache]: Analyzing trace with hash 219306232, now seen corresponding path program 8 times [2024-06-27 19:47:16,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:16,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047813046] [2024-06-27 19:47:16,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:17,982 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 19:47:17,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:17,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047813046] [2024-06-27 19:47:17,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047813046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:17,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:17,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:17,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23699989] [2024-06-27 19:47:17,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:17,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:17,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:17,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:17,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:18,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:18,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 197 transitions, 2088 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:18,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:18,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:18,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:19,035 INFO L124 PetriNetUnfolderBase]: 2738/4150 cut-off events. [2024-06-27 19:47:19,036 INFO L125 PetriNetUnfolderBase]: For 252138/252141 co-relation queries the response was YES. [2024-06-27 19:47:19,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30210 conditions, 4150 events. 2738/4150 cut-off events. For 252138/252141 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 21153 event pairs, 709 based on Foata normal form. 6/4143 useless extension candidates. Maximal degree in co-relation 30145. Up to 3333 conditions per place. [2024-06-27 19:47:19,069 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 137 selfloop transitions, 100 changer transitions 0/242 dead transitions. [2024-06-27 19:47:19,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 242 transitions, 3094 flow [2024-06-27 19:47:19,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-27 19:47:19,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-27 19:47:19,071 INFO L175 Difference]: Start difference. First operand has 151 places, 197 transitions, 2088 flow. Second operand 9 states and 186 transitions. [2024-06-27 19:47:19,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 242 transitions, 3094 flow [2024-06-27 19:47:19,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 242 transitions, 2906 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:19,334 INFO L231 Difference]: Finished difference. Result has 154 places, 203 transitions, 2204 flow [2024-06-27 19:47:19,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2204, PETRI_PLACES=154, PETRI_TRANSITIONS=203} [2024-06-27 19:47:19,335 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-27 19:47:19,335 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 203 transitions, 2204 flow [2024-06-27 19:47:19,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:19,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:19,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:19,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:47:19,336 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:19,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:19,336 INFO L85 PathProgramCache]: Analyzing trace with hash 255508814, now seen corresponding path program 9 times [2024-06-27 19:47:19,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:19,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387614912] [2024-06-27 19:47:19,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:19,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:20,199 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 19:47:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:20,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387614912] [2024-06-27 19:47:20,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387614912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:20,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:20,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:20,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535882770] [2024-06-27 19:47:20,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:20,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:20,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:20,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:20,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:20,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:20,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 203 transitions, 2204 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:20,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:20,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:20,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:21,193 INFO L124 PetriNetUnfolderBase]: 2728/4131 cut-off events. [2024-06-27 19:47:21,193 INFO L125 PetriNetUnfolderBase]: For 261049/261052 co-relation queries the response was YES. [2024-06-27 19:47:21,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30239 conditions, 4131 events. 2728/4131 cut-off events. For 261049/261052 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 21001 event pairs, 716 based on Foata normal form. 6/4124 useless extension candidates. Maximal degree in co-relation 30173. Up to 3325 conditions per place. [2024-06-27 19:47:21,230 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 135 selfloop transitions, 99 changer transitions 0/239 dead transitions. [2024-06-27 19:47:21,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 239 transitions, 2948 flow [2024-06-27 19:47:21,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:21,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-27 19:47:21,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-27 19:47:21,232 INFO L175 Difference]: Start difference. First operand has 154 places, 203 transitions, 2204 flow. Second operand 9 states and 185 transitions. [2024-06-27 19:47:21,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 239 transitions, 2948 flow [2024-06-27 19:47:21,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 239 transitions, 2643 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:21,482 INFO L231 Difference]: Finished difference. Result has 156 places, 203 transitions, 2105 flow [2024-06-27 19:47:21,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1899, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2105, PETRI_PLACES=156, PETRI_TRANSITIONS=203} [2024-06-27 19:47:21,483 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-27 19:47:21,483 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 203 transitions, 2105 flow [2024-06-27 19:47:21,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:21,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:21,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:21,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:47:21,484 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:21,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash 255271664, now seen corresponding path program 10 times [2024-06-27 19:47:21,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:21,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720518430] [2024-06-27 19:47:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:21,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:22,367 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 19:47:22,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:22,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720518430] [2024-06-27 19:47:22,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720518430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:22,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:22,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:22,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218432884] [2024-06-27 19:47:22,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:22,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:22,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:22,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:22,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 203 transitions, 2105 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:22,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:22,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:23,267 INFO L124 PetriNetUnfolderBase]: 2718/4117 cut-off events. [2024-06-27 19:47:23,267 INFO L125 PetriNetUnfolderBase]: For 267924/267927 co-relation queries the response was YES. [2024-06-27 19:47:23,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30202 conditions, 4117 events. 2718/4117 cut-off events. For 267924/267927 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 20988 event pairs, 707 based on Foata normal form. 6/4110 useless extension candidates. Maximal degree in co-relation 30135. Up to 3317 conditions per place. [2024-06-27 19:47:23,301 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 131 selfloop transitions, 102 changer transitions 0/238 dead transitions. [2024-06-27 19:47:23,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 238 transitions, 2691 flow [2024-06-27 19:47:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:47:23,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-27 19:47:23,307 INFO L175 Difference]: Start difference. First operand has 156 places, 203 transitions, 2105 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:47:23,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 238 transitions, 2691 flow [2024-06-27 19:47:23,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 238 transitions, 2390 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-27 19:47:23,598 INFO L231 Difference]: Finished difference. Result has 156 places, 203 transitions, 2016 flow [2024-06-27 19:47:23,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2016, PETRI_PLACES=156, PETRI_TRANSITIONS=203} [2024-06-27 19:47:23,599 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-27 19:47:23,599 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 203 transitions, 2016 flow [2024-06-27 19:47:23,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:23,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:23,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:23,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:47:23,600 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:23,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash 255271478, now seen corresponding path program 5 times [2024-06-27 19:47:23,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:23,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108924838] [2024-06-27 19:47:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:24,416 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 19:47:24,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:24,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108924838] [2024-06-27 19:47:24,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108924838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:24,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:24,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:24,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563212774] [2024-06-27 19:47:24,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:24,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:24,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:24,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:24,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:24,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:24,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 203 transitions, 2016 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:24,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:24,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:24,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:25,507 INFO L124 PetriNetUnfolderBase]: 2713/4113 cut-off events. [2024-06-27 19:47:25,508 INFO L125 PetriNetUnfolderBase]: For 275776/275776 co-relation queries the response was YES. [2024-06-27 19:47:25,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30281 conditions, 4113 events. 2713/4113 cut-off events. For 275776/275776 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 20880 event pairs, 793 based on Foata normal form. 2/4100 useless extension candidates. Maximal degree in co-relation 30213. Up to 3692 conditions per place. [2024-06-27 19:47:25,541 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 151 selfloop transitions, 75 changer transitions 0/231 dead transitions. [2024-06-27 19:47:25,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 231 transitions, 2560 flow [2024-06-27 19:47:25,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:25,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 19:47:25,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 19:47:25,545 INFO L175 Difference]: Start difference. First operand has 156 places, 203 transitions, 2016 flow. Second operand 9 states and 174 transitions. [2024-06-27 19:47:25,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 231 transitions, 2560 flow [2024-06-27 19:47:25,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 231 transitions, 2274 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-27 19:47:25,859 INFO L231 Difference]: Finished difference. Result has 156 places, 203 transitions, 1888 flow [2024-06-27 19:47:25,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1888, PETRI_PLACES=156, PETRI_TRANSITIONS=203} [2024-06-27 19:47:25,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-27 19:47:25,861 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 203 transitions, 1888 flow [2024-06-27 19:47:25,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 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 19:47:25,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:25,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:25,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:47:25,861 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:25,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash 989880654, now seen corresponding path program 2 times [2024-06-27 19:47:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933865329] [2024-06-27 19:47:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:26,582 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 19:47:26,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:26,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933865329] [2024-06-27 19:47:26,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933865329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:26,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:26,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:47:26,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591846849] [2024-06-27 19:47:26,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:26,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:47:26,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:26,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:47:26,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:47:26,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:47:26,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 203 transitions, 1888 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 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 19:47:26,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:26,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:47:26,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:27,233 INFO L124 PetriNetUnfolderBase]: 2212/3594 cut-off events. [2024-06-27 19:47:27,233 INFO L125 PetriNetUnfolderBase]: For 283326/283341 co-relation queries the response was YES. [2024-06-27 19:47:27,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27353 conditions, 3594 events. 2212/3594 cut-off events. For 283326/283341 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20190 event pairs, 711 based on Foata normal form. 11/3593 useless extension candidates. Maximal degree in co-relation 27284. Up to 3051 conditions per place. [2024-06-27 19:47:27,264 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 135 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2024-06-27 19:47:27,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 217 transitions, 2266 flow [2024-06-27 19:47:27,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:47:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:47:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-27 19:47:27,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-27 19:47:27,266 INFO L175 Difference]: Start difference. First operand has 156 places, 203 transitions, 1888 flow. Second operand 6 states and 125 transitions. [2024-06-27 19:47:27,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 217 transitions, 2266 flow [2024-06-27 19:47:27,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 217 transitions, 2010 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-27 19:47:27,487 INFO L231 Difference]: Finished difference. Result has 152 places, 206 transitions, 1714 flow [2024-06-27 19:47:27,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1714, PETRI_PLACES=152, PETRI_TRANSITIONS=206} [2024-06-27 19:47:27,487 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-27 19:47:27,487 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 206 transitions, 1714 flow [2024-06-27 19:47:27,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 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 19:47:27,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:27,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:27,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:47:27,488 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:27,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:27,488 INFO L85 PathProgramCache]: Analyzing trace with hash 533519970, now seen corresponding path program 1 times [2024-06-27 19:47:27,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:27,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481606051] [2024-06-27 19:47:27,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:27,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:28,123 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 19:47:28,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:28,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481606051] [2024-06-27 19:47:28,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481606051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:28,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:28,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:47:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124946041] [2024-06-27 19:47:28,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:47:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:28,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:47:28,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:47:28,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:47:28,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 206 transitions, 1714 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 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 19:47:28,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:28,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:47:28,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:28,791 INFO L124 PetriNetUnfolderBase]: 2243/3607 cut-off events. [2024-06-27 19:47:28,792 INFO L125 PetriNetUnfolderBase]: For 251209/251209 co-relation queries the response was YES. [2024-06-27 19:47:28,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26259 conditions, 3607 events. 2243/3607 cut-off events. For 251209/251209 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19600 event pairs, 641 based on Foata normal form. 1/3585 useless extension candidates. Maximal degree in co-relation 26189. Up to 3248 conditions per place. [2024-06-27 19:47:28,825 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 185 selfloop transitions, 11 changer transitions 0/221 dead transitions. [2024-06-27 19:47:28,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 221 transitions, 2178 flow [2024-06-27 19:47:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:47:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:47:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-27 19:47:28,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 19:47:28,826 INFO L175 Difference]: Start difference. First operand has 152 places, 206 transitions, 1714 flow. Second operand 6 states and 121 transitions. [2024-06-27 19:47:28,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 221 transitions, 2178 flow [2024-06-27 19:47:29,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 221 transitions, 2118 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:29,075 INFO L231 Difference]: Finished difference. Result has 154 places, 209 transitions, 1724 flow [2024-06-27 19:47:29,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1724, PETRI_PLACES=154, PETRI_TRANSITIONS=209} [2024-06-27 19:47:29,076 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-27 19:47:29,076 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 209 transitions, 1724 flow [2024-06-27 19:47:29,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 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 19:47:29,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:29,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:29,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:47:29,077 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:29,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:29,077 INFO L85 PathProgramCache]: Analyzing trace with hash 533757120, now seen corresponding path program 2 times [2024-06-27 19:47:29,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:29,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729396118] [2024-06-27 19:47:29,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:29,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:29,808 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 19:47:29,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:29,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729396118] [2024-06-27 19:47:29,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729396118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:29,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:29,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:47:29,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668460322] [2024-06-27 19:47:29,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:29,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:47:29,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:29,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:47:29,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:47:29,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:47:29,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 209 transitions, 1724 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 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 19:47:29,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:29,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:47:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:30,389 INFO L124 PetriNetUnfolderBase]: 2240/3604 cut-off events. [2024-06-27 19:47:30,390 INFO L125 PetriNetUnfolderBase]: For 259558/259561 co-relation queries the response was YES. [2024-06-27 19:47:30,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26695 conditions, 3604 events. 2240/3604 cut-off events. For 259558/259561 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 19638 event pairs, 645 based on Foata normal form. 3/3583 useless extension candidates. Maximal degree in co-relation 26624. Up to 3238 conditions per place. [2024-06-27 19:47:30,424 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 180 selfloop transitions, 16 changer transitions 0/221 dead transitions. [2024-06-27 19:47:30,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 221 transitions, 2184 flow [2024-06-27 19:47:30,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:47:30,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:47:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 19:47:30,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:47:30,425 INFO L175 Difference]: Start difference. First operand has 154 places, 209 transitions, 1724 flow. Second operand 6 states and 120 transitions. [2024-06-27 19:47:30,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 221 transitions, 2184 flow [2024-06-27 19:47:30,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 221 transitions, 2136 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:30,710 INFO L231 Difference]: Finished difference. Result has 156 places, 212 transitions, 1762 flow [2024-06-27 19:47:30,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1762, PETRI_PLACES=156, PETRI_TRANSITIONS=212} [2024-06-27 19:47:30,711 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-27 19:47:30,711 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 212 transitions, 1762 flow [2024-06-27 19:47:30,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 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 19:47:30,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:30,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:30,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:47:30,712 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:30,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:30,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1674901968, now seen corresponding path program 1 times [2024-06-27 19:47:30,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:30,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916781946] [2024-06-27 19:47:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:30,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:31,700 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 19:47:31,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:31,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916781946] [2024-06-27 19:47:31,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916781946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:31,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:31,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:31,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961203191] [2024-06-27 19:47:31,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:31,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:31,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:31,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:31,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:31,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:31,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 212 transitions, 1762 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:31,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:31,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:31,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:32,743 INFO L124 PetriNetUnfolderBase]: 2734/4152 cut-off events. [2024-06-27 19:47:32,743 INFO L125 PetriNetUnfolderBase]: For 322701/322705 co-relation queries the response was YES. [2024-06-27 19:47:32,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31787 conditions, 4152 events. 2734/4152 cut-off events. For 322701/322705 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 21273 event pairs, 759 based on Foata normal form. 8/4158 useless extension candidates. Maximal degree in co-relation 31715. Up to 3902 conditions per place. [2024-06-27 19:47:32,783 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 225 selfloop transitions, 30 changer transitions 0/260 dead transitions. [2024-06-27 19:47:32,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 260 transitions, 2472 flow [2024-06-27 19:47:32,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:32,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:32,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:47:32,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 19:47:32,792 INFO L175 Difference]: Start difference. First operand has 156 places, 212 transitions, 1762 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:47:32,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 260 transitions, 2472 flow [2024-06-27 19:47:33,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 2408 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-27 19:47:33,242 INFO L231 Difference]: Finished difference. Result has 162 places, 215 transitions, 1824 flow [2024-06-27 19:47:33,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1824, PETRI_PLACES=162, PETRI_TRANSITIONS=215} [2024-06-27 19:47:33,243 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 117 predicate places. [2024-06-27 19:47:33,243 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 215 transitions, 1824 flow [2024-06-27 19:47:33,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:33,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:33,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:33,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:47:33,244 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:33,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1735299326, now seen corresponding path program 2 times [2024-06-27 19:47:33,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:33,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40193882] [2024-06-27 19:47:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:33,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:34,187 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 19:47:34,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40193882] [2024-06-27 19:47:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40193882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:34,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:34,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:34,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770811573] [2024-06-27 19:47:34,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:34,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:34,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:34,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:34,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:34,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:34,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 215 transitions, 1824 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:34,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:34,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:34,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:35,415 INFO L124 PetriNetUnfolderBase]: 2788/4245 cut-off events. [2024-06-27 19:47:35,415 INFO L125 PetriNetUnfolderBase]: For 341927/341934 co-relation queries the response was YES. [2024-06-27 19:47:35,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33208 conditions, 4245 events. 2788/4245 cut-off events. For 341927/341934 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21986 event pairs, 657 based on Foata normal form. 8/4250 useless extension candidates. Maximal degree in co-relation 33135. Up to 3170 conditions per place. [2024-06-27 19:47:35,456 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 139 selfloop transitions, 129 changer transitions 0/273 dead transitions. [2024-06-27 19:47:35,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 273 transitions, 3050 flow [2024-06-27 19:47:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:35,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 19:47:35,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-27 19:47:35,458 INFO L175 Difference]: Start difference. First operand has 162 places, 215 transitions, 1824 flow. Second operand 10 states and 213 transitions. [2024-06-27 19:47:35,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 273 transitions, 3050 flow [2024-06-27 19:47:35,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 273 transitions, 2948 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 19:47:35,900 INFO L231 Difference]: Finished difference. Result has 164 places, 224 transitions, 2168 flow [2024-06-27 19:47:35,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1722, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2168, PETRI_PLACES=164, PETRI_TRANSITIONS=224} [2024-06-27 19:47:35,900 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 119 predicate places. [2024-06-27 19:47:35,900 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 224 transitions, 2168 flow [2024-06-27 19:47:35,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:35,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:35,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:35,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:47:35,901 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:35,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:35,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1678621038, now seen corresponding path program 3 times [2024-06-27 19:47:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:35,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791823894] [2024-06-27 19:47:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:35,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:35,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:36,871 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 19:47:36,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:36,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791823894] [2024-06-27 19:47:36,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791823894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:36,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:36,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:36,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123879698] [2024-06-27 19:47:36,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:36,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:36,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:36,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:36,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:36,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:36,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 224 transitions, 2168 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:36,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:36,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:36,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:38,125 INFO L124 PetriNetUnfolderBase]: 2778/4231 cut-off events. [2024-06-27 19:47:38,125 INFO L125 PetriNetUnfolderBase]: For 354460/354467 co-relation queries the response was YES. [2024-06-27 19:47:38,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33904 conditions, 4231 events. 2778/4231 cut-off events. For 354460/354467 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 21878 event pairs, 655 based on Foata normal form. 8/4236 useless extension candidates. Maximal degree in co-relation 33830. Up to 3162 conditions per place. [2024-06-27 19:47:38,164 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 139 selfloop transitions, 128 changer transitions 0/272 dead transitions. [2024-06-27 19:47:38,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 272 transitions, 3042 flow [2024-06-27 19:47:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 19:47:38,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-27 19:47:38,170 INFO L175 Difference]: Start difference. First operand has 164 places, 224 transitions, 2168 flow. Second operand 10 states and 213 transitions. [2024-06-27 19:47:38,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 272 transitions, 3042 flow [2024-06-27 19:47:38,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 272 transitions, 2838 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:38,721 INFO L231 Difference]: Finished difference. Result has 169 places, 224 transitions, 2228 flow [2024-06-27 19:47:38,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2228, PETRI_PLACES=169, PETRI_TRANSITIONS=224} [2024-06-27 19:47:38,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-27 19:47:38,721 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 224 transitions, 2228 flow [2024-06-27 19:47:38,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:38,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:38,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:38,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:47:38,727 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:38,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:38,728 INFO L85 PathProgramCache]: Analyzing trace with hash -586029402, now seen corresponding path program 4 times [2024-06-27 19:47:38,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:38,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696233315] [2024-06-27 19:47:38,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:38,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:39,711 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 19:47:39,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696233315] [2024-06-27 19:47:39,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696233315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:39,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:39,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:39,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438101753] [2024-06-27 19:47:39,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:39,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:39,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:39,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:39,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:39,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 224 transitions, 2228 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:39,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:39,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:39,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:40,904 INFO L124 PetriNetUnfolderBase]: 2832/4328 cut-off events. [2024-06-27 19:47:40,904 INFO L125 PetriNetUnfolderBase]: For 372683/372690 co-relation queries the response was YES. [2024-06-27 19:47:40,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35174 conditions, 4328 events. 2832/4328 cut-off events. For 372683/372690 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 22580 event pairs, 673 based on Foata normal form. 8/4333 useless extension candidates. Maximal degree in co-relation 35098. Up to 3208 conditions per place. [2024-06-27 19:47:40,947 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 148 selfloop transitions, 125 changer transitions 0/278 dead transitions. [2024-06-27 19:47:40,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 278 transitions, 3422 flow [2024-06-27 19:47:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 19:47:40,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-27 19:47:40,973 INFO L175 Difference]: Start difference. First operand has 169 places, 224 transitions, 2228 flow. Second operand 10 states and 211 transitions. [2024-06-27 19:47:40,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 278 transitions, 3422 flow [2024-06-27 19:47:41,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 278 transitions, 3136 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:47:41,540 INFO L231 Difference]: Finished difference. Result has 170 places, 230 transitions, 2316 flow [2024-06-27 19:47:41,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1954, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2316, PETRI_PLACES=170, PETRI_TRANSITIONS=230} [2024-06-27 19:47:41,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-27 19:47:41,541 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 230 transitions, 2316 flow [2024-06-27 19:47:41,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:41,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:41,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:41,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:47:41,542 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:41,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1614170264, now seen corresponding path program 5 times [2024-06-27 19:47:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:41,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281222220] [2024-06-27 19:47:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:41,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:42,557 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 19:47:42,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:42,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281222220] [2024-06-27 19:47:42,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281222220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:42,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:42,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:42,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571234786] [2024-06-27 19:47:42,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:42,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:42,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:42,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:42,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:42,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:42,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 230 transitions, 2316 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:42,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:42,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:42,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:43,889 INFO L124 PetriNetUnfolderBase]: 2854/4365 cut-off events. [2024-06-27 19:47:43,889 INFO L125 PetriNetUnfolderBase]: For 387518/387525 co-relation queries the response was YES. [2024-06-27 19:47:43,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35607 conditions, 4365 events. 2854/4365 cut-off events. For 387518/387525 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22894 event pairs, 668 based on Foata normal form. 8/4370 useless extension candidates. Maximal degree in co-relation 35530. Up to 3227 conditions per place. [2024-06-27 19:47:43,929 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 152 selfloop transitions, 125 changer transitions 0/282 dead transitions. [2024-06-27 19:47:43,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 282 transitions, 3472 flow [2024-06-27 19:47:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:43,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:43,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-27 19:47:43,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-27 19:47:43,931 INFO L175 Difference]: Start difference. First operand has 170 places, 230 transitions, 2316 flow. Second operand 10 states and 214 transitions. [2024-06-27 19:47:43,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 282 transitions, 3472 flow [2024-06-27 19:47:44,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 282 transitions, 3256 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:44,455 INFO L231 Difference]: Finished difference. Result has 174 places, 233 transitions, 2416 flow [2024-06-27 19:47:44,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2109, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2416, PETRI_PLACES=174, PETRI_TRANSITIONS=233} [2024-06-27 19:47:44,456 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 129 predicate places. [2024-06-27 19:47:44,456 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 233 transitions, 2416 flow [2024-06-27 19:47:44,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:44,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:44,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:44,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:47:44,457 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:44,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:44,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1614175844, now seen corresponding path program 6 times [2024-06-27 19:47:44,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:44,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680001646] [2024-06-27 19:47:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:44,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:45,543 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 19:47:45,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680001646] [2024-06-27 19:47:45,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680001646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:45,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:45,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391722630] [2024-06-27 19:47:45,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:45,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:45,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:45,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:45,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:45,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:45,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 233 transitions, 2416 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:45,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:45,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:45,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:46,883 INFO L124 PetriNetUnfolderBase]: 2844/4351 cut-off events. [2024-06-27 19:47:46,883 INFO L125 PetriNetUnfolderBase]: For 397604/397611 co-relation queries the response was YES. [2024-06-27 19:47:46,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35581 conditions, 4351 events. 2844/4351 cut-off events. For 397604/397611 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 22789 event pairs, 666 based on Foata normal form. 8/4356 useless extension candidates. Maximal degree in co-relation 35503. Up to 3219 conditions per place. [2024-06-27 19:47:46,926 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 149 selfloop transitions, 126 changer transitions 0/280 dead transitions. [2024-06-27 19:47:46,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 280 transitions, 3318 flow [2024-06-27 19:47:46,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 19:47:46,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-27 19:47:46,928 INFO L175 Difference]: Start difference. First operand has 174 places, 233 transitions, 2416 flow. Second operand 10 states and 211 transitions. [2024-06-27 19:47:46,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 280 transitions, 3318 flow [2024-06-27 19:47:47,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 280 transitions, 3044 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 19:47:47,589 INFO L231 Difference]: Finished difference. Result has 177 places, 233 transitions, 2402 flow [2024-06-27 19:47:47,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2402, PETRI_PLACES=177, PETRI_TRANSITIONS=233} [2024-06-27 19:47:47,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-27 19:47:47,589 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 233 transitions, 2402 flow [2024-06-27 19:47:47,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:47,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:47,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:47,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:47:47,590 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:47,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:47,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1076859666, now seen corresponding path program 1 times [2024-06-27 19:47:47,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:47,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023051032] [2024-06-27 19:47:47,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:47,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:48,309 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 19:47:48,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:48,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023051032] [2024-06-27 19:47:48,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023051032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:48,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:48,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:47:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140502528] [2024-06-27 19:47:48,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:48,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:47:48,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:47:48,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:47:48,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:47:48,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 233 transitions, 2402 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:47:48,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:48,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:47:48,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:49,140 INFO L124 PetriNetUnfolderBase]: 2518/4001 cut-off events. [2024-06-27 19:47:49,141 INFO L125 PetriNetUnfolderBase]: For 406122/406126 co-relation queries the response was YES. [2024-06-27 19:47:49,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33817 conditions, 4001 events. 2518/4001 cut-off events. For 406122/406126 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 22004 event pairs, 716 based on Foata normal form. 5/3990 useless extension candidates. Maximal degree in co-relation 33738. Up to 3498 conditions per place. [2024-06-27 19:47:49,184 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 191 selfloop transitions, 21 changer transitions 0/259 dead transitions. [2024-06-27 19:47:49,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 259 transitions, 2944 flow [2024-06-27 19:47:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:47:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:47:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 19:47:49,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-27 19:47:49,186 INFO L175 Difference]: Start difference. First operand has 177 places, 233 transitions, 2402 flow. Second operand 7 states and 146 transitions. [2024-06-27 19:47:49,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 259 transitions, 2944 flow [2024-06-27 19:47:49,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 259 transitions, 2684 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:47:49,766 INFO L231 Difference]: Finished difference. Result has 175 places, 236 transitions, 2238 flow [2024-06-27 19:47:49,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2142, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2238, PETRI_PLACES=175, PETRI_TRANSITIONS=236} [2024-06-27 19:47:49,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 130 predicate places. [2024-06-27 19:47:49,766 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 236 transitions, 2238 flow [2024-06-27 19:47:49,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:47:49,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:49,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:49,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:47:49,767 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:49,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash -726041869, now seen corresponding path program 1 times [2024-06-27 19:47:49,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:49,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973545274] [2024-06-27 19:47:49,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:49,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:50,916 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 19:47:50,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:50,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973545274] [2024-06-27 19:47:50,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973545274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:50,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:50,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:47:50,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534032077] [2024-06-27 19:47:50,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:50,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:47:50,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:50,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:47:50,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:47:51,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:47:51,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 236 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:47:51,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:51,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:47:51,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:52,149 INFO L124 PetriNetUnfolderBase]: 2694/4198 cut-off events. [2024-06-27 19:47:52,150 INFO L125 PetriNetUnfolderBase]: For 426266/426275 co-relation queries the response was YES. [2024-06-27 19:47:52,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35114 conditions, 4198 events. 2694/4198 cut-off events. For 426266/426275 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22583 event pairs, 715 based on Foata normal form. 10/4191 useless extension candidates. Maximal degree in co-relation 35034. Up to 3720 conditions per place. [2024-06-27 19:47:52,193 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 210 selfloop transitions, 40 changer transitions 0/275 dead transitions. [2024-06-27 19:47:52,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 275 transitions, 2921 flow [2024-06-27 19:47:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:47:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:47:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-27 19:47:52,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-27 19:47:52,194 INFO L175 Difference]: Start difference. First operand has 175 places, 236 transitions, 2238 flow. Second operand 9 states and 183 transitions. [2024-06-27 19:47:52,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 275 transitions, 2921 flow [2024-06-27 19:47:52,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 275 transitions, 2851 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:47:52,759 INFO L231 Difference]: Finished difference. Result has 180 places, 241 transitions, 2337 flow [2024-06-27 19:47:52,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2337, PETRI_PLACES=180, PETRI_TRANSITIONS=241} [2024-06-27 19:47:52,759 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 135 predicate places. [2024-06-27 19:47:52,760 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 241 transitions, 2337 flow [2024-06-27 19:47:52,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:47:52,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:52,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:52,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:47:52,760 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:52,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:52,761 INFO L85 PathProgramCache]: Analyzing trace with hash 406751838, now seen corresponding path program 7 times [2024-06-27 19:47:52,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:52,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865676040] [2024-06-27 19:47:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:52,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:53,758 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 19:47:53,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:53,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865676040] [2024-06-27 19:47:53,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865676040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:53,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:53,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:53,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306489770] [2024-06-27 19:47:53,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:53,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:53,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:53,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:53,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 241 transitions, 2337 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:53,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:53,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:53,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:55,086 INFO L124 PetriNetUnfolderBase]: 2920/4488 cut-off events. [2024-06-27 19:47:55,086 INFO L125 PetriNetUnfolderBase]: For 448862/448865 co-relation queries the response was YES. [2024-06-27 19:47:55,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37661 conditions, 4488 events. 2920/4488 cut-off events. For 448862/448865 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 23793 event pairs, 699 based on Foata normal form. 4/4489 useless extension candidates. Maximal degree in co-relation 37579. Up to 3299 conditions per place. [2024-06-27 19:47:55,130 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 150 selfloop transitions, 136 changer transitions 0/291 dead transitions. [2024-06-27 19:47:55,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 291 transitions, 3585 flow [2024-06-27 19:47:55,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:55,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 19:47:55,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 19:47:55,132 INFO L175 Difference]: Start difference. First operand has 180 places, 241 transitions, 2337 flow. Second operand 10 states and 209 transitions. [2024-06-27 19:47:55,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 291 transitions, 3585 flow [2024-06-27 19:47:55,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 291 transitions, 3462 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:55,902 INFO L231 Difference]: Finished difference. Result has 184 places, 247 transitions, 2610 flow [2024-06-27 19:47:55,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2610, PETRI_PLACES=184, PETRI_TRANSITIONS=247} [2024-06-27 19:47:55,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 139 predicate places. [2024-06-27 19:47:55,903 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 247 transitions, 2610 flow [2024-06-27 19:47:55,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:55,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:55,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:55,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:47:55,904 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:55,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:55,904 INFO L85 PathProgramCache]: Analyzing trace with hash 465982502, now seen corresponding path program 8 times [2024-06-27 19:47:55,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:55,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506747088] [2024-06-27 19:47:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:55,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:47:56,919 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 19:47:56,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:47:56,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506747088] [2024-06-27 19:47:56,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506747088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:47:56,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:47:56,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:47:56,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947474860] [2024-06-27 19:47:56,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:47:56,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:47:56,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:47:56,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:47:56,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:47:57,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:47:57,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 247 transitions, 2610 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:57,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:47:57,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:47:57,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:47:58,327 INFO L124 PetriNetUnfolderBase]: 2942/4530 cut-off events. [2024-06-27 19:47:58,328 INFO L125 PetriNetUnfolderBase]: For 467355/467358 co-relation queries the response was YES. [2024-06-27 19:47:58,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38536 conditions, 4530 events. 2942/4530 cut-off events. For 467355/467358 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 24165 event pairs, 702 based on Foata normal form. 4/4531 useless extension candidates. Maximal degree in co-relation 38453. Up to 3318 conditions per place. [2024-06-27 19:47:58,371 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 157 selfloop transitions, 134 changer transitions 0/296 dead transitions. [2024-06-27 19:47:58,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 296 transitions, 3836 flow [2024-06-27 19:47:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:47:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:47:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-27 19:47:58,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-27 19:47:58,372 INFO L175 Difference]: Start difference. First operand has 184 places, 247 transitions, 2610 flow. Second operand 10 states and 211 transitions. [2024-06-27 19:47:58,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 296 transitions, 3836 flow [2024-06-27 19:47:59,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 296 transitions, 3614 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 19:47:59,164 INFO L231 Difference]: Finished difference. Result has 188 places, 250 transitions, 2728 flow [2024-06-27 19:47:59,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2728, PETRI_PLACES=188, PETRI_TRANSITIONS=250} [2024-06-27 19:47:59,165 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-27 19:47:59,165 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 250 transitions, 2728 flow [2024-06-27 19:47:59,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:47:59,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:47:59,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:47:59,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:47:59,166 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:47:59,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:47:59,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1420029044, now seen corresponding path program 9 times [2024-06-27 19:47:59,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:47:59,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016527712] [2024-06-27 19:47:59,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:47:59,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:47:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:00,061 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 19:48:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016527712] [2024-06-27 19:48:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016527712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:00,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:00,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:00,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417416917] [2024-06-27 19:48:00,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:00,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:00,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:00,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:00,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 250 transitions, 2728 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:00,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:00,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:00,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:01,347 INFO L124 PetriNetUnfolderBase]: 2964/4562 cut-off events. [2024-06-27 19:48:01,347 INFO L125 PetriNetUnfolderBase]: For 484676/484679 co-relation queries the response was YES. [2024-06-27 19:48:01,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38998 conditions, 4562 events. 2964/4562 cut-off events. For 484676/484679 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 24333 event pairs, 692 based on Foata normal form. 4/4563 useless extension candidates. Maximal degree in co-relation 38914. Up to 3337 conditions per place. [2024-06-27 19:48:01,391 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 160 selfloop transitions, 134 changer transitions 0/299 dead transitions. [2024-06-27 19:48:01,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 299 transitions, 3965 flow [2024-06-27 19:48:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:01,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-27 19:48:01,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-27 19:48:01,392 INFO L175 Difference]: Start difference. First operand has 188 places, 250 transitions, 2728 flow. Second operand 10 states and 213 transitions. [2024-06-27 19:48:01,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 299 transitions, 3965 flow [2024-06-27 19:48:02,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 299 transitions, 3669 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:02,026 INFO L231 Difference]: Finished difference. Result has 191 places, 253 transitions, 2769 flow [2024-06-27 19:48:02,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2439, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2769, PETRI_PLACES=191, PETRI_TRANSITIONS=253} [2024-06-27 19:48:02,027 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-27 19:48:02,027 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 253 transitions, 2769 flow [2024-06-27 19:48:02,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:02,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:02,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:02,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:48:02,028 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:02,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:02,028 INFO L85 PathProgramCache]: Analyzing trace with hash 399400188, now seen corresponding path program 10 times [2024-06-27 19:48:02,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:02,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758409257] [2024-06-27 19:48:02,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:02,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:02,948 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 19:48:02,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:02,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758409257] [2024-06-27 19:48:02,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758409257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:02,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:02,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:02,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534804059] [2024-06-27 19:48:02,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:02,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:02,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:02,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:02,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:03,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:03,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 253 transitions, 2769 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:03,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:03,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:03,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:04,285 INFO L124 PetriNetUnfolderBase]: 2954/4548 cut-off events. [2024-06-27 19:48:04,285 INFO L125 PetriNetUnfolderBase]: For 494834/494837 co-relation queries the response was YES. [2024-06-27 19:48:04,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38905 conditions, 4548 events. 2954/4548 cut-off events. For 494834/494837 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 24266 event pairs, 685 based on Foata normal form. 4/4549 useless extension candidates. Maximal degree in co-relation 38820. Up to 3329 conditions per place. [2024-06-27 19:48:04,334 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 157 selfloop transitions, 135 changer transitions 0/297 dead transitions. [2024-06-27 19:48:04,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 297 transitions, 3727 flow [2024-06-27 19:48:04,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:04,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-27 19:48:04,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:48:04,336 INFO L175 Difference]: Start difference. First operand has 191 places, 253 transitions, 2769 flow. Second operand 10 states and 210 transitions. [2024-06-27 19:48:04,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 297 transitions, 3727 flow [2024-06-27 19:48:05,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 297 transitions, 3358 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:05,248 INFO L231 Difference]: Finished difference. Result has 193 places, 253 transitions, 2678 flow [2024-06-27 19:48:05,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2678, PETRI_PLACES=193, PETRI_TRANSITIONS=253} [2024-06-27 19:48:05,250 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-27 19:48:05,250 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 253 transitions, 2678 flow [2024-06-27 19:48:05,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:05,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:05,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:05,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:48:05,251 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:05,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:05,251 INFO L85 PathProgramCache]: Analyzing trace with hash 608585956, now seen corresponding path program 2 times [2024-06-27 19:48:05,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:05,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492010744] [2024-06-27 19:48:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:05,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:06,141 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 19:48:06,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492010744] [2024-06-27 19:48:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492010744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:06,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:06,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:06,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321489780] [2024-06-27 19:48:06,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:06,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:06,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:06,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:06,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:48:06,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 253 transitions, 2678 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:06,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:06,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:48:06,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:06,962 INFO L124 PetriNetUnfolderBase]: 2593/4163 cut-off events. [2024-06-27 19:48:06,962 INFO L125 PetriNetUnfolderBase]: For 503315/503315 co-relation queries the response was YES. [2024-06-27 19:48:06,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36936 conditions, 4163 events. 2593/4163 cut-off events. For 503315/503315 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23492 event pairs, 700 based on Foata normal form. 1/4141 useless extension candidates. Maximal degree in co-relation 36850. Up to 3609 conditions per place. [2024-06-27 19:48:07,009 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 200 selfloop transitions, 25 changer transitions 0/272 dead transitions. [2024-06-27 19:48:07,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 272 transitions, 3224 flow [2024-06-27 19:48:07,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 19:48:07,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-27 19:48:07,011 INFO L175 Difference]: Start difference. First operand has 193 places, 253 transitions, 2678 flow. Second operand 7 states and 142 transitions. [2024-06-27 19:48:07,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 272 transitions, 3224 flow [2024-06-27 19:48:07,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 272 transitions, 2926 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 19:48:07,826 INFO L231 Difference]: Finished difference. Result has 190 places, 256 transitions, 2488 flow [2024-06-27 19:48:07,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2380, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2488, PETRI_PLACES=190, PETRI_TRANSITIONS=256} [2024-06-27 19:48:07,828 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-27 19:48:07,828 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 256 transitions, 2488 flow [2024-06-27 19:48:07,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:07,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:07,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:48:07,828 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:07,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash -986085199, now seen corresponding path program 1 times [2024-06-27 19:48:07,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:07,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005725846] [2024-06-27 19:48:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:07,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:08,721 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 19:48:08,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:08,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005725846] [2024-06-27 19:48:08,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005725846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:08,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:08,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:08,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205596257] [2024-06-27 19:48:08,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:08,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:08,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:08,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:08,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:08,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:48:08,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 256 transitions, 2488 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 19:48:08,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:08,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:48:08,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:09,541 INFO L124 PetriNetUnfolderBase]: 2418/3950 cut-off events. [2024-06-27 19:48:09,541 INFO L125 PetriNetUnfolderBase]: For 515576/515590 co-relation queries the response was YES. [2024-06-27 19:48:09,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35835 conditions, 3950 events. 2418/3950 cut-off events. For 515576/515590 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 22685 event pairs, 674 based on Foata normal form. 5/3912 useless extension candidates. Maximal degree in co-relation 35748. Up to 3317 conditions per place. [2024-06-27 19:48:09,585 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 192 selfloop transitions, 16 changer transitions 0/276 dead transitions. [2024-06-27 19:48:09,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 276 transitions, 3000 flow [2024-06-27 19:48:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 19:48:09,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-27 19:48:09,587 INFO L175 Difference]: Start difference. First operand has 190 places, 256 transitions, 2488 flow. Second operand 7 states and 146 transitions. [2024-06-27 19:48:09,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 276 transitions, 3000 flow [2024-06-27 19:48:10,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 276 transitions, 2914 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:10,297 INFO L231 Difference]: Finished difference. Result has 192 places, 259 transitions, 2486 flow [2024-06-27 19:48:10,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2402, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2486, PETRI_PLACES=192, PETRI_TRANSITIONS=259} [2024-06-27 19:48:10,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 147 predicate places. [2024-06-27 19:48:10,298 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 259 transitions, 2486 flow [2024-06-27 19:48:10,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 19:48:10,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:10,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:10,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:48:10,299 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:10,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:10,299 INFO L85 PathProgramCache]: Analyzing trace with hash -668883245, now seen corresponding path program 2 times [2024-06-27 19:48:10,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:10,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233249532] [2024-06-27 19:48:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:10,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:10,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:11,403 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 19:48:11,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:11,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233249532] [2024-06-27 19:48:11,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233249532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:11,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:11,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:11,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948471736] [2024-06-27 19:48:11,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:11,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:11,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:11,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:11,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:11,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:48:11,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 259 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:48:11,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:11,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:48:11,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:12,457 INFO L124 PetriNetUnfolderBase]: 2807/4402 cut-off events. [2024-06-27 19:48:12,458 INFO L125 PetriNetUnfolderBase]: For 539446/539463 co-relation queries the response was YES. [2024-06-27 19:48:12,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38813 conditions, 4402 events. 2807/4402 cut-off events. For 539446/539463 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 24238 event pairs, 719 based on Foata normal form. 16/4398 useless extension candidates. Maximal degree in co-relation 38725. Up to 3887 conditions per place. [2024-06-27 19:48:12,506 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 229 selfloop transitions, 42 changer transitions 0/297 dead transitions. [2024-06-27 19:48:12,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 297 transitions, 3222 flow [2024-06-27 19:48:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:48:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:48:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 19:48:12,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:48:12,507 INFO L175 Difference]: Start difference. First operand has 192 places, 259 transitions, 2486 flow. Second operand 9 states and 180 transitions. [2024-06-27 19:48:12,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 297 transitions, 3222 flow [2024-06-27 19:48:13,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 297 transitions, 3160 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:13,423 INFO L231 Difference]: Finished difference. Result has 197 places, 264 transitions, 2606 flow [2024-06-27 19:48:13,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2424, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2606, PETRI_PLACES=197, PETRI_TRANSITIONS=264} [2024-06-27 19:48:13,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-27 19:48:13,424 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 264 transitions, 2606 flow [2024-06-27 19:48:13,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:48:13,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:13,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:13,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:48:13,425 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:13,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1784290494, now seen corresponding path program 11 times [2024-06-27 19:48:13,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:13,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168220437] [2024-06-27 19:48:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:13,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:13,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:14,315 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 19:48:14,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:14,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168220437] [2024-06-27 19:48:14,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168220437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:14,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:14,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:14,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046074316] [2024-06-27 19:48:14,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:14,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:14,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:14,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:14,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:14,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:14,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 264 transitions, 2606 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:14,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:14,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:14,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:15,591 INFO L124 PetriNetUnfolderBase]: 3035/4690 cut-off events. [2024-06-27 19:48:15,592 INFO L125 PetriNetUnfolderBase]: For 566412/566412 co-relation queries the response was YES. [2024-06-27 19:48:15,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41544 conditions, 4690 events. 3035/4690 cut-off events. For 566412/566412 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 25298 event pairs, 725 based on Foata normal form. 4/4679 useless extension candidates. Maximal degree in co-relation 41454. Up to 3416 conditions per place. [2024-06-27 19:48:15,636 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 167 selfloop transitions, 141 changer transitions 0/313 dead transitions. [2024-06-27 19:48:15,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 313 transitions, 3966 flow [2024-06-27 19:48:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 19:48:15,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-27 19:48:15,638 INFO L175 Difference]: Start difference. First operand has 197 places, 264 transitions, 2606 flow. Second operand 10 states and 209 transitions. [2024-06-27 19:48:15,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 313 transitions, 3966 flow [2024-06-27 19:48:16,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 313 transitions, 3831 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:16,477 INFO L231 Difference]: Finished difference. Result has 201 places, 270 transitions, 2883 flow [2024-06-27 19:48:16,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2471, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2883, PETRI_PLACES=201, PETRI_TRANSITIONS=270} [2024-06-27 19:48:16,477 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-27 19:48:16,478 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 270 transitions, 2883 flow [2024-06-27 19:48:16,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:16,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:16,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:16,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:48:16,478 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:16,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:16,479 INFO L85 PathProgramCache]: Analyzing trace with hash 950385482, now seen corresponding path program 12 times [2024-06-27 19:48:16,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:16,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699760810] [2024-06-27 19:48:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:16,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:17,403 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 19:48:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699760810] [2024-06-27 19:48:17,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699760810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:17,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:17,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:17,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424600695] [2024-06-27 19:48:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:17,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:17,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:17,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:17,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:17,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 270 transitions, 2883 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:17,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:17,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:17,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:18,879 INFO L124 PetriNetUnfolderBase]: 3057/4737 cut-off events. [2024-06-27 19:48:18,879 INFO L125 PetriNetUnfolderBase]: For 586451/586451 co-relation queries the response was YES. [2024-06-27 19:48:18,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42434 conditions, 4737 events. 3057/4737 cut-off events. For 586451/586451 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 25699 event pairs, 711 based on Foata normal form. 4/4726 useless extension candidates. Maximal degree in co-relation 42343. Up to 3435 conditions per place. [2024-06-27 19:48:18,924 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 167 selfloop transitions, 145 changer transitions 0/317 dead transitions. [2024-06-27 19:48:18,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 317 transitions, 4210 flow [2024-06-27 19:48:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:18,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 19:48:18,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-27 19:48:18,926 INFO L175 Difference]: Start difference. First operand has 201 places, 270 transitions, 2883 flow. Second operand 10 states and 208 transitions. [2024-06-27 19:48:18,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 317 transitions, 4210 flow [2024-06-27 19:48:19,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 317 transitions, 3869 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:19,471 INFO L231 Difference]: Finished difference. Result has 204 places, 273 transitions, 2907 flow [2024-06-27 19:48:19,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2907, PETRI_PLACES=204, PETRI_TRANSITIONS=273} [2024-06-27 19:48:19,472 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-27 19:48:19,472 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 273 transitions, 2907 flow [2024-06-27 19:48:19,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:19,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:19,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:19,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:48:19,473 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:19,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash -420721867, now seen corresponding path program 3 times [2024-06-27 19:48:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:19,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085920397] [2024-06-27 19:48:19,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:19,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:20,483 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 19:48:20,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:20,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085920397] [2024-06-27 19:48:20,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085920397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:20,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:20,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:20,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520001952] [2024-06-27 19:48:20,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:20,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:20,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:20,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:20,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:20,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:48:20,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 273 transitions, 2907 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:48:20,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:20,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:48:20,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:21,625 INFO L124 PetriNetUnfolderBase]: 2913/4586 cut-off events. [2024-06-27 19:48:21,625 INFO L125 PetriNetUnfolderBase]: For 603089/603104 co-relation queries the response was YES. [2024-06-27 19:48:21,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41798 conditions, 4586 events. 2913/4586 cut-off events. For 603089/603104 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 25552 event pairs, 736 based on Foata normal form. 14/4566 useless extension candidates. Maximal degree in co-relation 41706. Up to 4036 conditions per place. [2024-06-27 19:48:21,676 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 237 selfloop transitions, 47 changer transitions 0/310 dead transitions. [2024-06-27 19:48:21,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 310 transitions, 3678 flow [2024-06-27 19:48:21,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:48:21,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:48:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:48:21,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-27 19:48:21,677 INFO L175 Difference]: Start difference. First operand has 204 places, 273 transitions, 2907 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:48:21,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 310 transitions, 3678 flow [2024-06-27 19:48:22,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 310 transitions, 3208 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 19:48:22,647 INFO L231 Difference]: Finished difference. Result has 205 places, 279 transitions, 2651 flow [2024-06-27 19:48:22,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2651, PETRI_PLACES=205, PETRI_TRANSITIONS=279} [2024-06-27 19:48:22,648 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 160 predicate places. [2024-06-27 19:48:22,648 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 279 transitions, 2651 flow [2024-06-27 19:48:22,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:48:22,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:22,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:22,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:48:22,649 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:22,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:22,650 INFO L85 PathProgramCache]: Analyzing trace with hash -95980747, now seen corresponding path program 4 times [2024-06-27 19:48:22,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:22,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341487136] [2024-06-27 19:48:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:22,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:23,713 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 19:48:23,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:23,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341487136] [2024-06-27 19:48:23,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341487136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:23,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:23,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:23,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470999483] [2024-06-27 19:48:23,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:23,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:23,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:23,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:23,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:23,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:48:23,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 279 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:48:23,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:23,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:48:23,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:24,956 INFO L124 PetriNetUnfolderBase]: 2930/4613 cut-off events. [2024-06-27 19:48:24,956 INFO L125 PetriNetUnfolderBase]: For 621317/621334 co-relation queries the response was YES. [2024-06-27 19:48:24,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42096 conditions, 4613 events. 2930/4613 cut-off events. For 621317/621334 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25758 event pairs, 748 based on Foata normal form. 16/4595 useless extension candidates. Maximal degree in co-relation 42002. Up to 4063 conditions per place. [2024-06-27 19:48:25,008 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 237 selfloop transitions, 51 changer transitions 0/314 dead transitions. [2024-06-27 19:48:25,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 314 transitions, 3416 flow [2024-06-27 19:48:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:48:25,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:48:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:48:25,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 19:48:25,010 INFO L175 Difference]: Start difference. First operand has 205 places, 279 transitions, 2651 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:48:25,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 314 transitions, 3416 flow [2024-06-27 19:48:25,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 314 transitions, 3261 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:48:25,931 INFO L231 Difference]: Finished difference. Result has 208 places, 283 transitions, 2696 flow [2024-06-27 19:48:25,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2696, PETRI_PLACES=208, PETRI_TRANSITIONS=283} [2024-06-27 19:48:25,932 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 163 predicate places. [2024-06-27 19:48:25,932 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 283 transitions, 2696 flow [2024-06-27 19:48:25,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:48:25,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:25,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:25,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:48:25,933 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:25,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:25,934 INFO L85 PathProgramCache]: Analyzing trace with hash -676511942, now seen corresponding path program 13 times [2024-06-27 19:48:25,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:25,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498903585] [2024-06-27 19:48:25,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:25,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:26,989 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 19:48:26,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:26,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498903585] [2024-06-27 19:48:26,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498903585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:26,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:26,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968044074] [2024-06-27 19:48:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:26,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:26,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:27,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:27,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 283 transitions, 2696 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:27,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:27,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:27,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:28,414 INFO L124 PetriNetUnfolderBase]: 3124/4849 cut-off events. [2024-06-27 19:48:28,419 INFO L125 PetriNetUnfolderBase]: For 639654/639654 co-relation queries the response was YES. [2024-06-27 19:48:28,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43835 conditions, 4849 events. 3124/4849 cut-off events. For 639654/639654 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26500 event pairs, 701 based on Foata normal form. 4/4838 useless extension candidates. Maximal degree in co-relation 43740. Up to 3515 conditions per place. [2024-06-27 19:48:28,470 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 169 selfloop transitions, 155 changer transitions 0/329 dead transitions. [2024-06-27 19:48:28,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 329 transitions, 4055 flow [2024-06-27 19:48:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-27 19:48:28,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-27 19:48:28,472 INFO L175 Difference]: Start difference. First operand has 208 places, 283 transitions, 2696 flow. Second operand 10 states and 207 transitions. [2024-06-27 19:48:28,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 329 transitions, 4055 flow [2024-06-27 19:48:29,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 329 transitions, 3916 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:29,444 INFO L231 Difference]: Finished difference. Result has 213 places, 286 transitions, 2924 flow [2024-06-27 19:48:29,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2924, PETRI_PLACES=213, PETRI_TRANSITIONS=286} [2024-06-27 19:48:29,444 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 168 predicate places. [2024-06-27 19:48:29,444 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 286 transitions, 2924 flow [2024-06-27 19:48:29,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:29,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:29,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:29,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:48:29,445 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:29,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:29,445 INFO L85 PathProgramCache]: Analyzing trace with hash -676517522, now seen corresponding path program 14 times [2024-06-27 19:48:29,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:29,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393214370] [2024-06-27 19:48:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:29,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:30,388 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 19:48:30,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:30,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393214370] [2024-06-27 19:48:30,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393214370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:30,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:30,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:30,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535789211] [2024-06-27 19:48:30,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:30,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:30,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:30,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:30,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:30,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:30,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 286 transitions, 2924 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:30,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:30,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:30,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:31,654 INFO L124 PetriNetUnfolderBase]: 3114/4835 cut-off events. [2024-06-27 19:48:31,655 INFO L125 PetriNetUnfolderBase]: For 650966/650966 co-relation queries the response was YES. [2024-06-27 19:48:31,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44191 conditions, 4835 events. 3114/4835 cut-off events. For 650966/650966 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 26383 event pairs, 699 based on Foata normal form. 4/4824 useless extension candidates. Maximal degree in co-relation 44095. Up to 3507 conditions per place. [2024-06-27 19:48:31,708 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 164 selfloop transitions, 158 changer transitions 0/327 dead transitions. [2024-06-27 19:48:31,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 327 transitions, 3984 flow [2024-06-27 19:48:31,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-27 19:48:31,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-27 19:48:31,710 INFO L175 Difference]: Start difference. First operand has 213 places, 286 transitions, 2924 flow. Second operand 10 states and 204 transitions. [2024-06-27 19:48:31,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 327 transitions, 3984 flow [2024-06-27 19:48:32,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 327 transitions, 3546 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:32,680 INFO L231 Difference]: Finished difference. Result has 215 places, 286 transitions, 2810 flow [2024-06-27 19:48:32,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2810, PETRI_PLACES=215, PETRI_TRANSITIONS=286} [2024-06-27 19:48:32,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-27 19:48:32,681 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 286 transitions, 2810 flow [2024-06-27 19:48:32,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:32,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:32,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:32,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:48:32,681 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:32,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:32,682 INFO L85 PathProgramCache]: Analyzing trace with hash 638886075, now seen corresponding path program 5 times [2024-06-27 19:48:32,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:32,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211558807] [2024-06-27 19:48:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:32,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:33,790 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 19:48:33,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:33,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211558807] [2024-06-27 19:48:33,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211558807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:33,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:33,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:48:33,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641302989] [2024-06-27 19:48:33,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:33,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:48:33,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:33,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:48:33,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:48:33,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:48:33,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 286 transitions, 2810 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:48:33,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:33,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:48:33,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:35,011 INFO L124 PetriNetUnfolderBase]: 2934/4624 cut-off events. [2024-06-27 19:48:35,012 INFO L125 PetriNetUnfolderBase]: For 660287/660304 co-relation queries the response was YES. [2024-06-27 19:48:35,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42731 conditions, 4624 events. 2934/4624 cut-off events. For 660287/660304 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25894 event pairs, 696 based on Foata normal form. 16/4613 useless extension candidates. Maximal degree in co-relation 42634. Up to 3974 conditions per place. [2024-06-27 19:48:35,066 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 234 selfloop transitions, 60 changer transitions 0/320 dead transitions. [2024-06-27 19:48:35,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 320 transitions, 3570 flow [2024-06-27 19:48:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:48:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:48:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-27 19:48:35,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-27 19:48:35,068 INFO L175 Difference]: Start difference. First operand has 215 places, 286 transitions, 2810 flow. Second operand 9 states and 179 transitions. [2024-06-27 19:48:35,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 320 transitions, 3570 flow [2024-06-27 19:48:35,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 320 transitions, 3260 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:48:35,878 INFO L231 Difference]: Finished difference. Result has 216 places, 288 transitions, 2699 flow [2024-06-27 19:48:35,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2500, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2699, PETRI_PLACES=216, PETRI_TRANSITIONS=288} [2024-06-27 19:48:35,879 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-27 19:48:35,879 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 288 transitions, 2699 flow [2024-06-27 19:48:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 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 19:48:35,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:35,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:35,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:48:35,880 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:35,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:35,880 INFO L85 PathProgramCache]: Analyzing trace with hash -420998914, now seen corresponding path program 15 times [2024-06-27 19:48:35,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399685255] [2024-06-27 19:48:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:35,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:36,937 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 19:48:36,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:36,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399685255] [2024-06-27 19:48:36,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399685255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:36,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:36,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:48:36,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78815323] [2024-06-27 19:48:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:36,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:48:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:48:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:48:37,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:48:37,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 288 transitions, 2699 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:37,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:37,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:48:37,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:38,360 INFO L124 PetriNetUnfolderBase]: 3096/4809 cut-off events. [2024-06-27 19:48:38,360 INFO L125 PetriNetUnfolderBase]: For 670200/670200 co-relation queries the response was YES. [2024-06-27 19:48:38,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43549 conditions, 4809 events. 3096/4809 cut-off events. For 670200/670200 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 26231 event pairs, 724 based on Foata normal form. 4/4798 useless extension candidates. Maximal degree in co-relation 43451. Up to 3487 conditions per place. [2024-06-27 19:48:38,414 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 153 selfloop transitions, 166 changer transitions 0/324 dead transitions. [2024-06-27 19:48:38,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 324 transitions, 3477 flow [2024-06-27 19:48:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:48:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:48:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-27 19:48:38,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:48:38,415 INFO L175 Difference]: Start difference. First operand has 216 places, 288 transitions, 2699 flow. Second operand 10 states and 200 transitions. [2024-06-27 19:48:38,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 324 transitions, 3477 flow [2024-06-27 19:48:39,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 324 transitions, 3266 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 19:48:39,402 INFO L231 Difference]: Finished difference. Result has 219 places, 288 transitions, 2828 flow [2024-06-27 19:48:39,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2488, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2828, PETRI_PLACES=219, PETRI_TRANSITIONS=288} [2024-06-27 19:48:39,402 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-27 19:48:39,402 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 288 transitions, 2828 flow [2024-06-27 19:48:39,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:48:39,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:39,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:39,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:48:39,403 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:39,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:39,403 INFO L85 PathProgramCache]: Analyzing trace with hash 621531091, now seen corresponding path program 2 times [2024-06-27 19:48:39,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:39,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236512824] [2024-06-27 19:48:39,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:39,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:39,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:40,433 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 19:48:40,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:40,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236512824] [2024-06-27 19:48:40,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236512824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:40,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:40,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:40,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082701036] [2024-06-27 19:48:40,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:40,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:40,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:40,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:40,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:40,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:48:40,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 288 transitions, 2828 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 19:48:40,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:40,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:48:40,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:41,261 INFO L124 PetriNetUnfolderBase]: 2522/4120 cut-off events. [2024-06-27 19:48:41,262 INFO L125 PetriNetUnfolderBase]: For 680271/680313 co-relation queries the response was YES. [2024-06-27 19:48:41,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40383 conditions, 4120 events. 2522/4120 cut-off events. For 680271/680313 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23799 event pairs, 670 based on Foata normal form. 13/4056 useless extension candidates. Maximal degree in co-relation 40284. Up to 3474 conditions per place. [2024-06-27 19:48:41,312 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 214 selfloop transitions, 21 changer transitions 0/303 dead transitions. [2024-06-27 19:48:41,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 303 transitions, 3392 flow [2024-06-27 19:48:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:41,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 19:48:41,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-27 19:48:41,314 INFO L175 Difference]: Start difference. First operand has 219 places, 288 transitions, 2828 flow. Second operand 7 states and 142 transitions. [2024-06-27 19:48:41,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 303 transitions, 3392 flow [2024-06-27 19:48:42,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 303 transitions, 2952 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-27 19:48:42,217 INFO L231 Difference]: Finished difference. Result has 214 places, 291 transitions, 2496 flow [2024-06-27 19:48:42,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2496, PETRI_PLACES=214, PETRI_TRANSITIONS=291} [2024-06-27 19:48:42,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-27 19:48:42,217 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 291 transitions, 2496 flow [2024-06-27 19:48:42,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 19:48:42,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:42,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:42,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:48:42,218 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:42,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:42,218 INFO L85 PathProgramCache]: Analyzing trace with hash -633643056, now seen corresponding path program 3 times [2024-06-27 19:48:42,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:42,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747559126] [2024-06-27 19:48:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:42,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:43,142 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 19:48:43,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:43,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747559126] [2024-06-27 19:48:43,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747559126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:43,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:43,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:43,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408955774] [2024-06-27 19:48:43,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:43,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:43,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:43,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:43,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:43,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:48:43,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 291 transitions, 2496 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:43,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:43,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:48:43,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:43,933 INFO L124 PetriNetUnfolderBase]: 2694/4358 cut-off events. [2024-06-27 19:48:43,933 INFO L125 PetriNetUnfolderBase]: For 692478/692487 co-relation queries the response was YES. [2024-06-27 19:48:43,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41400 conditions, 4358 events. 2694/4358 cut-off events. For 692478/692487 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 25035 event pairs, 695 based on Foata normal form. 7/4319 useless extension candidates. Maximal degree in co-relation 41300. Up to 3766 conditions per place. [2024-06-27 19:48:43,986 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 226 selfloop transitions, 32 changer transitions 0/305 dead transitions. [2024-06-27 19:48:43,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 305 transitions, 3102 flow [2024-06-27 19:48:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:43,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:43,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:48:43,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 19:48:43,987 INFO L175 Difference]: Start difference. First operand has 214 places, 291 transitions, 2496 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:48:43,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 305 transitions, 3102 flow [2024-06-27 19:48:44,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 305 transitions, 3016 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:44,950 INFO L231 Difference]: Finished difference. Result has 216 places, 294 transitions, 2542 flow [2024-06-27 19:48:44,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2542, PETRI_PLACES=216, PETRI_TRANSITIONS=294} [2024-06-27 19:48:44,950 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-27 19:48:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 294 transitions, 2542 flow [2024-06-27 19:48:44,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:44,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:44,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:44,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:48:44,951 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:44,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:44,952 INFO L85 PathProgramCache]: Analyzing trace with hash -633137601, now seen corresponding path program 3 times [2024-06-27 19:48:44,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:44,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115909621] [2024-06-27 19:48:44,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:44,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:46,074 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 19:48:46,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:46,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115909621] [2024-06-27 19:48:46,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115909621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:46,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:46,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060111681] [2024-06-27 19:48:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:46,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:46,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:48:46,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 294 transitions, 2542 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 19:48:46,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:46,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:48:46,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:46,969 INFO L124 PetriNetUnfolderBase]: 2516/4122 cut-off events. [2024-06-27 19:48:46,969 INFO L125 PetriNetUnfolderBase]: For 707750/707787 co-relation queries the response was YES. [2024-06-27 19:48:46,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40562 conditions, 4122 events. 2516/4122 cut-off events. For 707750/707787 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 23955 event pairs, 670 based on Foata normal form. 13/4067 useless extension candidates. Maximal degree in co-relation 40461. Up to 3458 conditions per place. [2024-06-27 19:48:47,018 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 214 selfloop transitions, 29 changer transitions 0/312 dead transitions. [2024-06-27 19:48:47,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 312 transitions, 3144 flow [2024-06-27 19:48:47,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:47,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-27 19:48:47,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 19:48:47,020 INFO L175 Difference]: Start difference. First operand has 216 places, 294 transitions, 2542 flow. Second operand 7 states and 143 transitions. [2024-06-27 19:48:47,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 312 transitions, 3144 flow [2024-06-27 19:48:47,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 312 transitions, 3034 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:47,885 INFO L231 Difference]: Finished difference. Result has 219 places, 300 transitions, 2594 flow [2024-06-27 19:48:47,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2432, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2594, PETRI_PLACES=219, PETRI_TRANSITIONS=300} [2024-06-27 19:48:47,885 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-27 19:48:47,885 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 300 transitions, 2594 flow [2024-06-27 19:48:47,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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 19:48:47,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:47,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:47,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:48:47,886 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:47,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:47,886 INFO L85 PathProgramCache]: Analyzing trace with hash -840199962, now seen corresponding path program 1 times [2024-06-27 19:48:47,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:47,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422666214] [2024-06-27 19:48:47,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:47,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:48,622 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 19:48:48,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:48,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422666214] [2024-06-27 19:48:48,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422666214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:48,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:48,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:48,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639561846] [2024-06-27 19:48:48,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:48,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:48,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:48,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:48,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:48:48,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 300 transitions, 2594 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:48,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:48,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:48:48,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:49,542 INFO L124 PetriNetUnfolderBase]: 2766/4455 cut-off events. [2024-06-27 19:48:49,543 INFO L125 PetriNetUnfolderBase]: For 733597/733603 co-relation queries the response was YES. [2024-06-27 19:48:49,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42783 conditions, 4455 events. 2766/4455 cut-off events. For 733597/733603 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25497 event pairs, 686 based on Foata normal form. 4/4434 useless extension candidates. Maximal degree in co-relation 42680. Up to 3921 conditions per place. [2024-06-27 19:48:49,680 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 274 selfloop transitions, 14 changer transitions 0/320 dead transitions. [2024-06-27 19:48:49,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 320 transitions, 3278 flow [2024-06-27 19:48:49,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:49,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:49,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 19:48:49,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-27 19:48:49,682 INFO L175 Difference]: Start difference. First operand has 219 places, 300 transitions, 2594 flow. Second operand 7 states and 141 transitions. [2024-06-27 19:48:49,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 320 transitions, 3278 flow [2024-06-27 19:48:50,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 320 transitions, 3201 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:48:50,919 INFO L231 Difference]: Finished difference. Result has 223 places, 303 transitions, 2607 flow [2024-06-27 19:48:50,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2607, PETRI_PLACES=223, PETRI_TRANSITIONS=303} [2024-06-27 19:48:50,919 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-27 19:48:50,919 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 303 transitions, 2607 flow [2024-06-27 19:48:50,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:50,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:50,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:50,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:48:50,920 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:50,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:50,921 INFO L85 PathProgramCache]: Analyzing trace with hash -840050232, now seen corresponding path program 2 times [2024-06-27 19:48:50,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:50,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325868003] [2024-06-27 19:48:50,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:50,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:51,822 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 19:48:51,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:51,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325868003] [2024-06-27 19:48:51,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325868003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:51,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:51,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:51,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140746730] [2024-06-27 19:48:51,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:51,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:51,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:51,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:51,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:51,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:48:51,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 303 transitions, 2607 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:51,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:51,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:48:51,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:52,845 INFO L124 PetriNetUnfolderBase]: 2776/4471 cut-off events. [2024-06-27 19:48:52,846 INFO L125 PetriNetUnfolderBase]: For 751317/751323 co-relation queries the response was YES. [2024-06-27 19:48:52,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43487 conditions, 4471 events. 2776/4471 cut-off events. For 751317/751323 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25631 event pairs, 686 based on Foata normal form. 4/4450 useless extension candidates. Maximal degree in co-relation 43382. Up to 3926 conditions per place. [2024-06-27 19:48:52,917 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 270 selfloop transitions, 19 changer transitions 0/321 dead transitions. [2024-06-27 19:48:52,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 321 transitions, 3299 flow [2024-06-27 19:48:52,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:52,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 19:48:52,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-27 19:48:52,918 INFO L175 Difference]: Start difference. First operand has 223 places, 303 transitions, 2607 flow. Second operand 7 states and 141 transitions. [2024-06-27 19:48:52,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 321 transitions, 3299 flow [2024-06-27 19:48:54,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 321 transitions, 3231 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:54,014 INFO L231 Difference]: Finished difference. Result has 225 places, 306 transitions, 2645 flow [2024-06-27 19:48:54,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2539, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2645, PETRI_PLACES=225, PETRI_TRANSITIONS=306} [2024-06-27 19:48:54,015 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-27 19:48:54,015 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 306 transitions, 2645 flow [2024-06-27 19:48:54,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:54,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:54,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:54,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:48:54,016 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:54,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:54,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1151694655, now seen corresponding path program 1 times [2024-06-27 19:48:54,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:54,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390001168] [2024-06-27 19:48:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:54,956 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 19:48:54,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:54,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390001168] [2024-06-27 19:48:54,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390001168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:54,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:54,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749718649] [2024-06-27 19:48:54,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:54,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:55,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:48:55,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 306 transitions, 2645 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:55,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:55,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:48:55,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:55,898 INFO L124 PetriNetUnfolderBase]: 2791/4492 cut-off events. [2024-06-27 19:48:55,899 INFO L125 PetriNetUnfolderBase]: For 772933/772939 co-relation queries the response was YES. [2024-06-27 19:48:55,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44172 conditions, 4492 events. 2791/4492 cut-off events. For 772933/772939 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25731 event pairs, 686 based on Foata normal form. 5/4472 useless extension candidates. Maximal degree in co-relation 44066. Up to 3960 conditions per place. [2024-06-27 19:48:55,960 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 277 selfloop transitions, 14 changer transitions 0/323 dead transitions. [2024-06-27 19:48:55,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 323 transitions, 3311 flow [2024-06-27 19:48:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:55,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:48:55,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 19:48:55,961 INFO L175 Difference]: Start difference. First operand has 225 places, 306 transitions, 2645 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:48:55,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 323 transitions, 3311 flow [2024-06-27 19:48:57,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 323 transitions, 3227 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:48:57,172 INFO L231 Difference]: Finished difference. Result has 227 places, 309 transitions, 2645 flow [2024-06-27 19:48:57,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2561, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2645, PETRI_PLACES=227, PETRI_TRANSITIONS=309} [2024-06-27 19:48:57,173 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-27 19:48:57,173 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 309 transitions, 2645 flow [2024-06-27 19:48:57,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:57,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:48:57,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:48:57,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:48:57,174 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:48:57,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:48:57,174 INFO L85 PathProgramCache]: Analyzing trace with hash -633129665, now seen corresponding path program 2 times [2024-06-27 19:48:57,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:48:57,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431716696] [2024-06-27 19:48:57,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:48:57,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:48:57,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:48:58,789 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 19:48:58,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:48:58,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431716696] [2024-06-27 19:48:58,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431716696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:48:58,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:48:58,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:48:58,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565309231] [2024-06-27 19:48:58,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:48:58,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:48:58,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:48:58,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:48:58,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:48:58,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:48:58,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 309 transitions, 2645 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:48:58,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:48:58,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:48:58,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:48:59,699 INFO L124 PetriNetUnfolderBase]: 2796/4502 cut-off events. [2024-06-27 19:48:59,700 INFO L125 PetriNetUnfolderBase]: For 787099/787108 co-relation queries the response was YES. [2024-06-27 19:48:59,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44736 conditions, 4502 events. 2796/4502 cut-off events. For 787099/787108 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25811 event pairs, 688 based on Foata normal form. 6/4482 useless extension candidates. Maximal degree in co-relation 44629. Up to 3950 conditions per place. [2024-06-27 19:48:59,753 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 271 selfloop transitions, 27 changer transitions 0/330 dead transitions. [2024-06-27 19:48:59,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 330 transitions, 3573 flow [2024-06-27 19:48:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:48:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:48:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:48:59,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 19:48:59,755 INFO L175 Difference]: Start difference. First operand has 227 places, 309 transitions, 2645 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:48:59,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 330 transitions, 3573 flow [2024-06-27 19:49:00,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 330 transitions, 3473 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 19:49:00,798 INFO L231 Difference]: Finished difference. Result has 230 places, 319 transitions, 2782 flow [2024-06-27 19:49:00,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2583, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2782, PETRI_PLACES=230, PETRI_TRANSITIONS=319} [2024-06-27 19:49:00,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-27 19:49:00,799 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 319 transitions, 2782 flow [2024-06-27 19:49:00,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:49:00,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:00,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:00,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:49:00,800 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:00,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:00,801 INFO L85 PathProgramCache]: Analyzing trace with hash -636964668, now seen corresponding path program 3 times [2024-06-27 19:49:00,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:00,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644449103] [2024-06-27 19:49:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:00,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:01,689 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 19:49:01,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644449103] [2024-06-27 19:49:01,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644449103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:01,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:01,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:49:01,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268203032] [2024-06-27 19:49:01,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:01,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:49:01,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:01,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:49:01,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:49:01,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:49:01,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 319 transitions, 2782 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:49:01,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:01,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:49:01,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:02,582 INFO L124 PetriNetUnfolderBase]: 2798/4507 cut-off events. [2024-06-27 19:49:02,583 INFO L125 PetriNetUnfolderBase]: For 805227/805236 co-relation queries the response was YES. [2024-06-27 19:49:02,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45284 conditions, 4507 events. 2798/4507 cut-off events. For 805227/805236 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 25869 event pairs, 692 based on Foata normal form. 4/4485 useless extension candidates. Maximal degree in co-relation 45175. Up to 3943 conditions per place. [2024-06-27 19:49:02,639 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 276 selfloop transitions, 26 changer transitions 0/334 dead transitions. [2024-06-27 19:49:02,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 334 transitions, 3500 flow [2024-06-27 19:49:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:49:02,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:49:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 19:49:02,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:49:02,648 INFO L175 Difference]: Start difference. First operand has 230 places, 319 transitions, 2782 flow. Second operand 7 states and 140 transitions. [2024-06-27 19:49:02,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 334 transitions, 3500 flow [2024-06-27 19:49:03,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 334 transitions, 3434 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 19:49:03,829 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 2846 flow [2024-06-27 19:49:03,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2846, PETRI_PLACES=234, PETRI_TRANSITIONS=322} [2024-06-27 19:49:03,830 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 189 predicate places. [2024-06-27 19:49:03,830 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 2846 flow [2024-06-27 19:49:03,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:49:03,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:03,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:49:03,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:49:03,830 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:03,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:03,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1146130465, now seen corresponding path program 3 times [2024-06-27 19:49:03,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:03,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775542556] [2024-06-27 19:49:03,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:03,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:04,864 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 19:49:04,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:04,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775542556] [2024-06-27 19:49:04,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775542556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:04,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:04,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:49:04,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20332442] [2024-06-27 19:49:04,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:04,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:49:04,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:04,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:49:04,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:49:04,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:49:04,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 322 transitions, 2846 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:49:04,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:04,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:49:04,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:05,816 INFO L124 PetriNetUnfolderBase]: 2797/4506 cut-off events. [2024-06-27 19:49:05,817 INFO L125 PetriNetUnfolderBase]: For 820747/820756 co-relation queries the response was YES. [2024-06-27 19:49:05,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45689 conditions, 4506 events. 2797/4506 cut-off events. For 820747/820756 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 25934 event pairs, 687 based on Foata normal form. 7/4487 useless extension candidates. Maximal degree in co-relation 45578. Up to 3964 conditions per place. [2024-06-27 19:49:05,873 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 283 selfloop transitions, 21 changer transitions 0/336 dead transitions. [2024-06-27 19:49:05,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 336 transitions, 3543 flow [2024-06-27 19:49:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:49:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:49:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 19:49:05,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-27 19:49:05,874 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 2846 flow. Second operand 7 states and 137 transitions. [2024-06-27 19:49:05,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 336 transitions, 3543 flow [2024-06-27 19:49:07,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 336 transitions, 3409 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 19:49:07,191 INFO L231 Difference]: Finished difference. Result has 236 places, 325 transitions, 2824 flow [2024-06-27 19:49:07,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2824, PETRI_PLACES=236, PETRI_TRANSITIONS=325} [2024-06-27 19:49:07,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 191 predicate places. [2024-06-27 19:49:07,191 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 325 transitions, 2824 flow [2024-06-27 19:49:07,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 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 19:49:07,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:07,192 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 19:49:07,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:49:07,192 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:07,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:07,192 INFO L85 PathProgramCache]: Analyzing trace with hash 493054189, now seen corresponding path program 1 times [2024-06-27 19:49:07,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:07,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670444560] [2024-06-27 19:49:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:08,188 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 19:49:08,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:08,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670444560] [2024-06-27 19:49:08,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670444560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:08,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:08,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:08,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724760679] [2024-06-27 19:49:08,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:08,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:08,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:08,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:08,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:08,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:08,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 325 transitions, 2824 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:08,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:08,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:08,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:09,596 INFO L124 PetriNetUnfolderBase]: 3183/4941 cut-off events. [2024-06-27 19:49:09,597 INFO L125 PetriNetUnfolderBase]: For 852817/852821 co-relation queries the response was YES. [2024-06-27 19:49:09,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49371 conditions, 4941 events. 3183/4941 cut-off events. For 852817/852821 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 27111 event pairs, 565 based on Foata normal form. 8/4947 useless extension candidates. Maximal degree in co-relation 49259. Up to 4508 conditions per place. [2024-06-27 19:49:09,660 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 343 selfloop transitions, 33 changer transitions 0/381 dead transitions. [2024-06-27 19:49:09,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 381 transitions, 4164 flow [2024-06-27 19:49:09,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:49:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:49:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-27 19:49:09,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44421487603305787 [2024-06-27 19:49:09,662 INFO L175 Difference]: Start difference. First operand has 236 places, 325 transitions, 2824 flow. Second operand 11 states and 215 transitions. [2024-06-27 19:49:09,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 381 transitions, 4164 flow [2024-06-27 19:49:10,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 381 transitions, 4076 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:49:10,995 INFO L231 Difference]: Finished difference. Result has 242 places, 329 transitions, 2957 flow [2024-06-27 19:49:10,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2957, PETRI_PLACES=242, PETRI_TRANSITIONS=329} [2024-06-27 19:49:10,996 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-27 19:49:10,996 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 329 transitions, 2957 flow [2024-06-27 19:49:10,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:10,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:10,996 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 19:49:10,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:49:10,996 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:10,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:10,997 INFO L85 PathProgramCache]: Analyzing trace with hash 956337233, now seen corresponding path program 2 times [2024-06-27 19:49:10,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:10,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830823937] [2024-06-27 19:49:10,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:10,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:11,993 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 19:49:11,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:11,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830823937] [2024-06-27 19:49:11,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830823937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:11,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:11,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:11,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547979835] [2024-06-27 19:49:11,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:11,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:11,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:11,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:11,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:12,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:12,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 329 transitions, 2957 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:12,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:12,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:12,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:13,377 INFO L124 PetriNetUnfolderBase]: 3175/4929 cut-off events. [2024-06-27 19:49:13,378 INFO L125 PetriNetUnfolderBase]: For 865297/865301 co-relation queries the response was YES. [2024-06-27 19:49:13,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49502 conditions, 4929 events. 3175/4929 cut-off events. For 865297/865301 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 27072 event pairs, 704 based on Foata normal form. 8/4935 useless extension candidates. Maximal degree in co-relation 49389. Up to 4555 conditions per place. [2024-06-27 19:49:13,440 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 340 selfloop transitions, 29 changer transitions 0/374 dead transitions. [2024-06-27 19:49:13,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 374 transitions, 3841 flow [2024-06-27 19:49:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:13,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 19:49:13,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 19:49:13,441 INFO L175 Difference]: Start difference. First operand has 242 places, 329 transitions, 2957 flow. Second operand 10 states and 195 transitions. [2024-06-27 19:49:13,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 374 transitions, 3841 flow [2024-06-27 19:49:14,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 374 transitions, 3671 flow, removed 67 selfloop flow, removed 7 redundant places. [2024-06-27 19:49:14,774 INFO L231 Difference]: Finished difference. Result has 245 places, 329 transitions, 2852 flow [2024-06-27 19:49:14,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2852, PETRI_PLACES=245, PETRI_TRANSITIONS=329} [2024-06-27 19:49:14,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-27 19:49:14,775 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 329 transitions, 2852 flow [2024-06-27 19:49:14,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:14,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:14,775 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 19:49:14,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:49:14,775 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:14,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1071628403, now seen corresponding path program 3 times [2024-06-27 19:49:14,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:14,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371499073] [2024-06-27 19:49:14,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:14,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:15,774 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 19:49:15,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:15,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371499073] [2024-06-27 19:49:15,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371499073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:15,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:15,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:15,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142676876] [2024-06-27 19:49:15,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:15,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:15,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:15,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:15,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:15,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:15,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 329 transitions, 2852 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:15,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:15,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:15,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:17,273 INFO L124 PetriNetUnfolderBase]: 3192/4958 cut-off events. [2024-06-27 19:49:17,273 INFO L125 PetriNetUnfolderBase]: For 889333/889340 co-relation queries the response was YES. [2024-06-27 19:49:17,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49754 conditions, 4958 events. 3192/4958 cut-off events. For 889333/889340 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 27289 event pairs, 714 based on Foata normal form. 10/4965 useless extension candidates. Maximal degree in co-relation 49639. Up to 4385 conditions per place. [2024-06-27 19:49:17,337 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 280 selfloop transitions, 87 changer transitions 0/372 dead transitions. [2024-06-27 19:49:17,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 372 transitions, 3792 flow [2024-06-27 19:49:17,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:49:17,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 19:49:17,345 INFO L175 Difference]: Start difference. First operand has 245 places, 329 transitions, 2852 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:49:17,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 372 transitions, 3792 flow [2024-06-27 19:49:18,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 372 transitions, 3729 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:49:18,348 INFO L231 Difference]: Finished difference. Result has 246 places, 331 transitions, 3050 flow [2024-06-27 19:49:18,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3050, PETRI_PLACES=246, PETRI_TRANSITIONS=331} [2024-06-27 19:49:18,350 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-27 19:49:18,350 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 331 transitions, 3050 flow [2024-06-27 19:49:18,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:18,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:18,351 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 19:49:18,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:49:18,351 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:18,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:18,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1374791459, now seen corresponding path program 1 times [2024-06-27 19:49:18,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:18,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360119039] [2024-06-27 19:49:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:18,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:18,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:19,126 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 19:49:19,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:19,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360119039] [2024-06-27 19:49:19,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360119039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:19,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:19,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:49:19,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694420081] [2024-06-27 19:49:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:19,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:49:19,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:49:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:49:19,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:49:19,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 331 transitions, 3050 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:49:19,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:19,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:49:19,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:20,127 INFO L124 PetriNetUnfolderBase]: 2809/4528 cut-off events. [2024-06-27 19:49:20,127 INFO L125 PetriNetUnfolderBase]: For 901306/901316 co-relation queries the response was YES. [2024-06-27 19:49:20,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47930 conditions, 4528 events. 2809/4528 cut-off events. For 901306/901316 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 26121 event pairs, 657 based on Foata normal form. 6/4496 useless extension candidates. Maximal degree in co-relation 47814. Up to 3861 conditions per place. [2024-06-27 19:49:20,184 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 283 selfloop transitions, 26 changer transitions 0/364 dead transitions. [2024-06-27 19:49:20,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 364 transitions, 3836 flow [2024-06-27 19:49:20,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:49:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:49:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 19:49:20,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:49:20,186 INFO L175 Difference]: Start difference. First operand has 246 places, 331 transitions, 3050 flow. Second operand 8 states and 168 transitions. [2024-06-27 19:49:20,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 364 transitions, 3836 flow [2024-06-27 19:49:21,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 364 transitions, 3593 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-27 19:49:21,611 INFO L231 Difference]: Finished difference. Result has 246 places, 334 transitions, 2940 flow [2024-06-27 19:49:21,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2940, PETRI_PLACES=246, PETRI_TRANSITIONS=334} [2024-06-27 19:49:21,612 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-27 19:49:21,612 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 334 transitions, 2940 flow [2024-06-27 19:49:21,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:49:21,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:21,612 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 19:49:21,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:49:21,613 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:21,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:21,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1237267537, now seen corresponding path program 4 times [2024-06-27 19:49:21,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:21,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436532998] [2024-06-27 19:49:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:21,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:22,659 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 19:49:22,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:22,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436532998] [2024-06-27 19:49:22,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436532998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:22,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:22,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:22,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249443927] [2024-06-27 19:49:22,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:22,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:22,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:22,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:22,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:22,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:22,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 334 transitions, 2940 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:22,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:22,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:22,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:24,131 INFO L124 PetriNetUnfolderBase]: 3219/5000 cut-off events. [2024-06-27 19:49:24,132 INFO L125 PetriNetUnfolderBase]: For 933725/933732 co-relation queries the response was YES. [2024-06-27 19:49:24,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51017 conditions, 5000 events. 3219/5000 cut-off events. For 933725/933732 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 27561 event pairs, 709 based on Foata normal form. 10/5007 useless extension candidates. Maximal degree in co-relation 50900. Up to 4426 conditions per place. [2024-06-27 19:49:24,198 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 291 selfloop transitions, 80 changer transitions 0/376 dead transitions. [2024-06-27 19:49:24,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 376 transitions, 3892 flow [2024-06-27 19:49:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:49:24,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 19:49:24,200 INFO L175 Difference]: Start difference. First operand has 246 places, 334 transitions, 2940 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:49:24,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 376 transitions, 3892 flow [2024-06-27 19:49:25,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 376 transitions, 3783 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:49:25,298 INFO L231 Difference]: Finished difference. Result has 250 places, 336 transitions, 3082 flow [2024-06-27 19:49:25,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2831, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3082, PETRI_PLACES=250, PETRI_TRANSITIONS=336} [2024-06-27 19:49:25,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-27 19:49:25,299 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 336 transitions, 3082 flow [2024-06-27 19:49:25,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:25,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:25,300 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 19:49:25,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:49:25,300 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:25,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:25,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1243947665, now seen corresponding path program 1 times [2024-06-27 19:49:25,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:25,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252896222] [2024-06-27 19:49:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:25,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:26,407 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 19:49:26,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:26,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252896222] [2024-06-27 19:49:26,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252896222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:26,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:26,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:26,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024025348] [2024-06-27 19:49:26,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:26,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:26,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:26,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:26,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:26,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:26,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 336 transitions, 3082 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:26,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:26,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:26,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:27,875 INFO L124 PetriNetUnfolderBase]: 3236/5027 cut-off events. [2024-06-27 19:49:27,875 INFO L125 PetriNetUnfolderBase]: For 961375/961382 co-relation queries the response was YES. [2024-06-27 19:49:27,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51788 conditions, 5027 events. 3236/5027 cut-off events. For 961375/961382 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 27744 event pairs, 660 based on Foata normal form. 8/5032 useless extension candidates. Maximal degree in co-relation 51670. Up to 4359 conditions per place. [2024-06-27 19:49:27,941 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 283 selfloop transitions, 93 changer transitions 0/381 dead transitions. [2024-06-27 19:49:27,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 381 transitions, 4062 flow [2024-06-27 19:49:27,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:49:27,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 19:49:27,943 INFO L175 Difference]: Start difference. First operand has 250 places, 336 transitions, 3082 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:49:27,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 381 transitions, 4062 flow [2024-06-27 19:49:29,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 381 transitions, 3829 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-27 19:49:29,742 INFO L231 Difference]: Finished difference. Result has 253 places, 341 transitions, 3146 flow [2024-06-27 19:49:29,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3146, PETRI_PLACES=253, PETRI_TRANSITIONS=341} [2024-06-27 19:49:29,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-27 19:49:29,743 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 341 transitions, 3146 flow [2024-06-27 19:49:29,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:29,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:29,744 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 19:49:29,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:49:29,744 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:29,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:29,744 INFO L85 PathProgramCache]: Analyzing trace with hash 977090177, now seen corresponding path program 2 times [2024-06-27 19:49:29,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:29,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188578739] [2024-06-27 19:49:29,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:29,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:30,551 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 19:49:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:30,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188578739] [2024-06-27 19:49:30,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188578739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:30,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:30,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:49:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653363622] [2024-06-27 19:49:30,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:30,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:49:30,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:30,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:49:30,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:49:30,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:49:30,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 341 transitions, 3146 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:49:30,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:30,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:49:30,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:31,621 INFO L124 PetriNetUnfolderBase]: 2843/4583 cut-off events. [2024-06-27 19:49:31,621 INFO L125 PetriNetUnfolderBase]: For 966504/966516 co-relation queries the response was YES. [2024-06-27 19:49:31,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49817 conditions, 4583 events. 2843/4583 cut-off events. For 966504/966516 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 26441 event pairs, 632 based on Foata normal form. 5/4543 useless extension candidates. Maximal degree in co-relation 49697. Up to 3902 conditions per place. [2024-06-27 19:49:31,681 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 29 changer transitions 0/369 dead transitions. [2024-06-27 19:49:31,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 369 transitions, 3930 flow [2024-06-27 19:49:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:49:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:49:31,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 19:49:31,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 19:49:31,682 INFO L175 Difference]: Start difference. First operand has 253 places, 341 transitions, 3146 flow. Second operand 8 states and 164 transitions. [2024-06-27 19:49:31,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 369 transitions, 3930 flow [2024-06-27 19:49:32,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 369 transitions, 3677 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 19:49:32,970 INFO L231 Difference]: Finished difference. Result has 254 places, 344 transitions, 3037 flow [2024-06-27 19:49:32,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3037, PETRI_PLACES=254, PETRI_TRANSITIONS=344} [2024-06-27 19:49:32,971 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-27 19:49:32,971 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 344 transitions, 3037 flow [2024-06-27 19:49:32,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:49:32,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:32,971 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 19:49:32,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:49:32,971 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:32,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:32,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1264199827, now seen corresponding path program 1 times [2024-06-27 19:49:32,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:32,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883526788] [2024-06-27 19:49:32,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:32,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:33,892 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 19:49:33,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:33,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883526788] [2024-06-27 19:49:33,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883526788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:33,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:33,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:49:33,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462971218] [2024-06-27 19:49:33,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:33,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:49:33,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:33,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:49:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:49:33,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:49:33,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 344 transitions, 3037 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:49:33,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:33,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:49:33,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:35,015 INFO L124 PetriNetUnfolderBase]: 2848/4595 cut-off events. [2024-06-27 19:49:35,015 INFO L125 PetriNetUnfolderBase]: For 989142/989156 co-relation queries the response was YES. [2024-06-27 19:49:35,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50042 conditions, 4595 events. 2848/4595 cut-off events. For 989142/989156 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 26564 event pairs, 631 based on Foata normal form. 5/4562 useless extension candidates. Maximal degree in co-relation 49921. Up to 3942 conditions per place. [2024-06-27 19:49:35,074 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 291 selfloop transitions, 24 changer transitions 0/371 dead transitions. [2024-06-27 19:49:35,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 371 transitions, 3807 flow [2024-06-27 19:49:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:49:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:49:35,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:49:35,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 19:49:35,076 INFO L175 Difference]: Start difference. First operand has 254 places, 344 transitions, 3037 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:49:35,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 371 transitions, 3807 flow [2024-06-27 19:49:36,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 371 transitions, 3685 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 19:49:36,171 INFO L231 Difference]: Finished difference. Result has 256 places, 347 transitions, 3035 flow [2024-06-27 19:49:36,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3035, PETRI_PLACES=256, PETRI_TRANSITIONS=347} [2024-06-27 19:49:36,172 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-27 19:49:36,172 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 347 transitions, 3035 flow [2024-06-27 19:49:36,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:49:36,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:36,172 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 19:49:36,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:49:36,173 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:36,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash -504114255, now seen corresponding path program 1 times [2024-06-27 19:49:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:36,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941721673] [2024-06-27 19:49:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:36,864 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 19:49:36,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:36,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941721673] [2024-06-27 19:49:36,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941721673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:36,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:36,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:49:36,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828859740] [2024-06-27 19:49:36,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:36,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:49:36,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:36,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:49:36,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:49:36,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:49:36,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 347 transitions, 3035 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:49:36,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:36,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:49:36,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:38,010 INFO L124 PetriNetUnfolderBase]: 3098/4879 cut-off events. [2024-06-27 19:49:38,010 INFO L125 PetriNetUnfolderBase]: For 1019003/1019012 co-relation queries the response was YES. [2024-06-27 19:49:38,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52128 conditions, 4879 events. 3098/4879 cut-off events. For 1019003/1019012 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 27487 event pairs, 662 based on Foata normal form. 9/4871 useless extension candidates. Maximal degree in co-relation 52006. Up to 4390 conditions per place. [2024-06-27 19:49:38,074 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 314 selfloop transitions, 27 changer transitions 0/371 dead transitions. [2024-06-27 19:49:38,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 371 transitions, 3875 flow [2024-06-27 19:49:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:49:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:49:38,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 19:49:38,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-27 19:49:38,075 INFO L175 Difference]: Start difference. First operand has 256 places, 347 transitions, 3035 flow. Second operand 7 states and 139 transitions. [2024-06-27 19:49:38,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 371 transitions, 3875 flow [2024-06-27 19:49:39,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 371 transitions, 3777 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:49:39,484 INFO L231 Difference]: Finished difference. Result has 257 places, 350 transitions, 3090 flow [2024-06-27 19:49:39,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3090, PETRI_PLACES=257, PETRI_TRANSITIONS=350} [2024-06-27 19:49:39,485 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-27 19:49:39,485 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 350 transitions, 3090 flow [2024-06-27 19:49:39,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:49:39,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:39,485 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 19:49:39,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:49:39,486 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:39,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:39,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1262825027, now seen corresponding path program 2 times [2024-06-27 19:49:39,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:39,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410015613] [2024-06-27 19:49:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:39,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:40,246 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 19:49:40,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:40,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410015613] [2024-06-27 19:49:40,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410015613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:40,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:40,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:49:40,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354301236] [2024-06-27 19:49:40,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:40,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:49:40,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:40,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:49:40,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:49:40,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:49:40,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 350 transitions, 3090 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:49:40,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:40,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:49:40,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:41,330 INFO L124 PetriNetUnfolderBase]: 3111/4898 cut-off events. [2024-06-27 19:49:41,331 INFO L125 PetriNetUnfolderBase]: For 1046595/1046604 co-relation queries the response was YES. [2024-06-27 19:49:41,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53032 conditions, 4898 events. 3111/4898 cut-off events. For 1046595/1046604 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 27643 event pairs, 666 based on Foata normal form. 9/4890 useless extension candidates. Maximal degree in co-relation 52909. Up to 4394 conditions per place. [2024-06-27 19:49:41,393 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 309 selfloop transitions, 35 changer transitions 0/374 dead transitions. [2024-06-27 19:49:41,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 374 transitions, 4196 flow [2024-06-27 19:49:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:49:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:49:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 19:49:41,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-27 19:49:41,395 INFO L175 Difference]: Start difference. First operand has 257 places, 350 transitions, 3090 flow. Second operand 7 states and 138 transitions. [2024-06-27 19:49:41,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 374 transitions, 4196 flow [2024-06-27 19:49:43,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 374 transitions, 4067 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 19:49:43,170 INFO L231 Difference]: Finished difference. Result has 259 places, 356 transitions, 3227 flow [2024-06-27 19:49:43,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3227, PETRI_PLACES=259, PETRI_TRANSITIONS=356} [2024-06-27 19:49:43,171 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-27 19:49:43,171 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 356 transitions, 3227 flow [2024-06-27 19:49:43,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:49:43,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:43,171 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 19:49:43,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:49:43,172 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:43,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:43,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1077660171, now seen corresponding path program 5 times [2024-06-27 19:49:43,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:43,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532821872] [2024-06-27 19:49:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:43,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:44,121 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 19:49:44,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:44,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532821872] [2024-06-27 19:49:44,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532821872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:44,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:44,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:44,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663059824] [2024-06-27 19:49:44,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:44,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:44,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:44,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:44,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:44,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:44,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 356 transitions, 3227 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:44,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:44,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:44,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:45,596 INFO L124 PetriNetUnfolderBase]: 3286/5102 cut-off events. [2024-06-27 19:49:45,596 INFO L125 PetriNetUnfolderBase]: For 1083389/1083392 co-relation queries the response was YES. [2024-06-27 19:49:45,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55126 conditions, 5102 events. 3286/5102 cut-off events. For 1083389/1083392 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 28208 event pairs, 679 based on Foata normal form. 6/5105 useless extension candidates. Maximal degree in co-relation 55002. Up to 4526 conditions per place. [2024-06-27 19:49:45,657 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 313 selfloop transitions, 77 changer transitions 0/395 dead transitions. [2024-06-27 19:49:45,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 395 transitions, 4215 flow [2024-06-27 19:49:45,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:45,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 19:49:45,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-27 19:49:45,659 INFO L175 Difference]: Start difference. First operand has 259 places, 356 transitions, 3227 flow. Second operand 10 states and 194 transitions. [2024-06-27 19:49:45,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 395 transitions, 4215 flow [2024-06-27 19:49:46,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 395 transitions, 4087 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-27 19:49:46,967 INFO L231 Difference]: Finished difference. Result has 266 places, 358 transitions, 3354 flow [2024-06-27 19:49:46,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3099, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3354, PETRI_PLACES=266, PETRI_TRANSITIONS=358} [2024-06-27 19:49:46,968 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 221 predicate places. [2024-06-27 19:49:46,968 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 358 transitions, 3354 flow [2024-06-27 19:49:46,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:46,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:46,969 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 19:49:46,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:49:46,969 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:46,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:46,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1567232125, now seen corresponding path program 2 times [2024-06-27 19:49:46,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:46,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521257463] [2024-06-27 19:49:46,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:46,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:48,055 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 19:49:48,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:48,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521257463] [2024-06-27 19:49:48,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521257463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:48,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:48,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:48,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777673424] [2024-06-27 19:49:48,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:48,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:48,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:48,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:48,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:48,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 358 transitions, 3354 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:48,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:48,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:48,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:49,620 INFO L124 PetriNetUnfolderBase]: 3303/5129 cut-off events. [2024-06-27 19:49:49,620 INFO L125 PetriNetUnfolderBase]: For 1110274/1110277 co-relation queries the response was YES. [2024-06-27 19:49:49,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56016 conditions, 5129 events. 3303/5129 cut-off events. For 1110274/1110277 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 28386 event pairs, 662 based on Foata normal form. 4/5130 useless extension candidates. Maximal degree in co-relation 55890. Up to 4459 conditions per place. [2024-06-27 19:49:49,691 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 309 selfloop transitions, 87 changer transitions 0/401 dead transitions. [2024-06-27 19:49:49,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 401 transitions, 4386 flow [2024-06-27 19:49:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:49,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 19:49:49,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 19:49:49,693 INFO L175 Difference]: Start difference. First operand has 266 places, 358 transitions, 3354 flow. Second operand 10 states and 198 transitions. [2024-06-27 19:49:49,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 401 transitions, 4386 flow [2024-06-27 19:49:50,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 401 transitions, 4149 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-27 19:49:50,813 INFO L231 Difference]: Finished difference. Result has 269 places, 363 transitions, 3412 flow [2024-06-27 19:49:50,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3117, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3412, PETRI_PLACES=269, PETRI_TRANSITIONS=363} [2024-06-27 19:49:50,813 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-27 19:49:50,813 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 363 transitions, 3412 flow [2024-06-27 19:49:50,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:50,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:50,814 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 19:49:50,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:49:50,814 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:50,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1796920735, now seen corresponding path program 3 times [2024-06-27 19:49:50,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:50,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162535718] [2024-06-27 19:49:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:50,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:52,082 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 19:49:52,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:52,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162535718] [2024-06-27 19:49:52,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162535718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:52,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:52,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:52,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572958183] [2024-06-27 19:49:52,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:52,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:52,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:52,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:52,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 363 transitions, 3412 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:52,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:52,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:52,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:53,687 INFO L124 PetriNetUnfolderBase]: 3331/5187 cut-off events. [2024-06-27 19:49:53,688 INFO L125 PetriNetUnfolderBase]: For 1136275/1136278 co-relation queries the response was YES. [2024-06-27 19:49:53,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56945 conditions, 5187 events. 3331/5187 cut-off events. For 1136275/1136278 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 28917 event pairs, 672 based on Foata normal form. 4/5188 useless extension candidates. Maximal degree in co-relation 56817. Up to 4498 conditions per place. [2024-06-27 19:49:53,759 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 305 selfloop transitions, 97 changer transitions 0/407 dead transitions. [2024-06-27 19:49:53,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 407 transitions, 4477 flow [2024-06-27 19:49:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:53,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:53,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:49:53,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 19:49:53,760 INFO L175 Difference]: Start difference. First operand has 269 places, 363 transitions, 3412 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:49:53,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 407 transitions, 4477 flow [2024-06-27 19:49:55,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 407 transitions, 4216 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 19:49:55,231 INFO L231 Difference]: Finished difference. Result has 273 places, 371 transitions, 3516 flow [2024-06-27 19:49:55,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3516, PETRI_PLACES=273, PETRI_TRANSITIONS=371} [2024-06-27 19:49:55,232 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-27 19:49:55,232 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 371 transitions, 3516 flow [2024-06-27 19:49:55,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:55,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:55,232 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 19:49:55,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:49:55,233 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:55,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash -275347549, now seen corresponding path program 4 times [2024-06-27 19:49:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:55,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248431282] [2024-06-27 19:49:55,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:55,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:55,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:49:56,382 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 19:49:56,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:49:56,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248431282] [2024-06-27 19:49:56,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248431282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:49:56,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:49:56,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:49:56,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665601869] [2024-06-27 19:49:56,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:49:56,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:49:56,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:49:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:49:56,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:49:56,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:49:56,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 371 transitions, 3516 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:56,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:49:56,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:49:56,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:49:57,958 INFO L124 PetriNetUnfolderBase]: 3348/5199 cut-off events. [2024-06-27 19:49:57,959 INFO L125 PetriNetUnfolderBase]: For 1163606/1163609 co-relation queries the response was YES. [2024-06-27 19:49:58,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57811 conditions, 5199 events. 3348/5199 cut-off events. For 1163606/1163609 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 28827 event pairs, 662 based on Foata normal form. 4/5200 useless extension candidates. Maximal degree in co-relation 57681. Up to 4525 conditions per place. [2024-06-27 19:49:58,034 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 309 selfloop transitions, 95 changer transitions 0/409 dead transitions. [2024-06-27 19:49:58,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 409 transitions, 4532 flow [2024-06-27 19:49:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:49:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:49:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 19:49:58,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-27 19:49:58,036 INFO L175 Difference]: Start difference. First operand has 273 places, 371 transitions, 3516 flow. Second operand 10 states and 197 transitions. [2024-06-27 19:49:58,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 409 transitions, 4532 flow [2024-06-27 19:49:59,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 409 transitions, 4286 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-27 19:49:59,780 INFO L231 Difference]: Finished difference. Result has 278 places, 373 transitions, 3561 flow [2024-06-27 19:49:59,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3561, PETRI_PLACES=278, PETRI_TRANSITIONS=373} [2024-06-27 19:49:59,780 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-27 19:49:59,780 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 373 transitions, 3561 flow [2024-06-27 19:49:59,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:49:59,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:49:59,781 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 19:49:59,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:49:59,781 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:49:59,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:49:59,781 INFO L85 PathProgramCache]: Analyzing trace with hash -267005449, now seen corresponding path program 5 times [2024-06-27 19:49:59,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:49:59,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560966617] [2024-06-27 19:49:59,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:49:59,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:49:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:00,794 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 19:50:00,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:00,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560966617] [2024-06-27 19:50:00,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560966617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:00,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:00,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:50:00,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28272728] [2024-06-27 19:50:00,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:00,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:50:00,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:50:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:50:00,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:00,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 373 transitions, 3561 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:00,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:00,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:00,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:02,389 INFO L124 PetriNetUnfolderBase]: 3365/5226 cut-off events. [2024-06-27 19:50:02,389 INFO L125 PetriNetUnfolderBase]: For 1185164/1185167 co-relation queries the response was YES. [2024-06-27 19:50:02,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57549 conditions, 5226 events. 3365/5226 cut-off events. For 1185164/1185167 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 29029 event pairs, 658 based on Foata normal form. 4/5227 useless extension candidates. Maximal degree in co-relation 57418. Up to 4457 conditions per place. [2024-06-27 19:50:02,466 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 301 selfloop transitions, 106 changer transitions 0/412 dead transitions. [2024-06-27 19:50:02,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 412 transitions, 4583 flow [2024-06-27 19:50:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:50:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:50:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-27 19:50:02,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-27 19:50:02,468 INFO L175 Difference]: Start difference. First operand has 278 places, 373 transitions, 3561 flow. Second operand 10 states and 197 transitions. [2024-06-27 19:50:02,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 412 transitions, 4583 flow [2024-06-27 19:50:03,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 412 transitions, 4279 flow, removed 43 selfloop flow, removed 11 redundant places. [2024-06-27 19:50:03,880 INFO L231 Difference]: Finished difference. Result has 277 places, 375 transitions, 3568 flow [2024-06-27 19:50:03,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3257, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3568, PETRI_PLACES=277, PETRI_TRANSITIONS=375} [2024-06-27 19:50:03,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-27 19:50:03,880 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 375 transitions, 3568 flow [2024-06-27 19:50:03,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:03,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:03,881 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 19:50:03,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:50:03,881 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:03,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash 989127167, now seen corresponding path program 1 times [2024-06-27 19:50:03,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:03,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965484881] [2024-06-27 19:50:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:03,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:04,984 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 19:50:04,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:04,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965484881] [2024-06-27 19:50:04,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965484881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:04,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:04,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111418478] [2024-06-27 19:50:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:04,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:04,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:05,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:50:05,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 375 transitions, 3568 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 19:50:05,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:05,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:50:05,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:06,113 INFO L124 PetriNetUnfolderBase]: 2804/4597 cut-off events. [2024-06-27 19:50:06,113 INFO L125 PetriNetUnfolderBase]: For 1189239/1189263 co-relation queries the response was YES. [2024-06-27 19:50:06,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53695 conditions, 4597 events. 2804/4597 cut-off events. For 1189239/1189263 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 27333 event pairs, 623 based on Foata normal form. 6/4554 useless extension candidates. Maximal degree in co-relation 53566. Up to 3762 conditions per place. [2024-06-27 19:50:06,183 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 286 selfloop transitions, 19 changer transitions 0/397 dead transitions. [2024-06-27 19:50:06,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 397 transitions, 4318 flow [2024-06-27 19:50:06,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-27 19:50:06,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-27 19:50:06,184 INFO L175 Difference]: Start difference. First operand has 277 places, 375 transitions, 3568 flow. Second operand 8 states and 164 transitions. [2024-06-27 19:50:06,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 397 transitions, 4318 flow [2024-06-27 19:50:08,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 397 transitions, 4025 flow, removed 42 selfloop flow, removed 8 redundant places. [2024-06-27 19:50:08,484 INFO L231 Difference]: Finished difference. Result has 277 places, 378 transitions, 3403 flow [2024-06-27 19:50:08,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3403, PETRI_PLACES=277, PETRI_TRANSITIONS=378} [2024-06-27 19:50:08,484 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-27 19:50:08,484 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 378 transitions, 3403 flow [2024-06-27 19:50:08,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 19:50:08,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:08,485 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 19:50:08,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:50:08,485 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:08,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:08,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1686311291, now seen corresponding path program 2 times [2024-06-27 19:50:08,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:08,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296536998] [2024-06-27 19:50:08,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:08,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:09,421 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 19:50:09,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:09,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296536998] [2024-06-27 19:50:09,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296536998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:09,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:09,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:09,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841138730] [2024-06-27 19:50:09,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:09,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:09,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:09,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:09,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:09,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:50:09,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 378 transitions, 3403 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:50:09,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:09,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:50:09,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:10,501 INFO L124 PetriNetUnfolderBase]: 2983/4806 cut-off events. [2024-06-27 19:50:10,501 INFO L125 PetriNetUnfolderBase]: For 1213689/1213699 co-relation queries the response was YES. [2024-06-27 19:50:10,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55479 conditions, 4806 events. 2983/4806 cut-off events. For 1213689/1213699 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28066 event pairs, 633 based on Foata normal form. 1/4769 useless extension candidates. Maximal degree in co-relation 55349. Up to 4115 conditions per place. [2024-06-27 19:50:10,572 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 306 selfloop transitions, 36 changer transitions 0/402 dead transitions. [2024-06-27 19:50:10,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 402 transitions, 4483 flow [2024-06-27 19:50:10,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:10,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:50:10,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:50:10,573 INFO L175 Difference]: Start difference. First operand has 277 places, 378 transitions, 3403 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:50:10,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 402 transitions, 4483 flow [2024-06-27 19:50:12,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 402 transitions, 4377 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:12,088 INFO L231 Difference]: Finished difference. Result has 279 places, 384 transitions, 3533 flow [2024-06-27 19:50:12,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3533, PETRI_PLACES=279, PETRI_TRANSITIONS=384} [2024-06-27 19:50:12,089 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-27 19:50:12,089 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 384 transitions, 3533 flow [2024-06-27 19:50:12,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:50:12,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:12,090 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 19:50:12,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:50:12,090 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:12,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1686296907, now seen corresponding path program 3 times [2024-06-27 19:50:12,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:12,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260181257] [2024-06-27 19:50:12,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:12,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:13,132 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 19:50:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260181257] [2024-06-27 19:50:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260181257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:13,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:13,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:13,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64875921] [2024-06-27 19:50:13,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:13,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:13,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:13,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:50:13,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 384 transitions, 3533 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:50:13,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:13,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:50:13,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:14,397 INFO L124 PetriNetUnfolderBase]: 2988/4817 cut-off events. [2024-06-27 19:50:14,397 INFO L125 PetriNetUnfolderBase]: For 1240218/1240228 co-relation queries the response was YES. [2024-06-27 19:50:14,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56106 conditions, 4817 events. 2988/4817 cut-off events. For 1240218/1240228 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28099 event pairs, 633 based on Foata normal form. 1/4780 useless extension candidates. Maximal degree in co-relation 55975. Up to 4096 conditions per place. [2024-06-27 19:50:14,459 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 310 selfloop transitions, 35 changer transitions 0/405 dead transitions. [2024-06-27 19:50:14,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 405 transitions, 4369 flow [2024-06-27 19:50:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:50:14,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:50:14,460 INFO L175 Difference]: Start difference. First operand has 279 places, 384 transitions, 3533 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:50:14,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 405 transitions, 4369 flow [2024-06-27 19:50:15,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 405 transitions, 4264 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:15,620 INFO L231 Difference]: Finished difference. Result has 283 places, 387 transitions, 3600 flow [2024-06-27 19:50:15,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=275, 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=3600, PETRI_PLACES=283, PETRI_TRANSITIONS=387} [2024-06-27 19:50:15,621 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-27 19:50:15,621 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 387 transitions, 3600 flow [2024-06-27 19:50:15,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:50:15,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:15,621 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 19:50:15,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:50:15,622 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:15,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 989112721, now seen corresponding path program 3 times [2024-06-27 19:50:15,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:15,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221156291] [2024-06-27 19:50:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:15,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:17,033 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 19:50:17,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:17,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221156291] [2024-06-27 19:50:17,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221156291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:17,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:17,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:17,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455326489] [2024-06-27 19:50:17,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:17,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:17,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:17,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:17,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:17,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:50:17,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 387 transitions, 3600 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:50:17,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:17,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:50:17,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:18,257 INFO L124 PetriNetUnfolderBase]: 2985/4813 cut-off events. [2024-06-27 19:50:18,258 INFO L125 PetriNetUnfolderBase]: For 1259887/1259899 co-relation queries the response was YES. [2024-06-27 19:50:18,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56579 conditions, 4813 events. 2985/4813 cut-off events. For 1259887/1259899 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28101 event pairs, 633 based on Foata normal form. 1/4776 useless extension candidates. Maximal degree in co-relation 56446. Up to 4128 conditions per place. [2024-06-27 19:50:18,325 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 316 selfloop transitions, 28 changer transitions 0/404 dead transitions. [2024-06-27 19:50:18,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 404 transitions, 4340 flow [2024-06-27 19:50:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:50:18,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 19:50:18,326 INFO L175 Difference]: Start difference. First operand has 283 places, 387 transitions, 3600 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:50:18,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 404 transitions, 4340 flow [2024-06-27 19:50:20,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 404 transitions, 4136 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:20,469 INFO L231 Difference]: Finished difference. Result has 285 places, 387 transitions, 3458 flow [2024-06-27 19:50:20,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3458, PETRI_PLACES=285, PETRI_TRANSITIONS=387} [2024-06-27 19:50:20,470 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-27 19:50:20,470 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 387 transitions, 3458 flow [2024-06-27 19:50:20,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:50:20,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:20,470 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 19:50:20,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:50:20,471 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:20,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:20,471 INFO L85 PathProgramCache]: Analyzing trace with hash -286046433, now seen corresponding path program 3 times [2024-06-27 19:50:20,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:20,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179628268] [2024-06-27 19:50:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:20,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:21,259 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 19:50:21,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:21,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179628268] [2024-06-27 19:50:21,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179628268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:21,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:21,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:21,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724015941] [2024-06-27 19:50:21,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:21,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:21,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:21,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:21,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:21,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:50:21,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 387 transitions, 3458 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:50:21,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:21,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:50:21,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:22,518 INFO L124 PetriNetUnfolderBase]: 3226/5092 cut-off events. [2024-06-27 19:50:22,518 INFO L125 PetriNetUnfolderBase]: For 1291024/1291038 co-relation queries the response was YES. [2024-06-27 19:50:22,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57871 conditions, 5092 events. 3226/5092 cut-off events. For 1291024/1291038 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29040 event pairs, 662 based on Foata normal form. 11/5090 useless extension candidates. Maximal degree in co-relation 57737. Up to 4557 conditions per place. [2024-06-27 19:50:22,592 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 340 selfloop transitions, 27 changer transitions 0/406 dead transitions. [2024-06-27 19:50:22,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 406 transitions, 4260 flow [2024-06-27 19:50:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:22,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 19:50:22,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-27 19:50:22,593 INFO L175 Difference]: Start difference. First operand has 285 places, 387 transitions, 3458 flow. Second operand 7 states and 136 transitions. [2024-06-27 19:50:22,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 406 transitions, 4260 flow [2024-06-27 19:50:25,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 406 transitions, 4124 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-27 19:50:25,750 INFO L231 Difference]: Finished difference. Result has 285 places, 387 transitions, 3383 flow [2024-06-27 19:50:25,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3383, PETRI_PLACES=285, PETRI_TRANSITIONS=387} [2024-06-27 19:50:25,751 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 240 predicate places. [2024-06-27 19:50:25,751 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 387 transitions, 3383 flow [2024-06-27 19:50:25,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:50:25,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:25,751 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 19:50:25,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:50:25,751 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:25,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:25,752 INFO L85 PathProgramCache]: Analyzing trace with hash -271761633, now seen corresponding path program 4 times [2024-06-27 19:50:25,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537629993] [2024-06-27 19:50:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:25,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:26,636 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 19:50:26,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:26,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537629993] [2024-06-27 19:50:26,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537629993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:26,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:26,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:26,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668048226] [2024-06-27 19:50:26,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:26,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:26,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:26,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:26,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:26,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:50:26,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 387 transitions, 3383 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:50:26,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:26,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:50:26,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:27,821 INFO L124 PetriNetUnfolderBase]: 3233/5100 cut-off events. [2024-06-27 19:50:27,822 INFO L125 PetriNetUnfolderBase]: For 1309733/1309745 co-relation queries the response was YES. [2024-06-27 19:50:27,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58189 conditions, 5100 events. 3233/5100 cut-off events. For 1309733/1309745 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29038 event pairs, 662 based on Foata normal form. 9/5089 useless extension candidates. Maximal degree in co-relation 58054. Up to 4553 conditions per place. [2024-06-27 19:50:27,894 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 332 selfloop transitions, 35 changer transitions 0/406 dead transitions. [2024-06-27 19:50:27,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 406 transitions, 4277 flow [2024-06-27 19:50:27,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:27,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 19:50:27,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-27 19:50:27,896 INFO L175 Difference]: Start difference. First operand has 285 places, 387 transitions, 3383 flow. Second operand 7 states and 134 transitions. [2024-06-27 19:50:27,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 406 transitions, 4277 flow [2024-06-27 19:50:30,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 406 transitions, 4203 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:30,490 INFO L231 Difference]: Finished difference. Result has 286 places, 390 transitions, 3495 flow [2024-06-27 19:50:30,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3309, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3495, PETRI_PLACES=286, PETRI_TRANSITIONS=390} [2024-06-27 19:50:30,490 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-27 19:50:30,490 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 390 transitions, 3495 flow [2024-06-27 19:50:30,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:50:30,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:30,491 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 19:50:30,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:50:30,491 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:30,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1831909151, now seen corresponding path program 5 times [2024-06-27 19:50:30,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:30,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076879060] [2024-06-27 19:50:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:30,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:31,452 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 19:50:31,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:31,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076879060] [2024-06-27 19:50:31,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076879060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:31,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:31,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689572813] [2024-06-27 19:50:31,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:31,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:31,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:31,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:31,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:50:31,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 390 transitions, 3495 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:50:31,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:31,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:50:31,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:32,614 INFO L124 PetriNetUnfolderBase]: 3238/5109 cut-off events. [2024-06-27 19:50:32,614 INFO L125 PetriNetUnfolderBase]: For 1336863/1336878 co-relation queries the response was YES. [2024-06-27 19:50:32,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58912 conditions, 5109 events. 3238/5109 cut-off events. For 1336863/1336878 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29124 event pairs, 676 based on Foata normal form. 11/5097 useless extension candidates. Maximal degree in co-relation 58776. Up to 4536 conditions per place. [2024-06-27 19:50:32,690 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 318 selfloop transitions, 52 changer transitions 0/409 dead transitions. [2024-06-27 19:50:32,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 409 transitions, 4697 flow [2024-06-27 19:50:32,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:32,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:32,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 19:50:32,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-27 19:50:32,691 INFO L175 Difference]: Start difference. First operand has 286 places, 390 transitions, 3495 flow. Second operand 7 states and 134 transitions. [2024-06-27 19:50:32,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 409 transitions, 4697 flow [2024-06-27 19:50:35,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 409 transitions, 4533 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:35,203 INFO L231 Difference]: Finished difference. Result has 288 places, 396 transitions, 3667 flow [2024-06-27 19:50:35,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3667, PETRI_PLACES=288, PETRI_TRANSITIONS=396} [2024-06-27 19:50:35,204 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-27 19:50:35,204 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 396 transitions, 3667 flow [2024-06-27 19:50:35,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:50:35,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:35,205 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 19:50:35,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:50:35,205 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:35,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:35,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1839527711, now seen corresponding path program 6 times [2024-06-27 19:50:35,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:35,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128745227] [2024-06-27 19:50:35,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:35,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:36,115 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 19:50:36,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:36,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128745227] [2024-06-27 19:50:36,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128745227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:36,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:36,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:36,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839236568] [2024-06-27 19:50:36,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:36,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:36,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:36,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:36,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:36,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:50:36,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 396 transitions, 3667 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:50:36,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:36,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:50:36,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:37,262 INFO L124 PetriNetUnfolderBase]: 3235/5105 cut-off events. [2024-06-27 19:50:37,262 INFO L125 PetriNetUnfolderBase]: For 1366885/1366902 co-relation queries the response was YES. [2024-06-27 19:50:37,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59277 conditions, 5105 events. 3235/5105 cut-off events. For 1366885/1366902 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29133 event pairs, 676 based on Foata normal form. 13/5102 useless extension candidates. Maximal degree in co-relation 59140. Up to 4533 conditions per place. [2024-06-27 19:50:37,337 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 317 selfloop transitions, 52 changer transitions 0/408 dead transitions. [2024-06-27 19:50:37,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 408 transitions, 4445 flow [2024-06-27 19:50:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:37,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:37,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 19:50:37,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 19:50:37,339 INFO L175 Difference]: Start difference. First operand has 288 places, 396 transitions, 3667 flow. Second operand 7 states and 133 transitions. [2024-06-27 19:50:37,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 408 transitions, 4445 flow [2024-06-27 19:50:39,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 408 transitions, 4167 flow, removed 102 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:39,739 INFO L231 Difference]: Finished difference. Result has 291 places, 396 transitions, 3499 flow [2024-06-27 19:50:39,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3389, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3499, PETRI_PLACES=291, PETRI_TRANSITIONS=396} [2024-06-27 19:50:39,740 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-27 19:50:39,740 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 396 transitions, 3499 flow [2024-06-27 19:50:39,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 19:50:39,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:39,740 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 19:50:39,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:50:39,741 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:39,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:39,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1198553275, now seen corresponding path program 6 times [2024-06-27 19:50:39,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:39,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109133105] [2024-06-27 19:50:39,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:39,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:40,711 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 19:50:40,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:40,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109133105] [2024-06-27 19:50:40,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109133105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:40,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:50:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532763864] [2024-06-27 19:50:40,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:40,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:50:40,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:40,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:50:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:50:40,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:40,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 396 transitions, 3499 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:40,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:40,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:40,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:42,396 INFO L124 PetriNetUnfolderBase]: 3391/5267 cut-off events. [2024-06-27 19:50:42,397 INFO L125 PetriNetUnfolderBase]: For 1378592/1378592 co-relation queries the response was YES. [2024-06-27 19:50:42,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60000 conditions, 5267 events. 3391/5267 cut-off events. For 1378592/1378592 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29258 event pairs, 689 based on Foata normal form. 4/5256 useless extension candidates. Maximal degree in co-relation 59862. Up to 4686 conditions per place. [2024-06-27 19:50:42,477 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 349 selfloop transitions, 77 changer transitions 0/431 dead transitions. [2024-06-27 19:50:42,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 431 transitions, 4561 flow [2024-06-27 19:50:42,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:50:42,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:50:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 19:50:42,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-27 19:50:42,479 INFO L175 Difference]: Start difference. First operand has 291 places, 396 transitions, 3499 flow. Second operand 10 states and 191 transitions. [2024-06-27 19:50:42,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 431 transitions, 4561 flow [2024-06-27 19:50:45,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 431 transitions, 4439 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:45,689 INFO L231 Difference]: Finished difference. Result has 295 places, 398 transitions, 3646 flow [2024-06-27 19:50:45,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3377, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3646, PETRI_PLACES=295, PETRI_TRANSITIONS=398} [2024-06-27 19:50:45,689 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 250 predicate places. [2024-06-27 19:50:45,689 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 398 transitions, 3646 flow [2024-06-27 19:50:45,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:45,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:45,690 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 19:50:45,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:50:45,690 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:45,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:45,690 INFO L85 PathProgramCache]: Analyzing trace with hash 207511395, now seen corresponding path program 6 times [2024-06-27 19:50:45,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:45,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129870125] [2024-06-27 19:50:45,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:45,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:46,894 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 19:50:46,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:46,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129870125] [2024-06-27 19:50:46,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129870125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:46,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:46,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:50:46,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115326607] [2024-06-27 19:50:46,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:46,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:50:46,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:46,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:50:46,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:50:47,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:47,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 398 transitions, 3646 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:47,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:47,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:47,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:48,477 INFO L124 PetriNetUnfolderBase]: 3419/5315 cut-off events. [2024-06-27 19:50:48,478 INFO L125 PetriNetUnfolderBase]: For 1410026/1410035 co-relation queries the response was YES. [2024-06-27 19:50:48,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60982 conditions, 5315 events. 3419/5315 cut-off events. For 1410026/1410035 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29626 event pairs, 662 based on Foata normal form. 10/5314 useless extension candidates. Maximal degree in co-relation 60843. Up to 4627 conditions per place. [2024-06-27 19:50:48,559 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 324 selfloop transitions, 114 changer transitions 0/443 dead transitions. [2024-06-27 19:50:48,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 443 transitions, 4793 flow [2024-06-27 19:50:48,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:50:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:50:48,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 19:50:48,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-27 19:50:48,560 INFO L175 Difference]: Start difference. First operand has 295 places, 398 transitions, 3646 flow. Second operand 10 states and 191 transitions. [2024-06-27 19:50:48,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 443 transitions, 4793 flow [2024-06-27 19:50:51,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 443 transitions, 4542 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-27 19:50:51,121 INFO L231 Difference]: Finished difference. Result has 298 places, 410 transitions, 3843 flow [2024-06-27 19:50:51,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3395, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3843, PETRI_PLACES=298, PETRI_TRANSITIONS=410} [2024-06-27 19:50:51,122 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-27 19:50:51,122 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 410 transitions, 3843 flow [2024-06-27 19:50:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:51,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:51,123 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 19:50:51,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:50:51,123 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:51,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:51,123 INFO L85 PathProgramCache]: Analyzing trace with hash -602573769, now seen corresponding path program 7 times [2024-06-27 19:50:51,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:51,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274102876] [2024-06-27 19:50:51,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:51,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:52,257 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 19:50:52,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:52,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274102876] [2024-06-27 19:50:52,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274102876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:52,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:52,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:50:52,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479727585] [2024-06-27 19:50:52,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:52,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:50:52,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:52,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:50:52,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:50:52,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:52,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 410 transitions, 3843 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:52,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:52,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:52,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:53,971 INFO L124 PetriNetUnfolderBase]: 3436/5352 cut-off events. [2024-06-27 19:50:53,971 INFO L125 PetriNetUnfolderBase]: For 1439160/1439169 co-relation queries the response was YES. [2024-06-27 19:50:54,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61999 conditions, 5352 events. 3436/5352 cut-off events. For 1439160/1439169 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 29975 event pairs, 665 based on Foata normal form. 10/5351 useless extension candidates. Maximal degree in co-relation 61858. Up to 4654 conditions per place. [2024-06-27 19:50:54,057 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 339 selfloop transitions, 104 changer transitions 0/448 dead transitions. [2024-06-27 19:50:54,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 448 transitions, 4956 flow [2024-06-27 19:50:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:50:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:50:54,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:50:54,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-27 19:50:54,058 INFO L175 Difference]: Start difference. First operand has 298 places, 410 transitions, 3843 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:50:54,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 448 transitions, 4956 flow [2024-06-27 19:50:57,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 448 transitions, 4713 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:57,259 INFO L231 Difference]: Finished difference. Result has 304 places, 413 transitions, 3940 flow [2024-06-27 19:50:57,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3600, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3940, PETRI_PLACES=304, PETRI_TRANSITIONS=413} [2024-06-27 19:50:57,260 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 259 predicate places. [2024-06-27 19:50:57,260 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 413 transitions, 3940 flow [2024-06-27 19:50:57,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:57,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:57,261 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 19:50:57,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:50:57,261 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:57,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:57,262 INFO L85 PathProgramCache]: Analyzing trace with hash -380928729, now seen corresponding path program 8 times [2024-06-27 19:50:57,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:57,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683764232] [2024-06-27 19:50:57,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:57,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:58,423 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 19:50:58,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683764232] [2024-06-27 19:50:58,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683764232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:58,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:58,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:50:58,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749152866] [2024-06-27 19:50:58,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:58,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:50:58,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:58,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:50:58,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:50:58,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:50:58,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 413 transitions, 3940 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:50:58,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:58,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:50:58,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:00,158 INFO L124 PetriNetUnfolderBase]: 3464/5390 cut-off events. [2024-06-27 19:51:00,158 INFO L125 PetriNetUnfolderBase]: For 1465496/1465505 co-relation queries the response was YES. [2024-06-27 19:51:00,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61899 conditions, 5390 events. 3464/5390 cut-off events. For 1465496/1465505 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30177 event pairs, 667 based on Foata normal form. 10/5389 useless extension candidates. Maximal degree in co-relation 61756. Up to 4693 conditions per place. [2024-06-27 19:51:00,232 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 344 selfloop transitions, 104 changer transitions 0/453 dead transitions. [2024-06-27 19:51:00,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 453 transitions, 5093 flow [2024-06-27 19:51:00,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:00,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:00,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 19:51:00,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 19:51:00,234 INFO L175 Difference]: Start difference. First operand has 304 places, 413 transitions, 3940 flow. Second operand 10 states and 195 transitions. [2024-06-27 19:51:00,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 453 transitions, 5093 flow [2024-06-27 19:51:02,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 453 transitions, 4780 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 19:51:02,285 INFO L231 Difference]: Finished difference. Result has 308 places, 419 transitions, 4005 flow [2024-06-27 19:51:02,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3633, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4005, PETRI_PLACES=308, PETRI_TRANSITIONS=419} [2024-06-27 19:51:02,285 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-27 19:51:02,285 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 419 transitions, 4005 flow [2024-06-27 19:51:02,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:02,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:02,286 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 19:51:02,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:51:02,286 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:02,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:02,286 INFO L85 PathProgramCache]: Analyzing trace with hash -134776965, now seen corresponding path program 9 times [2024-06-27 19:51:02,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058226101] [2024-06-27 19:51:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:03,510 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 19:51:03,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:03,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058226101] [2024-06-27 19:51:03,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058226101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:03,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:03,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:03,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659311146] [2024-06-27 19:51:03,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:03,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:03,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:03,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:03,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:03,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 419 transitions, 4005 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:03,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:03,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:03,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:05,148 INFO L124 PetriNetUnfolderBase]: 3481/5422 cut-off events. [2024-06-27 19:51:05,148 INFO L125 PetriNetUnfolderBase]: For 1494754/1494763 co-relation queries the response was YES. [2024-06-27 19:51:05,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62441 conditions, 5422 events. 3481/5422 cut-off events. For 1494754/1494763 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 30425 event pairs, 672 based on Foata normal form. 10/5421 useless extension candidates. Maximal degree in co-relation 62296. Up to 4679 conditions per place. [2024-06-27 19:51:05,228 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 328 selfloop transitions, 122 changer transitions 0/455 dead transitions. [2024-06-27 19:51:05,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 455 transitions, 5117 flow [2024-06-27 19:51:05,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:05,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:05,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:51:05,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-27 19:51:05,229 INFO L175 Difference]: Start difference. First operand has 308 places, 419 transitions, 4005 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:51:05,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 455 transitions, 5117 flow [2024-06-27 19:51:07,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 455 transitions, 4804 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-27 19:51:07,608 INFO L231 Difference]: Finished difference. Result has 311 places, 421 transitions, 4055 flow [2024-06-27 19:51:07,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3692, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4055, PETRI_PLACES=311, PETRI_TRANSITIONS=421} [2024-06-27 19:51:07,608 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-27 19:51:07,609 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 421 transitions, 4055 flow [2024-06-27 19:51:07,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:07,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:07,609 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 19:51:07,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:51:07,609 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:07,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1669367151, now seen corresponding path program 10 times [2024-06-27 19:51:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:07,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414324515] [2024-06-27 19:51:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:07,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:08,722 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 19:51:08,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:08,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414324515] [2024-06-27 19:51:08,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414324515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:08,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:08,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:08,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938193736] [2024-06-27 19:51:08,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:08,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:08,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:08,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:08,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:08,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:08,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 421 transitions, 4055 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:08,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:08,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:08,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:10,226 INFO L124 PetriNetUnfolderBase]: 3498/5449 cut-off events. [2024-06-27 19:51:10,226 INFO L125 PetriNetUnfolderBase]: For 1524579/1524588 co-relation queries the response was YES. [2024-06-27 19:51:10,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63054 conditions, 5449 events. 3498/5449 cut-off events. For 1524579/1524588 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30633 event pairs, 618 based on Foata normal form. 10/5448 useless extension candidates. Maximal degree in co-relation 62908. Up to 4408 conditions per place. [2024-06-27 19:51:10,314 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 312 selfloop transitions, 145 changer transitions 0/462 dead transitions. [2024-06-27 19:51:10,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 462 transitions, 5669 flow [2024-06-27 19:51:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 19:51:10,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 19:51:10,315 INFO L175 Difference]: Start difference. First operand has 311 places, 421 transitions, 4055 flow. Second operand 10 states and 195 transitions. [2024-06-27 19:51:10,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 462 transitions, 5669 flow [2024-06-27 19:51:12,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 462 transitions, 5324 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:12,864 INFO L231 Difference]: Finished difference. Result has 313 places, 425 transitions, 4235 flow [2024-06-27 19:51:12,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4235, PETRI_PLACES=313, PETRI_TRANSITIONS=425} [2024-06-27 19:51:12,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-27 19:51:12,865 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 425 transitions, 4235 flow [2024-06-27 19:51:12,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:12,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:12,865 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 19:51:12,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:51:12,866 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:12,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -157773515, now seen corresponding path program 11 times [2024-06-27 19:51:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008688438] [2024-06-27 19:51:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:14,050 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 19:51:14,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:14,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008688438] [2024-06-27 19:51:14,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008688438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:14,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:14,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:14,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047393436] [2024-06-27 19:51:14,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:14,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:14,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:14,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:14,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:14,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 425 transitions, 4235 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:14,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:14,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:14,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:15,826 INFO L124 PetriNetUnfolderBase]: 3526/5492 cut-off events. [2024-06-27 19:51:15,826 INFO L125 PetriNetUnfolderBase]: For 1555664/1555673 co-relation queries the response was YES. [2024-06-27 19:51:15,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63823 conditions, 5492 events. 3526/5492 cut-off events. For 1555664/1555673 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30891 event pairs, 682 based on Foata normal form. 10/5491 useless extension candidates. Maximal degree in co-relation 63676. Up to 4786 conditions per place. [2024-06-27 19:51:15,909 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 343 selfloop transitions, 115 changer transitions 0/463 dead transitions. [2024-06-27 19:51:15,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 463 transitions, 5399 flow [2024-06-27 19:51:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:15,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:15,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 19:51:15,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-27 19:51:15,911 INFO L175 Difference]: Start difference. First operand has 313 places, 425 transitions, 4235 flow. Second operand 10 states and 193 transitions. [2024-06-27 19:51:15,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 463 transitions, 5399 flow [2024-06-27 19:51:19,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 463 transitions, 5093 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:19,281 INFO L231 Difference]: Finished difference. Result has 317 places, 430 transitions, 4316 flow [2024-06-27 19:51:19,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3956, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4316, PETRI_PLACES=317, PETRI_TRANSITIONS=430} [2024-06-27 19:51:19,281 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-27 19:51:19,282 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 430 transitions, 4316 flow [2024-06-27 19:51:19,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:19,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:19,282 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 19:51:19,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:51:19,282 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:19,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:19,283 INFO L85 PathProgramCache]: Analyzing trace with hash -157474985, now seen corresponding path program 12 times [2024-06-27 19:51:19,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:19,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918036754] [2024-06-27 19:51:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:19,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:20,301 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 19:51:20,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:20,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918036754] [2024-06-27 19:51:20,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918036754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:20,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:20,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:20,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387769895] [2024-06-27 19:51:20,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:20,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:20,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:20,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:20,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:20,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 430 transitions, 4316 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:20,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:20,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:20,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:22,002 INFO L124 PetriNetUnfolderBase]: 3568/5553 cut-off events. [2024-06-27 19:51:22,002 INFO L125 PetriNetUnfolderBase]: For 1600956/1600965 co-relation queries the response was YES. [2024-06-27 19:51:22,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65127 conditions, 5553 events. 3568/5553 cut-off events. For 1600956/1600965 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 31247 event pairs, 674 based on Foata normal form. 10/5552 useless extension candidates. Maximal degree in co-relation 64978. Up to 4787 conditions per place. [2024-06-27 19:51:22,082 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 345 selfloop transitions, 120 changer transitions 0/470 dead transitions. [2024-06-27 19:51:22,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 470 transitions, 5920 flow [2024-06-27 19:51:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:22,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-27 19:51:22,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-27 19:51:22,083 INFO L175 Difference]: Start difference. First operand has 317 places, 430 transitions, 4316 flow. Second operand 10 states and 196 transitions. [2024-06-27 19:51:22,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 470 transitions, 5920 flow [2024-06-27 19:51:25,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 470 transitions, 5581 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-27 19:51:25,509 INFO L231 Difference]: Finished difference. Result has 317 places, 434 transitions, 4420 flow [2024-06-27 19:51:25,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3977, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4420, PETRI_PLACES=317, PETRI_TRANSITIONS=434} [2024-06-27 19:51:25,510 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-27 19:51:25,510 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 434 transitions, 4420 flow [2024-06-27 19:51:25,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:25,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:25,510 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 19:51:25,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:51:25,511 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:25,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:25,511 INFO L85 PathProgramCache]: Analyzing trace with hash 739158359, now seen corresponding path program 13 times [2024-06-27 19:51:25,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:25,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935578968] [2024-06-27 19:51:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:25,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:26,608 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 19:51:26,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:26,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935578968] [2024-06-27 19:51:26,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935578968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:26,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:26,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:26,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333779920] [2024-06-27 19:51:26,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:26,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:26,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:26,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:26,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:26,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:26,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 434 transitions, 4420 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:26,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:26,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:26,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:28,336 INFO L124 PetriNetUnfolderBase]: 3585/5590 cut-off events. [2024-06-27 19:51:28,336 INFO L125 PetriNetUnfolderBase]: For 1630133/1630142 co-relation queries the response was YES. [2024-06-27 19:51:28,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65486 conditions, 5590 events. 3585/5590 cut-off events. For 1630133/1630142 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 31598 event pairs, 694 based on Foata normal form. 10/5589 useless extension candidates. Maximal degree in co-relation 65341. Up to 4879 conditions per place. [2024-06-27 19:51:28,420 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 357 selfloop transitions, 108 changer transitions 0/470 dead transitions. [2024-06-27 19:51:28,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 470 transitions, 5558 flow [2024-06-27 19:51:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:28,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 19:51:28,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-27 19:51:28,421 INFO L175 Difference]: Start difference. First operand has 317 places, 434 transitions, 4420 flow. Second operand 10 states and 194 transitions. [2024-06-27 19:51:28,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 470 transitions, 5558 flow [2024-06-27 19:51:31,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 470 transitions, 5335 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:31,451 INFO L231 Difference]: Finished difference. Result has 321 places, 436 transitions, 4524 flow [2024-06-27 19:51:31,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4524, PETRI_PLACES=321, PETRI_TRANSITIONS=436} [2024-06-27 19:51:31,451 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-27 19:51:31,452 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 436 transitions, 4524 flow [2024-06-27 19:51:31,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:31,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:31,452 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 19:51:31,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:51:31,452 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:31,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:31,453 INFO L85 PathProgramCache]: Analyzing trace with hash -165817085, now seen corresponding path program 14 times [2024-06-27 19:51:31,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:31,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098407105] [2024-06-27 19:51:31,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:31,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:32,587 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 19:51:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098407105] [2024-06-27 19:51:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098407105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:32,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:32,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:32,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871965548] [2024-06-27 19:51:32,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:32,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:32,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:32,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:32,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:32,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:32,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 436 transitions, 4524 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:32,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:32,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:32,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:34,334 INFO L124 PetriNetUnfolderBase]: 3577/5563 cut-off events. [2024-06-27 19:51:34,334 INFO L125 PetriNetUnfolderBase]: For 1637672/1637681 co-relation queries the response was YES. [2024-06-27 19:51:34,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65267 conditions, 5563 events. 3577/5563 cut-off events. For 1637672/1637681 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31295 event pairs, 677 based on Foata normal form. 10/5562 useless extension candidates. Maximal degree in co-relation 65120. Up to 4867 conditions per place. [2024-06-27 19:51:34,416 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 348 selfloop transitions, 116 changer transitions 0/469 dead transitions. [2024-06-27 19:51:34,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 469 transitions, 5554 flow [2024-06-27 19:51:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 19:51:34,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-27 19:51:34,418 INFO L175 Difference]: Start difference. First operand has 321 places, 436 transitions, 4524 flow. Second operand 10 states and 192 transitions. [2024-06-27 19:51:34,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 469 transitions, 5554 flow [2024-06-27 19:51:38,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 469 transitions, 5138 flow, removed 87 selfloop flow, removed 7 redundant places. [2024-06-27 19:51:38,560 INFO L231 Difference]: Finished difference. Result has 324 places, 436 transitions, 4347 flow [2024-06-27 19:51:38,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4347, PETRI_PLACES=324, PETRI_TRANSITIONS=436} [2024-06-27 19:51:38,561 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-27 19:51:38,561 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 436 transitions, 4347 flow [2024-06-27 19:51:38,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:38,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:38,562 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 19:51:38,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:51:38,562 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:38,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:38,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1096536619, now seen corresponding path program 15 times [2024-06-27 19:51:38,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:38,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754131492] [2024-06-27 19:51:38,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:38,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:39,621 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 19:51:39,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:39,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754131492] [2024-06-27 19:51:39,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754131492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:39,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:39,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:39,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236239060] [2024-06-27 19:51:39,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:39,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:39,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:39,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:39,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:39,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:51:39,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 436 transitions, 4347 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:39,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:39,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:51:39,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:41,300 INFO L124 PetriNetUnfolderBase]: 3569/5556 cut-off events. [2024-06-27 19:51:41,301 INFO L125 PetriNetUnfolderBase]: For 1640643/1640652 co-relation queries the response was YES. [2024-06-27 19:51:41,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64498 conditions, 5556 events. 3569/5556 cut-off events. For 1640643/1640652 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31327 event pairs, 675 based on Foata normal form. 10/5555 useless extension candidates. Maximal degree in co-relation 64350. Up to 4778 conditions per place. [2024-06-27 19:51:41,375 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 351 selfloop transitions, 115 changer transitions 0/471 dead transitions. [2024-06-27 19:51:41,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 471 transitions, 5389 flow [2024-06-27 19:51:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 19:51:41,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 19:51:41,377 INFO L175 Difference]: Start difference. First operand has 324 places, 436 transitions, 4347 flow. Second operand 10 states and 195 transitions. [2024-06-27 19:51:41,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 471 transitions, 5389 flow [2024-06-27 19:51:45,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 471 transitions, 5099 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 19:51:45,244 INFO L231 Difference]: Finished difference. Result has 325 places, 436 transitions, 4294 flow [2024-06-27 19:51:45,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4294, PETRI_PLACES=325, PETRI_TRANSITIONS=436} [2024-06-27 19:51:45,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-27 19:51:45,245 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 436 transitions, 4294 flow [2024-06-27 19:51:45,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 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 19:51:45,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:45,245 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 19:51:45,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:51:45,246 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:45,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:45,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1831918079, now seen corresponding path program 2 times [2024-06-27 19:51:45,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:45,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503480106] [2024-06-27 19:51:45,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:45,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:46,441 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 19:51:46,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:46,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503480106] [2024-06-27 19:51:46,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503480106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:46,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:46,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32502937] [2024-06-27 19:51:46,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:46,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:46,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:46,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:46,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:46,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:51:46,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 436 transitions, 4294 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 19:51:46,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:46,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:51:46,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:47,645 INFO L124 PetriNetUnfolderBase]: 3000/4933 cut-off events. [2024-06-27 19:51:47,645 INFO L125 PetriNetUnfolderBase]: For 1647705/1647731 co-relation queries the response was YES. [2024-06-27 19:51:47,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60318 conditions, 4933 events. 3000/4933 cut-off events. For 1647705/1647731 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 29794 event pairs, 643 based on Foata normal form. 12/4898 useless extension candidates. Maximal degree in co-relation 60169. Up to 3983 conditions per place. [2024-06-27 19:51:47,726 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 315 selfloop transitions, 24 changer transitions 0/453 dead transitions. [2024-06-27 19:51:47,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 453 transitions, 5108 flow [2024-06-27 19:51:47,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:47,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:51:47,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:51:47,727 INFO L175 Difference]: Start difference. First operand has 325 places, 436 transitions, 4294 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:51:47,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 453 transitions, 5108 flow [2024-06-27 19:51:51,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 453 transitions, 4681 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-27 19:51:51,203 INFO L231 Difference]: Finished difference. Result has 323 places, 439 transitions, 4017 flow [2024-06-27 19:51:51,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3867, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4017, PETRI_PLACES=323, PETRI_TRANSITIONS=439} [2024-06-27 19:51:51,203 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-27 19:51:51,203 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 439 transitions, 4017 flow [2024-06-27 19:51:51,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 19:51:51,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:51,204 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 19:51:51,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:51:51,204 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:51,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1831917583, now seen corresponding path program 4 times [2024-06-27 19:51:51,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:51,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712162164] [2024-06-27 19:51:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:51,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:52,514 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 19:51:52,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:52,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712162164] [2024-06-27 19:51:52,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712162164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:52,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:52,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:52,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283316550] [2024-06-27 19:51:52,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:52,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:52,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:52,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:52,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:52,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:51:52,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 439 transitions, 4017 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:51:52,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:52,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:51:52,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:53,742 INFO L124 PetriNetUnfolderBase]: 3182/5127 cut-off events. [2024-06-27 19:51:53,742 INFO L125 PetriNetUnfolderBase]: For 1681580/1681603 co-relation queries the response was YES. [2024-06-27 19:51:53,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62109 conditions, 5127 events. 3182/5127 cut-off events. For 1681580/1681603 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30150 event pairs, 648 based on Foata normal form. 9/5091 useless extension candidates. Maximal degree in co-relation 61960. Up to 4419 conditions per place. [2024-06-27 19:51:53,824 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 354 selfloop transitions, 40 changer transitions 0/458 dead transitions. [2024-06-27 19:51:53,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 458 transitions, 5263 flow [2024-06-27 19:51:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:53,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:53,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:51:53,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 19:51:53,826 INFO L175 Difference]: Start difference. First operand has 323 places, 439 transitions, 4017 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:51:53,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 458 transitions, 5263 flow [2024-06-27 19:51:58,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 458 transitions, 5135 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:58,596 INFO L231 Difference]: Finished difference. Result has 325 places, 445 transitions, 4173 flow [2024-06-27 19:51:58,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4173, PETRI_PLACES=325, PETRI_TRANSITIONS=445} [2024-06-27 19:51:58,596 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-27 19:51:58,596 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 445 transitions, 4173 flow [2024-06-27 19:51:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:51:58,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:58,597 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 19:51:58,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:51:58,597 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:58,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:58,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1848107519, now seen corresponding path program 3 times [2024-06-27 19:51:58,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:58,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221299264] [2024-06-27 19:51:58,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:58,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:59,921 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 19:51:59,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:59,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221299264] [2024-06-27 19:51:59,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221299264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:59,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:59,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:59,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910879049] [2024-06-27 19:51:59,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:59,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:59,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:59,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:59,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:00,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:52:00,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 445 transitions, 4173 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 19:52:00,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:00,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:52:00,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:01,272 INFO L124 PetriNetUnfolderBase]: 3007/4955 cut-off events. [2024-06-27 19:52:01,273 INFO L125 PetriNetUnfolderBase]: For 1710870/1710884 co-relation queries the response was YES. [2024-06-27 19:52:01,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60884 conditions, 4955 events. 3007/4955 cut-off events. For 1710870/1710884 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30066 event pairs, 653 based on Foata normal form. 4/4923 useless extension candidates. Maximal degree in co-relation 60734. Up to 4026 conditions per place. [2024-06-27 19:52:01,347 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 326 selfloop transitions, 19 changer transitions 0/461 dead transitions. [2024-06-27 19:52:01,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 461 transitions, 5000 flow [2024-06-27 19:52:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:01,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:01,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:52:01,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 19:52:01,349 INFO L175 Difference]: Start difference. First operand has 325 places, 445 transitions, 4173 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:52:01,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 461 transitions, 5000 flow [2024-06-27 19:52:03,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 461 transitions, 4859 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-27 19:52:03,983 INFO L231 Difference]: Finished difference. Result has 329 places, 448 transitions, 4181 flow [2024-06-27 19:52:03,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4032, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=329, PETRI_TRANSITIONS=448} [2024-06-27 19:52:03,983 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-27 19:52:03,983 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 448 transitions, 4181 flow [2024-06-27 19:52:03,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 19:52:03,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:03,984 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 19:52:03,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:52:03,984 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:03,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:03,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1847572273, now seen corresponding path program 5 times [2024-06-27 19:52:03,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:03,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715171767] [2024-06-27 19:52:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:03,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:05,167 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 19:52:05,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:05,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715171767] [2024-06-27 19:52:05,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715171767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:05,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:05,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:05,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233768563] [2024-06-27 19:52:05,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:05,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:05,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:05,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:05,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:05,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:52:05,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 448 transitions, 4181 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:05,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:05,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:52:05,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:06,364 INFO L124 PetriNetUnfolderBase]: 3189/5137 cut-off events. [2024-06-27 19:52:06,365 INFO L125 PetriNetUnfolderBase]: For 1732745/1732768 co-relation queries the response was YES. [2024-06-27 19:52:06,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63130 conditions, 5137 events. 3189/5137 cut-off events. For 1732745/1732768 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30256 event pairs, 649 based on Foata normal form. 9/5101 useless extension candidates. Maximal degree in co-relation 62978. Up to 4408 conditions per place. [2024-06-27 19:52:06,445 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 342 selfloop transitions, 58 changer transitions 0/464 dead transitions. [2024-06-27 19:52:06,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 464 transitions, 5355 flow [2024-06-27 19:52:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:06,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:52:06,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-27 19:52:06,446 INFO L175 Difference]: Start difference. First operand has 329 places, 448 transitions, 4181 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:52:06,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 464 transitions, 5355 flow [2024-06-27 19:52:10,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 464 transitions, 5196 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-27 19:52:10,443 INFO L231 Difference]: Finished difference. Result has 330 places, 451 transitions, 4254 flow [2024-06-27 19:52:10,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4022, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4254, PETRI_PLACES=330, PETRI_TRANSITIONS=451} [2024-06-27 19:52:10,444 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-27 19:52:10,444 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 451 transitions, 4254 flow [2024-06-27 19:52:10,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:10,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:10,444 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 19:52:10,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:52:10,444 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:10,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1721299477, now seen corresponding path program 6 times [2024-06-27 19:52:10,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:10,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476940552] [2024-06-27 19:52:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:10,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:11,666 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 19:52:11,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:11,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476940552] [2024-06-27 19:52:11,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476940552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:11,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:11,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:11,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11147821] [2024-06-27 19:52:11,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:11,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:11,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:11,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:52:11,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 451 transitions, 4254 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:11,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:11,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:52:11,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:12,949 INFO L124 PetriNetUnfolderBase]: 3184/5131 cut-off events. [2024-06-27 19:52:12,949 INFO L125 PetriNetUnfolderBase]: For 1752227/1752250 co-relation queries the response was YES. [2024-06-27 19:52:13,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63432 conditions, 5131 events. 3184/5131 cut-off events. For 1752227/1752250 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30253 event pairs, 649 based on Foata normal form. 9/5095 useless extension candidates. Maximal degree in co-relation 63280. Up to 4432 conditions per place. [2024-06-27 19:52:13,035 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 364 selfloop transitions, 35 changer transitions 0/463 dead transitions. [2024-06-27 19:52:13,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 463 transitions, 5088 flow [2024-06-27 19:52:13,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:52:13,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 19:52:13,036 INFO L175 Difference]: Start difference. First operand has 330 places, 451 transitions, 4254 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:52:13,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 463 transitions, 5088 flow [2024-06-27 19:52:17,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 463 transitions, 4806 flow, removed 85 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:17,246 INFO L231 Difference]: Finished difference. Result has 332 places, 451 transitions, 4048 flow [2024-06-27 19:52:17,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4048, PETRI_PLACES=332, PETRI_TRANSITIONS=451} [2024-06-27 19:52:17,246 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 287 predicate places. [2024-06-27 19:52:17,247 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 451 transitions, 4048 flow [2024-06-27 19:52:17,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:17,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:17,247 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 19:52:17,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:52:17,247 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:17,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1847572769, now seen corresponding path program 4 times [2024-06-27 19:52:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:17,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165140331] [2024-06-27 19:52:17,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:17,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:18,440 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 19:52:18,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:18,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165140331] [2024-06-27 19:52:18,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165140331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:18,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:18,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:18,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861865165] [2024-06-27 19:52:18,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:18,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:18,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:18,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:18,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:18,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:52:18,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 451 transitions, 4048 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 19:52:18,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:18,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:52:18,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:19,690 INFO L124 PetriNetUnfolderBase]: 3008/4952 cut-off events. [2024-06-27 19:52:19,690 INFO L125 PetriNetUnfolderBase]: For 1762586/1762612 co-relation queries the response was YES. [2024-06-27 19:52:19,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61454 conditions, 4952 events. 3008/4952 cut-off events. For 1762586/1762612 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30025 event pairs, 643 based on Foata normal form. 11/4923 useless extension candidates. Maximal degree in co-relation 61301. Up to 3978 conditions per place. [2024-06-27 19:52:19,768 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 319 selfloop transitions, 40 changer transitions 0/476 dead transitions. [2024-06-27 19:52:19,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 476 transitions, 4941 flow [2024-06-27 19:52:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:19,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:52:19,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-27 19:52:19,770 INFO L175 Difference]: Start difference. First operand has 332 places, 451 transitions, 4048 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:52:19,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 476 transitions, 4941 flow [2024-06-27 19:52:24,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 476 transitions, 4861 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:52:24,928 INFO L231 Difference]: Finished difference. Result has 335 places, 463 transitions, 4232 flow [2024-06-27 19:52:24,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4232, PETRI_PLACES=335, PETRI_TRANSITIONS=463} [2024-06-27 19:52:24,929 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-27 19:52:24,930 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 463 transitions, 4232 flow [2024-06-27 19:52:24,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 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 19:52:24,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:24,930 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 19:52:24,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:52:24,930 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:24,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1831903199, now seen corresponding path program 4 times [2024-06-27 19:52:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:24,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848072409] [2024-06-27 19:52:24,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:24,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:26,013 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 19:52:26,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:26,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848072409] [2024-06-27 19:52:26,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848072409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:26,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:26,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:26,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598959692] [2024-06-27 19:52:26,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:26,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:26,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:26,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:52:26,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 463 transitions, 4232 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:26,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:26,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:52:26,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:27,255 INFO L124 PetriNetUnfolderBase]: 3186/5121 cut-off events. [2024-06-27 19:52:27,255 INFO L125 PetriNetUnfolderBase]: For 1784694/1784696 co-relation queries the response was YES. [2024-06-27 19:52:27,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63838 conditions, 5121 events. 3186/5121 cut-off events. For 1784694/1784696 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30009 event pairs, 655 based on Foata normal form. 3/5074 useless extension candidates. Maximal degree in co-relation 63682. Up to 4385 conditions per place. [2024-06-27 19:52:27,342 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 370 selfloop transitions, 44 changer transitions 0/478 dead transitions. [2024-06-27 19:52:27,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 478 transitions, 5204 flow [2024-06-27 19:52:27,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:27,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:27,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 19:52:27,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-27 19:52:27,343 INFO L175 Difference]: Start difference. First operand has 335 places, 463 transitions, 4232 flow. Second operand 8 states and 156 transitions. [2024-06-27 19:52:27,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 478 transitions, 5204 flow [2024-06-27 19:52:31,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 478 transitions, 5091 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-27 19:52:31,553 INFO L231 Difference]: Finished difference. Result has 340 places, 466 transitions, 4327 flow [2024-06-27 19:52:31,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4119, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4327, PETRI_PLACES=340, PETRI_TRANSITIONS=466} [2024-06-27 19:52:31,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-27 19:52:31,554 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 466 transitions, 4327 flow [2024-06-27 19:52:31,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:31,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:31,555 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 19:52:31,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:52:31,555 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:31,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:31,555 INFO L85 PathProgramCache]: Analyzing trace with hash -276513313, now seen corresponding path program 1 times [2024-06-27 19:52:31,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:31,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682500760] [2024-06-27 19:52:31,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:31,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:32,526 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 19:52:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682500760] [2024-06-27 19:52:32,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682500760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:32,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:32,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:32,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539110571] [2024-06-27 19:52:32,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:32,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:32,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:32,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:32,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:32,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:52:32,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 466 transitions, 4327 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:32,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:32,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:52:32,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:33,950 INFO L124 PetriNetUnfolderBase]: 3253/5246 cut-off events. [2024-06-27 19:52:33,951 INFO L125 PetriNetUnfolderBase]: For 1791741/1791741 co-relation queries the response was YES. [2024-06-27 19:52:34,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63971 conditions, 5246 events. 3253/5246 cut-off events. For 1791741/1791741 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30903 event pairs, 619 based on Foata normal form. 1/5245 useless extension candidates. Maximal degree in co-relation 63813. Up to 4497 conditions per place. [2024-06-27 19:52:34,033 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 403 selfloop transitions, 17 changer transitions 0/489 dead transitions. [2024-06-27 19:52:34,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 489 transitions, 5315 flow [2024-06-27 19:52:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:52:34,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 19:52:34,035 INFO L175 Difference]: Start difference. First operand has 340 places, 466 transitions, 4327 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:52:34,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 489 transitions, 5315 flow [2024-06-27 19:52:38,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 489 transitions, 5129 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:38,218 INFO L231 Difference]: Finished difference. Result has 342 places, 469 transitions, 4275 flow [2024-06-27 19:52:38,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4141, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4275, PETRI_PLACES=342, PETRI_TRANSITIONS=469} [2024-06-27 19:52:38,219 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-27 19:52:38,219 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 469 transitions, 4275 flow [2024-06-27 19:52:38,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:38,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:38,219 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 19:52:38,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:52:38,219 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:38,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:38,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1347442405, now seen corresponding path program 1 times [2024-06-27 19:52:38,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:38,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766684727] [2024-06-27 19:52:38,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:38,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:38,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:39,140 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 19:52:39,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:39,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766684727] [2024-06-27 19:52:39,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766684727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:39,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:39,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:39,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911530781] [2024-06-27 19:52:39,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:39,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:39,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:39,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:52:39,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 469 transitions, 4275 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:39,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:39,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:52:39,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:40,620 INFO L124 PetriNetUnfolderBase]: 3277/5282 cut-off events. [2024-06-27 19:52:40,620 INFO L125 PetriNetUnfolderBase]: For 1862028/1862033 co-relation queries the response was YES. [2024-06-27 19:52:40,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64681 conditions, 5282 events. 3277/5282 cut-off events. For 1862028/1862033 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 31152 event pairs, 618 based on Foata normal form. 6/5286 useless extension candidates. Maximal degree in co-relation 64522. Up to 4525 conditions per place. [2024-06-27 19:52:40,699 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 405 selfloop transitions, 18 changer transitions 0/492 dead transitions. [2024-06-27 19:52:40,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 492 transitions, 5257 flow [2024-06-27 19:52:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:52:40,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 19:52:40,700 INFO L175 Difference]: Start difference. First operand has 342 places, 469 transitions, 4275 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:52:40,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 492 transitions, 5257 flow [2024-06-27 19:52:44,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 492 transitions, 5145 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:44,982 INFO L231 Difference]: Finished difference. Result has 344 places, 473 transitions, 4288 flow [2024-06-27 19:52:44,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4163, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4288, PETRI_PLACES=344, PETRI_TRANSITIONS=473} [2024-06-27 19:52:44,983 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-27 19:52:44,983 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 473 transitions, 4288 flow [2024-06-27 19:52:44,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:44,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:44,983 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 19:52:44,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:52:44,983 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:44,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1611643177, now seen corresponding path program 2 times [2024-06-27 19:52:44,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:44,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966378706] [2024-06-27 19:52:44,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:44,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:45,988 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 19:52:45,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:45,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966378706] [2024-06-27 19:52:45,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966378706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:45,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:45,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:45,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677786327] [2024-06-27 19:52:45,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:45,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:45,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:45,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:45,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:46,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:52:46,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 473 transitions, 4288 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:46,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:46,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:52:46,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:47,304 INFO L124 PetriNetUnfolderBase]: 3324/5351 cut-off events. [2024-06-27 19:52:47,304 INFO L125 PetriNetUnfolderBase]: For 1907547/1907552 co-relation queries the response was YES. [2024-06-27 19:52:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66722 conditions, 5351 events. 3324/5351 cut-off events. For 1907547/1907552 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31584 event pairs, 621 based on Foata normal form. 8/5357 useless extension candidates. Maximal degree in co-relation 66562. Up to 4545 conditions per place. [2024-06-27 19:52:47,389 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 396 selfloop transitions, 34 changer transitions 0/499 dead transitions. [2024-06-27 19:52:47,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 499 transitions, 5601 flow [2024-06-27 19:52:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:52:47,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-27 19:52:47,391 INFO L175 Difference]: Start difference. First operand has 344 places, 473 transitions, 4288 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:52:47,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 499 transitions, 5601 flow [2024-06-27 19:52:51,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 499 transitions, 5506 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:51,295 INFO L231 Difference]: Finished difference. Result has 347 places, 480 transitions, 4434 flow [2024-06-27 19:52:51,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4434, PETRI_PLACES=347, PETRI_TRANSITIONS=480} [2024-06-27 19:52:51,296 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-27 19:52:51,296 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 480 transitions, 4434 flow [2024-06-27 19:52:51,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:51,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:51,296 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 19:52:51,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:52:51,297 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:51,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:51,297 INFO L85 PathProgramCache]: Analyzing trace with hash -271751527, now seen corresponding path program 3 times [2024-06-27 19:52:51,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:51,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377538966] [2024-06-27 19:52:51,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:51,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:52,365 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 19:52:52,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:52,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377538966] [2024-06-27 19:52:52,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377538966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:52,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:52,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:52,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080634535] [2024-06-27 19:52:52,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:52,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:52,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:52,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:52,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:52,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:52:52,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 480 transitions, 4434 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:52,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:52,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:52:52,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:53,763 INFO L124 PetriNetUnfolderBase]: 3306/5327 cut-off events. [2024-06-27 19:52:53,763 INFO L125 PetriNetUnfolderBase]: For 1924525/1924531 co-relation queries the response was YES. [2024-06-27 19:52:53,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66779 conditions, 5327 events. 3306/5327 cut-off events. For 1924525/1924531 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 31500 event pairs, 617 based on Foata normal form. 7/5332 useless extension candidates. Maximal degree in co-relation 66617. Up to 4557 conditions per place. [2024-06-27 19:52:53,854 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 405 selfloop transitions, 23 changer transitions 0/497 dead transitions. [2024-06-27 19:52:53,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 497 transitions, 5360 flow [2024-06-27 19:52:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:53,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:53,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:52:53,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 19:52:53,855 INFO L175 Difference]: Start difference. First operand has 347 places, 480 transitions, 4434 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:52:53,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 497 transitions, 5360 flow [2024-06-27 19:52:58,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 497 transitions, 5228 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 19:52:58,582 INFO L231 Difference]: Finished difference. Result has 351 places, 480 transitions, 4355 flow [2024-06-27 19:52:58,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4302, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4355, PETRI_PLACES=351, PETRI_TRANSITIONS=480} [2024-06-27 19:52:58,583 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 306 predicate places. [2024-06-27 19:52:58,583 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 480 transitions, 4355 flow [2024-06-27 19:52:58,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:58,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:58,583 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 19:52:58,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:52:58,584 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:58,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:58,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1847818537, now seen corresponding path program 4 times [2024-06-27 19:52:58,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:58,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32385477] [2024-06-27 19:52:58,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:58,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:59,763 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 19:52:59,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:59,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32385477] [2024-06-27 19:52:59,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32385477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:59,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:59,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:59,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250001611] [2024-06-27 19:52:59,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:59,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:59,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:59,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:52:59,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 480 transitions, 4355 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:52:59,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:59,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:52:59,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:01,231 INFO L124 PetriNetUnfolderBase]: 3322/5354 cut-off events. [2024-06-27 19:53:01,232 INFO L125 PetriNetUnfolderBase]: For 1938195/1938204 co-relation queries the response was YES. [2024-06-27 19:53:01,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67362 conditions, 5354 events. 3322/5354 cut-off events. For 1938195/1938204 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 31648 event pairs, 626 based on Foata normal form. 3/5354 useless extension candidates. Maximal degree in co-relation 67198. Up to 4530 conditions per place. [2024-06-27 19:53:01,324 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 389 selfloop transitions, 50 changer transitions 0/508 dead transitions. [2024-06-27 19:53:01,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 508 transitions, 5728 flow [2024-06-27 19:53:01,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 19:53:01,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-27 19:53:01,325 INFO L175 Difference]: Start difference. First operand has 351 places, 480 transitions, 4355 flow. Second operand 8 states and 159 transitions. [2024-06-27 19:53:01,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 508 transitions, 5728 flow [2024-06-27 19:53:06,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 508 transitions, 5642 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:06,233 INFO L231 Difference]: Finished difference. Result has 353 places, 495 transitions, 4630 flow [2024-06-27 19:53:06,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4286, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4630, PETRI_PLACES=353, PETRI_TRANSITIONS=495} [2024-06-27 19:53:06,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-27 19:53:06,234 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 495 transitions, 4630 flow [2024-06-27 19:53:06,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:53:06,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:06,234 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 19:53:06,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:53:06,235 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:06,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:06,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1728933661, now seen corresponding path program 5 times [2024-06-27 19:53:06,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:06,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386988893] [2024-06-27 19:53:06,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:06,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:07,528 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 19:53:07,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:07,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386988893] [2024-06-27 19:53:07,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386988893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:07,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:07,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076484798] [2024-06-27 19:53:07,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:07,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:07,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:07,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:53:07,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 495 transitions, 4630 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:53:07,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:07,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:53:07,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:08,847 INFO L124 PetriNetUnfolderBase]: 3321/5355 cut-off events. [2024-06-27 19:53:08,847 INFO L125 PetriNetUnfolderBase]: For 1983546/1983555 co-relation queries the response was YES. [2024-06-27 19:53:08,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68346 conditions, 5355 events. 3321/5355 cut-off events. For 1983546/1983555 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 31742 event pairs, 625 based on Foata normal form. 6/5357 useless extension candidates. Maximal degree in co-relation 68180. Up to 4568 conditions per place. [2024-06-27 19:53:08,936 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 413 selfloop transitions, 33 changer transitions 0/515 dead transitions. [2024-06-27 19:53:08,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 515 transitions, 5747 flow [2024-06-27 19:53:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:08,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:53:08,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 19:53:08,938 INFO L175 Difference]: Start difference. First operand has 353 places, 495 transitions, 4630 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:53:08,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 515 transitions, 5747 flow [2024-06-27 19:53:13,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 515 transitions, 5650 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 19:53:13,538 INFO L231 Difference]: Finished difference. Result has 357 places, 501 transitions, 4775 flow [2024-06-27 19:53:13,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4537, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4775, PETRI_PLACES=357, PETRI_TRANSITIONS=501} [2024-06-27 19:53:13,539 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-27 19:53:13,539 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 501 transitions, 4775 flow [2024-06-27 19:53:13,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:53:13,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:13,540 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 19:53:13,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:53:13,542 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:13,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:13,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1170304375, now seen corresponding path program 6 times [2024-06-27 19:53:13,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:13,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130464402] [2024-06-27 19:53:13,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:14,824 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 19:53:14,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130464402] [2024-06-27 19:53:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130464402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:14,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:14,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313248425] [2024-06-27 19:53:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:14,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:14,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:14,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:14,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:14,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:53:14,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 501 transitions, 4775 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:53:14,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:14,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:53:14,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:16,297 INFO L124 PetriNetUnfolderBase]: 3322/5356 cut-off events. [2024-06-27 19:53:16,297 INFO L125 PetriNetUnfolderBase]: For 1974135/1974144 co-relation queries the response was YES. [2024-06-27 19:53:16,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68987 conditions, 5356 events. 3322/5356 cut-off events. For 1974135/1974144 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 31643 event pairs, 624 based on Foata normal form. 2/5355 useless extension candidates. Maximal degree in co-relation 68819. Up to 4556 conditions per place. [2024-06-27 19:53:16,388 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 409 selfloop transitions, 42 changer transitions 0/520 dead transitions. [2024-06-27 19:53:16,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 520 transitions, 5849 flow [2024-06-27 19:53:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:16,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:16,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 19:53:16,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-27 19:53:16,390 INFO L175 Difference]: Start difference. First operand has 357 places, 501 transitions, 4775 flow. Second operand 8 states and 161 transitions. [2024-06-27 19:53:16,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 520 transitions, 5849 flow [2024-06-27 19:53:20,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 520 transitions, 5631 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-27 19:53:20,268 INFO L231 Difference]: Finished difference. Result has 359 places, 504 transitions, 4734 flow [2024-06-27 19:53:20,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4557, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4734, PETRI_PLACES=359, PETRI_TRANSITIONS=504} [2024-06-27 19:53:20,269 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-27 19:53:20,269 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 504 transitions, 4734 flow [2024-06-27 19:53:20,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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 19:53:20,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:20,270 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 19:53:20,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:53:20,270 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:20,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:20,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1848126367, now seen corresponding path program 1 times [2024-06-27 19:53:20,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:20,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660617336] [2024-06-27 19:53:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:20,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:21,898 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 19:53:21,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:21,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660617336] [2024-06-27 19:53:21,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660617336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:21,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:21,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:53:21,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686743131] [2024-06-27 19:53:21,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:21,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:53:21,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:21,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:53:21,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:53:22,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-27 19:53:22,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 504 transitions, 4734 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 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 19:53:22,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:22,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-27 19:53:22,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:23,334 INFO L124 PetriNetUnfolderBase]: 3098/5079 cut-off events. [2024-06-27 19:53:23,335 INFO L125 PetriNetUnfolderBase]: For 1984734/1984742 co-relation queries the response was YES. [2024-06-27 19:53:23,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67679 conditions, 5079 events. 3098/5079 cut-off events. For 1984734/1984742 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 30723 event pairs, 635 based on Foata normal form. 4/5036 useless extension candidates. Maximal degree in co-relation 67510. Up to 4151 conditions per place. [2024-06-27 19:53:23,565 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 383 selfloop transitions, 19 changer transitions 0/519 dead transitions. [2024-06-27 19:53:23,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 519 transitions, 5670 flow [2024-06-27 19:53:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:53:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:53:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 19:53:23,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 19:53:23,566 INFO L175 Difference]: Start difference. First operand has 359 places, 504 transitions, 4734 flow. Second operand 9 states and 174 transitions. [2024-06-27 19:53:23,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 519 transitions, 5670 flow [2024-06-27 19:53:27,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 519 transitions, 5507 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-27 19:53:27,863 INFO L231 Difference]: Finished difference. Result has 362 places, 506 transitions, 4716 flow [2024-06-27 19:53:27,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4571, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4716, PETRI_PLACES=362, PETRI_TRANSITIONS=506} [2024-06-27 19:53:27,864 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-27 19:53:27,864 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 506 transitions, 4716 flow [2024-06-27 19:53:27,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 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 19:53:27,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:27,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:27,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:53:27,865 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:27,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1120623247, now seen corresponding path program 1 times [2024-06-27 19:53:27,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:27,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397408488] [2024-06-27 19:53:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:27,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:29,040 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 19:53:29,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:29,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397408488] [2024-06-27 19:53:29,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397408488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:29,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:29,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:29,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50988515] [2024-06-27 19:53:29,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:29,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:29,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:29,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:29,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:29,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:53:29,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 506 transitions, 4716 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:53:29,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:29,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:53:29,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:31,212 INFO L124 PetriNetUnfolderBase]: 3862/6017 cut-off events. [2024-06-27 19:53:31,212 INFO L125 PetriNetUnfolderBase]: For 2252342/2252346 co-relation queries the response was YES. [2024-06-27 19:53:31,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77808 conditions, 6017 events. 3862/6017 cut-off events. For 2252342/2252346 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34414 event pairs, 558 based on Foata normal form. 20/6035 useless extension candidates. Maximal degree in co-relation 77638. Up to 5277 conditions per place. [2024-06-27 19:53:31,326 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 532 selfloop transitions, 36 changer transitions 0/573 dead transitions. [2024-06-27 19:53:31,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 573 transitions, 6750 flow [2024-06-27 19:53:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:53:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:53:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 240 transitions. [2024-06-27 19:53:31,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:53:31,328 INFO L175 Difference]: Start difference. First operand has 362 places, 506 transitions, 4716 flow. Second operand 12 states and 240 transitions. [2024-06-27 19:53:31,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 573 transitions, 6750 flow [2024-06-27 19:53:37,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 573 transitions, 6619 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 19:53:37,494 INFO L231 Difference]: Finished difference. Result has 368 places, 508 transitions, 4821 flow [2024-06-27 19:53:37,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4821, PETRI_PLACES=368, PETRI_TRANSITIONS=508} [2024-06-27 19:53:37,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 323 predicate places. [2024-06-27 19:53:37,495 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 508 transitions, 4821 flow [2024-06-27 19:53:37,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:53:37,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:37,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:37,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:53:37,495 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:37,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1711180209, now seen corresponding path program 2 times [2024-06-27 19:53:37,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:37,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483889827] [2024-06-27 19:53:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:37,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:38,670 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 19:53:38,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483889827] [2024-06-27 19:53:38,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483889827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:38,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:38,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:38,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973020625] [2024-06-27 19:53:38,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:38,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:38,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:38,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:38,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:38,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:53:38,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 508 transitions, 4821 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:53:38,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:38,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:53:38,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:40,786 INFO L124 PetriNetUnfolderBase]: 3912/6114 cut-off events. [2024-06-27 19:53:40,786 INFO L125 PetriNetUnfolderBase]: For 2280361/2280365 co-relation queries the response was YES. [2024-06-27 19:53:40,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78642 conditions, 6114 events. 3912/6114 cut-off events. For 2280361/2280365 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35183 event pairs, 725 based on Foata normal form. 24/6136 useless extension candidates. Maximal degree in co-relation 78471. Up to 5582 conditions per place. [2024-06-27 19:53:40,879 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 527 selfloop transitions, 31 changer transitions 0/563 dead transitions. [2024-06-27 19:53:40,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 563 transitions, 6267 flow [2024-06-27 19:53:40,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:40,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:40,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-27 19:53:40,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4462809917355372 [2024-06-27 19:53:40,881 INFO L175 Difference]: Start difference. First operand has 368 places, 508 transitions, 4821 flow. Second operand 11 states and 216 transitions. [2024-06-27 19:53:40,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 563 transitions, 6267 flow [2024-06-27 19:53:46,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 563 transitions, 6146 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 19:53:46,247 INFO L231 Difference]: Finished difference. Result has 371 places, 509 transitions, 4851 flow [2024-06-27 19:53:46,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4851, PETRI_PLACES=371, PETRI_TRANSITIONS=509} [2024-06-27 19:53:46,272 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 326 predicate places. [2024-06-27 19:53:46,272 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 509 transitions, 4851 flow [2024-06-27 19:53:46,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:53:46,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:46,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:46,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:53:46,273 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:46,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:46,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1032057487, now seen corresponding path program 3 times [2024-06-27 19:53:46,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:46,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945026013] [2024-06-27 19:53:46,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:46,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:47,433 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 19:53:47,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945026013] [2024-06-27 19:53:47,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945026013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:47,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:47,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045810131] [2024-06-27 19:53:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:47,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:47,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:47,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:47,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:53:47,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 509 transitions, 4851 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:53:47,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:47,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:53:47,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:49,758 INFO L124 PetriNetUnfolderBase]: 3884/6070 cut-off events. [2024-06-27 19:53:49,758 INFO L125 PetriNetUnfolderBase]: For 2205381/2205385 co-relation queries the response was YES. [2024-06-27 19:53:49,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76191 conditions, 6070 events. 3884/6070 cut-off events. For 2205381/2205385 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34864 event pairs, 685 based on Foata normal form. 20/6088 useless extension candidates. Maximal degree in co-relation 76018. Up to 5428 conditions per place. [2024-06-27 19:53:49,863 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 529 selfloop transitions, 33 changer transitions 0/567 dead transitions. [2024-06-27 19:53:49,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 567 transitions, 6279 flow [2024-06-27 19:53:49,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:49,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 19:53:49,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:53:49,865 INFO L175 Difference]: Start difference. First operand has 371 places, 509 transitions, 4851 flow. Second operand 11 states and 220 transitions. [2024-06-27 19:53:49,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 567 transitions, 6279 flow [2024-06-27 19:53:55,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 567 transitions, 6124 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-27 19:53:55,163 INFO L231 Difference]: Finished difference. Result has 373 places, 509 transitions, 4768 flow [2024-06-27 19:53:55,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4696, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4768, PETRI_PLACES=373, PETRI_TRANSITIONS=509} [2024-06-27 19:53:55,164 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 328 predicate places. [2024-06-27 19:53:55,164 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 509 transitions, 4768 flow [2024-06-27 19:53:55,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:53:55,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:55,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:55,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:53:55,165 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:53:55,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1747488263, now seen corresponding path program 4 times [2024-06-27 19:53:55,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:55,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212358788] [2024-06-27 19:53:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:55,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:55,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:56,351 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 19:53:56,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:56,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212358788] [2024-06-27 19:53:56,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212358788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:56,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:56,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:53:56,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064686714] [2024-06-27 19:53:56,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:56,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:53:56,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:56,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:53:56,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:53:56,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:53:56,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 509 transitions, 4768 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:53:56,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:56,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:53:56,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:58,587 INFO L124 PetriNetUnfolderBase]: 3959/6195 cut-off events. [2024-06-27 19:53:58,588 INFO L125 PetriNetUnfolderBase]: For 2263029/2263036 co-relation queries the response was YES. [2024-06-27 19:53:58,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77015 conditions, 6195 events. 3959/6195 cut-off events. For 2263029/2263036 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 35887 event pairs, 675 based on Foata normal form. 24/6216 useless extension candidates. Maximal degree in co-relation 76841. Up to 4677 conditions per place. [2024-06-27 19:53:58,696 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 361 selfloop transitions, 196 changer transitions 0/562 dead transitions. [2024-06-27 19:53:58,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 562 transitions, 6236 flow [2024-06-27 19:53:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:53:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:53:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 19:53:58,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-27 19:53:58,698 INFO L175 Difference]: Start difference. First operand has 373 places, 509 transitions, 4768 flow. Second operand 11 states and 229 transitions. [2024-06-27 19:53:58,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 562 transitions, 6236 flow [2024-06-27 19:54:03,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 562 transitions, 6151 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-27 19:54:03,917 INFO L231 Difference]: Finished difference. Result has 374 places, 510 transitions, 5164 flow [2024-06-27 19:54:03,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4683, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5164, PETRI_PLACES=374, PETRI_TRANSITIONS=510} [2024-06-27 19:54:03,918 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 329 predicate places. [2024-06-27 19:54:03,918 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 510 transitions, 5164 flow [2024-06-27 19:54:03,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:54:03,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:03,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:03,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:54:03,919 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:03,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1752850643, now seen corresponding path program 5 times [2024-06-27 19:54:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:03,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822798571] [2024-06-27 19:54:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:05,082 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 19:54:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:05,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822798571] [2024-06-27 19:54:05,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822798571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:05,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:05,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301611863] [2024-06-27 19:54:05,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:05,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:05,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:05,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:05,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:05,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:05,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 510 transitions, 5164 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:54:05,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:05,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:05,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:07,316 INFO L124 PetriNetUnfolderBase]: 4034/6340 cut-off events. [2024-06-27 19:54:07,316 INFO L125 PetriNetUnfolderBase]: For 2313755/2313762 co-relation queries the response was YES. [2024-06-27 19:54:07,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79322 conditions, 6340 events. 4034/6340 cut-off events. For 2313755/2313762 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 37129 event pairs, 709 based on Foata normal form. 24/6361 useless extension candidates. Maximal degree in co-relation 79147. Up to 4802 conditions per place. [2024-06-27 19:54:07,414 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 364 selfloop transitions, 195 changer transitions 0/564 dead transitions. [2024-06-27 19:54:07,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 564 transitions, 6658 flow [2024-06-27 19:54:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:54:07,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:54:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-27 19:54:07,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:54:07,416 INFO L175 Difference]: Start difference. First operand has 374 places, 510 transitions, 5164 flow. Second operand 11 states and 231 transitions. [2024-06-27 19:54:07,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 564 transitions, 6658 flow [2024-06-27 19:54:13,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 564 transitions, 6209 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-27 19:54:13,212 INFO L231 Difference]: Finished difference. Result has 376 places, 511 transitions, 5196 flow [2024-06-27 19:54:13,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5196, PETRI_PLACES=376, PETRI_TRANSITIONS=511} [2024-06-27 19:54:13,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-27 19:54:13,213 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 511 transitions, 5196 flow [2024-06-27 19:54:13,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:54:13,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:13,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:13,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:54:13,214 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:13,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1752998513, now seen corresponding path program 6 times [2024-06-27 19:54:13,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041948074] [2024-06-27 19:54:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:13,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:14,237 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 19:54:14,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:14,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041948074] [2024-06-27 19:54:14,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041948074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:14,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:14,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:14,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146565771] [2024-06-27 19:54:14,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:14,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:14,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:14,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 511 transitions, 5196 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:54:14,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:14,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:16,423 INFO L124 PetriNetUnfolderBase]: 4092/6438 cut-off events. [2024-06-27 19:54:16,424 INFO L125 PetriNetUnfolderBase]: For 2324255/2324262 co-relation queries the response was YES. [2024-06-27 19:54:16,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80150 conditions, 6438 events. 4092/6438 cut-off events. For 2324255/2324262 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 37903 event pairs, 695 based on Foata normal form. 20/6455 useless extension candidates. Maximal degree in co-relation 79974. Up to 4670 conditions per place. [2024-06-27 19:54:16,534 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 365 selfloop transitions, 198 changer transitions 0/568 dead transitions. [2024-06-27 19:54:16,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 568 transitions, 6734 flow [2024-06-27 19:54:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:54:16,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:54:16,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-27 19:54:16,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48140495867768596 [2024-06-27 19:54:16,535 INFO L175 Difference]: Start difference. First operand has 376 places, 511 transitions, 5196 flow. Second operand 11 states and 233 transitions. [2024-06-27 19:54:16,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 568 transitions, 6734 flow [2024-06-27 19:54:22,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 568 transitions, 6285 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-27 19:54:22,342 INFO L231 Difference]: Finished difference. Result has 378 places, 512 transitions, 5235 flow [2024-06-27 19:54:22,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5235, PETRI_PLACES=378, PETRI_TRANSITIONS=512} [2024-06-27 19:54:22,342 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-27 19:54:22,342 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 512 transitions, 5235 flow [2024-06-27 19:54:22,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:54:22,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:22,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:22,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:54:22,343 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:22,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1747272782, now seen corresponding path program 1 times [2024-06-27 19:54:22,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:22,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852024618] [2024-06-27 19:54:22,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:22,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:23,475 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 19:54:23,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:23,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852024618] [2024-06-27 19:54:23,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852024618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:23,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:23,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:23,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40420751] [2024-06-27 19:54:23,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:23,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:23,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:23,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:23,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 512 transitions, 5235 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:54:23,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:23,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:23,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:25,644 INFO L124 PetriNetUnfolderBase]: 4109/6470 cut-off events. [2024-06-27 19:54:25,644 INFO L125 PetriNetUnfolderBase]: For 2279902/2279909 co-relation queries the response was YES. [2024-06-27 19:54:25,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80151 conditions, 6470 events. 4109/6470 cut-off events. For 2279902/2279909 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 38222 event pairs, 720 based on Foata normal form. 8/6475 useless extension candidates. Maximal degree in co-relation 79974. Up to 5409 conditions per place. [2024-06-27 19:54:25,759 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 404 selfloop transitions, 154 changer transitions 0/563 dead transitions. [2024-06-27 19:54:25,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 563 transitions, 6642 flow [2024-06-27 19:54:25,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:54:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:54:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 19:54:25,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-27 19:54:25,760 INFO L175 Difference]: Start difference. First operand has 378 places, 512 transitions, 5235 flow. Second operand 11 states and 221 transitions. [2024-06-27 19:54:25,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 563 transitions, 6642 flow [2024-06-27 19:54:31,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 563 transitions, 6174 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 19:54:31,744 INFO L231 Difference]: Finished difference. Result has 381 places, 517 transitions, 5221 flow [2024-06-27 19:54:31,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4771, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5221, PETRI_PLACES=381, PETRI_TRANSITIONS=517} [2024-06-27 19:54:31,759 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-27 19:54:31,759 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 517 transitions, 5221 flow [2024-06-27 19:54:31,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:54:31,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:31,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:31,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:54:31,760 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:31,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:31,761 INFO L85 PathProgramCache]: Analyzing trace with hash 213926754, now seen corresponding path program 1 times [2024-06-27 19:54:31,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:31,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191690410] [2024-06-27 19:54:31,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:31,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:32,869 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 19:54:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191690410] [2024-06-27 19:54:32,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191690410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:32,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:32,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:32,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122847989] [2024-06-27 19:54:32,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:32,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:32,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:33,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:54:33,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 517 transitions, 5221 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:54:33,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:33,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:54:33,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:34,645 INFO L124 PetriNetUnfolderBase]: 3713/5989 cut-off events. [2024-06-27 19:54:34,645 INFO L125 PetriNetUnfolderBase]: For 2282533/2282549 co-relation queries the response was YES. [2024-06-27 19:54:34,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77214 conditions, 5989 events. 3713/5989 cut-off events. For 2282533/2282549 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 36393 event pairs, 686 based on Foata normal form. 8/5916 useless extension candidates. Maximal degree in co-relation 77035. Up to 5206 conditions per place. [2024-06-27 19:54:34,752 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 456 selfloop transitions, 29 changer transitions 0/551 dead transitions. [2024-06-27 19:54:34,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 551 transitions, 6387 flow [2024-06-27 19:54:34,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:34,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:34,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 19:54:34,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-27 19:54:34,753 INFO L175 Difference]: Start difference. First operand has 381 places, 517 transitions, 5221 flow. Second operand 9 states and 184 transitions. [2024-06-27 19:54:34,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 551 transitions, 6387 flow [2024-06-27 19:54:39,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 551 transitions, 5978 flow, removed 53 selfloop flow, removed 8 redundant places. [2024-06-27 19:54:39,924 INFO L231 Difference]: Finished difference. Result has 382 places, 520 transitions, 4976 flow [2024-06-27 19:54:39,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4976, PETRI_PLACES=382, PETRI_TRANSITIONS=520} [2024-06-27 19:54:39,935 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-27 19:54:39,935 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 520 transitions, 4976 flow [2024-06-27 19:54:39,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:54:39,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:39,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:39,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:54:39,936 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:39,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1180149213, now seen corresponding path program 1 times [2024-06-27 19:54:39,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:39,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140706057] [2024-06-27 19:54:39,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:39,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:40,739 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 19:54:40,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:40,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140706057] [2024-06-27 19:54:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140706057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:40,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:40,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855796087] [2024-06-27 19:54:40,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:40,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:40,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:40,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:40,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:40,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 520 transitions, 4976 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:54:40,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:40,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:40,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:42,574 INFO L124 PetriNetUnfolderBase]: 4124/6475 cut-off events. [2024-06-27 19:54:42,574 INFO L125 PetriNetUnfolderBase]: For 2315446/2315453 co-relation queries the response was YES. [2024-06-27 19:54:42,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80279 conditions, 6475 events. 4124/6475 cut-off events. For 2315446/2315453 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38004 event pairs, 739 based on Foata normal form. 7/6479 useless extension candidates. Maximal degree in co-relation 80099. Up to 6015 conditions per place. [2024-06-27 19:54:42,686 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 484 selfloop transitions, 61 changer transitions 0/550 dead transitions. [2024-06-27 19:54:42,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 550 transitions, 6278 flow [2024-06-27 19:54:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:42,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:42,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:54:42,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 19:54:42,688 INFO L175 Difference]: Start difference. First operand has 382 places, 520 transitions, 4976 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:54:42,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 550 transitions, 6278 flow [2024-06-27 19:54:48,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 550 transitions, 6136 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:48,701 INFO L231 Difference]: Finished difference. Result has 383 places, 523 transitions, 5092 flow [2024-06-27 19:54:48,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5092, PETRI_PLACES=383, PETRI_TRANSITIONS=523} [2024-06-27 19:54:48,702 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-27 19:54:48,702 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 523 transitions, 5092 flow [2024-06-27 19:54:48,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:54:48,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:48,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:48,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:54:48,703 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:48,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:48,703 INFO L85 PathProgramCache]: Analyzing trace with hash 362917601, now seen corresponding path program 2 times [2024-06-27 19:54:48,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:48,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100110308] [2024-06-27 19:54:48,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:48,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:49,659 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 19:54:49,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100110308] [2024-06-27 19:54:49,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100110308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:49,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:49,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:49,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038010938] [2024-06-27 19:54:49,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:49,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:49,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:49,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:49,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:49,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:49,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 523 transitions, 5092 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:54:49,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:49,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:49,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:51,432 INFO L124 PetriNetUnfolderBase]: 4137/6494 cut-off events. [2024-06-27 19:54:51,432 INFO L125 PetriNetUnfolderBase]: For 2359158/2359165 co-relation queries the response was YES. [2024-06-27 19:54:51,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81270 conditions, 6494 events. 4137/6494 cut-off events. For 2359158/2359165 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 38172 event pairs, 729 based on Foata normal form. 7/6498 useless extension candidates. Maximal degree in co-relation 81089. Up to 6009 conditions per place. [2024-06-27 19:54:51,552 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 480 selfloop transitions, 68 changer transitions 0/553 dead transitions. [2024-06-27 19:54:51,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 553 transitions, 6794 flow [2024-06-27 19:54:51,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:51,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:51,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 19:54:51,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-27 19:54:51,553 INFO L175 Difference]: Start difference. First operand has 383 places, 523 transitions, 5092 flow. Second operand 8 states and 153 transitions. [2024-06-27 19:54:51,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 553 transitions, 6794 flow [2024-06-27 19:54:57,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 553 transitions, 6562 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:57,616 INFO L231 Difference]: Finished difference. Result has 385 places, 529 transitions, 5264 flow [2024-06-27 19:54:57,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4860, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5264, PETRI_PLACES=385, PETRI_TRANSITIONS=529} [2024-06-27 19:54:57,617 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 340 predicate places. [2024-06-27 19:54:57,617 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 529 transitions, 5264 flow [2024-06-27 19:54:57,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:54:57,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:57,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:57,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:54:57,617 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:54:57,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:57,618 INFO L85 PathProgramCache]: Analyzing trace with hash -713702995, now seen corresponding path program 7 times [2024-06-27 19:54:57,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:57,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583032219] [2024-06-27 19:54:57,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:57,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:58,630 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 19:54:58,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:58,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583032219] [2024-06-27 19:54:58,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583032219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:58,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:58,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:54:58,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265784303] [2024-06-27 19:54:58,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:58,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:54:58,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:58,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:54:58,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:54:58,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:54:58,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 529 transitions, 5264 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:54:58,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:58,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:54:58,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:01,029 INFO L124 PetriNetUnfolderBase]: 4212/6620 cut-off events. [2024-06-27 19:55:01,029 INFO L125 PetriNetUnfolderBase]: For 2540948/2540955 co-relation queries the response was YES. [2024-06-27 19:55:01,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83213 conditions, 6620 events. 4212/6620 cut-off events. For 2540948/2540955 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 39142 event pairs, 703 based on Foata normal form. 24/6641 useless extension candidates. Maximal degree in co-relation 83031. Up to 5091 conditions per place. [2024-06-27 19:55:01,143 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 399 selfloop transitions, 178 changer transitions 0/582 dead transitions. [2024-06-27 19:55:01,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 582 transitions, 6812 flow [2024-06-27 19:55:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:01,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:01,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-27 19:55:01,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690082644628099 [2024-06-27 19:55:01,145 INFO L175 Difference]: Start difference. First operand has 385 places, 529 transitions, 5264 flow. Second operand 11 states and 227 transitions. [2024-06-27 19:55:01,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 582 transitions, 6812 flow [2024-06-27 19:55:07,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 582 transitions, 6603 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:07,380 INFO L231 Difference]: Finished difference. Result has 392 places, 530 transitions, 5508 flow [2024-06-27 19:55:07,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5508, PETRI_PLACES=392, PETRI_TRANSITIONS=530} [2024-06-27 19:55:07,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-27 19:55:07,381 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 530 transitions, 5508 flow [2024-06-27 19:55:07,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:07,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:07,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:07,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:55:07,382 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:07,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:07,383 INFO L85 PathProgramCache]: Analyzing trace with hash -913004785, now seen corresponding path program 8 times [2024-06-27 19:55:07,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:07,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407778433] [2024-06-27 19:55:07,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:08,528 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 19:55:08,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:08,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407778433] [2024-06-27 19:55:08,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407778433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:08,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:08,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:55:08,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566923324] [2024-06-27 19:55:08,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:08,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:55:08,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:55:08,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:55:08,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:08,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 530 transitions, 5508 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:08,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:08,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:08,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:10,958 INFO L124 PetriNetUnfolderBase]: 4287/6745 cut-off events. [2024-06-27 19:55:10,959 INFO L125 PetriNetUnfolderBase]: For 2598671/2598678 co-relation queries the response was YES. [2024-06-27 19:55:11,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85617 conditions, 6745 events. 4287/6745 cut-off events. For 2598671/2598678 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 40176 event pairs, 708 based on Foata normal form. 24/6766 useless extension candidates. Maximal degree in co-relation 85433. Up to 5216 conditions per place. [2024-06-27 19:55:11,094 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 403 selfloop transitions, 176 changer transitions 0/584 dead transitions. [2024-06-27 19:55:11,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 584 transitions, 7084 flow [2024-06-27 19:55:11,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:11,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 19:55:11,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-27 19:55:11,096 INFO L175 Difference]: Start difference. First operand has 392 places, 530 transitions, 5508 flow. Second operand 11 states and 229 transitions. [2024-06-27 19:55:11,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 584 transitions, 7084 flow [2024-06-27 19:55:19,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 584 transitions, 6663 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:19,575 INFO L231 Difference]: Finished difference. Result has 394 places, 531 transitions, 5538 flow [2024-06-27 19:55:19,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5087, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5538, PETRI_PLACES=394, PETRI_TRANSITIONS=531} [2024-06-27 19:55:19,575 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-27 19:55:19,576 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 531 transitions, 5538 flow [2024-06-27 19:55:19,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:19,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:19,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:19,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:55:19,576 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:19,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash -907642405, now seen corresponding path program 9 times [2024-06-27 19:55:19,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:19,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921331904] [2024-06-27 19:55:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:19,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:20,602 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 19:55:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:20,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921331904] [2024-06-27 19:55:20,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921331904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:20,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:20,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:55:20,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887525507] [2024-06-27 19:55:20,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:20,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:55:20,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:55:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:55:20,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:20,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 531 transitions, 5538 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:20,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:20,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:20,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:23,108 INFO L124 PetriNetUnfolderBase]: 4362/6880 cut-off events. [2024-06-27 19:55:23,108 INFO L125 PetriNetUnfolderBase]: For 2639251/2639258 co-relation queries the response was YES. [2024-06-27 19:55:23,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86790 conditions, 6880 events. 4362/6880 cut-off events. For 2639251/2639258 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 41303 event pairs, 732 based on Foata normal form. 24/6901 useless extension candidates. Maximal degree in co-relation 86605. Up to 5341 conditions per place. [2024-06-27 19:55:23,226 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 405 selfloop transitions, 175 changer transitions 0/585 dead transitions. [2024-06-27 19:55:23,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 585 transitions, 7118 flow [2024-06-27 19:55:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-27 19:55:23,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47520661157024796 [2024-06-27 19:55:23,228 INFO L175 Difference]: Start difference. First operand has 394 places, 531 transitions, 5538 flow. Second operand 11 states and 230 transitions. [2024-06-27 19:55:23,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 585 transitions, 7118 flow [2024-06-27 19:55:30,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 585 transitions, 6699 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:30,995 INFO L231 Difference]: Finished difference. Result has 396 places, 532 transitions, 5570 flow [2024-06-27 19:55:31,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5570, PETRI_PLACES=396, PETRI_TRANSITIONS=532} [2024-06-27 19:55:31,000 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-27 19:55:31,000 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 532 transitions, 5570 flow [2024-06-27 19:55:31,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:31,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:31,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:31,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:55:31,001 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:31,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:31,001 INFO L85 PathProgramCache]: Analyzing trace with hash -913152655, now seen corresponding path program 10 times [2024-06-27 19:55:31,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:31,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268099873] [2024-06-27 19:55:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:31,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:31,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:32,096 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 19:55:32,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:32,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268099873] [2024-06-27 19:55:32,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268099873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:32,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:32,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:55:32,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878884559] [2024-06-27 19:55:32,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:32,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:55:32,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:32,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:55:32,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:55:32,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:32,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 532 transitions, 5570 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:32,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:32,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:32,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:34,485 INFO L124 PetriNetUnfolderBase]: 4420/6983 cut-off events. [2024-06-27 19:55:34,486 INFO L125 PetriNetUnfolderBase]: For 2648522/2648529 co-relation queries the response was YES. [2024-06-27 19:55:34,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87609 conditions, 6983 events. 4420/6983 cut-off events. For 2648522/2648529 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42172 event pairs, 718 based on Foata normal form. 20/7000 useless extension candidates. Maximal degree in co-relation 87423. Up to 5089 conditions per place. [2024-06-27 19:55:34,619 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 404 selfloop transitions, 180 changer transitions 0/589 dead transitions. [2024-06-27 19:55:34,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 589 transitions, 7194 flow [2024-06-27 19:55:34,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:34,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-27 19:55:34,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:55:34,621 INFO L175 Difference]: Start difference. First operand has 396 places, 532 transitions, 5570 flow. Second operand 11 states and 231 transitions. [2024-06-27 19:55:34,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 589 transitions, 7194 flow [2024-06-27 19:55:43,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 589 transitions, 6775 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:43,011 INFO L231 Difference]: Finished difference. Result has 398 places, 533 transitions, 5613 flow [2024-06-27 19:55:43,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5151, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5613, PETRI_PLACES=398, PETRI_TRANSITIONS=533} [2024-06-27 19:55:43,011 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-27 19:55:43,012 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 533 transitions, 5613 flow [2024-06-27 19:55:43,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:43,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:43,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:43,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:55:43,012 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:43,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:43,013 INFO L85 PathProgramCache]: Analyzing trace with hash -907426924, now seen corresponding path program 2 times [2024-06-27 19:55:43,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:43,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386091295] [2024-06-27 19:55:43,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:43,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:43,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:44,067 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 19:55:44,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:44,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386091295] [2024-06-27 19:55:44,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386091295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:44,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:44,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:55:44,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935493294] [2024-06-27 19:55:44,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:44,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:55:44,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:44,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:55:44,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:55:44,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:44,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 533 transitions, 5613 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:44,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:44,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:44,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:46,568 INFO L124 PetriNetUnfolderBase]: 4437/7010 cut-off events. [2024-06-27 19:55:46,568 INFO L125 PetriNetUnfolderBase]: For 2589202/2589209 co-relation queries the response was YES. [2024-06-27 19:55:46,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87566 conditions, 7010 events. 4437/7010 cut-off events. For 2589202/2589209 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 42374 event pairs, 771 based on Foata normal form. 8/7015 useless extension candidates. Maximal degree in co-relation 87379. Up to 5948 conditions per place. [2024-06-27 19:55:46,696 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 444 selfloop transitions, 135 changer transitions 0/584 dead transitions. [2024-06-27 19:55:46,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 584 transitions, 7100 flow [2024-06-27 19:55:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:46,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:46,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-27 19:55:46,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45661157024793386 [2024-06-27 19:55:46,697 INFO L175 Difference]: Start difference. First operand has 398 places, 533 transitions, 5613 flow. Second operand 11 states and 221 transitions. [2024-06-27 19:55:46,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 584 transitions, 7100 flow [2024-06-27 19:55:54,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 584 transitions, 6658 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-27 19:55:54,628 INFO L231 Difference]: Finished difference. Result has 401 places, 538 transitions, 5601 flow [2024-06-27 19:55:54,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5175, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5601, PETRI_PLACES=401, PETRI_TRANSITIONS=538} [2024-06-27 19:55:54,628 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 356 predicate places. [2024-06-27 19:55:54,628 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 538 transitions, 5601 flow [2024-06-27 19:55:54,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:54,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:54,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:54,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:55:54,629 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:54,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:54,629 INFO L85 PathProgramCache]: Analyzing trace with hash -713487514, now seen corresponding path program 3 times [2024-06-27 19:55:54,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:54,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396527165] [2024-06-27 19:55:54,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:54,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:55,828 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 19:55:55,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:55,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396527165] [2024-06-27 19:55:55,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396527165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:55,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:55,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:55:55,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053329746] [2024-06-27 19:55:55,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:55,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:55:55,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:55,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:55:55,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:55:55,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:55:55,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 538 transitions, 5601 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:55:55,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:55,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:55:55,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:58,207 INFO L124 PetriNetUnfolderBase]: 4465/7063 cut-off events. [2024-06-27 19:55:58,208 INFO L125 PetriNetUnfolderBase]: For 2616873/2616880 co-relation queries the response was YES. [2024-06-27 19:55:58,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87824 conditions, 7063 events. 4465/7063 cut-off events. For 2616873/2616880 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 42863 event pairs, 781 based on Foata normal form. 8/7068 useless extension candidates. Maximal degree in co-relation 87635. Up to 5987 conditions per place. [2024-06-27 19:55:58,337 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 445 selfloop transitions, 139 changer transitions 0/589 dead transitions. [2024-06-27 19:55:58,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 589 transitions, 7092 flow [2024-06-27 19:55:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:55:58,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:55:58,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 19:55:58,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:55:58,339 INFO L175 Difference]: Start difference. First operand has 401 places, 538 transitions, 5601 flow. Second operand 11 states and 220 transitions. [2024-06-27 19:55:58,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 589 transitions, 7092 flow [2024-06-27 19:56:05,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 589 transitions, 6701 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:05,373 INFO L231 Difference]: Finished difference. Result has 405 places, 544 transitions, 5664 flow [2024-06-27 19:56:05,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5216, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5664, PETRI_PLACES=405, PETRI_TRANSITIONS=544} [2024-06-27 19:56:05,374 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 360 predicate places. [2024-06-27 19:56:05,374 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 544 transitions, 5664 flow [2024-06-27 19:56:05,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:56:05,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:05,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:05,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:56:05,374 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:05,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:05,375 INFO L85 PathProgramCache]: Analyzing trace with hash -706337674, now seen corresponding path program 4 times [2024-06-27 19:56:05,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:05,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522724133] [2024-06-27 19:56:05,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:05,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:06,612 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 19:56:06,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:06,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522724133] [2024-06-27 19:56:06,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522724133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:06,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:06,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:56:06,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317672854] [2024-06-27 19:56:06,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:06,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:56:06,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:56:06,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:56:06,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:56:06,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 544 transitions, 5664 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:56:06,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:06,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:56:06,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:09,560 INFO L124 PetriNetUnfolderBase]: 4482/7090 cut-off events. [2024-06-27 19:56:09,561 INFO L125 PetriNetUnfolderBase]: For 2657365/2657372 co-relation queries the response was YES. [2024-06-27 19:56:09,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88685 conditions, 7090 events. 4482/7090 cut-off events. For 2657365/2657372 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43089 event pairs, 786 based on Foata normal form. 8/7095 useless extension candidates. Maximal degree in co-relation 88494. Up to 6014 conditions per place. [2024-06-27 19:56:09,701 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 445 selfloop transitions, 143 changer transitions 0/593 dead transitions. [2024-06-27 19:56:09,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 593 transitions, 7139 flow [2024-06-27 19:56:09,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:56:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:56:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-27 19:56:09,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-27 19:56:09,703 INFO L175 Difference]: Start difference. First operand has 405 places, 544 transitions, 5664 flow. Second operand 11 states and 219 transitions. [2024-06-27 19:56:09,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 593 transitions, 7139 flow [2024-06-27 19:56:16,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 593 transitions, 6736 flow, removed 63 selfloop flow, removed 8 redundant places. [2024-06-27 19:56:16,835 INFO L231 Difference]: Finished difference. Result has 408 places, 548 transitions, 5689 flow [2024-06-27 19:56:16,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5265, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5689, PETRI_PLACES=408, PETRI_TRANSITIONS=548} [2024-06-27 19:56:16,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-27 19:56:16,835 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 548 transitions, 5689 flow [2024-06-27 19:56:16,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:56:16,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:16,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:56:16,836 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:16,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:16,836 INFO L85 PathProgramCache]: Analyzing trace with hash -706068904, now seen corresponding path program 5 times [2024-06-27 19:56:16,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:16,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621823327] [2024-06-27 19:56:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:16,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:17,911 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 19:56:17,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:17,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621823327] [2024-06-27 19:56:17,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621823327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:17,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:17,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:56:17,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839969376] [2024-06-27 19:56:17,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:17,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:56:17,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:17,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:56:17,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:56:18,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:56:18,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 548 transitions, 5689 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:56:18,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:18,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:56:18,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:20,116 INFO L124 PetriNetUnfolderBase]: 4499/7122 cut-off events. [2024-06-27 19:56:20,116 INFO L125 PetriNetUnfolderBase]: For 2697697/2697704 co-relation queries the response was YES. [2024-06-27 19:56:20,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89179 conditions, 7122 events. 4499/7122 cut-off events. For 2697697/2697704 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 43438 event pairs, 782 based on Foata normal form. 8/7127 useless extension candidates. Maximal degree in co-relation 88987. Up to 5946 conditions per place. [2024-06-27 19:56:20,245 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 439 selfloop transitions, 152 changer transitions 0/596 dead transitions. [2024-06-27 19:56:20,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 596 transitions, 7157 flow [2024-06-27 19:56:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:56:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:56:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-27 19:56:20,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:56:20,247 INFO L175 Difference]: Start difference. First operand has 408 places, 548 transitions, 5689 flow. Second operand 11 states and 220 transitions. [2024-06-27 19:56:20,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 596 transitions, 7157 flow [2024-06-27 19:56:28,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 596 transitions, 6786 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:28,250 INFO L231 Difference]: Finished difference. Result has 412 places, 550 transitions, 5749 flow [2024-06-27 19:56:28,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5318, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5749, PETRI_PLACES=412, PETRI_TRANSITIONS=550} [2024-06-27 19:56:28,251 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-27 19:56:28,251 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 550 transitions, 5749 flow [2024-06-27 19:56:28,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:56:28,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:28,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:28,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:56:28,252 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:28,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:28,253 INFO L85 PathProgramCache]: Analyzing trace with hash 480188350, now seen corresponding path program 2 times [2024-06-27 19:56:28,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:28,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756448291] [2024-06-27 19:56:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:28,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:29,395 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 19:56:29,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:29,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756448291] [2024-06-27 19:56:29,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756448291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:29,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:29,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:29,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30170639] [2024-06-27 19:56:29,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:29,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:29,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:29,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:29,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:29,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:56:29,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 550 transitions, 5749 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:56:29,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:29,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:56:29,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:31,309 INFO L124 PetriNetUnfolderBase]: 4104/6676 cut-off events. [2024-06-27 19:56:31,309 INFO L125 PetriNetUnfolderBase]: For 2750777/2750799 co-relation queries the response was YES. [2024-06-27 19:56:31,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87112 conditions, 6676 events. 4104/6676 cut-off events. For 2750777/2750799 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 42185 event pairs, 756 based on Foata normal form. 10/6605 useless extension candidates. Maximal degree in co-relation 86919. Up to 5786 conditions per place. [2024-06-27 19:56:31,431 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 467 selfloop transitions, 40 changer transitions 0/583 dead transitions. [2024-06-27 19:56:31,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 583 transitions, 7343 flow [2024-06-27 19:56:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-27 19:56:31,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-27 19:56:31,433 INFO L175 Difference]: Start difference. First operand has 412 places, 550 transitions, 5749 flow. Second operand 9 states and 182 transitions. [2024-06-27 19:56:31,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 583 transitions, 7343 flow [2024-06-27 19:56:40,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 583 transitions, 6930 flow, removed 56 selfloop flow, removed 9 redundant places. [2024-06-27 19:56:40,548 INFO L231 Difference]: Finished difference. Result has 412 places, 556 transitions, 5628 flow [2024-06-27 19:56:40,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5628, PETRI_PLACES=412, PETRI_TRANSITIONS=556} [2024-06-27 19:56:40,548 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-27 19:56:40,548 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 556 transitions, 5628 flow [2024-06-27 19:56:40,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:56:40,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:40,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:40,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:56:40,549 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:40,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:40,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1186824381, now seen corresponding path program 1 times [2024-06-27 19:56:40,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:40,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429281585] [2024-06-27 19:56:40,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:40,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:42,198 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 19:56:42,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:42,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429281585] [2024-06-27 19:56:42,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429281585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:42,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512777809] [2024-06-27 19:56:42,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:42,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:42,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:42,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:42,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:56:42,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 556 transitions, 5628 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:56:42,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:42,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:56:42,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:44,139 INFO L124 PetriNetUnfolderBase]: 4113/6687 cut-off events. [2024-06-27 19:56:44,139 INFO L125 PetriNetUnfolderBase]: For 2778205/2778227 co-relation queries the response was YES. [2024-06-27 19:56:44,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87178 conditions, 6687 events. 4113/6687 cut-off events. For 2778205/2778227 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 42336 event pairs, 751 based on Foata normal form. 5/6611 useless extension candidates. Maximal degree in co-relation 86984. Up to 5844 conditions per place. [2024-06-27 19:56:44,458 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 481 selfloop transitions, 27 changer transitions 0/584 dead transitions. [2024-06-27 19:56:44,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 584 transitions, 6842 flow [2024-06-27 19:56:44,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-27 19:56:44,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-27 19:56:44,460 INFO L175 Difference]: Start difference. First operand has 412 places, 556 transitions, 5628 flow. Second operand 9 states and 178 transitions. [2024-06-27 19:56:44,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 584 transitions, 6842 flow [2024-06-27 19:56:51,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 584 transitions, 6701 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:51,314 INFO L231 Difference]: Finished difference. Result has 416 places, 559 transitions, 5669 flow [2024-06-27 19:56:51,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5669, PETRI_PLACES=416, PETRI_TRANSITIONS=559} [2024-06-27 19:56:51,314 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-27 19:56:51,314 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 559 transitions, 5669 flow [2024-06-27 19:56:51,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:56:51,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:51,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:51,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:56:51,315 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:51,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:51,316 INFO L85 PathProgramCache]: Analyzing trace with hash 362913044, now seen corresponding path program 3 times [2024-06-27 19:56:51,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:51,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169121223] [2024-06-27 19:56:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:51,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:52,411 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 19:56:52,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:52,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169121223] [2024-06-27 19:56:52,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169121223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:52,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:52,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:56:52,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11705013] [2024-06-27 19:56:52,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:52,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:56:52,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:52,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:56:52,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:56:52,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-27 19:56:52,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 559 transitions, 5669 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:56:52,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:52,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-27 19:56:52,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:54,366 INFO L124 PetriNetUnfolderBase]: 4109/6680 cut-off events. [2024-06-27 19:56:54,367 INFO L125 PetriNetUnfolderBase]: For 2798718/2798740 co-relation queries the response was YES. [2024-06-27 19:56:54,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87335 conditions, 6680 events. 4109/6680 cut-off events. For 2798718/2798740 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 42219 event pairs, 750 based on Foata normal form. 9/6609 useless extension candidates. Maximal degree in co-relation 87139. Up to 5806 conditions per place. [2024-06-27 19:56:54,487 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 477 selfloop transitions, 32 changer transitions 0/585 dead transitions. [2024-06-27 19:56:54,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 585 transitions, 6773 flow [2024-06-27 19:56:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:56:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:56:54,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-27 19:56:54,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:56:54,489 INFO L175 Difference]: Start difference. First operand has 416 places, 559 transitions, 5669 flow. Second operand 9 states and 180 transitions. [2024-06-27 19:56:54,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 585 transitions, 6773 flow [2024-06-27 19:57:00,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 585 transitions, 6543 flow, removed 90 selfloop flow, removed 7 redundant places. [2024-06-27 19:57:00,690 INFO L231 Difference]: Finished difference. Result has 418 places, 559 transitions, 5509 flow [2024-06-27 19:57:00,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5439, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5509, PETRI_PLACES=418, PETRI_TRANSITIONS=559} [2024-06-27 19:57:00,691 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-27 19:57:00,691 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 559 transitions, 5509 flow [2024-06-27 19:57:00,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 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 19:57:00,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:00,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:00,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:57:00,691 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:00,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:00,692 INFO L85 PathProgramCache]: Analyzing trace with hash 391092839, now seen corresponding path program 1 times [2024-06-27 19:57:00,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:00,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701769566] [2024-06-27 19:57:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:00,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:01,556 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 19:57:01,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:01,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701769566] [2024-06-27 19:57:01,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701769566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:01,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:01,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:01,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233038463] [2024-06-27 19:57:01,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:01,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:01,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:01,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:57:01,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 559 transitions, 5509 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:57:01,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:01,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:57:01,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:03,547 INFO L124 PetriNetUnfolderBase]: 4378/7019 cut-off events. [2024-06-27 19:57:03,547 INFO L125 PetriNetUnfolderBase]: For 2815253/2815260 co-relation queries the response was YES. [2024-06-27 19:57:03,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89210 conditions, 7019 events. 4378/7019 cut-off events. For 2815253/2815260 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 43591 event pairs, 802 based on Foata normal form. 6/7015 useless extension candidates. Maximal degree in co-relation 89013. Up to 6236 conditions per place. [2024-06-27 19:57:03,677 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 490 selfloop transitions, 36 changer transitions 0/588 dead transitions. [2024-06-27 19:57:03,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 588 transitions, 6787 flow [2024-06-27 19:57:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:03,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:57:03,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:57:03,678 INFO L175 Difference]: Start difference. First operand has 418 places, 559 transitions, 5509 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:57:03,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 588 transitions, 6787 flow [2024-06-27 19:57:12,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 588 transitions, 6701 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:12,939 INFO L231 Difference]: Finished difference. Result has 418 places, 562 transitions, 5623 flow [2024-06-27 19:57:12,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5623, PETRI_PLACES=418, PETRI_TRANSITIONS=562} [2024-06-27 19:57:12,940 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-27 19:57:12,940 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 562 transitions, 5623 flow [2024-06-27 19:57:12,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:57:12,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:12,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:12,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:57:12,940 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:12,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash 485506927, now seen corresponding path program 3 times [2024-06-27 19:57:12,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:12,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644493167] [2024-06-27 19:57:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:12,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:13,790 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 19:57:13,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:13,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644493167] [2024-06-27 19:57:13,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644493167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:13,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:13,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:13,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211664733] [2024-06-27 19:57:13,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:13,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:13,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:13,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:13,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:57:13,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 562 transitions, 5623 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:57:13,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:13,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:57:13,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:15,809 INFO L124 PetriNetUnfolderBase]: 4539/7187 cut-off events. [2024-06-27 19:57:15,810 INFO L125 PetriNetUnfolderBase]: For 2848047/2848050 co-relation queries the response was YES. [2024-06-27 19:57:15,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91448 conditions, 7187 events. 4539/7187 cut-off events. For 2848047/2848050 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43878 event pairs, 805 based on Foata normal form. 3/7187 useless extension candidates. Maximal degree in co-relation 91250. Up to 6686 conditions per place. [2024-06-27 19:57:15,937 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 526 selfloop transitions, 58 changer transitions 0/589 dead transitions. [2024-06-27 19:57:15,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 589 transitions, 6981 flow [2024-06-27 19:57:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:57:15,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 19:57:15,939 INFO L175 Difference]: Start difference. First operand has 418 places, 562 transitions, 5623 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:57:15,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 589 transitions, 6981 flow [2024-06-27 19:57:23,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 589 transitions, 6829 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 19:57:23,184 INFO L231 Difference]: Finished difference. Result has 421 places, 565 transitions, 5713 flow [2024-06-27 19:57:23,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5713, PETRI_PLACES=421, PETRI_TRANSITIONS=565} [2024-06-27 19:57:23,184 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 376 predicate places. [2024-06-27 19:57:23,185 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 565 transitions, 5713 flow [2024-06-27 19:57:23,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:57:23,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:23,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:23,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:57:23,185 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:23,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 590544576, now seen corresponding path program 1 times [2024-06-27 19:57:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:23,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576992753] [2024-06-27 19:57:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:23,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:23,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:24,223 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 19:57:24,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:24,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576992753] [2024-06-27 19:57:24,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576992753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:24,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:24,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:24,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236586718] [2024-06-27 19:57:24,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:24,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:24,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:24,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:57:24,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 565 transitions, 5713 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:57:24,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:24,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:57:24,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:26,285 INFO L124 PetriNetUnfolderBase]: 4388/7033 cut-off events. [2024-06-27 19:57:26,285 INFO L125 PetriNetUnfolderBase]: For 2879994/2880001 co-relation queries the response was YES. [2024-06-27 19:57:26,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90277 conditions, 7033 events. 4388/7033 cut-off events. For 2879994/2880001 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43717 event pairs, 811 based on Foata normal form. 7/7030 useless extension candidates. Maximal degree in co-relation 90078. Up to 6290 conditions per place. [2024-06-27 19:57:26,406 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 497 selfloop transitions, 30 changer transitions 0/590 dead transitions. [2024-06-27 19:57:26,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 590 transitions, 6949 flow [2024-06-27 19:57:26,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:26,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:57:26,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 19:57:26,407 INFO L175 Difference]: Start difference. First operand has 421 places, 565 transitions, 5713 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:57:26,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 590 transitions, 6949 flow [2024-06-27 19:57:33,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 590 transitions, 6739 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:33,947 INFO L231 Difference]: Finished difference. Result has 423 places, 568 transitions, 5683 flow [2024-06-27 19:57:33,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5503, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5683, PETRI_PLACES=423, PETRI_TRANSITIONS=568} [2024-06-27 19:57:33,947 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-27 19:57:33,948 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 568 transitions, 5683 flow [2024-06-27 19:57:33,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:57:33,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:33,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:33,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:57:33,948 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:33,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash 529129309, now seen corresponding path program 2 times [2024-06-27 19:57:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:33,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412210385] [2024-06-27 19:57:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:34,823 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 19:57:34,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:34,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412210385] [2024-06-27 19:57:34,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412210385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:34,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:34,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:34,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895359486] [2024-06-27 19:57:34,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:34,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:34,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:34,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:34,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:34,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:57:34,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 568 transitions, 5683 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:57:34,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:34,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:57:34,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:36,832 INFO L124 PetriNetUnfolderBase]: 4398/7049 cut-off events. [2024-06-27 19:57:36,833 INFO L125 PetriNetUnfolderBase]: For 2926270/2926277 co-relation queries the response was YES. [2024-06-27 19:57:36,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90941 conditions, 7049 events. 4398/7049 cut-off events. For 2926270/2926277 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 43782 event pairs, 801 based on Foata normal form. 6/7045 useless extension candidates. Maximal degree in co-relation 90741. Up to 6251 conditions per place. [2024-06-27 19:57:36,964 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 492 selfloop transitions, 40 changer transitions 0/595 dead transitions. [2024-06-27 19:57:36,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 595 transitions, 6997 flow [2024-06-27 19:57:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:57:36,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-27 19:57:36,966 INFO L175 Difference]: Start difference. First operand has 423 places, 568 transitions, 5683 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:57:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 595 transitions, 6997 flow [2024-06-27 19:57:45,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 595 transitions, 6839 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:45,064 INFO L231 Difference]: Finished difference. Result has 425 places, 571 transitions, 5741 flow [2024-06-27 19:57:45,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5741, PETRI_PLACES=425, PETRI_TRANSITIONS=571} [2024-06-27 19:57:45,065 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-27 19:57:45,065 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 571 transitions, 5741 flow [2024-06-27 19:57:45,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:57:45,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:45,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:45,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:57:45,066 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:45,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1518127055, now seen corresponding path program 4 times [2024-06-27 19:57:45,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:45,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69477173] [2024-06-27 19:57:45,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:45,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:45,872 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 19:57:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:45,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69477173] [2024-06-27 19:57:45,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69477173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:45,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:45,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:45,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267502918] [2024-06-27 19:57:45,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:45,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:45,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:45,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:57:45,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 571 transitions, 5741 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:57:45,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:45,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:57:45,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:47,893 INFO L124 PetriNetUnfolderBase]: 4559/7217 cut-off events. [2024-06-27 19:57:47,894 INFO L125 PetriNetUnfolderBase]: For 2960523/2960526 co-relation queries the response was YES. [2024-06-27 19:57:47,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93165 conditions, 7217 events. 4559/7217 cut-off events. For 2960523/2960526 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 44073 event pairs, 818 based on Foata normal form. 3/7217 useless extension candidates. Maximal degree in co-relation 92964. Up to 6699 conditions per place. [2024-06-27 19:57:48,030 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 524 selfloop transitions, 65 changer transitions 0/594 dead transitions. [2024-06-27 19:57:48,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 594 transitions, 7123 flow [2024-06-27 19:57:48,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:48,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:57:48,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 19:57:48,031 INFO L175 Difference]: Start difference. First operand has 425 places, 571 transitions, 5741 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:57:48,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 594 transitions, 7123 flow [2024-06-27 19:57:56,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 594 transitions, 6937 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-27 19:57:56,678 INFO L231 Difference]: Finished difference. Result has 427 places, 574 transitions, 5839 flow [2024-06-27 19:57:56,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5839, PETRI_PLACES=427, PETRI_TRANSITIONS=574} [2024-06-27 19:57:56,678 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 382 predicate places. [2024-06-27 19:57:56,679 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 574 transitions, 5839 flow [2024-06-27 19:57:56,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:57:56,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:56,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:56,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:57:56,679 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:56,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:56,680 INFO L85 PathProgramCache]: Analyzing trace with hash 735782501, now seen corresponding path program 5 times [2024-06-27 19:57:56,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:56,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676830338] [2024-06-27 19:57:56,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:56,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:57,655 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 19:57:57,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:57,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676830338] [2024-06-27 19:57:57,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676830338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:57,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:57,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:57,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390171708] [2024-06-27 19:57:57,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:57,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:57,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:57,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:57,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:57,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:57:57,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 574 transitions, 5839 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:57:57,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:57,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:57:57,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:59,938 INFO L124 PetriNetUnfolderBase]: 4580/7249 cut-off events. [2024-06-27 19:57:59,938 INFO L125 PetriNetUnfolderBase]: For 3023755/3023758 co-relation queries the response was YES. [2024-06-27 19:58:00,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94550 conditions, 7249 events. 4580/7249 cut-off events. For 3023755/3023758 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44318 event pairs, 818 based on Foata normal form. 3/7249 useless extension candidates. Maximal degree in co-relation 94348. Up to 6683 conditions per place. [2024-06-27 19:58:00,062 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 507 selfloop transitions, 89 changer transitions 0/601 dead transitions. [2024-06-27 19:58:00,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 601 transitions, 8141 flow [2024-06-27 19:58:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:58:00,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 19:58:00,077 INFO L175 Difference]: Start difference. First operand has 427 places, 574 transitions, 5839 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:58:00,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 601 transitions, 8141 flow [2024-06-27 19:58:07,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 601 transitions, 7879 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:07,679 INFO L231 Difference]: Finished difference. Result has 429 places, 583 transitions, 6211 flow [2024-06-27 19:58:07,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6211, PETRI_PLACES=429, PETRI_TRANSITIONS=583} [2024-06-27 19:58:07,679 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 384 predicate places. [2024-06-27 19:58:07,679 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 583 transitions, 6211 flow [2024-06-27 19:58:07,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:58:07,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:07,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:07,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:58:07,680 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:07,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash 597896226, now seen corresponding path program 2 times [2024-06-27 19:58:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:07,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144867767] [2024-06-27 19:58:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:07,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:08,759 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 19:58:08,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:08,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144867767] [2024-06-27 19:58:08,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144867767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:08,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:08,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:08,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814770477] [2024-06-27 19:58:08,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:08,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:08,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:08,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:08,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:58:08,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 583 transitions, 6211 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:58:08,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:08,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:58:08,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:10,812 INFO L124 PetriNetUnfolderBase]: 4429/7093 cut-off events. [2024-06-27 19:58:10,813 INFO L125 PetriNetUnfolderBase]: For 3058392/3058399 co-relation queries the response was YES. [2024-06-27 19:58:10,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93631 conditions, 7093 events. 4429/7093 cut-off events. For 3058392/3058399 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 44066 event pairs, 801 based on Foata normal form. 7/7090 useless extension candidates. Maximal degree in co-relation 93428. Up to 6324 conditions per place. [2024-06-27 19:58:10,957 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 499 selfloop transitions, 38 changer transitions 0/604 dead transitions. [2024-06-27 19:58:10,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 604 transitions, 7463 flow [2024-06-27 19:58:10,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:10,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:58:10,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-27 19:58:10,958 INFO L175 Difference]: Start difference. First operand has 429 places, 583 transitions, 6211 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:58:10,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 604 transitions, 7463 flow [2024-06-27 19:58:21,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 604 transitions, 7220 flow, removed 95 selfloop flow, removed 3 redundant places. [2024-06-27 19:58:21,448 INFO L231 Difference]: Finished difference. Result has 434 places, 586 transitions, 6176 flow [2024-06-27 19:58:21,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6176, PETRI_PLACES=434, PETRI_TRANSITIONS=586} [2024-06-27 19:58:21,449 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 389 predicate places. [2024-06-27 19:58:21,449 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 586 transitions, 6176 flow [2024-06-27 19:58:21,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:58:21,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:21,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:21,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:58:21,450 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:21,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:21,450 INFO L85 PathProgramCache]: Analyzing trace with hash 597896009, now seen corresponding path program 3 times [2024-06-27 19:58:21,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:21,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777778643] [2024-06-27 19:58:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:21,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:22,352 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 19:58:22,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777778643] [2024-06-27 19:58:22,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777778643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:22,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:22,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:22,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568463923] [2024-06-27 19:58:22,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:22,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:22,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:22,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:22,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:58:22,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 586 transitions, 6176 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:58:22,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:22,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:58:22,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:24,477 INFO L124 PetriNetUnfolderBase]: 4455/7133 cut-off events. [2024-06-27 19:58:24,477 INFO L125 PetriNetUnfolderBase]: For 3127420/3127427 co-relation queries the response was YES. [2024-06-27 19:58:24,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94844 conditions, 7133 events. 4455/7133 cut-off events. For 3127420/3127427 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 44409 event pairs, 820 based on Foata normal form. 6/7129 useless extension candidates. Maximal degree in co-relation 94639. Up to 6288 conditions per place. [2024-06-27 19:58:24,615 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 494 selfloop transitions, 52 changer transitions 0/613 dead transitions. [2024-06-27 19:58:24,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 613 transitions, 7960 flow [2024-06-27 19:58:24,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:24,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:58:24,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-27 19:58:24,616 INFO L175 Difference]: Start difference. First operand has 434 places, 586 transitions, 6176 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:58:24,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 613 transitions, 7960 flow [2024-06-27 19:58:32,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 613 transitions, 7776 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-27 19:58:32,163 INFO L231 Difference]: Finished difference. Result has 436 places, 592 transitions, 6376 flow [2024-06-27 19:58:32,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5992, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6376, PETRI_PLACES=436, PETRI_TRANSITIONS=592} [2024-06-27 19:58:32,164 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-27 19:58:32,164 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 592 transitions, 6376 flow [2024-06-27 19:58:32,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:58:32,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:32,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:32,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:58:32,165 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:32,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:32,165 INFO L85 PathProgramCache]: Analyzing trace with hash 597716271, now seen corresponding path program 6 times [2024-06-27 19:58:32,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:32,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140682215] [2024-06-27 19:58:32,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:32,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:32,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:33,177 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 19:58:33,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:33,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140682215] [2024-06-27 19:58:33,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140682215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:33,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:33,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:33,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221216750] [2024-06-27 19:58:33,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:33,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:33,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:33,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:33,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:33,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:58:33,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 592 transitions, 6376 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:58:33,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:33,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:58:33,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:35,343 INFO L124 PetriNetUnfolderBase]: 4608/7292 cut-off events. [2024-06-27 19:58:35,343 INFO L125 PetriNetUnfolderBase]: For 3153630/3153633 co-relation queries the response was YES. [2024-06-27 19:58:35,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96752 conditions, 7292 events. 4608/7292 cut-off events. For 3153630/3153633 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 44616 event pairs, 833 based on Foata normal form. 3/7292 useless extension candidates. Maximal degree in co-relation 96546. Up to 6723 conditions per place. [2024-06-27 19:58:35,478 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 515 selfloop transitions, 90 changer transitions 0/610 dead transitions. [2024-06-27 19:58:35,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 610 transitions, 8264 flow [2024-06-27 19:58:35,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:35,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:58:35,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-27 19:58:35,480 INFO L175 Difference]: Start difference. First operand has 436 places, 592 transitions, 6376 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:58:35,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 610 transitions, 8264 flow [2024-06-27 19:58:46,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 610 transitions, 7984 flow, removed 121 selfloop flow, removed 4 redundant places. [2024-06-27 19:58:46,604 INFO L231 Difference]: Finished difference. Result has 440 places, 592 transitions, 6282 flow [2024-06-27 19:58:46,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6096, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6282, PETRI_PLACES=440, PETRI_TRANSITIONS=592} [2024-06-27 19:58:46,604 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-27 19:58:46,604 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 592 transitions, 6282 flow [2024-06-27 19:58:46,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 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 19:58:46,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:46,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:46,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:58:46,605 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:46,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:46,605 INFO L85 PathProgramCache]: Analyzing trace with hash 598163136, now seen corresponding path program 3 times [2024-06-27 19:58:46,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:46,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548330515] [2024-06-27 19:58:46,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:46,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:47,619 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 19:58:47,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:47,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548330515] [2024-06-27 19:58:47,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548330515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:47,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:47,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:47,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127459103] [2024-06-27 19:58:47,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:47,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:47,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:47,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:47,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:47,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-27 19:58:47,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 592 transitions, 6282 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:58:47,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:47,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-27 19:58:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:50,037 INFO L124 PetriNetUnfolderBase]: 4465/7147 cut-off events. [2024-06-27 19:58:50,037 INFO L125 PetriNetUnfolderBase]: For 3195800/3195807 co-relation queries the response was YES. [2024-06-27 19:58:50,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95886 conditions, 7147 events. 4465/7147 cut-off events. For 3195800/3195807 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 44450 event pairs, 816 based on Foata normal form. 7/7144 useless extension candidates. Maximal degree in co-relation 95678. Up to 6362 conditions per place. [2024-06-27 19:58:50,169 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 501 selfloop transitions, 49 changer transitions 0/617 dead transitions. [2024-06-27 19:58:50,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 617 transitions, 8010 flow [2024-06-27 19:58:50,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:58:50,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 19:58:50,170 INFO L175 Difference]: Start difference. First operand has 440 places, 592 transitions, 6282 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:58:50,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 617 transitions, 8010 flow [2024-06-27 19:58:59,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 617 transitions, 7769 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:59,626 INFO L231 Difference]: Finished difference. Result has 441 places, 598 transitions, 6403 flow [2024-06-27 19:58:59,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6041, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6403, PETRI_PLACES=441, PETRI_TRANSITIONS=598} [2024-06-27 19:58:59,627 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 396 predicate places. [2024-06-27 19:58:59,627 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 598 transitions, 6403 flow [2024-06-27 19:58:59,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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 19:58:59,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:59,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:59,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:58:59,628 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:59,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1566164079, now seen corresponding path program 11 times [2024-06-27 19:58:59,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:59,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850707128] [2024-06-27 19:58:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:59,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:00,653 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 19:59:00,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:00,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850707128] [2024-06-27 19:59:00,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850707128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:00,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:00,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:00,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067741415] [2024-06-27 19:59:00,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:00,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:00,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:00,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:00,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:00,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:59:00,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 598 transitions, 6403 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:59:00,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:00,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:59:00,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:03,451 INFO L124 PetriNetUnfolderBase]: 4696/7412 cut-off events. [2024-06-27 19:59:03,451 INFO L125 PetriNetUnfolderBase]: For 3430210/3430213 co-relation queries the response was YES. [2024-06-27 19:59:03,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99357 conditions, 7412 events. 4696/7412 cut-off events. For 3430210/3430213 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 45388 event pairs, 745 based on Foata normal form. 20/7429 useless extension candidates. Maximal degree in co-relation 99149. Up to 5849 conditions per place. [2024-06-27 19:59:03,585 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 468 selfloop transitions, 176 changer transitions 0/649 dead transitions. [2024-06-27 19:59:03,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 649 transitions, 8143 flow [2024-06-27 19:59:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:59:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:59:03,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-27 19:59:03,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4690082644628099 [2024-06-27 19:59:03,587 INFO L175 Difference]: Start difference. First operand has 441 places, 598 transitions, 6403 flow. Second operand 11 states and 227 transitions. [2024-06-27 19:59:03,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 649 transitions, 8143 flow [2024-06-27 19:59:13,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 649 transitions, 7952 flow, removed 74 selfloop flow, removed 4 redundant places. [2024-06-27 19:59:13,018 INFO L231 Difference]: Finished difference. Result has 448 places, 599 transitions, 6677 flow [2024-06-27 19:59:13,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6677, PETRI_PLACES=448, PETRI_TRANSITIONS=599} [2024-06-27 19:59:13,018 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 403 predicate places. [2024-06-27 19:59:13,018 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 599 transitions, 6677 flow [2024-06-27 19:59:13,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:59:13,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:13,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:13,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:59:13,019 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:13,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:13,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1151723979, now seen corresponding path program 12 times [2024-06-27 19:59:13,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:13,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974168266] [2024-06-27 19:59:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:13,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:14,147 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 19:59:14,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:14,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974168266] [2024-06-27 19:59:14,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974168266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:14,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:14,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:14,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667678762] [2024-06-27 19:59:14,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:14,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:14,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:14,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:14,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:14,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:59:14,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 599 transitions, 6677 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:59:14,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:14,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:59:14,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:17,347 INFO L124 PetriNetUnfolderBase]: 4771/7542 cut-off events. [2024-06-27 19:59:17,347 INFO L125 PetriNetUnfolderBase]: For 3500841/3500844 co-relation queries the response was YES. [2024-06-27 19:59:17,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101991 conditions, 7542 events. 4771/7542 cut-off events. For 3500841/3500844 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 46395 event pairs, 774 based on Foata normal form. 20/7559 useless extension candidates. Maximal degree in co-relation 101781. Up to 5974 conditions per place. [2024-06-27 19:59:17,491 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 475 selfloop transitions, 171 changer transitions 0/651 dead transitions. [2024-06-27 19:59:17,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 651 transitions, 8449 flow [2024-06-27 19:59:17,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:59:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:59:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-27 19:59:17,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4731404958677686 [2024-06-27 19:59:17,493 INFO L175 Difference]: Start difference. First operand has 448 places, 599 transitions, 6677 flow. Second operand 11 states and 229 transitions. [2024-06-27 19:59:17,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 651 transitions, 8449 flow [2024-06-27 19:59:29,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 651 transitions, 8016 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-27 19:59:29,873 INFO L231 Difference]: Finished difference. Result has 450 places, 600 transitions, 6701 flow [2024-06-27 19:59:29,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6701, PETRI_PLACES=450, PETRI_TRANSITIONS=600} [2024-06-27 19:59:29,874 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 405 predicate places. [2024-06-27 19:59:29,874 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 600 transitions, 6701 flow [2024-06-27 19:59:29,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:59:29,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:29,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:29,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:59:29,875 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:29,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:29,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1132472903, now seen corresponding path program 13 times [2024-06-27 19:59:29,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:29,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247901580] [2024-06-27 19:59:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:29,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:30,990 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 19:59:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:30,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247901580] [2024-06-27 19:59:30,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247901580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:30,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:30,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:30,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441328656] [2024-06-27 19:59:30,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:30,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:30,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:30,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:30,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:31,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:59:31,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 600 transitions, 6701 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:59:31,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:31,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:59:31,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:34,403 INFO L124 PetriNetUnfolderBase]: 4940/7821 cut-off events. [2024-06-27 19:59:34,404 INFO L125 PetriNetUnfolderBase]: For 3714928/3714931 co-relation queries the response was YES. [2024-06-27 19:59:34,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107948 conditions, 7821 events. 4940/7821 cut-off events. For 3714928/3714931 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 48598 event pairs, 783 based on Foata normal form. 16/7834 useless extension candidates. Maximal degree in co-relation 107737. Up to 5842 conditions per place. [2024-06-27 19:59:34,562 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 472 selfloop transitions, 180 changer transitions 0/657 dead transitions. [2024-06-27 19:59:34,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 657 transitions, 9133 flow [2024-06-27 19:59:34,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:59:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:59:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-27 19:59:34,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-27 19:59:34,564 INFO L175 Difference]: Start difference. First operand has 450 places, 600 transitions, 6701 flow. Second operand 11 states and 231 transitions. [2024-06-27 19:59:34,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 657 transitions, 9133 flow [2024-06-27 19:59:45,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 657 transitions, 8708 flow, removed 43 selfloop flow, removed 9 redundant places. [2024-06-27 19:59:45,735 INFO L231 Difference]: Finished difference. Result has 452 places, 602 transitions, 6860 flow [2024-06-27 19:59:45,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6276, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6860, PETRI_PLACES=452, PETRI_TRANSITIONS=602} [2024-06-27 19:59:45,736 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-27 19:59:45,736 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 602 transitions, 6860 flow [2024-06-27 19:59:45,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:59:45,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:45,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:45,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:59:45,736 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:59:45,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash -567214373, now seen corresponding path program 14 times [2024-06-27 19:59:45,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:45,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76253595] [2024-06-27 19:59:45,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:45,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:45,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:46,919 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 19:59:46,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:46,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76253595] [2024-06-27 19:59:46,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76253595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:46,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:46,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:59:46,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842418079] [2024-06-27 19:59:46,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:46,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:59:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:46,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:59:46,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:59:47,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-27 19:59:47,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 602 transitions, 6860 flow. Second operand has 12 states, 12 states have (on average 11.25) internal successors, (135), 12 states have internal predecessors, (135), 0 states have call successors, (0), 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 19:59:47,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:47,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-27 19:59:47,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:50,249 INFO L124 PetriNetUnfolderBase]: 5015/7946 cut-off events. [2024-06-27 19:59:50,249 INFO L125 PetriNetUnfolderBase]: For 3804907/3804910 co-relation queries the response was YES. [2024-06-27 19:59:50,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109306 conditions, 7946 events. 5015/7946 cut-off events. For 3804907/3804910 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 49670 event pairs, 818 based on Foata normal form. 20/7963 useless extension candidates. Maximal degree in co-relation 109094. Up to 6378 conditions per place. [2024-06-27 19:59:50,406 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 466 selfloop transitions, 180 changer transitions 0/651 dead transitions. [2024-06-27 19:59:50,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 651 transitions, 8578 flow [2024-06-27 19:59:50,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:59:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:59:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-27 19:59:50,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46487603305785125 [2024-06-27 19:59:50,407 INFO L175 Difference]: Start difference. First operand has 452 places, 602 transitions, 6860 flow. Second operand 11 states and 225 transitions. [2024-06-27 19:59:50,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 651 transitions, 8578 flow Killed by 15